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gecko/netwerk/protocol/http/nsHttpChannel.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim:set expandtab ts=4 sw=4 sts=4 cin: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsHttp.h"
#include "nsHttpChannel.h"
#include "nsHttpHandler.h"
#include "nsStandardURL.h"
#include "nsIApplicationCacheService.h"
#include "nsIApplicationCacheContainer.h"
#include "nsIAuthInformation.h"
#include "nsICryptoHash.h"
#include "nsIStringBundle.h"
#include "nsIIDNService.h"
#include "nsIStreamListenerTee.h"
#include "nsISeekableStream.h"
#include "nsMimeTypes.h"
#include "nsNetUtil.h"
#include "prprf.h"
#include "prnetdb.h"
#include "nsEscape.h"
#include "nsStreamUtils.h"
#include "nsIOService.h"
#include "nsICacheService.h"
#include "nsDNSPrefetch.h"
#include "nsChannelClassifier.h"
#include "nsIRedirectResultListener.h"
#include "mozilla/TimeStamp.h"
#include "nsError.h"
#include "nsAlgorithm.h"
#include "sampler.h"
#include "nsIConsoleService.h"
#include "base/compiler_specific.h"
#include "NullHttpTransaction.h"
#include "mozilla/Attributes.h"
namespace mozilla { namespace net {
namespace {
// Device IDs for various cache types
const char kDiskDeviceID[] = "disk";
const char kMemoryDeviceID[] = "memory";
const char kOfflineDeviceID[] = "offline";
// True if the local cache should be bypassed when processing a request.
#define BYPASS_LOCAL_CACHE(loadFlags) \
(loadFlags & (nsIRequest::LOAD_BYPASS_CACHE | \
nsICachingChannel::LOAD_BYPASS_LOCAL_CACHE))
static NS_DEFINE_CID(kStreamListenerTeeCID, NS_STREAMLISTENERTEE_CID);
static NS_DEFINE_CID(kStreamTransportServiceCID,
NS_STREAMTRANSPORTSERVICE_CID);
enum CacheDisposition {
kCacheHit = 1,
kCacheHitViaReval = 2,
kCacheMissedViaReval = 3,
kCacheMissed = 4
};
const Telemetry::ID UNKNOWN_DEVICE = static_cast<Telemetry::ID>(0);
void
AccumulateCacheHitTelemetry(Telemetry::ID deviceHistogram,
CacheDisposition hitOrMiss)
{
// If we had a cache hit, or we revalidated an entry, then we should know
// the device for the entry already. But, sometimes this assertion fails!
// (Bug 769497).
// MOZ_ASSERT(deviceHistogram != UNKNOWN_DEVICE || hitOrMiss == kCacheMissed);
Telemetry::Accumulate(Telemetry::HTTP_CACHE_DISPOSITION_2, hitOrMiss);
if (deviceHistogram != UNKNOWN_DEVICE) {
Telemetry::Accumulate(deviceHistogram, hitOrMiss);
}
}
const char *
GetCacheSessionNameForStoragePolicy(nsCacheStoragePolicy storagePolicy,
bool isPrivate)
{
MOZ_ASSERT(!isPrivate || storagePolicy == nsICache::STORE_IN_MEMORY);
switch (storagePolicy) {
case nsICache::STORE_IN_MEMORY:
return isPrivate ? "HTTP-memory-only-PB" : "HTTP-memory-only";
case nsICache::STORE_OFFLINE:
return "HTTP-offline";
default:
return "HTTP";
}
}
// Computes and returns a SHA1 hash of the input buffer. The input buffer
// must be a null-terminated string.
nsresult
Hash(const char *buf, nsACString &hash)
{
nsresult rv;
nsCOMPtr<nsICryptoHash> hasher
= do_CreateInstance(NS_CRYPTO_HASH_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = hasher->Init(nsICryptoHash::SHA1);
NS_ENSURE_SUCCESS(rv, rv);
rv = hasher->Update(reinterpret_cast<unsigned const char*>(buf),
strlen(buf));
NS_ENSURE_SUCCESS(rv, rv);
rv = hasher->Finish(true, hash);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
bool IsRedirectStatus(uint32_t status)
{
// 305 disabled as a security measure (see bug 187996).
return status == 300 || status == 301 || status == 302 || status == 303 ||
status == 307 || status == 308;
}
// We only treat 3xx responses as redirects if they have a Location header and
// the status code is in a whitelist.
bool
WillRedirect(const nsHttpResponseHead * response)
{
return IsRedirectStatus(response->Status()) &&
response->PeekHeader(nsHttp::Location);
}
void
MaybeMarkCacheEntryValid(const void * channel,
nsICacheEntryDescriptor * cacheEntry,
nsCacheAccessMode cacheAccess)
{
// Mark the cache entry as valid in order to allow others access to it.
// XXX: Is it really necessary to check for write acccess to the entry?
if (cacheAccess & nsICache::ACCESS_WRITE) {
nsresult rv = cacheEntry->MarkValid();
LOG(("Marking cache entry valid "
"[channel=%p, entry=%p, access=%d, result=%d]",
channel, cacheEntry, int(cacheAccess), int(rv)));
} else {
LOG(("Not marking read-only cache entry valid "
"[channel=%p, entry=%p, access=%d]",
channel, cacheEntry, int(cacheAccess)));
}
}
} // unnamed namespace
class AutoRedirectVetoNotifier
{
public:
AutoRedirectVetoNotifier(nsHttpChannel* channel) : mChannel(channel) {}
~AutoRedirectVetoNotifier() {ReportRedirectResult(false);}
void RedirectSucceeded() {ReportRedirectResult(true);}
private:
nsHttpChannel* mChannel;
void ReportRedirectResult(bool succeeded);
};
void
AutoRedirectVetoNotifier::ReportRedirectResult(bool succeeded)
{
if (!mChannel)
return;
mChannel->mRedirectChannel = nullptr;
nsCOMPtr<nsIRedirectResultListener> vetoHook;
NS_QueryNotificationCallbacks(mChannel,
NS_GET_IID(nsIRedirectResultListener),
getter_AddRefs(vetoHook));
mChannel = nullptr;
if (vetoHook)
vetoHook->OnRedirectResult(succeeded);
}
class HttpCacheQuery : public nsRunnable, public nsICacheListener
{
public:
HttpCacheQuery(nsHttpChannel * channel,
const nsACString & clientID,
nsCacheStoragePolicy storagePolicy,
bool usingPrivateBrowsing,
const nsACString & cacheKey,
nsCacheAccessMode accessToRequest,
bool noWait,
bool usingSSL,
bool loadedFromApplicationCache)
// in
: mChannel(channel)
, mHasQueryString(HasQueryString(channel->mRequestHead.Method(),
channel->mURI))
, mLoadFlags(channel->mLoadFlags)
, mCacheForOfflineUse(!!channel->mApplicationCacheForWrite)
, mFallbackChannel(channel->mFallbackChannel)
, mClientID(clientID)
, mStoragePolicy(storagePolicy)
, mUsingPrivateBrowsing(usingPrivateBrowsing)
, mCacheKey(cacheKey)
, mAccessToRequest(accessToRequest)
, mNoWait(noWait)
, mUsingSSL(usingSSL)
, mLoadedFromApplicationCache(loadedFromApplicationCache)
// internal
, mCacheAccess(0)
, mStatus(NS_ERROR_NOT_INITIALIZED)
, mRunCount(0)
// in/out
, mRequestHead(channel->mRequestHead)
, mRedirectedCachekeys(channel->mRedirectedCachekeys.forget())
// out
, mCachedContentIsValid(false)
, mCachedContentIsPartial(false)
, mCustomConditionalRequest(false)
, mDidReval(false)
, mCacheEntryDeviceTelemetryID(UNKNOWN_DEVICE)
{
MOZ_ASSERT(NS_IsMainThread());
}
nsresult Dispatch();
private:
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_NSIRUNNABLE
NS_DECL_NSICACHELISTENER
MOZ_ALWAYS_INLINE void AssertOnCacheThread() const
{
MOZ_ASSERT(mCacheThread);
#ifdef DEBUG
bool onCacheThread;
nsresult rv = mCacheThread->IsOnCurrentThread(&onCacheThread);
MOZ_ASSERT(NS_SUCCEEDED(rv));
MOZ_ASSERT(onCacheThread);
#endif
}
static bool HasQueryString(nsHttpAtom method, nsIURI * uri);
nsresult CheckCache();
bool ResponseWouldVary() const;
bool MustValidateBasedOnQueryUrl() const;
nsresult SetupByteRangeRequest(uint32_t partialLen);
nsresult OpenCacheInputStream(bool startBuffering);
nsCOMPtr<nsICacheListener> mChannel;
const bool mHasQueryString;
const uint32_t mLoadFlags;
const bool mCacheForOfflineUse;
const bool mFallbackChannel;
const InfallableCopyCString mClientID;
const nsCacheStoragePolicy mStoragePolicy;
const bool mUsingPrivateBrowsing;
const InfallableCopyCString mCacheKey;
const nsCacheAccessMode mAccessToRequest;
const bool mNoWait;
const bool mUsingSSL;
const bool mLoadedFromApplicationCache;
// Used only internally
nsCOMPtr<nsIEventTarget> mCacheThread;
nsCOMPtr<nsICacheEntryDescriptor> mCacheEntry;
nsCacheAccessMode mCacheAccess;
nsresult mStatus;
uint32_t mRunCount;
// Copied from HttpcacheQuery into nsHttpChannel by nsHttpChannel
friend class nsHttpChannel;
/*in/out*/ nsHttpRequestHead mRequestHead;
/*in/out*/ nsAutoPtr<nsTArray<nsCString> > mRedirectedCachekeys;
/*out*/ AutoClose<nsIInputStream> mCacheInputStream;
/*out*/ nsAutoPtr<nsHttpResponseHead> mCachedResponseHead;
/*out*/ nsCOMPtr<nsISupports> mCachedSecurityInfo;
/*out*/ bool mCachedContentIsValid;
/*out*/ bool mCachedContentIsPartial;
/*out*/ bool mCustomConditionalRequest;
/*out*/ bool mDidReval;
/*out*/ Telemetry::ID mCacheEntryDeviceTelemetryID;
};
NS_IMPL_ISUPPORTS_INHERITED1(HttpCacheQuery, nsRunnable, nsICacheListener)
//-----------------------------------------------------------------------------
// nsHttpChannel <public>
//-----------------------------------------------------------------------------
nsHttpChannel::nsHttpChannel()
: ALLOW_THIS_IN_INITIALIZER_LIST(HttpAsyncAborter<nsHttpChannel>(this))
, mLogicalOffset(0)
, mCacheAccess(0)
, mCacheEntryDeviceTelemetryID(UNKNOWN_DEVICE)
, mPostID(0)
, mRequestTime(0)
, mOnCacheEntryAvailableCallback(nullptr)
, mOfflineCacheAccess(0)
, mOfflineCacheLastModifiedTime(0)
, mCachedContentIsValid(false)
, mCachedContentIsPartial(false)
, mTransactionReplaced(false)
, mAuthRetryPending(false)
, mResuming(false)
, mInitedCacheEntry(false)
, mFallbackChannel(false)
, mCustomConditionalRequest(false)
, mFallingBack(false)
, mWaitingForRedirectCallback(false)
, mRequestTimeInitialized(false)
, mDidReval(false)
{
LOG(("Creating nsHttpChannel [this=%p]\n", this));
mChannelCreationTime = PR_Now();
mChannelCreationTimestamp = TimeStamp::Now();
}
nsHttpChannel::~nsHttpChannel()
{
LOG(("Destroying nsHttpChannel [this=%p]\n", this));
if (mAuthProvider)
mAuthProvider->Disconnect(NS_ERROR_ABORT);
}
nsresult
nsHttpChannel::Init(nsIURI *uri,
uint8_t caps,
nsProxyInfo *proxyInfo,
uint32_t proxyResolveFlags,
nsIURI *proxyURI)
{
nsresult rv = HttpBaseChannel::Init(uri, caps, proxyInfo,
proxyResolveFlags, proxyURI);
if (NS_FAILED(rv))
return rv;
LOG(("nsHttpChannel::Init [this=%p]\n", this));
return rv;
}
//-----------------------------------------------------------------------------
// nsHttpChannel <private>
//-----------------------------------------------------------------------------
nsresult
nsHttpChannel::Connect()
{
nsresult rv;
LOG(("nsHttpChannel::Connect [this=%p]\n", this));
// Even if we're in private browsing mode, we still enforce existing STS
// data (it is read-only).
// if the connection is not using SSL and either the exact host matches or
// a superdomain wants to force HTTPS, do it.
bool usingSSL = false;
rv = mURI->SchemeIs("https", &usingSSL);
NS_ENSURE_SUCCESS(rv,rv);
if (!usingSSL) {
// enforce Strict-Transport-Security
nsIStrictTransportSecurityService* stss = gHttpHandler->GetSTSService();
NS_ENSURE_TRUE(stss, NS_ERROR_OUT_OF_MEMORY);
bool isStsHost = false;
rv = stss->IsStsURI(mURI, &isStsHost);
// if STS fails, there's no reason to cancel the load, but it's
// worrisome.
NS_ASSERTION(NS_SUCCEEDED(rv),
"Something is wrong with STS: IsStsURI failed.");
if (NS_SUCCEEDED(rv) && isStsHost) {
LOG(("nsHttpChannel::Connect() STS permissions found\n"));
return AsyncCall(&nsHttpChannel::HandleAsyncRedirectChannelToHttps);
}
// Check for a previous SPDY Alternate-Protocol directive
if (gHttpHandler->IsSpdyEnabled() && mAllowSpdy) {
nsAutoCString hostPort;
if (NS_SUCCEEDED(mURI->GetHostPort(hostPort)) &&
gHttpHandler->ConnMgr()->GetSpdyAlternateProtocol(hostPort)) {
LOG(("nsHttpChannel::Connect() Alternate-Protocol found\n"));
return AsyncCall(
&nsHttpChannel::HandleAsyncRedirectChannelToHttps);
}
}
}
// ensure that we are using a valid hostname
if (!net_IsValidHostName(nsDependentCString(mConnectionInfo->Host())))
return NS_ERROR_UNKNOWN_HOST;
// Consider opening a TCP connection right away
SpeculativeConnect();
// Don't allow resuming when cache must be used
if (mResuming && (mLoadFlags & LOAD_ONLY_FROM_CACHE)) {
LOG(("Resuming from cache is not supported yet"));
return NS_ERROR_DOCUMENT_NOT_CACHED;
}
if (!gHttpHandler->UseCache())
return ContinueConnect();
// open a cache entry for this channel...
rv = OpenCacheEntry(usingSSL);
// do not continue if asyncOpenCacheEntry is in progress
if (mOnCacheEntryAvailableCallback) {
NS_ASSERTION(NS_SUCCEEDED(rv), "Unexpected state");
return NS_OK;
}
if (NS_FAILED(rv)) {
LOG(("OpenCacheEntry failed [rv=%x]\n", rv));
// if this channel is only allowed to pull from the cache, then
// we must fail if we were unable to open a cache entry.
if (mLoadFlags & LOAD_ONLY_FROM_CACHE) {
// If we have a fallback URI (and we're not already
// falling back), process the fallback asynchronously.
if (!mFallbackChannel && !mFallbackKey.IsEmpty()) {
return AsyncCall(&nsHttpChannel::HandleAsyncFallback);
}
return NS_ERROR_DOCUMENT_NOT_CACHED;
}
// otherwise, let's just proceed without using the cache.
}
// if cacheForOfflineUse has been set, open up an offline cache
// entry to update
if (mApplicationCacheForWrite) {
rv = OpenOfflineCacheEntryForWriting();
if (NS_FAILED(rv)) return rv;
if (mOnCacheEntryAvailableCallback)
return NS_OK;
}
return ContinueConnect();
}
nsresult
nsHttpChannel::ContinueConnect()
{
// we may or may not have a cache entry at this point
if (mCacheEntry) {
// read straight from the cache if possible...
if (mCachedContentIsValid) {
nsRunnableMethod<nsHttpChannel> *event = nullptr;
if (!mCachedContentIsPartial) {
AsyncCall(&nsHttpChannel::AsyncOnExamineCachedResponse, &event);
}
nsresult rv = ReadFromCache(true);
if (NS_FAILED(rv) && event) {
event->Revoke();
}
AccumulateCacheHitTelemetry(mCacheEntryDeviceTelemetryID,
kCacheHit);
return rv;
}
else if (mLoadFlags & LOAD_ONLY_FROM_CACHE) {
// the cache contains the requested resource, but it must be
// validated before we can reuse it. since we are not allowed
// to hit the net, there's nothing more to do. the document
// is effectively not in the cache.
return NS_ERROR_DOCUMENT_NOT_CACHED;
}
}
else if (mLoadFlags & LOAD_ONLY_FROM_CACHE) {
// If we have a fallback URI (and we're not already
// falling back), process the fallback asynchronously.
if (!mFallbackChannel && !mFallbackKey.IsEmpty()) {
return AsyncCall(&nsHttpChannel::HandleAsyncFallback);
}
return NS_ERROR_DOCUMENT_NOT_CACHED;
}
if (mLoadFlags & LOAD_NO_NETWORK_IO) {
return NS_ERROR_DOCUMENT_NOT_CACHED;
}
// hit the net...
nsresult rv = SetupTransaction();
if (NS_FAILED(rv)) return rv;
rv = gHttpHandler->InitiateTransaction(mTransaction, mPriority);
if (NS_FAILED(rv)) return rv;
rv = mTransactionPump->AsyncRead(this, nullptr);
if (NS_FAILED(rv)) return rv;
uint32_t suspendCount = mSuspendCount;
while (suspendCount--)
mTransactionPump->Suspend();
return NS_OK;
}
void
nsHttpChannel::SpeculativeConnect()
{
// Before we take the latency hit of dealing with the cache, try and
// get the TCP (and SSL) handshakes going so they can overlap.
// don't speculate on uses of the offline application cache,
// if we are offline, when doing http upgrade (i.e. websockets bootstrap),
// or if we can't do keep-alive (because then we couldn't reuse
// the speculative connection anyhow).
if (mApplicationCache || gIOService->IsOffline() ||
mUpgradeProtocolCallback || !(mCaps & NS_HTTP_ALLOW_KEEPALIVE))
return;
// LOAD_ONLY_FROM_CACHE and LOAD_NO_NETWORK_IO must not hit network.
// LOAD_FROM_CACHE and LOAD_CHECK_OFFLINE_CACHE are unlikely to hit network,
// so skip preconnects for them.
if (mLoadFlags & (LOAD_ONLY_FROM_CACHE | LOAD_FROM_CACHE |
LOAD_NO_NETWORK_IO | LOAD_CHECK_OFFLINE_CACHE))
return;
nsCOMPtr<nsIInterfaceRequestor> callbacks;
NS_NewNotificationCallbacksAggregation(mCallbacks, mLoadGroup,
getter_AddRefs(callbacks));
if (!callbacks)
return;
mConnectionInfo->SetAnonymous((mLoadFlags & LOAD_ANONYMOUS) != 0);
mConnectionInfo->SetPrivate(mPrivateBrowsing);
gHttpHandler->SpeculativeConnect(mConnectionInfo,
callbacks, NS_GetCurrentThread());
}
void
nsHttpChannel::DoNotifyListenerCleanup()
{
// We don't need this info anymore
CleanRedirectCacheChainIfNecessary();
}
void
nsHttpChannel::HandleAsyncRedirect()
{
NS_PRECONDITION(!mCallOnResume, "How did that happen?");
if (mSuspendCount) {
LOG(("Waiting until resume to do async redirect [this=%p]\n", this));
mCallOnResume = &nsHttpChannel::HandleAsyncRedirect;
return;
}
nsresult rv = NS_OK;
LOG(("nsHttpChannel::HandleAsyncRedirect [this=%p]\n", this));
// since this event is handled asynchronously, it is possible that this
// channel could have been canceled, in which case there would be no point
// in processing the redirect.
if (NS_SUCCEEDED(mStatus)) {
PushRedirectAsyncFunc(&nsHttpChannel::ContinueHandleAsyncRedirect);
rv = AsyncProcessRedirection(mResponseHead->Status());
if (NS_FAILED(rv)) {
PopRedirectAsyncFunc(&nsHttpChannel::ContinueHandleAsyncRedirect);
// TODO: if !DoNotRender3xxBody(), render redirect body instead.
// But first we need to cache 3xx bodies (bug 748510)
ContinueHandleAsyncRedirect(rv);
}
}
else {
ContinueHandleAsyncRedirect(NS_OK);
}
}
nsresult
nsHttpChannel::ContinueHandleAsyncRedirect(nsresult rv)
{
if (NS_FAILED(rv)) {
// If AsyncProcessRedirection fails, then we have to send out the
// OnStart/OnStop notifications.
LOG(("ContinueHandleAsyncRedirect got failure result [rv=%x]\n", rv));
mStatus = rv;
DoNotifyListener();
}
// close the cache entry. Blow it away if we couldn't process the redirect
// for some reason (the cache entry might be corrupt).
if (mCacheEntry) {
if (NS_FAILED(rv))
mCacheEntry->AsyncDoom(nullptr);
}
CloseCacheEntry(false);
mIsPending = false;
if (mLoadGroup)
mLoadGroup->RemoveRequest(this, nullptr, mStatus);
return NS_OK;
}
void
nsHttpChannel::HandleAsyncNotModified()
{
NS_PRECONDITION(!mCallOnResume, "How did that happen?");
if (mSuspendCount) {
LOG(("Waiting until resume to do async not-modified [this=%p]\n",
this));
mCallOnResume = &nsHttpChannel::HandleAsyncNotModified;
return;
}
LOG(("nsHttpChannel::HandleAsyncNotModified [this=%p]\n", this));
DoNotifyListener();
CloseCacheEntry(true);
mIsPending = false;
if (mLoadGroup)
mLoadGroup->RemoveRequest(this, nullptr, mStatus);
}
void
nsHttpChannel::HandleAsyncFallback()
{
NS_PRECONDITION(!mCallOnResume, "How did that happen?");
if (mSuspendCount) {
LOG(("Waiting until resume to do async fallback [this=%p]\n", this));
mCallOnResume = &nsHttpChannel::HandleAsyncFallback;
return;
}
nsresult rv = NS_OK;
LOG(("nsHttpChannel::HandleAsyncFallback [this=%p]\n", this));
// since this event is handled asynchronously, it is possible that this
// channel could have been canceled, in which case there would be no point
// in processing the fallback.
if (!mCanceled) {
PushRedirectAsyncFunc(&nsHttpChannel::ContinueHandleAsyncFallback);
bool waitingForRedirectCallback;
rv = ProcessFallback(&waitingForRedirectCallback);
if (waitingForRedirectCallback)
return;
PopRedirectAsyncFunc(&nsHttpChannel::ContinueHandleAsyncFallback);
}
ContinueHandleAsyncFallback(rv);
}
nsresult
nsHttpChannel::ContinueHandleAsyncFallback(nsresult rv)
{
if (!mCanceled && (NS_FAILED(rv) || !mFallingBack)) {
// If ProcessFallback fails, then we have to send out the
// OnStart/OnStop notifications.
LOG(("ProcessFallback failed [rv=%x, %d]\n", rv, mFallingBack));
mStatus = NS_FAILED(rv) ? rv : NS_ERROR_DOCUMENT_NOT_CACHED;
DoNotifyListener();
}
mIsPending = false;
if (mLoadGroup)
mLoadGroup->RemoveRequest(this, nullptr, mStatus);
return rv;
}
nsresult
nsHttpChannel::SetupTransaction()
{
LOG(("nsHttpChannel::SetupTransaction [this=%p]\n", this));
NS_ENSURE_TRUE(!mTransaction, NS_ERROR_ALREADY_INITIALIZED);
nsresult rv;
if (mCaps & NS_HTTP_ALLOW_PIPELINING) {
//
// disable pipelining if:
// (1) pipelining has been disabled by config
// (2) pipelining has been disabled by connection mgr info
// (3) request corresponds to a top-level document load (link click)
// (4) request method is non-idempotent
// (5) request is marked slow (e.g XHR)
//
if (!mAllowPipelining ||
(mLoadFlags & (LOAD_INITIAL_DOCUMENT_URI | INHIBIT_PIPELINE)) ||
!(mRequestHead.Method() == nsHttp::Get ||
mRequestHead.Method() == nsHttp::Head ||
mRequestHead.Method() == nsHttp::Options ||
mRequestHead.Method() == nsHttp::Propfind ||
mRequestHead.Method() == nsHttp::Proppatch)) {
LOG((" pipelining disallowed\n"));
mCaps &= ~NS_HTTP_ALLOW_PIPELINING;
}
}
if (!mAllowSpdy)
mCaps |= NS_HTTP_DISALLOW_SPDY;
// Use the URI path if not proxying (transparent proxying such as proxy
// CONNECT does not count here). Also figure out what HTTP version to use.
nsAutoCString buf, path;
nsCString* requestURI;
if (mConnectionInfo->UsingConnect() ||
!mConnectionInfo->UsingHttpProxy()) {
rv = mURI->GetPath(path);
if (NS_FAILED(rv)) return rv;
// path may contain UTF-8 characters, so ensure that they're escaped.
if (NS_EscapeURL(path.get(), path.Length(), esc_OnlyNonASCII, buf))
requestURI = &buf;
else
requestURI = &path;
mRequestHead.SetVersion(gHttpHandler->HttpVersion());
}
else {
rv = mURI->GetUserPass(buf);
if (NS_FAILED(rv)) return rv;
if (!buf.IsEmpty() && ((strncmp(mSpec.get(), "http:", 5) == 0) ||
strncmp(mSpec.get(), "https:", 6) == 0)) {
nsCOMPtr<nsIURI> tempURI;
rv = mURI->Clone(getter_AddRefs(tempURI));
if (NS_FAILED(rv)) return rv;
rv = tempURI->SetUserPass(EmptyCString());
if (NS_FAILED(rv)) return rv;
rv = tempURI->GetAsciiSpec(path);
if (NS_FAILED(rv)) return rv;
requestURI = &path;
}
else
requestURI = &mSpec;
mRequestHead.SetVersion(gHttpHandler->ProxyHttpVersion());
}
// trim off the #ref portion if any...
int32_t ref = requestURI->FindChar('#');
if (ref != kNotFound)
requestURI->SetLength(ref);
mRequestHead.SetRequestURI(*requestURI);
// set the request time for cache expiration calculations
mRequestTime = NowInSeconds();
mRequestTimeInitialized = true;
// if doing a reload, force end-to-end
if (mLoadFlags & LOAD_BYPASS_CACHE) {
// We need to send 'Pragma:no-cache' to inhibit proxy caching even if
// no proxy is configured since we might be talking with a transparent
// proxy, i.e. one that operates at the network level. See bug #14772.
mRequestHead.SetHeaderOnce(nsHttp::Pragma, "no-cache", true);
// If we're configured to speak HTTP/1.1 then also send 'Cache-control:
// no-cache'
if (mRequestHead.Version() >= NS_HTTP_VERSION_1_1)
mRequestHead.SetHeaderOnce(nsHttp::Cache_Control, "no-cache", true);
}
else if ((mLoadFlags & VALIDATE_ALWAYS) && (mCacheAccess & nsICache::ACCESS_READ)) {
// We need to send 'Cache-Control: max-age=0' to force each cache along
// the path to the origin server to revalidate its own entry, if any,
// with the next cache or server. See bug #84847.
//
// If we're configured to speak HTTP/1.0 then just send 'Pragma: no-cache'
if (mRequestHead.Version() >= NS_HTTP_VERSION_1_1)
mRequestHead.SetHeaderOnce(nsHttp::Cache_Control, "max-age=0", true);
else
mRequestHead.SetHeaderOnce(nsHttp::Pragma, "no-cache", true);
}
if (mResuming) {
char byteRange[32];
PR_snprintf(byteRange, sizeof(byteRange), "bytes=%llu-", mStartPos);
mRequestHead.SetHeader(nsHttp::Range, nsDependentCString(byteRange));
if (!mEntityID.IsEmpty()) {
// Also, we want an error if this resource changed in the meantime
// Format of the entity id is: escaped_etag/size/lastmod
nsCString::const_iterator start, end, slash;
mEntityID.BeginReading(start);
mEntityID.EndReading(end);
mEntityID.BeginReading(slash);
if (FindCharInReadable('/', slash, end)) {
nsAutoCString ifMatch;
mRequestHead.SetHeader(nsHttp::If_Match,
NS_UnescapeURL(Substring(start, slash), 0, ifMatch));
++slash; // Incrementing, so that searching for '/' won't find
// the same slash again
}
if (FindCharInReadable('/', slash, end)) {
mRequestHead.SetHeader(nsHttp::If_Unmodified_Since,
Substring(++slash, end));
}
}
}
// create wrapper for this channel's notification callbacks
nsCOMPtr<nsIInterfaceRequestor> callbacks;
NS_NewNotificationCallbacksAggregation(mCallbacks, mLoadGroup,
getter_AddRefs(callbacks));
if (!callbacks)
return NS_ERROR_OUT_OF_MEMORY;
// create the transaction object
mTransaction = new nsHttpTransaction();
if (!mTransaction)
return NS_ERROR_OUT_OF_MEMORY;
// See bug #466080. Transfer LOAD_ANONYMOUS flag to socket-layer.
if (mLoadFlags & LOAD_ANONYMOUS)
mCaps |= NS_HTTP_LOAD_ANONYMOUS;
if (mTimingEnabled)
mCaps |= NS_HTTP_TIMING_ENABLED;
mConnectionInfo->SetAnonymous((mLoadFlags & LOAD_ANONYMOUS) != 0);
mConnectionInfo->SetPrivate(mPrivateBrowsing);
if (mUpgradeProtocolCallback) {
mRequestHead.SetHeader(nsHttp::Upgrade, mUpgradeProtocol, false);
mRequestHead.SetHeaderOnce(nsHttp::Connection,
nsHttp::Upgrade.get(),
true);
mCaps |= NS_HTTP_STICKY_CONNECTION;
mCaps &= ~NS_HTTP_ALLOW_PIPELINING;
mCaps &= ~NS_HTTP_ALLOW_KEEPALIVE;
mCaps |= NS_HTTP_DISALLOW_SPDY;
}
nsCOMPtr<nsIAsyncInputStream> responseStream;
rv = mTransaction->Init(mCaps, mConnectionInfo, &mRequestHead,
mUploadStream, mUploadStreamHasHeaders,
NS_GetCurrentThread(), callbacks, this,
getter_AddRefs(responseStream));
if (NS_FAILED(rv)) {
mTransaction = nullptr;
return rv;
}
rv = nsInputStreamPump::Create(getter_AddRefs(mTransactionPump),
responseStream);
return rv;
}
// NOTE: This function duplicates code from nsBaseChannel. This will go away
// once HTTP uses nsBaseChannel (part of bug 312760)
static void
CallTypeSniffers(void *aClosure, const uint8_t *aData, uint32_t aCount)
{
nsIChannel *chan = static_cast<nsIChannel*>(aClosure);
const nsCOMArray<nsIContentSniffer>& sniffers =
gIOService->GetContentSniffers();
uint32_t length = sniffers.Count();
for (uint32_t i = 0; i < length; ++i) {
nsAutoCString newType;
nsresult rv =
sniffers[i]->GetMIMETypeFromContent(chan, aData, aCount, newType);
if (NS_SUCCEEDED(rv) && !newType.IsEmpty()) {
chan->SetContentType(newType);
break;
}
}
}
nsresult
nsHttpChannel::CallOnStartRequest()
{
mTracingEnabled = false;
bool shouldSniff = mResponseHead && (mResponseHead->ContentType().IsEmpty() ||
((mResponseHead->ContentType().EqualsLiteral(APPLICATION_OCTET_STREAM) &&
(mLoadFlags & LOAD_TREAT_APPLICATION_OCTET_STREAM_AS_UNKNOWN))));
if (shouldSniff) {
NS_ASSERTION(mConnectionInfo, "Should have connection info here");
if (!mContentTypeHint.IsEmpty())
mResponseHead->SetContentType(mContentTypeHint);
else if (mResponseHead->Version() == NS_HTTP_VERSION_0_9 &&
mConnectionInfo->Port() != mConnectionInfo->DefaultPort())
mResponseHead->SetContentType(NS_LITERAL_CSTRING(TEXT_PLAIN));
else {
// Uh-oh. We had better find out what type we are!
// XXX This does not work with content-encodings... but
// neither does applying the conversion from the URILoader
nsCOMPtr<nsIStreamConverterService> serv;
nsresult rv = gHttpHandler->
GetStreamConverterService(getter_AddRefs(serv));
// If we failed, we just fall through to the "normal" case
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIStreamListener> converter;
rv = serv->AsyncConvertData(UNKNOWN_CONTENT_TYPE,
"*/*",
mListener,
mListenerContext,
getter_AddRefs(converter));
if (NS_SUCCEEDED(rv)) {
mListener = converter;
}
}
}
}
if (mResponseHead && mResponseHead->ContentCharset().IsEmpty())
mResponseHead->SetContentCharset(mContentCharsetHint);
if (mResponseHead && mCacheEntry) {
// If we have a cache entry, set its predicted size to ContentLength to
// avoid caching an entry that will exceed the max size limit.
nsresult rv = mCacheEntry->SetPredictedDataSize(
mResponseHead->ContentLength());
NS_ENSURE_SUCCESS(rv, rv);
}
// Allow consumers to override our content type
if ((mLoadFlags & LOAD_CALL_CONTENT_SNIFFERS) &&
gIOService->GetContentSniffers().Count() != 0) {
// NOTE: We can have both a txn pump and a cache pump when the cache
// content is partial. In that case, we need to read from the cache,
// because that's the one that has the initial contents. If that fails
// then give the transaction pump a shot.
nsIChannel* thisChannel = static_cast<nsIChannel*>(this);
bool typeSniffersCalled = false;
if (mCachePump) {
typeSniffersCalled =
NS_SUCCEEDED(mCachePump->PeekStream(CallTypeSniffers, thisChannel));
}
if (!typeSniffersCalled && mTransactionPump) {
mTransactionPump->PeekStream(CallTypeSniffers, thisChannel);
}
}
LOG((" calling mListener->OnStartRequest\n"));
nsresult rv = mListener->OnStartRequest(this, mListenerContext);
if (NS_FAILED(rv)) return rv;
// install stream converter if required
rv = ApplyContentConversions();
if (NS_FAILED(rv)) return rv;
rv = EnsureAssocReq();
if (NS_FAILED(rv))
return rv;
// if this channel is for a download, close off access to the cache.
if (mCacheEntry && mChannelIsForDownload) {
mCacheEntry->AsyncDoom(nullptr);
CloseCacheEntry(false);
}
if (!mCanceled) {
// create offline cache entry if offline caching was requested
if (ShouldUpdateOfflineCacheEntry()) {
LOG(("writing to the offline cache"));
rv = InitOfflineCacheEntry();
if (NS_FAILED(rv)) return rv;
// InitOfflineCacheEntry may have closed mOfflineCacheEntry
if (mOfflineCacheEntry) {
rv = InstallOfflineCacheListener();
if (NS_FAILED(rv)) return rv;
}
} else if (mApplicationCacheForWrite) {
LOG(("offline cache is up to date, not updating"));
CloseOfflineCacheEntry();
}
}
return NS_OK;
}
nsresult
nsHttpChannel::ProcessFailedProxyConnect(uint32_t httpStatus)
{
// Failure to set up a proxy tunnel via CONNECT means one of the following:
// 1) Proxy wants authorization, or forbids.
// 2) DNS at proxy couldn't resolve target URL.
// 3) Proxy connection to target failed or timed out.
// 4) Eve intercepted our CONNECT, and is replying with malicious HTML.
//
// Our current architecture would parse the proxy's response content with
// the permission of the target URL. Given #4, we must avoid rendering the
// body of the reply, and instead give the user a (hopefully helpful)
// boilerplate error page, based on just the HTTP status of the reply.
NS_ABORT_IF_FALSE(mConnectionInfo->UsingConnect(),
"proxy connect failed but not using CONNECT?");
nsresult rv;
switch (httpStatus)
{
case 300: case 301: case 302: case 303: case 307: case 308:
// Bad redirect: not top-level, or it's a POST, bad/missing Location,
// or ProcessRedirect() failed for some other reason. Legal
// redirects that fail because site not available, etc., are handled
// elsewhere, in the regular codepath.
rv = NS_ERROR_CONNECTION_REFUSED;
break;
case 403: // HTTP/1.1: "Forbidden"
case 407: // ProcessAuthentication() failed
case 501: // HTTP/1.1: "Not Implemented"
// user sees boilerplate Mozilla "Proxy Refused Connection" page.
rv = NS_ERROR_PROXY_CONNECTION_REFUSED;
break;
// Squid sends 404 if DNS fails (regular 404 from target is tunneled)
case 404: // HTTP/1.1: "Not Found"
// RFC 2616: "some deployed proxies are known to return 400 or 500 when
// DNS lookups time out." (Squid uses 500 if it runs out of sockets: so
// we have a conflict here).
case 400: // HTTP/1.1 "Bad Request"
case 500: // HTTP/1.1: "Internal Server Error"
/* User sees: "Address Not Found: Firefox can't find the server at
* www.foo.com."
*/
rv = NS_ERROR_UNKNOWN_HOST;
break;
case 502: // HTTP/1.1: "Bad Gateway" (invalid resp from target server)
// Squid returns 503 if target request fails for anything but DNS.
case 503: // HTTP/1.1: "Service Unavailable"
/* User sees: "Failed to Connect:
* Firefox can't establish a connection to the server at
* www.foo.com. Though the site seems valid, the browser
* was unable to establish a connection."
*/
rv = NS_ERROR_CONNECTION_REFUSED;
break;
// RFC 2616 uses 504 for both DNS and target timeout, so not clear what to
// do here: picking target timeout, as DNS covered by 400/404/500
case 504: // HTTP/1.1: "Gateway Timeout"
// user sees: "Network Timeout: The server at www.foo.com
// is taking too long to respond."
rv = NS_ERROR_NET_TIMEOUT;
break;
// Confused proxy server or malicious response
default:
rv = NS_ERROR_PROXY_CONNECTION_REFUSED;
break;
}
LOG(("Cancelling failed proxy CONNECT [this=%p httpStatus=%u]\n",
this, httpStatus));
Cancel(rv);
CallOnStartRequest();
return rv;
}
/**
* Decide whether or not to remember Strict-Transport-Security, and whether
* or not to enforce channel integrity.
*
* @return NS_ERROR_FAILURE if there's security information missing even though
* it's an HTTPS connection.
*/
nsresult
nsHttpChannel::ProcessSTSHeader()
{
nsresult rv;
bool isHttps = false;
rv = mURI->SchemeIs("https", &isHttps);
NS_ENSURE_SUCCESS(rv, rv);
// If this channel is not loading securely, STS doesn't do anything.
// The upgrade to HTTPS takes place earlier in the channel load process.
if (!isHttps)
return NS_OK;
nsAutoCString asciiHost;
rv = mURI->GetAsciiHost(asciiHost);
NS_ENSURE_SUCCESS(rv, NS_OK);
// If the channel is not a hostname, but rather an IP, STS doesn't do
// anything.
PRNetAddr hostAddr;
if (PR_SUCCESS == PR_StringToNetAddr(asciiHost.get(), &hostAddr))
return NS_OK;
nsIStrictTransportSecurityService* stss = gHttpHandler->GetSTSService();
NS_ENSURE_TRUE(stss, NS_ERROR_OUT_OF_MEMORY);
// mSecurityInfo may not always be present, and if it's not then it is okay
// to just disregard any STS headers since we know nothing about the
// security of the connection.
NS_ENSURE_TRUE(mSecurityInfo, NS_OK);
// Check the trustworthiness of the channel (are there any cert errors?)
// If there are certificate errors, we still load the data, we just ignore
// any STS headers that are present.
bool tlsIsBroken = false;
rv = stss->ShouldIgnoreStsHeader(mSecurityInfo, &tlsIsBroken);
NS_ENSURE_SUCCESS(rv, NS_OK);
// If this was already an STS host, the connection should have been aborted
// by the bad cert handler in the case of cert errors. If it didn't abort the connection,
// there's probably something funny going on.
// If this wasn't an STS host, errors are allowed, but no more STS processing
// will happen during the session.
bool wasAlreadySTSHost;
rv = stss->IsStsURI(mURI, &wasAlreadySTSHost);
// Failure here means STS is broken. Don't prevent the load, but this
// shouldn't fail.
NS_ENSURE_SUCCESS(rv, NS_OK);
NS_ASSERTION(!(wasAlreadySTSHost && tlsIsBroken),
"connection should have been aborted by nss-bad-cert-handler");
// Any STS header is ignored if the channel is not trusted due to
// certificate errors (STS Spec 7.1) -- there is nothing else to do, and
// the load may progress.
if (tlsIsBroken) {
LOG(("STS: Transport layer is not trustworthy, ignoring "
"STS headers and continuing load\n"));
return NS_OK;
}
// If there's a STS header, process it (STS Spec 7.1). At this point in
// processing, the channel is trusted, so the header should not be ignored.
const nsHttpAtom atom = nsHttp::ResolveAtom("Strict-Transport-Security");
nsAutoCString stsHeader;
rv = mResponseHead->GetHeader(atom, stsHeader);
if (rv == NS_ERROR_NOT_AVAILABLE) {
LOG(("STS: No STS header, continuing load.\n"));
return NS_OK;
}
// All other failures are fatal.
NS_ENSURE_SUCCESS(rv, rv);
rv = stss->ProcessStsHeader(mURI, stsHeader.get(), NULL, NULL);
if (NS_FAILED(rv)) {
LOG(("STS: Failed to parse STS header, continuing load.\n"));
return NS_OK;
}
return NS_OK;
}
nsresult
nsHttpChannel::ProcessResponse()
{
nsresult rv;
uint32_t httpStatus = mResponseHead->Status();
LOG(("nsHttpChannel::ProcessResponse [this=%p httpStatus=%u]\n",
this, httpStatus));
if (mTransaction->ProxyConnectFailed()) {
// Only allow 407 (authentication required) to continue
if (httpStatus != 407)
return ProcessFailedProxyConnect(httpStatus);
// If proxy CONNECT response needs to complete, wait to process connection
// for Strict-Transport-Security.
} else {
// Given a successful connection, process any STS data that's relevant.
rv = ProcessSTSHeader();
NS_ASSERTION(NS_SUCCEEDED(rv), "ProcessSTSHeader failed, continuing load.");
}
MOZ_ASSERT(!mCachedContentIsValid);
// notify "http-on-examine-response" observers
gHttpHandler->OnExamineResponse(this);
SetCookie(mResponseHead->PeekHeader(nsHttp::Set_Cookie));
// handle unused username and password in url (see bug 232567)
if (httpStatus != 401 && httpStatus != 407) {
if (!mAuthRetryPending)
mAuthProvider->CheckForSuperfluousAuth();
if (mCanceled)
return CallOnStartRequest();
// reset the authentication's current continuation state because our
// last authentication attempt has been completed successfully
mAuthProvider->Disconnect(NS_ERROR_ABORT);
mAuthProvider = nullptr;
LOG((" continuation state has been reset"));
}
bool successfulReval = false;
// handle different server response categories. Note that we handle
// caching or not caching of error pages in
// nsHttpResponseHead::MustValidate; if you change this switch, update that
// one
switch (httpStatus) {
case 200:
case 203:
// Per RFC 2616, 14.35.2, "A server MAY ignore the Range header".
// So if a server does that and sends 200 instead of 206 that we
// expect, notify our caller.
// However, if we wanted to start from the beginning, let it go through
if (mResuming && mStartPos != 0) {
LOG(("Server ignored our Range header, cancelling [this=%p]\n", this));
Cancel(NS_ERROR_NOT_RESUMABLE);
rv = CallOnStartRequest();
break;
}
// these can normally be cached
rv = ProcessNormal();
MaybeInvalidateCacheEntryForSubsequentGet();
break;
case 206:
if (mCachedContentIsPartial) // an internal byte range request...
rv = ProcessPartialContent();
else {
mCacheInputStream.CloseAndRelease();
rv = ProcessNormal();
}
break;
case 300:
case 301:
case 302:
case 307:
case 308:
case 303:
#if 0
case 305: // disabled as a security measure (see bug 187996).
#endif
// don't store the response body for redirects
MaybeInvalidateCacheEntryForSubsequentGet();
PushRedirectAsyncFunc(&nsHttpChannel::ContinueProcessResponse);
rv = AsyncProcessRedirection(httpStatus);
if (NS_FAILED(rv)) {
PopRedirectAsyncFunc(&nsHttpChannel::ContinueProcessResponse);
LOG(("AsyncProcessRedirection failed [rv=%x]\n", rv));
// don't cache failed redirect responses.
if (mCacheEntry)
mCacheEntry->AsyncDoom(nullptr);
if (DoNotRender3xxBody(rv)) {
mStatus = rv;
DoNotifyListener();
} else {
rv = ContinueProcessResponse(rv);
}
}
break;
case 304:
rv = ProcessNotModified();
if (NS_FAILED(rv)) {
LOG(("ProcessNotModified failed [rv=%x]\n", rv));
mCacheInputStream.CloseAndRelease();
rv = ProcessNormal();
}
else {
successfulReval = true;
}
break;
case 401:
case 407:
rv = mAuthProvider->ProcessAuthentication(
httpStatus, mConnectionInfo->UsingSSL() &&
mTransaction->ProxyConnectFailed());
if (rv == NS_ERROR_IN_PROGRESS) {
// authentication prompt has been invoked and result
// is expected asynchronously
mAuthRetryPending = true;
// suspend the transaction pump to stop receiving the
// unauthenticated content data. We will throw that data
// away when user provides credentials or resume the pump
// when user refuses to authenticate.
LOG(("Suspending the transaction, asynchronously prompting for credentials"));
mTransactionPump->Suspend();
rv = NS_OK;
}
else if (NS_FAILED(rv)) {
LOG(("ProcessAuthentication failed [rv=%x]\n", rv));
if (mTransaction->ProxyConnectFailed())
return ProcessFailedProxyConnect(httpStatus);
if (!mAuthRetryPending)
mAuthProvider->CheckForSuperfluousAuth();
rv = ProcessNormal();
}
else
mAuthRetryPending = true; // see DoAuthRetry
break;
default:
rv = ProcessNormal();
MaybeInvalidateCacheEntryForSubsequentGet();
break;
}
CacheDisposition cacheDisposition;
if (!mDidReval)
cacheDisposition = kCacheMissed;
else if (successfulReval)
cacheDisposition = kCacheHitViaReval;
else
cacheDisposition = kCacheMissedViaReval;
AccumulateCacheHitTelemetry(mCacheEntryDeviceTelemetryID,
cacheDisposition);
return rv;
}
nsresult
nsHttpChannel::ContinueProcessResponse(nsresult rv)
{
bool doNotRender = DoNotRender3xxBody(rv);
if (rv == NS_ERROR_DOM_BAD_URI && mRedirectURI) {
bool isHTTP = false;
if (NS_FAILED(mRedirectURI->SchemeIs("http", &isHTTP)))
isHTTP = false;
if (!isHTTP && NS_FAILED(mRedirectURI->SchemeIs("https", &isHTTP)))
isHTTP = false;
if (!isHTTP) {
// This was a blocked attempt to redirect and subvert the system by
// redirecting to another protocol (perhaps javascript:)
// In that case we want to throw an error instead of displaying the
// non-redirected response body.
LOG(("ContinueProcessResponse detected rejected Non-HTTP Redirection"));
doNotRender = true;
rv = NS_ERROR_CORRUPTED_CONTENT;
}
}
if (doNotRender) {
Cancel(rv);
DoNotifyListener();
return rv;
}
if (NS_SUCCEEDED(rv)) {
InitCacheEntry();
CloseCacheEntry(false);
if (mApplicationCacheForWrite) {
// Store response in the offline cache
InitOfflineCacheEntry();
CloseOfflineCacheEntry();
}
return NS_OK;
}
LOG(("ContinueProcessResponse got failure result [rv=%x]\n", rv));
if (mTransaction->ProxyConnectFailed()) {
return ProcessFailedProxyConnect(mRedirectType);
}
return ProcessNormal();
}
nsresult
nsHttpChannel::ProcessNormal()
{
nsresult rv;
LOG(("nsHttpChannel::ProcessNormal [this=%p]\n", this));
bool succeeded;
rv = GetRequestSucceeded(&succeeded);
if (NS_SUCCEEDED(rv) && !succeeded) {
PushRedirectAsyncFunc(&nsHttpChannel::ContinueProcessNormal);
bool waitingForRedirectCallback;
(void)ProcessFallback(&waitingForRedirectCallback);
if (waitingForRedirectCallback) {
// The transaction has been suspended by ProcessFallback.
return NS_OK;
}
PopRedirectAsyncFunc(&nsHttpChannel::ContinueProcessNormal);
}
return ContinueProcessNormal(NS_OK);
}
nsresult
nsHttpChannel::ContinueProcessNormal(nsresult rv)
{
if (NS_FAILED(rv)) {
// Fill the failure status here, we have failed to fall back, thus we
// have to report our status as failed.
mStatus = rv;
DoNotifyListener();
return rv;
}
if (mFallingBack) {
// Do not continue with normal processing, fallback is in
// progress now.
return NS_OK;
}
// if we're here, then any byte-range requests failed to result in a partial
// response. we must clear this flag to prevent BufferPartialContent from
// being called inside our OnDataAvailable (see bug 136678).
mCachedContentIsPartial = false;
ClearBogusContentEncodingIfNeeded();
UpdateInhibitPersistentCachingFlag();
// this must be called before firing OnStartRequest, since http clients,
// such as imagelib, expect our cache entry to already have the correct
// expiration time (bug 87710).
if (mCacheEntry) {
rv = InitCacheEntry();
if (NS_FAILED(rv))
CloseCacheEntry(true);
}
// Check that the server sent us what we were asking for
if (mResuming) {
// Create an entity id from the response
nsAutoCString id;
rv = GetEntityID(id);
if (NS_FAILED(rv)) {
// If creating an entity id is not possible -> error
Cancel(NS_ERROR_NOT_RESUMABLE);
}
else if (mResponseHead->Status() != 206 &&
mResponseHead->Status() != 200) {
// Probably 404 Not Found, 412 Precondition Failed or
// 416 Invalid Range -> error
LOG(("Unexpected response status while resuming, aborting [this=%p]\n",
this));
Cancel(NS_ERROR_ENTITY_CHANGED);
}
// If we were passed an entity id, verify it's equal to the server's
else if (!mEntityID.IsEmpty()) {
if (!mEntityID.Equals(id)) {
LOG(("Entity mismatch, expected '%s', got '%s', aborting [this=%p]",
mEntityID.get(), id.get(), this));
Cancel(NS_ERROR_ENTITY_CHANGED);
}
}
}
rv = CallOnStartRequest();
if (NS_FAILED(rv)) return rv;
// install cache listener if we still have a cache entry open
if (mCacheEntry && (mCacheAccess & nsICache::ACCESS_WRITE)) {
rv = InstallCacheListener();
if (NS_FAILED(rv)) return rv;
}
return NS_OK;
}
nsresult
nsHttpChannel::PromptTempRedirect()
{
if (!gHttpHandler->PromptTempRedirect()) {
return NS_OK;
}
nsresult rv;
nsCOMPtr<nsIStringBundleService> bundleService =
do_GetService(NS_STRINGBUNDLE_CONTRACTID, &rv);
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsIStringBundle> stringBundle;
rv = bundleService->CreateBundle(NECKO_MSGS_URL, getter_AddRefs(stringBundle));
if (NS_FAILED(rv)) return rv;
nsXPIDLString messageString;
rv = stringBundle->GetStringFromName(NS_LITERAL_STRING("RepostFormData").get(), getter_Copies(messageString));
// GetStringFromName can return NS_OK and NULL messageString.
if (NS_SUCCEEDED(rv) && messageString) {
bool repost = false;
nsCOMPtr<nsIPrompt> prompt;
GetCallback(prompt);
if (!prompt)
return NS_ERROR_NO_INTERFACE;
prompt->Confirm(nullptr, messageString, &repost);
if (!repost)
return NS_ERROR_FAILURE;
}
return rv;
}
nsresult
nsHttpChannel::ProxyFailover()
{
LOG(("nsHttpChannel::ProxyFailover [this=%p]\n", this));
nsresult rv;
nsCOMPtr<nsIProtocolProxyService> pps =
do_GetService(NS_PROTOCOLPROXYSERVICE_CONTRACTID, &rv);
if (NS_FAILED(rv))
return rv;
nsCOMPtr<nsIProxyInfo> pi;
rv = pps->GetFailoverForProxy(mConnectionInfo->ProxyInfo(), mURI, mStatus,
getter_AddRefs(pi));
if (NS_FAILED(rv))
return rv;
// XXXbz so where does this codepath remove us from the loadgroup,
// exactly?
return AsyncDoReplaceWithProxy(pi);
}
void
nsHttpChannel::HandleAsyncRedirectChannelToHttps()
{
NS_PRECONDITION(!mCallOnResume, "How did that happen?");
if (mSuspendCount) {
LOG(("Waiting until resume to do async redirect to https [this=%p]\n", this));
mCallOnResume = &nsHttpChannel::HandleAsyncRedirectChannelToHttps;
return;
}
nsresult rv = AsyncRedirectChannelToHttps();
if (NS_FAILED(rv))
ContinueAsyncRedirectChannelToHttps(rv);
}
nsresult
nsHttpChannel::AsyncRedirectChannelToHttps()
{
nsresult rv = NS_OK;
LOG(("nsHttpChannel::HandleAsyncRedirectChannelToHttps() [STS]\n"));
nsCOMPtr<nsIChannel> newChannel;
nsCOMPtr<nsIURI> upgradedURI;
rv = mURI->Clone(getter_AddRefs(upgradedURI));
NS_ENSURE_SUCCESS(rv,rv);
upgradedURI->SetScheme(NS_LITERAL_CSTRING("https"));
int32_t oldPort = -1;
rv = mURI->GetPort(&oldPort);
if (NS_FAILED(rv)) return rv;
// Keep any nonstandard ports so only the scheme is changed.
// For example:
// http://foo.com:80 -> https://foo.com:443
// http://foo.com:81 -> https://foo.com:81
if (oldPort == 80 || oldPort == -1)
upgradedURI->SetPort(-1);
else
upgradedURI->SetPort(oldPort);
nsCOMPtr<nsIIOService> ioService;
rv = gHttpHandler->GetIOService(getter_AddRefs(ioService));
NS_ENSURE_SUCCESS(rv, rv);
rv = ioService->NewChannelFromURI(upgradedURI, getter_AddRefs(newChannel));
NS_ENSURE_SUCCESS(rv, rv);
rv = SetupReplacementChannel(upgradedURI, newChannel, true);
NS_ENSURE_SUCCESS(rv, rv);
// Inform consumers about this fake redirect
mRedirectChannel = newChannel;
uint32_t flags = nsIChannelEventSink::REDIRECT_PERMANENT;
PushRedirectAsyncFunc(
&nsHttpChannel::ContinueAsyncRedirectChannelToHttps);
rv = gHttpHandler->AsyncOnChannelRedirect(this, newChannel, flags);
if (NS_SUCCEEDED(rv))
rv = WaitForRedirectCallback();
if (NS_FAILED(rv)) {
AutoRedirectVetoNotifier notifier(this);
PopRedirectAsyncFunc(
&nsHttpChannel::ContinueAsyncRedirectChannelToHttps);
}
return rv;
}
nsresult
nsHttpChannel::ContinueAsyncRedirectChannelToHttps(nsresult rv)
{
if (NS_SUCCEEDED(rv))
rv = OpenRedirectChannel(rv);
if (NS_FAILED(rv)) {
// Fill the failure status here, the update to https had been vetoed
// but from the security reasons we have to discard the whole channel
// load.
mStatus = rv;
}
if (mLoadGroup)
mLoadGroup->RemoveRequest(this, nullptr, mStatus);
if (NS_FAILED(rv)) {
// We have to manually notify the listener because there is not any pump
// that would call our OnStart/StopRequest after resume from waiting for
// the redirect callback.
DoNotifyListener();
}
return rv;
}
nsresult
nsHttpChannel::OpenRedirectChannel(nsresult rv)
{
AutoRedirectVetoNotifier notifier(this);
// Make sure to do this _after_ calling OnChannelRedirect
mRedirectChannel->SetOriginalURI(mOriginalURI);
// And now, notify observers the deprecated way
nsCOMPtr<nsIHttpEventSink> httpEventSink;
GetCallback(httpEventSink);
if (httpEventSink) {
// NOTE: nsIHttpEventSink is only used for compatibility with pre-1.8
// versions.
rv = httpEventSink->OnRedirect(this, mRedirectChannel);
if (NS_FAILED(rv)) {
return rv;
}
}
// open new channel
rv = mRedirectChannel->AsyncOpen(mListener, mListenerContext);
if (NS_FAILED(rv)) {
return rv;
}
mStatus = NS_BINDING_REDIRECTED;
notifier.RedirectSucceeded();
ReleaseListeners();
return NS_OK;
}
nsresult
nsHttpChannel::AsyncDoReplaceWithProxy(nsIProxyInfo* pi)
{
LOG(("nsHttpChannel::AsyncDoReplaceWithProxy [this=%p pi=%p]", this, pi));
nsresult rv;
nsCOMPtr<nsIChannel> newChannel;
rv = gHttpHandler->NewProxiedChannel(mURI, pi, mProxyResolveFlags,
mProxyURI, getter_AddRefs(newChannel));
if (NS_FAILED(rv))
return rv;
rv = SetupReplacementChannel(mURI, newChannel, true);
if (NS_FAILED(rv))
return rv;
// Inform consumers about this fake redirect
mRedirectChannel = newChannel;
uint32_t flags = nsIChannelEventSink::REDIRECT_INTERNAL;
PushRedirectAsyncFunc(&nsHttpChannel::ContinueDoReplaceWithProxy);
rv = gHttpHandler->AsyncOnChannelRedirect(this, newChannel, flags);
if (NS_SUCCEEDED(rv))
rv = WaitForRedirectCallback();
if (NS_FAILED(rv)) {
AutoRedirectVetoNotifier notifier(this);
PopRedirectAsyncFunc(&nsHttpChannel::ContinueDoReplaceWithProxy);
}
return rv;
}
nsresult
nsHttpChannel::ContinueDoReplaceWithProxy(nsresult rv)
{
AutoRedirectVetoNotifier notifier(this);
if (NS_FAILED(rv))
return rv;
NS_PRECONDITION(mRedirectChannel, "No redirect channel?");
// Make sure to do this _after_ calling OnChannelRedirect
mRedirectChannel->SetOriginalURI(mOriginalURI);
// open new channel
rv = mRedirectChannel->AsyncOpen(mListener, mListenerContext);
if (NS_FAILED(rv))
return rv;
mStatus = NS_BINDING_REDIRECTED;
notifier.RedirectSucceeded();
ReleaseListeners();
return rv;
}
nsresult
nsHttpChannel::ResolveProxy()
{
LOG(("nsHttpChannel::ResolveProxy [this=%p]\n", this));
nsresult rv;
nsCOMPtr<nsIProtocolProxyService> pps =
do_GetService(NS_PROTOCOLPROXYSERVICE_CONTRACTID, &rv);
if (NS_FAILED(rv))
return rv;
return pps->AsyncResolve(mProxyURI ? mProxyURI : mURI, mProxyResolveFlags,
this, getter_AddRefs(mProxyRequest));
}
bool
HttpCacheQuery::ResponseWouldVary() const
{
AssertOnCacheThread();
nsresult rv;
nsAutoCString buf, metaKey;
mCachedResponseHead->GetHeader(nsHttp::Vary, buf);
if (!buf.IsEmpty()) {
NS_NAMED_LITERAL_CSTRING(prefix, "request-");
// enumerate the elements of the Vary header...
char *val = buf.BeginWriting(); // going to munge buf
char *token = nsCRT::strtok(val, NS_HTTP_HEADER_SEPS, &val);
while (token) {
LOG(("HttpCacheQuery::ResponseWouldVary [channel=%p] " \
"processing %s\n",
mChannel.get(), token));
//
// if "*", then assume response would vary. technically speaking,
// "Vary: header, *" is not permitted, but we allow it anyways.
//
// We hash values of cookie-headers for the following reasons:
//
// 1- cookies can be very large in size
//
// 2- cookies may contain sensitive information. (for parity with
// out policy of not storing Set-cookie headers in the cache
// meta data, we likewise do not want to store cookie headers
// here.)
//
if (*token == '*')
return true; // if we encounter this, just get out of here
// build cache meta data key...
metaKey = prefix + nsDependentCString(token);
// check the last value of the given request header to see if it has
// since changed. if so, then indeed the cached response is invalid.
nsXPIDLCString lastVal;
mCacheEntry->GetMetaDataElement(metaKey.get(), getter_Copies(lastVal));
LOG(("HttpCacheQuery::ResponseWouldVary [channel=%p] "
"stored value = \"%s\"\n",
mChannel.get(), lastVal.get()));
// Look for value of "Cookie" in the request headers
nsHttpAtom atom = nsHttp::ResolveAtom(token);
const char *newVal = mRequestHead.PeekHeader(atom);
if (!lastVal.IsEmpty()) {
// value for this header in cache, but no value in request
if (!newVal)
return true; // yes - response would vary
// If this is a cookie-header, stored metadata is not
// the value itself but the hash. So we also hash the
// outgoing value here in order to compare the hashes
nsAutoCString hash;
if (atom == nsHttp::Cookie) {
rv = Hash(newVal, hash);
// If hash failed, be conservative (the cached hash
// exists at this point) and claim response would vary
if (NS_FAILED(rv))
return true;
newVal = hash.get();
LOG(("HttpCacheQuery::ResponseWouldVary [this=%p] " \
"set-cookie value hashed to %s\n",
mChannel.get(), newVal));
}
if (strcmp(newVal, lastVal))
return true; // yes, response would vary
} else if (newVal) { // old value is empty, but newVal is set
return true;
}
// next token...
token = nsCRT::strtok(val, NS_HTTP_HEADER_SEPS, &val);
}
}
return false;
}
// We need to have an implementation of this function just so that we can keep
// all references to mCallOnResume of type nsHttpChannel: it's not OK in C++
// to set a member function ptr to a base class function.
void
nsHttpChannel::HandleAsyncAbort()
{
HttpAsyncAborter<nsHttpChannel>::HandleAsyncAbort();
}
nsresult
nsHttpChannel::EnsureAssocReq()
{
// Confirm Assoc-Req response header on pipelined transactions
// per draft-nottingham-http-pipeline-01.txt
// of the form: GET http://blah.com/foo/bar?qv
// return NS_OK as long as we don't find a violation
// (i.e. no header is ok, as are malformed headers, as are
// transactions that have not been pipelined (unless those have been
// opted in via pragma))
if (!mResponseHead)
return NS_OK;
const char *assoc_val = mResponseHead->PeekHeader(nsHttp::Assoc_Req);
if (!assoc_val)
return NS_OK;
if (!mTransaction || !mURI)
return NS_OK;
if (!mTransaction->PipelinePosition()) {
// "Pragma: X-Verify-Assoc-Req" can be used to verify even non pipelined
// transactions. It is used by test harness.
const char *pragma_val = mResponseHead->PeekHeader(nsHttp::Pragma);
if (!pragma_val ||
!nsHttp::FindToken(pragma_val, "X-Verify-Assoc-Req",
HTTP_HEADER_VALUE_SEPS))
return NS_OK;
}
char *method = net_FindCharNotInSet(assoc_val, HTTP_LWS);
if (!method)
return NS_OK;
bool equals;
char *endofmethod;
assoc_val = nullptr;
endofmethod = net_FindCharInSet(method, HTTP_LWS);
if (endofmethod)
assoc_val = net_FindCharNotInSet(endofmethod, HTTP_LWS);
if (!assoc_val)
return NS_OK;
// check the method
int32_t methodlen = PL_strlen(mRequestHead.Method().get());
if ((methodlen != (endofmethod - method)) ||
PL_strncmp(method,
mRequestHead.Method().get(),
endofmethod - method)) {
LOG((" Assoc-Req failure Method %s", method));
if (mConnectionInfo)
gHttpHandler->ConnMgr()->
PipelineFeedbackInfo(mConnectionInfo,
nsHttpConnectionMgr::RedCorruptedContent,
nullptr, 0);
nsCOMPtr<nsIConsoleService> consoleService =
do_GetService(NS_CONSOLESERVICE_CONTRACTID);
if (consoleService) {
nsAutoString message
(NS_LITERAL_STRING("Failed Assoc-Req. Received "));
AppendASCIItoUTF16(
mResponseHead->PeekHeader(nsHttp::Assoc_Req),
message);
message += NS_LITERAL_STRING(" expected method ");
AppendASCIItoUTF16(mRequestHead.Method().get(), message);
consoleService->LogStringMessage(message.get());
}
if (gHttpHandler->EnforceAssocReq())
return NS_ERROR_CORRUPTED_CONTENT;
return NS_OK;
}
// check the URL
nsCOMPtr<nsIURI> assoc_url;
if (NS_FAILED(NS_NewURI(getter_AddRefs(assoc_url), assoc_val)) ||
!assoc_url)
return NS_OK;
mURI->Equals(assoc_url, &equals);
if (!equals) {
LOG((" Assoc-Req failure URL %s", assoc_val));
if (mConnectionInfo)
gHttpHandler->ConnMgr()->
PipelineFeedbackInfo(mConnectionInfo,
nsHttpConnectionMgr::RedCorruptedContent,
nullptr, 0);
nsCOMPtr<nsIConsoleService> consoleService =
do_GetService(NS_CONSOLESERVICE_CONTRACTID);
if (consoleService) {
nsAutoString message
(NS_LITERAL_STRING("Failed Assoc-Req. Received "));
AppendASCIItoUTF16(
mResponseHead->PeekHeader(nsHttp::Assoc_Req),
message);
message += NS_LITERAL_STRING(" expected URL ");
AppendASCIItoUTF16(mSpec.get(), message);
consoleService->LogStringMessage(message.get());
}
if (gHttpHandler->EnforceAssocReq())
return NS_ERROR_CORRUPTED_CONTENT;
}
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsHttpChannel <byte-range>
//-----------------------------------------------------------------------------
nsresult
HttpCacheQuery::SetupByteRangeRequest(uint32_t partialLen)
{
AssertOnCacheThread();
// cached content has been found to be partial, add necessary request
// headers to complete cache entry.
// use strongest validator available...
const char *val = mCachedResponseHead->PeekHeader(nsHttp::ETag);
if (!val)
val = mCachedResponseHead->PeekHeader(nsHttp::Last_Modified);
if (!val) {
// if we hit this code it means mCachedResponseHead->IsResumable() is
// either broken or not being called.
NS_NOTREACHED("no cache validator");
return NS_ERROR_FAILURE;
}
char buf[32];
PR_snprintf(buf, sizeof(buf), "bytes=%u-", partialLen);
mRequestHead.SetHeader(nsHttp::Range, nsDependentCString(buf));
mRequestHead.SetHeader(nsHttp::If_Range, nsDependentCString(val));
return NS_OK;
}
nsresult
nsHttpChannel::ProcessPartialContent()
{
// ok, we've just received a 206
//
// we need to stream whatever data is in the cache out first, and then
// pick up whatever data is on the wire, writing it into the cache.
LOG(("nsHttpChannel::ProcessPartialContent [this=%p]\n", this));
NS_ENSURE_TRUE(mCachedResponseHead, NS_ERROR_NOT_INITIALIZED);
NS_ENSURE_TRUE(mCacheEntry, NS_ERROR_NOT_INITIALIZED);
// Make sure to clear bogus content-encodings before looking at the header
ClearBogusContentEncodingIfNeeded();
// Check if the content-encoding we now got is different from the one we
// got before
if (PL_strcasecmp(mResponseHead->PeekHeader(nsHttp::Content_Encoding),
mCachedResponseHead->PeekHeader(nsHttp::Content_Encoding))
!= 0) {
Cancel(NS_ERROR_INVALID_CONTENT_ENCODING);
return CallOnStartRequest();
}
// suspend the current transaction
nsresult rv = mTransactionPump->Suspend();
if (NS_FAILED(rv)) return rv;
// merge any new headers with the cached response headers
rv = mCachedResponseHead->UpdateHeaders(mResponseHead->Headers());
if (NS_FAILED(rv)) return rv;
// update the cached response head
nsAutoCString head;
mCachedResponseHead->Flatten(head, true);
rv = mCacheEntry->SetMetaDataElement("response-head", head.get());
if (NS_FAILED(rv)) return rv;
// make the cached response be the current response
mResponseHead = mCachedResponseHead;
UpdateInhibitPersistentCachingFlag();
rv = UpdateExpirationTime();
if (NS_FAILED(rv)) return rv;
// notify observers interested in looking at a response that has been
// merged with any cached headers (http-on-examine-merged-response).
gHttpHandler->OnExamineMergedResponse(this);
// the cached content is valid, although incomplete.
mCachedContentIsValid = true;
return ReadFromCache(false);
}
nsresult
nsHttpChannel::OnDoneReadingPartialCacheEntry(bool *streamDone)
{
nsresult rv;
LOG(("nsHttpChannel::OnDoneReadingPartialCacheEntry [this=%p]", this));
// by default, assume we would have streamed all data or failed...
*streamDone = true;
// setup cache listener to append to cache entry
uint32_t size;
rv = mCacheEntry->GetDataSize(&size);
if (NS_FAILED(rv)) return rv;
rv = InstallCacheListener(size);
if (NS_FAILED(rv)) return rv;
// need to track the logical offset of the data being sent to our listener
mLogicalOffset = size;
// we're now completing the cached content, so we can clear this flag.
// this puts us in the state of a regular download.
mCachedContentIsPartial = false;
// resume the transaction if it exists, otherwise the pipe contained the
// remaining part of the document and we've now streamed all of the data.
if (mTransactionPump) {
rv = mTransactionPump->Resume();
if (NS_SUCCEEDED(rv))
*streamDone = false;
}
else
NS_NOTREACHED("no transaction");
return rv;
}
//-----------------------------------------------------------------------------
// nsHttpChannel <cache>
//-----------------------------------------------------------------------------
nsresult
nsHttpChannel::ProcessNotModified()
{
nsresult rv;
LOG(("nsHttpChannel::ProcessNotModified [this=%p]\n", this));
if (mCustomConditionalRequest) {
LOG(("Bypassing ProcessNotModified due to custom conditional headers"));
return NS_ERROR_FAILURE;
}
if (!mDidReval) {
LOG(("Server returned a 304 response even though we did not send a "
"conditional request"));
return NS_ERROR_FAILURE;
}
MOZ_ASSERT(mCachedResponseHead);
MOZ_ASSERT(mCacheEntry);
NS_ENSURE_TRUE(mCachedResponseHead && mCacheEntry, NS_ERROR_UNEXPECTED);
// If the 304 response contains a Last-Modified different than the
// one in our cache that is pretty suspicious and is, in at least the
// case of bug 716840, a sign of the server having previously corrupted
// our cache with a bad response. Take the minor step here of just dooming
// that cache entry so there is a fighting chance of getting things on the
// right track as well as disabling pipelining for that host.
nsAutoCString lastModifiedCached;
nsAutoCString lastModified304;
rv = mCachedResponseHead->GetHeader(nsHttp::Last_Modified,
lastModifiedCached);
if (NS_SUCCEEDED(rv)) {
rv = mResponseHead->GetHeader(nsHttp::Last_Modified,
lastModified304);
}
if (NS_SUCCEEDED(rv) && !lastModified304.Equals(lastModifiedCached)) {
LOG(("Cache Entry and 304 Last-Modified Headers Do Not Match "
"[%s] and [%s]\n",
lastModifiedCached.get(), lastModified304.get()));
mCacheEntry->AsyncDoom(nullptr);
if (mConnectionInfo)
gHttpHandler->ConnMgr()->
PipelineFeedbackInfo(mConnectionInfo,
nsHttpConnectionMgr::RedCorruptedContent,
nullptr, 0);
Telemetry::Accumulate(Telemetry::CACHE_LM_INCONSISTENT, true);
}
// merge any new headers with the cached response headers
rv = mCachedResponseHead->UpdateHeaders(mResponseHead->Headers());
if (NS_FAILED(rv)) return rv;
// update the cached response head
nsAutoCString head;
mCachedResponseHead->Flatten(head, true);
rv = mCacheEntry->SetMetaDataElement("response-head", head.get());
if (NS_FAILED(rv)) return rv;
// make the cached response be the current response
mResponseHead = mCachedResponseHead;
UpdateInhibitPersistentCachingFlag();
rv = UpdateExpirationTime();
if (NS_FAILED(rv)) return rv;
rv = AddCacheEntryHeaders(mCacheEntry);
if (NS_FAILED(rv)) return rv;
// notify observers interested in looking at a reponse that has been
// merged with any cached headers
gHttpHandler->OnExamineMergedResponse(this);
mCachedContentIsValid = true;
rv = ReadFromCache(false);
if (NS_FAILED(rv)) return rv;
mTransactionReplaced = true;
return NS_OK;
}
nsresult
nsHttpChannel::ProcessFallback(bool *waitingForRedirectCallback)
{
LOG(("nsHttpChannel::ProcessFallback [this=%p]\n", this));
nsresult rv;
*waitingForRedirectCallback = false;
mFallingBack = false;
// At this point a load has failed (either due to network problems
// or an error returned on the server). Perform an application
// cache fallback if we have a URI to fall back to.
if (!mApplicationCache || mFallbackKey.IsEmpty() || mFallbackChannel) {
LOG((" choosing not to fallback [%p,%s,%d]",
mApplicationCache.get(), mFallbackKey.get(), mFallbackChannel));
return NS_OK;
}
// Make sure the fallback entry hasn't been marked as a foreign
// entry.
uint32_t fallbackEntryType;
rv = mApplicationCache->GetTypes(mFallbackKey, &fallbackEntryType);
NS_ENSURE_SUCCESS(rv, rv);
if (fallbackEntryType & nsIApplicationCache::ITEM_FOREIGN) {
// This cache points to a fallback that refers to a different
// manifest. Refuse to fall back.
return NS_OK;
}
NS_ASSERTION(fallbackEntryType & nsIApplicationCache::ITEM_FALLBACK,
"Fallback entry not marked correctly!");
// Kill any offline cache entry, and disable offline caching for the
// fallback.
if (mOfflineCacheEntry) {
mOfflineCacheEntry->AsyncDoom(nullptr);
mOfflineCacheEntry = 0;
mOfflineCacheAccess = 0;
}
mApplicationCacheForWrite = nullptr;
mOfflineCacheEntry = 0;
mOfflineCacheAccess = 0;
// Close the current cache entry.
CloseCacheEntry(true);
// Create a new channel to load the fallback entry.
nsRefPtr<nsIChannel> newChannel;
rv = gHttpHandler->NewChannel(mURI, getter_AddRefs(newChannel));
NS_ENSURE_SUCCESS(rv, rv);
rv = SetupReplacementChannel(mURI, newChannel, true);
NS_ENSURE_SUCCESS(rv, rv);
// Make sure the new channel loads from the fallback key.
nsCOMPtr<nsIHttpChannelInternal> httpInternal =
do_QueryInterface(newChannel, &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = httpInternal->SetupFallbackChannel(mFallbackKey.get());
NS_ENSURE_SUCCESS(rv, rv);
// ... and fallbacks should only load from the cache.
uint32_t newLoadFlags = mLoadFlags | LOAD_REPLACE | LOAD_ONLY_FROM_CACHE;
rv = newChannel->SetLoadFlags(newLoadFlags);
// Inform consumers about this fake redirect
mRedirectChannel = newChannel;
uint32_t redirectFlags = nsIChannelEventSink::REDIRECT_INTERNAL;
PushRedirectAsyncFunc(&nsHttpChannel::ContinueProcessFallback);
rv = gHttpHandler->AsyncOnChannelRedirect(this, newChannel, redirectFlags);
if (NS_SUCCEEDED(rv))
rv = WaitForRedirectCallback();
if (NS_FAILED(rv)) {
AutoRedirectVetoNotifier notifier(this);
PopRedirectAsyncFunc(&nsHttpChannel::ContinueProcessFallback);
return rv;
}
// Indicate we are now waiting for the asynchronous redirect callback
// if all went OK.
*waitingForRedirectCallback = true;
return NS_OK;
}
nsresult
nsHttpChannel::ContinueProcessFallback(nsresult rv)
{
AutoRedirectVetoNotifier notifier(this);
if (NS_FAILED(rv))
return rv;
NS_PRECONDITION(mRedirectChannel, "No redirect channel?");
// Make sure to do this _after_ calling OnChannelRedirect
mRedirectChannel->SetOriginalURI(mOriginalURI);
rv = mRedirectChannel->AsyncOpen(mListener, mListenerContext);
if (NS_FAILED(rv))
return rv;
// close down this channel
Cancel(NS_BINDING_REDIRECTED);
notifier.RedirectSucceeded();
ReleaseListeners();
mFallingBack = true;
return NS_OK;
}
// Determines if a request is a byte range request for a subrange,
// i.e. is a byte range request, but not a 0- byte range request.
static bool
IsSubRangeRequest(nsHttpRequestHead &aRequestHead)
{
if (!aRequestHead.PeekHeader(nsHttp::Range))
return false;
nsAutoCString byteRange;
aRequestHead.GetHeader(nsHttp::Range, byteRange);
return !byteRange.EqualsLiteral("bytes=0-");
}
nsresult
nsHttpChannel::OpenCacheEntry(bool usingSSL)
{
nsresult rv;
NS_ASSERTION(!mOnCacheEntryAvailableCallback, "Unexpected state");
mLoadedFromApplicationCache = false;
LOG(("nsHttpChannel::OpenCacheEntry [this=%p]", this));
// make sure we're not abusing this function
NS_PRECONDITION(!mCacheEntry, "cache entry already open");
nsAutoCString cacheKey;
if (mRequestHead.Method() == nsHttp::Post) {
// If the post id is already set then this is an attempt to replay
// a post transaction via the cache. Otherwise, we need a unique
// post id for this transaction.
if (mPostID == 0)
mPostID = gHttpHandler->GenerateUniqueID();
}
else if ((mRequestHead.Method() != nsHttp::Get) &&
(mRequestHead.Method() != nsHttp::Head)) {
// don't use the cache for other types of requests
return NS_OK;
}
if (mResuming) {
// We don't support caching for requests initiated
// via nsIResumableChannel.
return NS_OK;
}
// Don't cache byte range requests which are subranges, only cache 0-
// byte range requests.
if (IsSubRangeRequest(mRequestHead))
return NS_OK;
GenerateCacheKey(mPostID, cacheKey);
// Set the desired cache access mode accordingly...
nsCacheAccessMode accessRequested;
rv = DetermineCacheAccess(&accessRequested);
if (NS_FAILED(rv)) return rv;
if (!mApplicationCache && mInheritApplicationCache) {
// Pick up an application cache from the notification
// callbacks if available
nsCOMPtr<nsIApplicationCacheContainer> appCacheContainer;
GetCallback(appCacheContainer);
if (appCacheContainer) {
appCacheContainer->GetApplicationCache(getter_AddRefs(mApplicationCache));
}
}
if (!mApplicationCache &&
(mChooseApplicationCache || (mLoadFlags & LOAD_CHECK_OFFLINE_CACHE))) {
// We're supposed to load from an application cache, but
// one was not supplied by the load group. Ask the
// application cache service to choose one for us.
nsCOMPtr<nsIApplicationCacheService> appCacheService =
do_GetService(NS_APPLICATIONCACHESERVICE_CONTRACTID);
if (appCacheService) {
nsCOMPtr<nsILoadContext> loadContext;
GetCallback(loadContext);
if (!loadContext)
LOG((" no load context while choosing application cache"));
nsresult rv = appCacheService->ChooseApplicationCache
(cacheKey, loadContext, getter_AddRefs(mApplicationCache));
NS_ENSURE_SUCCESS(rv, rv);
}
}
nsCOMPtr<nsICacheSession> session;
// If we have an application cache, we check it first.
if (mApplicationCache) {
nsAutoCString appCacheClientID;
rv = mApplicationCache->GetClientID(appCacheClientID);
if (NS_SUCCEEDED(rv)) {
// We open with ACCESS_READ only, because we don't want to overwrite
// the offline cache entry non-atomically. ACCESS_READ will prevent
// us from writing to the offline cache as a normal cache entry.
mCacheQuery = new HttpCacheQuery(
this, appCacheClientID,
nsICache::STORE_OFFLINE, mPrivateBrowsing,
cacheKey, nsICache::ACCESS_READ,
mLoadFlags & LOAD_BYPASS_LOCAL_CACHE_IF_BUSY,
usingSSL, true);
mOnCacheEntryAvailableCallback =
&nsHttpChannel::OnOfflineCacheEntryAvailable;
rv = mCacheQuery->Dispatch();
if (NS_SUCCEEDED(rv))
return NS_OK;
mCacheQuery = nullptr;
mOnCacheEntryAvailableCallback = nullptr;
}
// opening cache entry failed
return OnOfflineCacheEntryAvailable(nullptr, nsICache::ACCESS_NONE, rv);
}
return OpenNormalCacheEntry(usingSSL);
}
nsresult
nsHttpChannel::OnOfflineCacheEntryAvailable(nsICacheEntryDescriptor *aEntry,
nsCacheAccessMode aAccess,
nsresult aEntryStatus)
{
nsresult rv;
if (NS_SUCCEEDED(aEntryStatus)) {
// We successfully opened an offline cache session and the entry,
// so indicate we will load from the offline cache.
mLoadedFromApplicationCache = true;
mCacheEntry = aEntry;
mCacheAccess = aAccess;
}
// XXX: shouldn't we fail here? I thought we're supposed to fail the
// connection if we can't open an offline cache entry for writing.
if (aEntryStatus == NS_ERROR_CACHE_WAIT_FOR_VALIDATION) {
LOG(("bypassing local cache since it is busy\n"));
// Don't try to load normal cache entry
return NS_ERROR_NOT_AVAILABLE;
}
if (mCanceled && NS_FAILED(mStatus)) {
LOG(("channel was canceled [this=%p status=%x]\n", this, mStatus));
return mStatus;
}
if (NS_SUCCEEDED(aEntryStatus))
return NS_OK;
if (!mApplicationCacheForWrite && !mFallbackChannel) {
nsAutoCString cacheKey;
GenerateCacheKey(mPostID, cacheKey);
// Check for namespace match.
nsCOMPtr<nsIApplicationCacheNamespace> namespaceEntry;
rv = mApplicationCache->GetMatchingNamespace
(cacheKey, getter_AddRefs(namespaceEntry));
NS_ENSURE_SUCCESS(rv, rv);
uint32_t namespaceType = 0;
if (!namespaceEntry ||
NS_FAILED(namespaceEntry->GetItemType(&namespaceType)) ||
(namespaceType &
(nsIApplicationCacheNamespace::NAMESPACE_FALLBACK |
nsIApplicationCacheNamespace::NAMESPACE_BYPASS)) == 0) {
// When loading from an application cache, only items
// on the whitelist or matching a
// fallback namespace should hit the network...
mLoadFlags |= LOAD_ONLY_FROM_CACHE;
// ... and if there were an application cache entry,
// we would have found it earlier.
return NS_ERROR_CACHE_KEY_NOT_FOUND;
}
if (namespaceType &
nsIApplicationCacheNamespace::NAMESPACE_FALLBACK) {
rv = namespaceEntry->GetData(mFallbackKey);
NS_ENSURE_SUCCESS(rv, rv);
}
}
bool usingSSL = false;
(void) mURI->SchemeIs("https", &usingSSL);
return OpenNormalCacheEntry(usingSSL);
}
nsresult
nsHttpChannel::OpenNormalCacheEntry(bool usingSSL)
{
NS_ASSERTION(!mCacheEntry, "We have already mCacheEntry");
nsresult rv;
nsCacheStoragePolicy storagePolicy = DetermineStoragePolicy();
nsDependentCString clientID(
GetCacheSessionNameForStoragePolicy(storagePolicy, mPrivateBrowsing));
nsAutoCString cacheKey;
GenerateCacheKey(mPostID, cacheKey);
nsCacheAccessMode accessRequested;
rv = DetermineCacheAccess(&accessRequested);
if (NS_FAILED(rv))
return rv;
mCacheQuery = new HttpCacheQuery(
this, clientID, storagePolicy,
mPrivateBrowsing, cacheKey, accessRequested,
mLoadFlags & LOAD_BYPASS_LOCAL_CACHE_IF_BUSY,
usingSSL, false);
mOnCacheEntryAvailableCallback =
&nsHttpChannel::OnNormalCacheEntryAvailable;
rv = mCacheQuery->Dispatch();
if (NS_SUCCEEDED(rv))
return NS_OK;
mCacheQuery = nullptr;
mOnCacheEntryAvailableCallback = nullptr;
return rv;
}
nsresult
nsHttpChannel::OnNormalCacheEntryAvailable(nsICacheEntryDescriptor *aEntry,
nsCacheAccessMode aAccess,
nsresult aEntryStatus)
{
if (NS_SUCCEEDED(aEntryStatus)) {
mCacheEntry = aEntry;
mCacheAccess = aAccess;
}
if (aEntryStatus == NS_ERROR_CACHE_WAIT_FOR_VALIDATION) {
LOG(("bypassing local cache since it is busy\n"));
}
if (mCanceled && NS_FAILED(mStatus)) {
LOG(("channel was canceled [this=%p status=%x]\n", this, mStatus));
return mStatus;
}
if ((mLoadFlags & LOAD_ONLY_FROM_CACHE) && NS_FAILED(aEntryStatus))
// if this channel is only allowed to pull from the cache, then
// we must fail if we were unable to open a cache entry.
return NS_ERROR_DOCUMENT_NOT_CACHED;
// advance to the next state...
return NS_OK;
}
nsresult
nsHttpChannel::OpenOfflineCacheEntryForWriting()
{
nsresult rv;
LOG(("nsHttpChannel::OpenOfflineCacheEntryForWriting [this=%p]", this));
// make sure we're not abusing this function
NS_PRECONDITION(!mOfflineCacheEntry, "cache entry already open");
bool offline = gIOService->IsOffline();
if (offline) {
// only put things in the offline cache while online
return NS_OK;
}
if (mLoadFlags & INHIBIT_CACHING) {
// respect demand not to cache
return NS_OK;
}
if (mRequestHead.Method() != nsHttp::Get) {
// only cache complete documents offline
return NS_OK;
}
// Don't cache byte range requests which are subranges, only cache 0-
// byte range requests.
if (IsSubRangeRequest(mRequestHead))
return NS_OK;
nsAutoCString cacheKey;
GenerateCacheKey(mPostID, cacheKey);
NS_ENSURE_TRUE(mApplicationCacheForWrite,
NS_ERROR_NOT_AVAILABLE);
nsAutoCString offlineCacheClientID;
rv = mApplicationCacheForWrite->GetClientID(offlineCacheClientID);
NS_ENSURE_SUCCESS(rv, rv);
NS_ENSURE_TRUE(!offlineCacheClientID.IsEmpty(),
NS_ERROR_NOT_AVAILABLE);
nsCOMPtr<nsICacheSession> session;
nsCOMPtr<nsICacheService> serv =
do_GetService(NS_CACHESERVICE_CONTRACTID, &rv);
if (NS_FAILED(rv)) return rv;
rv = serv->CreateSession(offlineCacheClientID.get(),
nsICache::STORE_OFFLINE,
nsICache::STREAM_BASED,
getter_AddRefs(session));
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsIFile> profileDirectory;
rv = mApplicationCacheForWrite->GetProfileDirectory(
getter_AddRefs(profileDirectory));
NS_ENSURE_SUCCESS(rv, rv);
if (profileDirectory) {
rv = session->SetProfileDirectory(profileDirectory);
if (NS_FAILED(rv)) return rv;
}
mOnCacheEntryAvailableCallback =
&nsHttpChannel::OnOfflineCacheEntryForWritingAvailable;
rv = session->AsyncOpenCacheEntry(cacheKey, nsICache::ACCESS_READ_WRITE,
this, true);
if (NS_SUCCEEDED(rv))
return NS_OK;
mOnCacheEntryAvailableCallback = nullptr;
return rv;
}
nsresult
nsHttpChannel::OnOfflineCacheEntryForWritingAvailable(
nsICacheEntryDescriptor *aEntry,
nsCacheAccessMode aAccess,
nsresult aEntryStatus)
{
if (NS_SUCCEEDED(aEntryStatus)) {
mOfflineCacheEntry = aEntry;
mOfflineCacheAccess = aAccess;
if (NS_FAILED(aEntry->GetLastModified(&mOfflineCacheLastModifiedTime))) {
mOfflineCacheLastModifiedTime = 0;
}
}
if (aEntryStatus == NS_ERROR_CACHE_WAIT_FOR_VALIDATION) {
// access to the cache entry has been denied (because the cache entry
// is probably in use by another channel). Either the cache is being
// read from (we're offline) or it's being updated elsewhere.
aEntryStatus = NS_OK;
}
if (mCanceled && NS_FAILED(mStatus)) {
LOG(("channel was canceled [this=%p status=%x]\n", this, mStatus));
return mStatus;
}
// advance to the next state...
return aEntryStatus;
}
// Generates the proper cache-key for this instance of nsHttpChannel
nsresult
nsHttpChannel::GenerateCacheKey(uint32_t postID, nsACString &cacheKey)
{
AssembleCacheKey(mFallbackChannel ? mFallbackKey.get() : mSpec.get(),
postID, cacheKey);
return NS_OK;
}
// Assembles a cache-key from the given pieces of information and |mLoadFlags|
void
nsHttpChannel::AssembleCacheKey(const char *spec, uint32_t postID,
nsACString &cacheKey)
{
cacheKey.Truncate();
if (mLoadFlags & LOAD_ANONYMOUS) {
cacheKey.AssignLiteral("anon&");
}
if (postID) {
char buf[32];
PR_snprintf(buf, sizeof(buf), "id=%x&", postID);
cacheKey.Append(buf);
}
if (!cacheKey.IsEmpty()) {
cacheKey.AppendLiteral("uri=");
}
// Strip any trailing #ref from the URL before using it as the key
const char *p = strchr(spec, '#');
if (p)
cacheKey.Append(spec, p - spec);
else
cacheKey.Append(spec);
}
// UpdateExpirationTime is called when a new response comes in from the server.
// It updates the stored response-time and sets the expiration time on the
// cache entry.
//
// From section 13.2.4 of RFC2616, we compute expiration time as follows:
//
// timeRemaining = freshnessLifetime - currentAge
// expirationTime = now + timeRemaining
//
nsresult
nsHttpChannel::UpdateExpirationTime()
{
NS_ENSURE_TRUE(mResponseHead, NS_ERROR_FAILURE);
nsresult rv;
uint32_t expirationTime = 0;
if (!mResponseHead->MustValidate()) {
uint32_t freshnessLifetime = 0;
rv = mResponseHead->ComputeFreshnessLifetime(&freshnessLifetime);
if (NS_FAILED(rv)) return rv;
if (freshnessLifetime > 0) {
uint32_t now = NowInSeconds(), currentAge = 0;
rv = mResponseHead->ComputeCurrentAge(now, mRequestTime, &currentAge);
if (NS_FAILED(rv)) return rv;
LOG(("freshnessLifetime = %u, currentAge = %u\n",
freshnessLifetime, currentAge));
if (freshnessLifetime > currentAge) {
uint32_t timeRemaining = freshnessLifetime - currentAge;
// be careful... now + timeRemaining may overflow
if (now + timeRemaining < now)
expirationTime = uint32_t(-1);
else
expirationTime = now + timeRemaining;
}
else
expirationTime = now;
}
}
rv = mCacheEntry->SetExpirationTime(expirationTime);
NS_ENSURE_SUCCESS(rv, rv);
if (mOfflineCacheEntry) {
rv = mOfflineCacheEntry->SetExpirationTime(expirationTime);
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
NS_IMETHODIMP
HttpCacheQuery::OnCacheEntryDoomed(nsresult)
{
return NS_ERROR_UNEXPECTED;
}
nsresult
HttpCacheQuery::Dispatch()
{
MOZ_ASSERT(NS_IsMainThread());
nsresult rv;
// XXX: Start the cache service; otherwise DispatchToCacheIOThread will
// fail.
nsCOMPtr<nsICacheService> service =
do_GetService(NS_CACHESERVICE_CONTRACTID, &rv);
// Ensure the stream transport service gets initialized on the main thread
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIStreamTransportService> sts =
do_GetService(kStreamTransportServiceCID, &rv);
}
if (NS_SUCCEEDED(rv)) {
rv = service->GetCacheIOTarget(getter_AddRefs(mCacheThread));
}
if (NS_SUCCEEDED(rv)) {
rv = mCacheThread->Dispatch(this, NS_DISPATCH_NORMAL);
}
return rv;
}
NS_IMETHODIMP
HttpCacheQuery::Run()
{
nsresult rv;
if (!NS_IsMainThread()) {
AssertOnCacheThread();
nsCOMPtr<nsICacheService> serv =
do_GetService(NS_CACHESERVICE_CONTRACTID, &rv);
nsCOMPtr<nsICacheSession> session;
if (NS_SUCCEEDED(rv)) {
rv = serv->CreateSession(mClientID.get(), mStoragePolicy,
nsICache::STREAM_BASED,
getter_AddRefs(session));
}
if (NS_SUCCEEDED(rv)) {
rv = session->SetIsPrivate(mUsingPrivateBrowsing);
}
if (NS_SUCCEEDED(rv)) {
rv = session->SetDoomEntriesIfExpired(false);
}
if (NS_SUCCEEDED(rv)) {
// AsyncOpenCacheEntry isn't really async when its called on the
// cache service thread.
rv = session->AsyncOpenCacheEntry(mCacheKey, mAccessToRequest, this,
mNoWait);
}
if (NS_FAILED(rv)) {
LOG(("Failed to open cache entry -- calling OnCacheEntryAvailable "
"directly."));
rv = OnCacheEntryAvailable(nullptr, 0, rv);
}
} else {
// break cycles
nsCOMPtr<nsICacheListener> channel = mChannel.forget();
mCacheThread = nullptr;
nsCOMPtr<nsICacheEntryDescriptor> entry = mCacheEntry.forget();
rv = channel->OnCacheEntryAvailable(entry, mCacheAccess, mStatus);
}
return rv;
}
NS_IMETHODIMP
HttpCacheQuery::OnCacheEntryAvailable(nsICacheEntryDescriptor *entry,
nsCacheAccessMode access,
nsresult status)
{
LOG(("HttpCacheQuery::OnCacheEntryAvailable [channel=%p entry=%p "
"access=%x status=%x, mRunConut=%d]\n", mChannel.get(), entry, access,
status, int(mRunCount)));
// XXX Bug 759805: Sometimes we will call this method directly from
// HttpCacheQuery::Run when AsyncOpenCacheEntry fails, but
// AsyncOpenCacheEntry will also call this method. As a workaround, we just
// ensure we only execute this code once.
NS_ENSURE_TRUE(mRunCount == 0, NS_ERROR_UNEXPECTED);
++mRunCount;
AssertOnCacheThread();
mCacheEntry = entry;
mCacheAccess = access;
mStatus = status;
if (mCacheEntry) {
char* cacheDeviceID = nullptr;
mCacheEntry->GetDeviceID(&cacheDeviceID);
if (cacheDeviceID) {
if (!strcmp(cacheDeviceID, kDiskDeviceID)) {
mCacheEntryDeviceTelemetryID
= Telemetry::HTTP_DISK_CACHE_DISPOSITION_2;
} else if (!strcmp(cacheDeviceID, kMemoryDeviceID)) {
mCacheEntryDeviceTelemetryID
= Telemetry::HTTP_MEMORY_CACHE_DISPOSITION_2;
} else if (!strcmp(cacheDeviceID, kOfflineDeviceID)) {
mCacheEntryDeviceTelemetryID
= Telemetry::HTTP_OFFLINE_CACHE_DISPOSITION_2;
} else {
MOZ_NOT_REACHED("unknown cache device ID");
}
delete cacheDeviceID;
} else {
// If we can read from the entry, it must have a device, but
// sometimes we don't (Bug 769497).
// MOZ_ASSERT(!(mCacheAccess & nsICache::ACCESS_READ));
}
}
nsresult rv = CheckCache();
if (NS_FAILED(rv))
NS_WARNING("cache check failed");
rv = NS_DispatchToMainThread(this);
return rv;
}
nsresult
HttpCacheQuery::CheckCache()
{
AssertOnCacheThread();
nsresult rv = NS_OK;
LOG(("HttpCacheQuery::CheckCache enter [channel=%p entry=%p access=%d]",
mChannel.get(), mCacheEntry.get(), mCacheAccess));
// Remember the request is a custom conditional request so that we can
// process any 304 response correctly.
mCustomConditionalRequest =
mRequestHead.PeekHeader(nsHttp::If_Modified_Since) ||
mRequestHead.PeekHeader(nsHttp::If_None_Match) ||
mRequestHead.PeekHeader(nsHttp::If_Unmodified_Since) ||
mRequestHead.PeekHeader(nsHttp::If_Match) ||
mRequestHead.PeekHeader(nsHttp::If_Range);
// Be pessimistic: assume the cache entry has no useful data.
mCachedContentIsValid = false;
// Don't proceed unless we have opened a cache entry for reading.
if (!mCacheEntry || !(mCacheAccess & nsICache::ACCESS_READ))
return NS_OK;
nsXPIDLCString buf;
// Get the method that was used to generate the cached response
rv = mCacheEntry->GetMetaDataElement("request-method", getter_Copies(buf));
NS_ENSURE_SUCCESS(rv, rv);
nsHttpAtom method = nsHttp::ResolveAtom(buf);
if (method == nsHttp::Head) {
// The cached response does not contain an entity. We can only reuse
// the response if the current request is also HEAD.
if (mRequestHead.Method() != nsHttp::Head)
return NS_OK;
}
buf.Adopt(0);
// We'll need this value in later computations...
uint32_t lastModifiedTime;
rv = mCacheEntry->GetLastModified(&lastModifiedTime);
NS_ENSURE_SUCCESS(rv, rv);
// Determine if this is the first time that this cache entry
// has been accessed during this session.
bool fromPreviousSession =
(gHttpHandler->SessionStartTime() > lastModifiedTime);
// Get the cached HTTP response headers
rv = mCacheEntry->GetMetaDataElement("response-head", getter_Copies(buf));
NS_ENSURE_SUCCESS(rv, rv);
// Parse the cached HTTP response headers
mCachedResponseHead = new nsHttpResponseHead();
rv = mCachedResponseHead->Parse((char *) buf.get());
NS_ENSURE_SUCCESS(rv, rv);
buf.Adopt(0);
bool isCachedRedirect = WillRedirect(mCachedResponseHead);
// Do not return 304 responses from the cache, and also do not return
// any other non-redirect 3xx responses from the cache (see bug 759043).
NS_ENSURE_TRUE((mCachedResponseHead->Status() / 100 != 3) ||
isCachedRedirect, NS_ERROR_ABORT);
// Don't bother to validate items that are read-only,
// unless they are read-only because of INHIBIT_CACHING or because
// we're updating the offline cache.
// Don't bother to validate if this is a fallback entry.
if (!mCacheForOfflineUse &&
(mLoadedFromApplicationCache ||
(mCacheAccess == nsICache::ACCESS_READ &&
!(mLoadFlags & nsIRequest::INHIBIT_CACHING)) ||
mFallbackChannel)) {
rv = OpenCacheInputStream(true);
if (NS_SUCCEEDED(rv)) {
mCachedContentIsValid = true;
// XXX: Isn't the cache entry already valid?
MaybeMarkCacheEntryValid(this, mCacheEntry, mCacheAccess);
}
return rv;
}
if (method != nsHttp::Head && !isCachedRedirect) {
// If the cached content-length is set and it does not match the data
// size of the cached content, then the cached response is partial...
// either we need to issue a byte range request or we need to refetch
// the entire document.
//
// We exclude redirects from this check because we (usually) strip the
// entity when we store the cache entry, and even if we didn't, we
// always ignore a cached redirect's entity anyway. See bug 759043.
int64_t contentLength = mCachedResponseHead->ContentLength();
if (contentLength != int64_t(-1)) {
uint32_t size;
rv = mCacheEntry->GetDataSize(&size);
NS_ENSURE_SUCCESS(rv, rv);
if (int64_t(size) != contentLength) {
LOG(("Cached data size does not match the Content-Length header "
"[content-length=%lld size=%u]\n", int64_t(contentLength), size));
bool hasContentEncoding =
mCachedResponseHead->PeekHeader(nsHttp::Content_Encoding)
!= nullptr;
if ((int64_t(size) < contentLength) &&
size > 0 &&
!hasContentEncoding &&
mCachedResponseHead->IsResumable() &&
!mCustomConditionalRequest &&
!mCachedResponseHead->NoStore()) {
// looks like a partial entry we can reuse; add If-Range
// and Range headers.
rv = SetupByteRangeRequest(size);
mCachedContentIsPartial = NS_SUCCEEDED(rv);
if (mCachedContentIsPartial) {
rv = OpenCacheInputStream(false);
} else {
// Make the request unconditional again.
mRequestHead.ClearHeader(nsHttp::Range);
mRequestHead.ClearHeader(nsHttp::If_Range);
}
}
return rv;
}
}
}
bool doValidation = false;
bool canAddImsHeader = true;
// Cached entry is not the entity we request (see bug #633743)
if (ResponseWouldVary()) {
LOG(("Validating based on Vary headers returning TRUE\n"));
canAddImsHeader = false;
doValidation = true;
}
// If the LOAD_FROM_CACHE flag is set, any cached data can simply be used
else if (mLoadFlags & nsIRequest::LOAD_FROM_CACHE) {
LOG(("NOT validating based on LOAD_FROM_CACHE load flag\n"));
doValidation = false;
}
// If the VALIDATE_ALWAYS flag is set, any cached data won't be used until
// it's revalidated with the server.
else if (mLoadFlags & nsIRequest::VALIDATE_ALWAYS) {
LOG(("Validating based on VALIDATE_ALWAYS load flag\n"));
doValidation = true;
}
// Even if the VALIDATE_NEVER flag is set, there are still some cases in
// which we must validate the cached response with the server.
else if (mLoadFlags & nsIRequest::VALIDATE_NEVER) {
LOG(("VALIDATE_NEVER set\n"));
// if no-store or if no-cache and ssl, validate cached response (see
// bug 112564 for an explanation of this logic)
if (mCachedResponseHead->NoStore() ||
(mCachedResponseHead->NoCache() && mUsingSSL)) {
LOG(("Validating based on (no-store || (no-cache && ssl)) logic\n"));
doValidation = true;
}
else {
LOG(("NOT validating based on VALIDATE_NEVER load flag\n"));
doValidation = false;
}
}
// check if validation is strictly required...
else if (mCachedResponseHead->MustValidate()) {
LOG(("Validating based on MustValidate() returning TRUE\n"));
doValidation = true;
}
else if (MustValidateBasedOnQueryUrl()) {
LOG(("Validating based on RFC 2616 section 13.9 "
"(query-url w/o explicit expiration-time)\n"));
doValidation = true;
}
// Check if the cache entry has expired...
else {
uint32_t time = 0; // a temporary variable for storing time values...
rv = mCacheEntry->GetExpirationTime(&time);
NS_ENSURE_SUCCESS(rv, rv);
if (NowInSeconds() <= time)
doValidation = false;
else if (mCachedResponseHead->MustValidateIfExpired())
doValidation = true;
else if (mLoadFlags & nsIRequest::VALIDATE_ONCE_PER_SESSION) {
// If the cached response does not include expiration infor-
// mation, then we must validate the response, despite whether
// or not this is the first access this session. This behavior
// is consistent with existing browsers and is generally expected
// by web authors.
rv = mCachedResponseHead->ComputeFreshnessLifetime(&time);
NS_ENSURE_SUCCESS(rv, rv);
if (time == 0)
doValidation = true;
else
doValidation = fromPreviousSession;
}
else
doValidation = true;
LOG(("%salidating based on expiration time\n", doValidation ? "V" : "Not v"));
}
if (!doValidation && mRequestHead.PeekHeader(nsHttp::If_Match) &&
(method == nsHttp::Get || method == nsHttp::Head)) {
const char *requestedETag, *cachedETag;
cachedETag = mCachedResponseHead->PeekHeader(nsHttp::ETag);
requestedETag = mRequestHead.PeekHeader(nsHttp::If_Match);
if (cachedETag && (!strncmp(cachedETag, "W/", 2) ||
strcmp(requestedETag, cachedETag))) {
// User has defined If-Match header, if the cached entry is not
// matching the provided header value or the cached ETag is weak,
// force validation.
doValidation = true;
}
}
if (!doValidation) {
//
// Check the authorization headers used to generate the cache entry.
// We must validate the cache entry if:
//
// 1) the cache entry was generated prior to this session w/
// credentials (see bug 103402).
// 2) the cache entry was generated w/o credentials, but would now
// require credentials (see bug 96705).
//
// NOTE: this does not apply to proxy authentication.
//
mCacheEntry->GetMetaDataElement("auth", getter_Copies(buf));
doValidation =
(fromPreviousSession && !buf.IsEmpty()) ||
(buf.IsEmpty() && mRequestHead.PeekHeader(nsHttp::Authorization));
}
// Bug #561276: We maintain a chain of cache-keys which returns cached
// 3xx-responses (redirects) in order to detect cycles. If a cycle is
// found, ignore the cached response and hit the net. Otherwise, use
// the cached response and add the cache-key to the chain. Note that
// a limited number of redirects (cached or not) is allowed and is
// enforced independently of this mechanism
if (!doValidation && isCachedRedirect) {
if (!mRedirectedCachekeys)
mRedirectedCachekeys = new nsTArray<nsCString>();
else if (mRedirectedCachekeys->Contains(mCacheKey))
doValidation = true;
LOG(("Redirection-chain %s key %s\n",
doValidation ? "contains" : "does not contain", mCacheKey.get()));
// Append cacheKey if not in the chain already
if (!doValidation)
mRedirectedCachekeys->AppendElement(mCacheKey);
}
mCachedContentIsValid = !doValidation;
if (doValidation) {
//
// now, we are definitely going to issue a HTTP request to the server.
// make it conditional if possible.
//
// do not attempt to validate no-store content, since servers will not
// expect it to be cached. (we only keep it in our cache for the
// purposes of back/forward, etc.)
//
// the request method MUST be either GET or HEAD (see bug 175641).
//
// do not override conditional headers when consumer has defined its own
if (!mCachedResponseHead->NoStore() &&
(mRequestHead.Method() == nsHttp::Get ||
mRequestHead.Method() == nsHttp::Head) &&
!mCustomConditionalRequest) {
const char *val;
// Add If-Modified-Since header if a Last-Modified was given
// and we are allowed to do this (see bugs 510359 and 269303)
if (canAddImsHeader) {
val = mCachedResponseHead->PeekHeader(nsHttp::Last_Modified);
if (val)
mRequestHead.SetHeader(nsHttp::If_Modified_Since,
nsDependentCString(val));
}
// Add If-None-Match header if an ETag was given in the response
val = mCachedResponseHead->PeekHeader(nsHttp::ETag);
if (val)
mRequestHead.SetHeader(nsHttp::If_None_Match,
nsDependentCString(val));
mDidReval = true;
}
}
if (mCachedContentIsValid || mDidReval) {
rv = OpenCacheInputStream(mCachedContentIsValid);
if (NS_FAILED(rv)) {
// If we can't get the entity then we have to act as though we
// don't have the cache entry.
if (mDidReval) {
// Make the request unconditional again.
mRequestHead.ClearHeader(nsHttp::If_Modified_Since);
mRequestHead.ClearHeader(nsHttp::ETag);
mDidReval = false;
}
mCachedContentIsValid = false;
}
}
if (mCachedContentIsValid) {
// XXX: Isn't the cache entry already valid?
MaybeMarkCacheEntryValid(this, mCacheEntry, mCacheAccess);
}
LOG(("nsHTTPChannel::CheckCache exit [this=%p doValidation=%d]\n",
this, doValidation));
return rv;
}
/*static*/ inline bool
HttpCacheQuery::HasQueryString(nsHttpAtom method, nsIURI * uri)
{
// Must be called on the main thread because nsIURI does not implement
// thread-safe QueryInterface.
MOZ_ASSERT(NS_IsMainThread());
if (method != nsHttp::Get && method != nsHttp::Head)
return false;
nsAutoCString query;
nsCOMPtr<nsIURL> url = do_QueryInterface(uri);
nsresult rv = url->GetQuery(query);
return NS_SUCCEEDED(rv) && !query.IsEmpty();
}
bool
HttpCacheQuery::MustValidateBasedOnQueryUrl() const
{
AssertOnCacheThread();
// RFC 2616, section 13.9 states that GET-requests with a query-url
// MUST NOT be treated as fresh unless the server explicitly provides
// an expiration-time in the response. See bug #468594
// Section 13.2.1 (6th paragraph) defines "explicit expiration time"
if (mHasQueryString)
{
uint32_t tmp; // we don't need the value, just whether it's set
nsresult rv = mCachedResponseHead->GetExpiresValue(&tmp);
if (NS_FAILED(rv)) {
rv = mCachedResponseHead->GetMaxAgeValue(&tmp);
if (NS_FAILED(rv)) {
return true;
}
}
}
return false;
}
bool
nsHttpChannel::ShouldUpdateOfflineCacheEntry()
{
if (!mApplicationCacheForWrite || !mOfflineCacheEntry) {
return false;
}
// if we're updating the cache entry, update the offline cache entry too
if (mCacheEntry && (mCacheAccess & nsICache::ACCESS_WRITE)) {
return true;
}
// if there's nothing in the offline cache, add it
if (mOfflineCacheEntry && (mOfflineCacheAccess == nsICache::ACCESS_WRITE)) {
return true;
}
// if the document is newer than the offline entry, update it
uint32_t docLastModifiedTime;
nsresult rv = mResponseHead->GetLastModifiedValue(&docLastModifiedTime);
if (NS_FAILED(rv)) {
return true;
}
if (mOfflineCacheLastModifiedTime == 0) {
return false;
}
if (docLastModifiedTime > mOfflineCacheLastModifiedTime) {
return true;
}
return false;
}
nsresult
HttpCacheQuery::OpenCacheInputStream(bool startBuffering)
{
AssertOnCacheThread();
if (mUsingSSL) {
nsresult rv = mCacheEntry->GetSecurityInfo(
getter_AddRefs(mCachedSecurityInfo));
if (NS_FAILED(rv)) {
LOG(("failed to parse security-info [channel=%p, entry=%p]",
this, mCacheEntry.get()));
NS_WARNING("failed to parse security-info");
return rv;
}
// XXX: We should not be skilling this check in the offline cache
// case, but we have to do so now to work around bug 794507.
MOZ_ASSERT(mCachedSecurityInfo || mLoadedFromApplicationCache);
if (!mCachedSecurityInfo && !mLoadedFromApplicationCache) {
LOG(("mCacheEntry->GetSecurityInfo returned success but did not "
"return the security info [channel=%p, entry=%p]",
this, mCacheEntry.get()));
return NS_ERROR_UNEXPECTED; // XXX error code
}
}
nsresult rv = NS_OK;
// Keep the conditions below in sync with the conditions in ReadFromCache.
if (WillRedirect(mCachedResponseHead)) {
// Do not even try to read the entity for a redirect because we do not
// return an entity to the application when we process redirects.
LOG(("Will skip read of cached redirect entity\n"));
return NS_OK;
}
if ((mLoadFlags & nsICachingChannel::LOAD_ONLY_IF_MODIFIED) &&
!mCachedContentIsPartial) {
// For LOAD_ONLY_IF_MODIFIED, we usually don't have to deal with the
// cached entity.
if (!mCacheForOfflineUse) {
LOG(("Will skip read from cache based on LOAD_ONLY_IF_MODIFIED "
"load flag\n"));
return NS_OK;
}
// If offline caching has been requested and the offline cache needs
// updating, we must complete the call even if the main cache entry
// is up to date. We don't know yet for sure whether the offline
// cache needs updating because at this point we haven't opened it
// for writing yet, so we have to start reading the cached entity now
// just in case.
LOG(("May skip read from cache based on LOAD_ONLY_IF_MODIFIED "
"load flag\n"));
}
// Open an input stream for the entity, so that the call to OpenInputStream
// happens off the main thread.
nsCOMPtr<nsIInputStream> stream;
rv = mCacheEntry->OpenInputStream(0, getter_AddRefs(stream));
if (NS_FAILED(rv)) {
LOG(("Failed to open cache input stream [channel=%p, "
"mCacheEntry=%p]", mChannel.get(), mCacheEntry.get()));
return rv;
}
if (!startBuffering) {
// We do not connect the stream to the stream transport service if we
// have to validate the entry with the server. If we did, we would get
// into a race condition between the stream transport service reading
// the existing contents and the opening of the cache entry's output
// stream to write the new contents in the case where we get a non-304
// response.
LOG(("Opened cache input stream without buffering [channel=%p, "
"mCacheEntry=%p, stream=%p]", mChannel.get(),
mCacheEntry.get(), stream.get()));
mCacheInputStream.takeOver(stream);
return rv;
}
// Have the stream transport service start reading the entity on one of its
// background threads.
nsCOMPtr<nsITransport> transport;
nsCOMPtr<nsIInputStream> wrapper;
nsCOMPtr<nsIStreamTransportService> sts =
do_GetService(kStreamTransportServiceCID, &rv);
if (NS_SUCCEEDED(rv)) {
rv = sts->CreateInputTransport(stream, int64_t(-1), int64_t(-1),
true, getter_AddRefs(transport));
}
if (NS_SUCCEEDED(rv)) {
rv = transport->OpenInputStream(0, 0, 0, getter_AddRefs(wrapper));
}
if (NS_SUCCEEDED(rv)) {
LOG(("Opened cache input stream [channel=%p, wrapper=%p, "
"transport=%p, stream=%p]", this, wrapper.get(),
transport.get(), stream.get()));
} else {
LOG(("Failed to open cache input stream [channel=%p, "
"wrapper=%p, transport=%p, stream=%p]", this,
wrapper.get(), transport.get(), stream.get()));
stream->Close();
return rv;
}
mCacheInputStream.takeOver(wrapper);
return NS_OK;
}
// Actually process the cached response that we started to handle in CheckCache
// and/or StartBufferingCachedEntity.
nsresult
nsHttpChannel::ReadFromCache(bool alreadyMarkedValid)
{
NS_ENSURE_TRUE(mCacheEntry, NS_ERROR_FAILURE);
NS_ENSURE_TRUE(mCachedContentIsValid, NS_ERROR_FAILURE);
LOG(("nsHttpChannel::ReadFromCache [this=%p] "
"Using cached copy of: %s\n", this, mSpec.get()));
if (mCachedResponseHead)
mResponseHead = mCachedResponseHead;
UpdateInhibitPersistentCachingFlag();
// if we don't already have security info, try to get it from the cache
// entry. there are two cases to consider here: 1) we are just reading
// from the cache, or 2) this may be due to a 304 not modified response,
// in which case we could have security info from a socket transport.
if (!mSecurityInfo)
mSecurityInfo = mCachedSecurityInfo;
if (!alreadyMarkedValid && !mCachedContentIsPartial) {
// We validated the entry, and we have write access to the cache, so
// mark the cache entry as valid in order to allow others access to
// this cache entry.
//
// TODO: This should be done asynchronously so we don't take the cache
// service lock on the main thread.
MaybeMarkCacheEntryValid(this, mCacheEntry, mCacheAccess);
}
nsresult rv;
// Keep the conditions below in sync with the conditions in
// StartBufferingCachedEntity.
if (WillRedirect(mResponseHead)) {
// TODO: Bug 759040 - We should call HandleAsyncRedirect directly here,
// to avoid event dispatching latency.
MOZ_ASSERT(!mCacheInputStream);
LOG(("Skipping skip read of cached redirect entity\n"));
return AsyncCall(&nsHttpChannel::HandleAsyncRedirect);
}
if ((mLoadFlags & LOAD_ONLY_IF_MODIFIED) && !mCachedContentIsPartial) {
if (!mApplicationCacheForWrite) {
LOG(("Skipping read from cache based on LOAD_ONLY_IF_MODIFIED "
"load flag\n"));
MOZ_ASSERT(!mCacheInputStream);
// TODO: Bug 759040 - We should call HandleAsyncNotModified directly
// here, to avoid event dispatching latency.
return AsyncCall(&nsHttpChannel::HandleAsyncNotModified);
}
if (!ShouldUpdateOfflineCacheEntry()) {
LOG(("Skipping read from cache based on LOAD_ONLY_IF_MODIFIED "
"load flag (mApplicationCacheForWrite not null case)\n"));
mCacheInputStream.CloseAndRelease();
// TODO: Bug 759040 - We should call HandleAsyncNotModified directly
// here, to avoid event dispatching latency.
return AsyncCall(&nsHttpChannel::HandleAsyncNotModified);
}
}
MOZ_ASSERT(mCacheInputStream);
if (!mCacheInputStream) {
NS_ERROR("mCacheInputStream is null but we're expecting to "
"be able to read from it.");
return NS_ERROR_UNEXPECTED;
}
nsCOMPtr<nsIInputStream> inputStream = mCacheInputStream.forget();
rv = nsInputStreamPump::Create(getter_AddRefs(mCachePump), inputStream,
int64_t(-1), int64_t(-1), 0, 0, true);
if (NS_FAILED(rv)) {
inputStream->Close();
return rv;
}
rv = mCachePump->AsyncRead(this, mListenerContext);
if (NS_FAILED(rv)) return rv;
if (mTimingEnabled)
mCacheReadStart = TimeStamp::Now();
uint32_t suspendCount = mSuspendCount;
while (suspendCount--)
mCachePump->Suspend();
return NS_OK;
}
void
nsHttpChannel::CloseCacheEntry(bool doomOnFailure)
{
mCacheQuery = nullptr;
mCacheInputStream.CloseAndRelease();
if (!mCacheEntry)
return;
LOG(("nsHttpChannel::CloseCacheEntry [this=%p] mStatus=%x mCacheAccess=%x",
this, mStatus, mCacheAccess));
// If we have begun to create or replace a cache entry, and that cache
// entry is not complete and not resumable, then it needs to be doomed.
// Otherwise, CheckCache will make the mistake of thinking that the
// partial cache entry is complete.
bool doom = false;
if (mInitedCacheEntry) {
NS_ASSERTION(mResponseHead, "oops");
if (NS_FAILED(mStatus) && doomOnFailure &&
(mCacheAccess & nsICache::ACCESS_WRITE) &&
!mResponseHead->IsResumable())
doom = true;
}
else if (mCacheAccess == nsICache::ACCESS_WRITE)
doom = true;
if (doom) {
LOG((" dooming cache entry!!"));
mCacheEntry->AsyncDoom(nullptr);
}
mCachedResponseHead = nullptr;
mCachePump = 0;
mCacheEntry = 0;
mCacheAccess = 0;
mInitedCacheEntry = false;
}
void
nsHttpChannel::CloseOfflineCacheEntry()
{
if (!mOfflineCacheEntry)
return;
LOG(("nsHttpChannel::CloseOfflineCacheEntry [this=%p]", this));
if (NS_FAILED(mStatus)) {
mOfflineCacheEntry->AsyncDoom(nullptr);
}
else {
bool succeeded;
if (NS_SUCCEEDED(GetRequestSucceeded(&succeeded)) && !succeeded)
mOfflineCacheEntry->AsyncDoom(nullptr);
}
mOfflineCacheEntry = 0;
mOfflineCacheAccess = 0;
}
// Initialize the cache entry for writing.
// - finalize storage policy
// - store security info
// - update expiration time
// - store headers and other meta data
nsresult
nsHttpChannel::InitCacheEntry()
{
nsresult rv;
NS_ENSURE_TRUE(mCacheEntry, NS_ERROR_UNEXPECTED);
// if only reading, nothing to be done here.
if (mCacheAccess == nsICache::ACCESS_READ)
return NS_OK;
// Don't cache the response again if already cached...
if (mCachedContentIsValid)
return NS_OK;
LOG(("nsHttpChannel::InitCacheEntry [this=%p entry=%p]\n",
this, mCacheEntry.get()));
if (mLoadFlags & INHIBIT_PERSISTENT_CACHING) {
rv = mCacheEntry->SetStoragePolicy(nsICache::STORE_IN_MEMORY);
if (NS_FAILED(rv)) return rv;
}
// Set the expiration time for this cache entry
rv = UpdateExpirationTime();
if (NS_FAILED(rv)) return rv;
rv = AddCacheEntryHeaders(mCacheEntry);
if (NS_FAILED(rv)) return rv;
mInitedCacheEntry = true;
return NS_OK;
}
void
nsHttpChannel::UpdateInhibitPersistentCachingFlag()
{
// The no-store directive within the 'Cache-Control:' header indicates
// that we must not store the response in a persistent cache.
if (mResponseHead->NoStore())
mLoadFlags |= INHIBIT_PERSISTENT_CACHING;
// Only cache SSL content on disk if the pref is set
if (!gHttpHandler->IsPersistentHttpsCachingEnabled() &&
mConnectionInfo->UsingSSL())
mLoadFlags |= INHIBIT_PERSISTENT_CACHING;
}
nsresult
nsHttpChannel::InitOfflineCacheEntry()
{
// This function can be called even when we fail to connect (bug 551990)
if (!mOfflineCacheEntry) {
return NS_OK;
}
if (!mResponseHead || mResponseHead->NoStore()) {
CloseOfflineCacheEntry();
return NS_OK;
}
// This entry's expiration time should match the main entry's expiration
// time. UpdateExpirationTime() will keep it in sync once the offline
// cache entry has been created.
if (mCacheEntry) {
uint32_t expirationTime;
nsresult rv = mCacheEntry->GetExpirationTime(&expirationTime);
NS_ENSURE_SUCCESS(rv, rv);
mOfflineCacheEntry->SetExpirationTime(expirationTime);
}
return AddCacheEntryHeaders(mOfflineCacheEntry);
}
nsresult
nsHttpChannel::AddCacheEntryHeaders(nsICacheEntryDescriptor *entry)
{
nsresult rv;
LOG(("nsHttpChannel::AddCacheEntryHeaders [this=%x] begin", this));
// Store secure data in memory only
if (mSecurityInfo)
entry->SetSecurityInfo(mSecurityInfo);
// Store the HTTP request method with the cache entry so we can distinguish
// for example GET and HEAD responses.
rv = entry->SetMetaDataElement("request-method",
mRequestHead.Method().get());
if (NS_FAILED(rv)) return rv;
// Store the HTTP authorization scheme used if any...
rv = StoreAuthorizationMetaData(entry);
if (NS_FAILED(rv)) return rv;
// Iterate over the headers listed in the Vary response header, and
// store the value of the corresponding request header so we can verify
// that it has not varied when we try to re-use the cached response at
// a later time. Take care to store "Cookie" headers only as hashes
// due to security considerations and the fact that they can be pretty
// large (bug 468426). We take care of "Vary: cookie" in ResponseWouldVary.
//
// NOTE: if "Vary: accept, cookie", then we will store the "accept" header
// in the cache. we could try to avoid needlessly storing the "accept"
// header in this case, but it doesn't seem worth the extra code to perform
// the check.
{
nsAutoCString buf, metaKey;
mResponseHead->GetHeader(nsHttp::Vary, buf);
if (!buf.IsEmpty()) {
NS_NAMED_LITERAL_CSTRING(prefix, "request-");
char *val = buf.BeginWriting(); // going to munge buf
char *token = nsCRT::strtok(val, NS_HTTP_HEADER_SEPS, &val);
while (token) {
LOG(("nsHttpChannel::AddCacheEntryHeaders [this=%x] " \
"processing %s", this, token));
if (*token != '*') {
nsHttpAtom atom = nsHttp::ResolveAtom(token);
const char *val = mRequestHead.PeekHeader(atom);
nsAutoCString hash;
if (val) {
// If cookie-header, store a hash of the value
if (atom == nsHttp::Cookie) {
LOG(("nsHttpChannel::AddCacheEntryHeaders [this=%x] " \
"cookie-value %s", this, val));
rv = Hash(val, hash);
// If hash failed, store a string not very likely
// to be the result of subsequent hashes
if (NS_FAILED(rv))
val = "<hash failed>";
else
val = hash.get();
LOG((" hashed to %s\n", val));
}
// build cache meta data key and set meta data element...
metaKey = prefix + nsDependentCString(token);
entry->SetMetaDataElement(metaKey.get(), val);
} else {
LOG(("nsHttpChannel::AddCacheEntryHeaders [this=%x] " \
"clearing metadata for %s", this, token));
metaKey = prefix + nsDependentCString(token);
entry->SetMetaDataElement(metaKey.get(), nullptr);
}
}
token = nsCRT::strtok(val, NS_HTTP_HEADER_SEPS, &val);
}
}
}
// Store the received HTTP head with the cache entry as an element of
// the meta data.
nsAutoCString head;
mResponseHead->Flatten(head, true);
rv = entry->SetMetaDataElement("response-head", head.get());
return rv;
}
inline void
GetAuthType(const char *challenge, nsCString &authType)
{
const char *p;
// get the challenge type
if ((p = strchr(challenge, ' ')) != nullptr)
authType.Assign(challenge, p - challenge);
else
authType.Assign(challenge);
}
nsresult
nsHttpChannel::StoreAuthorizationMetaData(nsICacheEntryDescriptor *entry)
{
// Not applicable to proxy authorization...
const char *val = mRequestHead.PeekHeader(nsHttp::Authorization);
if (!val)
return NS_OK;
// eg. [Basic realm="wally world"]
nsAutoCString buf;
GetAuthType(val, buf);
return entry->SetMetaDataElement("auth", buf.get());
}
// Finalize the cache entry
// - may need to rewrite response headers if any headers changed
// - may need to recalculate the expiration time if any headers changed
// - called only for freshly written cache entries
nsresult
nsHttpChannel::FinalizeCacheEntry()
{
LOG(("nsHttpChannel::FinalizeCacheEntry [this=%p]\n", this));
if (mResponseHead && mResponseHeadersModified) {
// Set the expiration time for this cache entry
nsresult rv = UpdateExpirationTime();
if (NS_FAILED(rv)) return rv;
}
return NS_OK;
}
// Open an output stream to the cache entry and insert a listener tee into
// the chain of response listeners.
nsresult
nsHttpChannel::InstallCacheListener(uint32_t offset)
{
nsresult rv;
LOG(("Preparing to write data into the cache [uri=%s]\n", mSpec.get()));
NS_ASSERTION(mCacheEntry, "no cache entry");
NS_ASSERTION(mListener, "no listener");
nsCacheStoragePolicy policy;
rv = mCacheEntry->GetStoragePolicy(&policy);
if (NS_FAILED(rv)) {
policy = nsICache::STORE_ON_DISK_AS_FILE;
}
// If the content is compressible and the server has not compressed it,
// mark the cache entry for compression.
if ((mResponseHead->PeekHeader(nsHttp::Content_Encoding) == nullptr) && (
policy != nsICache::STORE_ON_DISK_AS_FILE) && (
mResponseHead->ContentType().EqualsLiteral(TEXT_HTML) ||
mResponseHead->ContentType().EqualsLiteral(TEXT_PLAIN) ||
mResponseHead->ContentType().EqualsLiteral(TEXT_CSS) ||
mResponseHead->ContentType().EqualsLiteral(TEXT_JAVASCRIPT) ||
mResponseHead->ContentType().EqualsLiteral(TEXT_ECMASCRIPT) ||
mResponseHead->ContentType().EqualsLiteral(TEXT_XML) ||
mResponseHead->ContentType().EqualsLiteral(APPLICATION_JAVASCRIPT) ||
mResponseHead->ContentType().EqualsLiteral(APPLICATION_ECMASCRIPT) ||
mResponseHead->ContentType().EqualsLiteral(APPLICATION_XJAVASCRIPT) ||
mResponseHead->ContentType().EqualsLiteral(APPLICATION_XHTML_XML))) {
rv = mCacheEntry->SetMetaDataElement("uncompressed-len", "0");
if (NS_FAILED(rv)) {
LOG(("unable to mark cache entry for compression"));
}
}
LOG(("Trading cache input stream for output stream [channel=%p]", this));
// We must close the input stream first because cache entries do not
// correctly handle having an output stream and input streams open at
// the same time.
mCacheInputStream.CloseAndRelease();
nsCOMPtr<nsIOutputStream> out;
rv = mCacheEntry->OpenOutputStream(offset, getter_AddRefs(out));
if (NS_FAILED(rv)) return rv;
// XXX disk cache does not support overlapped i/o yet
#if 0
// Mark entry valid inorder to allow simultaneous reading...
rv = mCacheEntry->MarkValid();
if (NS_FAILED(rv)) return rv;
#endif
nsCOMPtr<nsIStreamListenerTee> tee =
do_CreateInstance(kStreamListenerTeeCID, &rv);
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsICacheService> serv =
do_GetService(NS_CACHESERVICE_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIEventTarget> cacheIOTarget;
serv->GetCacheIOTarget(getter_AddRefs(cacheIOTarget));
if (policy == nsICache::STORE_ON_DISK_AS_FILE ||
!cacheIOTarget) {
LOG(("nsHttpChannel::InstallCacheListener sync tee %p rv=%x policy=%d "
"cacheIOTarget=%p", tee.get(), rv, policy, cacheIOTarget.get()));
rv = tee->Init(mListener, out, nullptr);
} else {
LOG(("nsHttpChannel::InstallCacheListener async tee %p", tee.get()));
rv = tee->InitAsync(mListener, cacheIOTarget, out, nullptr);
}
if (NS_FAILED(rv)) return rv;
mListener = tee;
return NS_OK;
}
nsresult
nsHttpChannel::InstallOfflineCacheListener()
{
nsresult rv;
LOG(("Preparing to write data into the offline cache [uri=%s]\n",
mSpec.get()));
NS_ASSERTION(mOfflineCacheEntry, "no offline cache entry");
NS_ASSERTION(mListener, "no listener");
nsCOMPtr<nsIOutputStream> out;
rv = mOfflineCacheEntry->OpenOutputStream(0, getter_AddRefs(out));
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsIStreamListenerTee> tee =
do_CreateInstance(kStreamListenerTeeCID, &rv);
if (NS_FAILED(rv)) return rv;
rv = tee->Init(mListener, out, nullptr);
if (NS_FAILED(rv)) return rv;
mListener = tee;
return NS_OK;
}
void
nsHttpChannel::ClearBogusContentEncodingIfNeeded()
{
// For .gz files, apache sends both a Content-Type: application/x-gzip
// as well as Content-Encoding: gzip, which is completely wrong. In
// this case, we choose to ignore the rogue Content-Encoding header. We
// must do this early on so as to prevent it from being seen up stream.
// The same problem exists for Content-Encoding: compress in default
// Apache installs.
if (mResponseHead->HasHeaderValue(nsHttp::Content_Encoding, "gzip") && (
mResponseHead->ContentType().EqualsLiteral(APPLICATION_GZIP) ||
mResponseHead->ContentType().EqualsLiteral(APPLICATION_GZIP2) ||
mResponseHead->ContentType().EqualsLiteral(APPLICATION_GZIP3))) {
// clear the Content-Encoding header
mResponseHead->ClearHeader(nsHttp::Content_Encoding);
}
else if (mResponseHead->HasHeaderValue(nsHttp::Content_Encoding, "compress") && (
mResponseHead->ContentType().EqualsLiteral(APPLICATION_COMPRESS) ||
mResponseHead->ContentType().EqualsLiteral(APPLICATION_COMPRESS2))) {
// clear the Content-Encoding header
mResponseHead->ClearHeader(nsHttp::Content_Encoding);
}
}
//-----------------------------------------------------------------------------
// nsHttpChannel <redirect>
//-----------------------------------------------------------------------------
nsresult
nsHttpChannel::SetupReplacementChannel(nsIURI *newURI,
nsIChannel *newChannel,
bool preserveMethod)
{
LOG(("nsHttpChannel::SetupReplacementChannel "
"[this=%p newChannel=%p preserveMethod=%d]",
this, newChannel, preserveMethod));
nsresult rv = HttpBaseChannel::SetupReplacementChannel(newURI, newChannel, preserveMethod);
if (NS_FAILED(rv))
return rv;
nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(newChannel);
if (!httpChannel)
return NS_OK; // no other options to set
// convey the mApplyConversion flag (bug 91862)
nsCOMPtr<nsIEncodedChannel> encodedChannel = do_QueryInterface(httpChannel);
if (encodedChannel)
encodedChannel->SetApplyConversion(mApplyConversion);
// transfer the resume information
if (mResuming) {
nsCOMPtr<nsIResumableChannel> resumableChannel(do_QueryInterface(newChannel));
if (!resumableChannel) {
NS_WARNING("Got asked to resume, but redirected to non-resumable channel!");
return NS_ERROR_NOT_RESUMABLE;
}
resumableChannel->ResumeAt(mStartPos, mEntityID);
}
return NS_OK;
}
nsresult
nsHttpChannel::AsyncProcessRedirection(uint32_t redirectType)
{
LOG(("nsHttpChannel::AsyncProcessRedirection [this=%p type=%u]\n",
this, redirectType));
const char *location = mResponseHead->PeekHeader(nsHttp::Location);
// if a location header was not given, then we can't perform the redirect,
// so just carry on as though this were a normal response.
if (!location)
return NS_ERROR_FAILURE;
// make sure non-ASCII characters in the location header are escaped.
nsAutoCString locationBuf;
if (NS_EscapeURL(location, -1, esc_OnlyNonASCII, locationBuf))
location = locationBuf.get();
if (mRedirectionLimit == 0) {
LOG(("redirection limit reached!\n"));
return NS_ERROR_REDIRECT_LOOP;
}
mRedirectType = redirectType;
LOG(("redirecting to: %s [redirection-limit=%u]\n",
location, uint32_t(mRedirectionLimit)));
nsresult rv = CreateNewURI(location, getter_AddRefs(mRedirectURI));
if (NS_FAILED(rv)) {
LOG(("Invalid URI for redirect: Location: %s\n", location));
return NS_ERROR_CORRUPTED_CONTENT;
}
if (mApplicationCache) {
// if we are redirected to a different origin check if there is a fallback
// cache entry to fall back to. we don't care about file strict
// checking, at least mURI is not a file URI.
if (!NS_SecurityCompareURIs(mURI, mRedirectURI, false)) {
PushRedirectAsyncFunc(&nsHttpChannel::ContinueProcessRedirectionAfterFallback);
bool waitingForRedirectCallback;
(void)ProcessFallback(&waitingForRedirectCallback);
if (waitingForRedirectCallback)
return NS_OK;
PopRedirectAsyncFunc(&nsHttpChannel::ContinueProcessRedirectionAfterFallback);
}
}
return ContinueProcessRedirectionAfterFallback(NS_OK);
}
// Creates an URI to the given location using current URI for base and charset
nsresult
nsHttpChannel::CreateNewURI(const char *loc, nsIURI **newURI)
{
nsCOMPtr<nsIIOService> ioService;
nsresult rv = gHttpHandler->GetIOService(getter_AddRefs(ioService));
if (NS_FAILED(rv)) return rv;
// the new uri should inherit the origin charset of the current uri
nsAutoCString originCharset;
rv = mURI->GetOriginCharset(originCharset);
if (NS_FAILED(rv))
originCharset.Truncate();
return ioService->NewURI(nsDependentCString(loc),
originCharset.get(),
mURI,
newURI);
}
nsresult
nsHttpChannel::ContinueProcessRedirectionAfterFallback(nsresult rv)
{
if (NS_SUCCEEDED(rv) && mFallingBack) {
// do not continue with redirect processing, fallback is in
// progress now.
return NS_OK;
}
// Kill the current cache entry if we are redirecting
// back to ourself.
bool redirectingBackToSameURI = false;
if (mCacheEntry && (mCacheAccess & nsICache::ACCESS_WRITE) &&
NS_SUCCEEDED(mURI->Equals(mRedirectURI, &redirectingBackToSameURI)) &&
redirectingBackToSameURI)
mCacheEntry->AsyncDoom(nullptr);
// move the reference of the old location to the new one if the new
// one has none.
nsAutoCString ref;
rv = mRedirectURI->GetRef(ref);
if (NS_SUCCEEDED(rv) && ref.IsEmpty()) {
mURI->GetRef(ref);
if (!ref.IsEmpty()) {
// NOTE: SetRef will fail if mRedirectURI is immutable
// (e.g. an about: URI)... Oh well.
mRedirectURI->SetRef(ref);
}
}
bool rewriteToGET = nsHttp::ShouldRewriteRedirectToGET(
mRedirectType, mRequestHead.Method());
// prompt if the method is not safe (such as POST, PUT, DELETE, ...)
if (!rewriteToGET &&
!nsHttp::IsSafeMethod(mRequestHead.Method())) {
rv = PromptTempRedirect();
if (NS_FAILED(rv)) return rv;
}
nsCOMPtr<nsIIOService> ioService;
rv = gHttpHandler->GetIOService(getter_AddRefs(ioService));
if (NS_FAILED(rv)) return rv;
nsCOMPtr<nsIChannel> newChannel;
rv = ioService->NewChannelFromURI(mRedirectURI, getter_AddRefs(newChannel));
if (NS_FAILED(rv)) return rv;
rv = SetupReplacementChannel(mRedirectURI, newChannel, !rewriteToGET);
if (NS_FAILED(rv)) return rv;
uint32_t redirectFlags;
if (nsHttp::IsPermanentRedirect(mRedirectType))
redirectFlags = nsIChannelEventSink::REDIRECT_PERMANENT;
else
redirectFlags = nsIChannelEventSink::REDIRECT_TEMPORARY;
// verify that this is a legal redirect
mRedirectChannel = newChannel;
PushRedirectAsyncFunc(&nsHttpChannel::ContinueProcessRedirection);
rv = gHttpHandler->AsyncOnChannelRedirect(this, newChannel, redirectFlags);
if (NS_SUCCEEDED(rv))
rv = WaitForRedirectCallback();
if (NS_FAILED(rv)) {
AutoRedirectVetoNotifier notifier(this);
PopRedirectAsyncFunc(&nsHttpChannel::ContinueProcessRedirection);
}
return rv;
}
nsresult
nsHttpChannel::ContinueProcessRedirection(nsresult rv)
{
AutoRedirectVetoNotifier notifier(this);
LOG(("ContinueProcessRedirection [rv=%x]\n", rv));
if (NS_FAILED(rv))
return rv;
NS_PRECONDITION(mRedirectChannel, "No redirect channel?");
// Make sure to do this _after_ calling OnChannelRedirect
mRedirectChannel->SetOriginalURI(mOriginalURI);
// And now, the deprecated way
nsCOMPtr<nsIHttpEventSink> httpEventSink;
GetCallback(httpEventSink);
if (httpEventSink) {
// NOTE: nsIHttpEventSink is only used for compatibility with pre-1.8
// versions.
rv = httpEventSink->OnRedirect(this, mRedirectChannel);
if (NS_FAILED(rv))
return rv;
}
// XXX we used to talk directly with the script security manager, but that
// should really be handled by the event sink implementation.
// begin loading the new channel
rv = mRedirectChannel->AsyncOpen(mListener, mListenerContext);
if (NS_FAILED(rv))
return rv;
// close down this channel
Cancel(NS_BINDING_REDIRECTED);
notifier.RedirectSucceeded();
ReleaseListeners();
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsHttpChannel <auth>
//-----------------------------------------------------------------------------
NS_IMETHODIMP nsHttpChannel::OnAuthAvailable()
{
LOG(("nsHttpChannel::OnAuthAvailable [this=%p]", this));
// setting mAuthRetryPending flag and resuming the transaction
// triggers process of throwing away the unauthenticated data already
// coming from the network
mAuthRetryPending = true;
LOG(("Resuming the transaction, we got credentials from user"));
mTransactionPump->Resume();
return NS_OK;
}
NS_IMETHODIMP nsHttpChannel::OnAuthCancelled(bool userCancel)
{
LOG(("nsHttpChannel::OnAuthCancelled [this=%p]", this));
if (mTransactionPump) {
// ensure call of OnStartRequest of the current listener here,
// it would not be called otherwise at all
nsresult rv = CallOnStartRequest();
// drop mAuthRetryPending flag and resume the transaction
// this resumes load of the unauthenticated content data
mAuthRetryPending = false;
LOG(("Resuming the transaction, user cancelled the auth dialog"));
mTransactionPump->Resume();
if (NS_FAILED(rv))
mTransactionPump->Cancel(rv);
}
return NS_OK;
}
NS_IMETHODIMP nsHttpChannel::GetAsciiHostForAuth(nsACString &host)
{
if (mAuthProvider)
return mAuthProvider->GetAsciiHostForAuth(host);
nsresult rv;
nsCOMPtr<nsIURI> uri;
rv = GetURI(getter_AddRefs(uri));
if (NS_FAILED(rv))
return rv;
return uri->GetAsciiHost(host);
}
//-----------------------------------------------------------------------------
// nsHttpChannel::nsISupports
//-----------------------------------------------------------------------------
NS_IMPL_ADDREF_INHERITED(nsHttpChannel, HttpBaseChannel)
NS_IMPL_RELEASE_INHERITED(nsHttpChannel, HttpBaseChannel)
NS_INTERFACE_MAP_BEGIN(nsHttpChannel)
NS_INTERFACE_MAP_ENTRY(nsIRequest)
NS_INTERFACE_MAP_ENTRY(nsIChannel)
NS_INTERFACE_MAP_ENTRY(nsIRequestObserver)
NS_INTERFACE_MAP_ENTRY(nsIStreamListener)
NS_INTERFACE_MAP_ENTRY(nsIHttpChannel)
NS_INTERFACE_MAP_ENTRY(nsICacheInfoChannel)
NS_INTERFACE_MAP_ENTRY(nsICachingChannel)
NS_INTERFACE_MAP_ENTRY(nsIUploadChannel)
NS_INTERFACE_MAP_ENTRY(nsIUploadChannel2)
NS_INTERFACE_MAP_ENTRY(nsICacheListener)
NS_INTERFACE_MAP_ENTRY(nsIHttpChannelInternal)
NS_INTERFACE_MAP_ENTRY(nsIResumableChannel)
NS_INTERFACE_MAP_ENTRY(nsITransportEventSink)
NS_INTERFACE_MAP_ENTRY(nsISupportsPriority)
NS_INTERFACE_MAP_ENTRY(nsIProtocolProxyCallback)
NS_INTERFACE_MAP_ENTRY(nsIProxiedChannel)
NS_INTERFACE_MAP_ENTRY(nsIHttpAuthenticableChannel)
NS_INTERFACE_MAP_ENTRY(nsIApplicationCacheContainer)
NS_INTERFACE_MAP_ENTRY(nsIApplicationCacheChannel)
NS_INTERFACE_MAP_ENTRY(nsIAsyncVerifyRedirectCallback)
NS_INTERFACE_MAP_ENTRY(nsITimedChannel)
NS_INTERFACE_MAP_END_INHERITING(HttpBaseChannel)
//-----------------------------------------------------------------------------
// nsHttpChannel::nsIRequest
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsHttpChannel::Cancel(nsresult status)
{
LOG(("nsHttpChannel::Cancel [this=%p status=%x]\n", this, status));
if (mCanceled) {
LOG((" ignoring; already canceled\n"));
return NS_OK;
}
if (mWaitingForRedirectCallback) {
LOG(("channel canceled during wait for redirect callback"));
}
mCanceled = true;
mStatus = status;
if (mProxyRequest)
mProxyRequest->Cancel(status);
if (mTransaction)
gHttpHandler->CancelTransaction(mTransaction, status);
if (mTransactionPump)
mTransactionPump->Cancel(status);
mCacheQuery = nullptr;
mCacheInputStream.CloseAndRelease();
if (mCachePump)
mCachePump->Cancel(status);
if (mAuthProvider)
mAuthProvider->Cancel(status);
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::Suspend()
{
NS_ENSURE_TRUE(mIsPending, NS_ERROR_NOT_AVAILABLE);
LOG(("nsHttpChannel::Suspend [this=%p]\n", this));
++mSuspendCount;
if (mTransactionPump)
return mTransactionPump->Suspend();
if (mCachePump)
return mCachePump->Suspend();
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::Resume()
{
NS_ENSURE_TRUE(mSuspendCount > 0, NS_ERROR_UNEXPECTED);
LOG(("nsHttpChannel::Resume [this=%p]\n", this));
if (--mSuspendCount == 0 && mCallOnResume) {
nsresult rv = AsyncCall(mCallOnResume);
mCallOnResume = nullptr;
NS_ENSURE_SUCCESS(rv, rv);
}
if (mTransactionPump)
return mTransactionPump->Resume();
if (mCachePump)
return mCachePump->Resume();
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsHttpChannel::nsIChannel
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsHttpChannel::GetSecurityInfo(nsISupports **securityInfo)
{
NS_ENSURE_ARG_POINTER(securityInfo);
*securityInfo = mSecurityInfo;
NS_IF_ADDREF(*securityInfo);
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::AsyncOpen(nsIStreamListener *listener, nsISupports *context)
{
LOG(("nsHttpChannel::AsyncOpen [this=%p]\n", this));
NS_ENSURE_ARG_POINTER(listener);
NS_ENSURE_TRUE(!mIsPending, NS_ERROR_IN_PROGRESS);
NS_ENSURE_TRUE(!mWasOpened, NS_ERROR_ALREADY_OPENED);
nsresult rv;
rv = NS_CheckPortSafety(mURI);
if (NS_FAILED(rv)) {
ReleaseListeners();
return rv;
}
// Remember the cookie header that was set, if any
const char *cookieHeader = mRequestHead.PeekHeader(nsHttp::Cookie);
if (cookieHeader) {
mUserSetCookieHeader = cookieHeader;
}
AddCookiesToRequest();
mIsPending = true;
mWasOpened = true;
mListener = listener;
mListenerContext = context;
// add ourselves to the load group. from this point forward, we'll report
// all failures asynchronously.
if (mLoadGroup)
mLoadGroup->AddRequest(this, nullptr);
// record asyncopen time unconditionally and clear it if we
// don't want it after OnModifyRequest() weighs in. But waiting for
// that to complete would mean we don't include proxy resolution in the
// timing.
mAsyncOpenTime = TimeStamp::Now();
// the only time we would already know the proxy information at this
// point would be if we were proxying a non-http protocol like ftp
if (!mProxyInfo && NS_SUCCEEDED(ResolveProxy()))
return NS_OK;
rv = BeginConnect();
if (NS_FAILED(rv))
ReleaseListeners();
return rv;
}
nsresult
nsHttpChannel::BeginConnect()
{
LOG(("nsHttpChannel::BeginConnect [this=%p]\n", this));
nsresult rv;
// notify "http-on-modify-request" observers
gHttpHandler->OnModifyRequest(this);
// If mTimingEnabled flag is not set after OnModifyRequest() then
// clear the already recorded AsyncOpen value for consistency.
if (!mTimingEnabled)
mAsyncOpenTime = TimeStamp();
// Construct connection info object
nsAutoCString host;
int32_t port = -1;
bool usingSSL = false;
rv = mURI->SchemeIs("https", &usingSSL);
if (NS_SUCCEEDED(rv))
rv = mURI->GetAsciiHost(host);
if (NS_SUCCEEDED(rv))
rv = mURI->GetPort(&port);
if (NS_SUCCEEDED(rv))
rv = mURI->GetAsciiSpec(mSpec);
if (NS_FAILED(rv))
return rv;
// Reject the URL if it doesn't specify a host
if (host.IsEmpty())
return NS_ERROR_MALFORMED_URI;
LOG(("host=%s port=%d\n", host.get(), port));
LOG(("uri=%s\n", mSpec.get()));
nsCOMPtr<nsProxyInfo> proxyInfo;
if (mProxyInfo)
proxyInfo = do_QueryInterface(mProxyInfo);
mConnectionInfo = new nsHttpConnectionInfo(host, port, proxyInfo, usingSSL);
mAuthProvider =
do_CreateInstance("@mozilla.org/network/http-channel-auth-provider;1",
&rv);
if (NS_SUCCEEDED(rv))
rv = mAuthProvider->Init(this);
if (NS_FAILED(rv))
return rv;
// check to see if authorization headers should be included
mAuthProvider->AddAuthorizationHeaders();
// when proxying only use the pipeline bit if ProxyPipelining() allows it.
if (!mConnectionInfo->UsingConnect() && mConnectionInfo->UsingHttpProxy()) {
mCaps &= ~NS_HTTP_ALLOW_PIPELINING;
if (gHttpHandler->ProxyPipelining())
mCaps |= NS_HTTP_ALLOW_PIPELINING;
}
// if this somehow fails we can go on without it
gHttpHandler->AddConnectionHeader(&mRequestHead.Headers(), mCaps);
if (!mConnectionInfo->UsingHttpProxy()) {
// Start a DNS lookup very early in case the real open is queued the DNS can
// happen in parallel. Do not do so in the presence of an HTTP proxy as
// all lookups other than for the proxy itself are done by the proxy.
//
// We keep the DNS prefetch object around so that we can retrieve
// timing information from it. There is no guarantee that we actually
// use the DNS prefetch data for the real connection, but as we keep
// this data around for 3 minutes by default, this should almost always
// be correct, and even when it isn't, the timing still represents _a_
// valid DNS lookup timing for the site, even if it is not _the_
// timing we used.
mDNSPrefetch = new nsDNSPrefetch(mURI, mTimingEnabled);
mDNSPrefetch->PrefetchHigh();
}
// Adjust mCaps according to our request headers:
// - If "Connection: close" is set as a request header, then do not bother
// trying to establish a keep-alive connection.
if (mRequestHead.HasHeaderValue(nsHttp::Connection, "close"))
mCaps &= ~(NS_HTTP_ALLOW_KEEPALIVE | NS_HTTP_ALLOW_PIPELINING);
if ((mLoadFlags & VALIDATE_ALWAYS) ||
(BYPASS_LOCAL_CACHE(mLoadFlags)))
mCaps |= NS_HTTP_REFRESH_DNS;
// Force-Reload should reset the persistent connection pool for this host
if (mLoadFlags & LOAD_FRESH_CONNECTION)
mCaps |= NS_HTTP_CLEAR_KEEPALIVES;
// We may have been cancelled already, either by on-modify-request
// listeners or by load group observers; in that case, we should
// not send the request to the server
if (mCanceled)
rv = mStatus;
else
rv = Connect();
if (NS_FAILED(rv)) {
LOG(("Calling AsyncAbort [rv=%x mCanceled=%i]\n", rv, mCanceled));
CloseCacheEntry(true);
AsyncAbort(rv);
} else if (mLoadFlags & LOAD_CLASSIFY_URI) {
nsRefPtr<nsChannelClassifier> classifier = new nsChannelClassifier();
rv = classifier->Start(this);
if (NS_FAILED(rv)) {
Cancel(rv);
return rv;
}
}
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsHttpChannel::nsIHttpChannelInternal
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsHttpChannel::SetupFallbackChannel(const char *aFallbackKey)
{
ENSURE_CALLED_BEFORE_ASYNC_OPEN();
LOG(("nsHttpChannel::SetupFallbackChannel [this=%x, key=%s]",
this, aFallbackKey));
mFallbackChannel = true;
mFallbackKey = aFallbackKey;
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsHttpChannel::nsISupportsPriority
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsHttpChannel::SetPriority(int32_t value)
{
int16_t newValue = clamped<int32_t>(value, INT16_MIN, INT16_MAX);
if (mPriority == newValue)
return NS_OK;
mPriority = newValue;
if (mTransaction)
gHttpHandler->RescheduleTransaction(mTransaction, mPriority);
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsHttpChannel::nsIProtocolProxyCallback
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsHttpChannel::OnProxyAvailable(nsICancelable *request, nsIURI *uri,
nsIProxyInfo *pi, nsresult status)
{
LOG(("nsHttpChannel::OnProxyAvailable [this=%p pi=%p status=%x mStatus=%x]\n",
this, pi, status, mStatus));
mProxyRequest = nullptr;
nsresult rv;
// If status is a failure code, then it means that we failed to resolve
// proxy info. That is a non-fatal error assuming it wasn't because the
// request was canceled. We just failover to DIRECT when proxy resolution
// fails (failure can mean that the PAC URL could not be loaded).
if (NS_SUCCEEDED(status))
mProxyInfo = pi;
if (!gHttpHandler->Active()) {
LOG(("nsHttpChannel::OnProxyAvailable [this=%p] "
"Handler no longer active.\n", this));
rv = NS_ERROR_NOT_AVAILABLE;
}
else {
rv = BeginConnect();
}
if (NS_FAILED(rv)) {
Cancel(rv);
DoNotifyListener();
}
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsHttpChannel::nsIProxiedChannel
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsHttpChannel::GetProxyInfo(nsIProxyInfo **result)
{
if (!mConnectionInfo)
*result = mProxyInfo;
else
*result = mConnectionInfo->ProxyInfo();
NS_IF_ADDREF(*result);
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsHttpChannel::nsITimedChannel
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsHttpChannel::SetTimingEnabled(bool enabled) {
mTimingEnabled = enabled;
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::GetTimingEnabled(bool* _retval) {
*_retval = mTimingEnabled;
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::GetChannelCreation(TimeStamp* _retval) {
*_retval = mChannelCreationTimestamp;
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::GetAsyncOpen(TimeStamp* _retval) {
*_retval = mAsyncOpenTime;
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::GetDomainLookupStart(TimeStamp* _retval) {
if (mDNSPrefetch && mDNSPrefetch->TimingsValid())
*_retval = mDNSPrefetch->StartTimestamp();
else if (mTransaction)
*_retval = mTransaction->Timings().domainLookupStart;
else
*_retval = mTransactionTimings.domainLookupStart;
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::GetDomainLookupEnd(TimeStamp* _retval) {
if (mDNSPrefetch && mDNSPrefetch->TimingsValid())
*_retval = mDNSPrefetch->EndTimestamp();
else if (mTransaction)
*_retval = mTransaction->Timings().domainLookupEnd;
else
*_retval = mTransactionTimings.domainLookupEnd;
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::GetConnectStart(TimeStamp* _retval) {
if (mTransaction)
*_retval = mTransaction->Timings().connectStart;
else
*_retval = mTransactionTimings.connectStart;
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::GetConnectEnd(TimeStamp* _retval) {
if (mTransaction)
*_retval = mTransaction->Timings().connectEnd;
else
*_retval = mTransactionTimings.connectEnd;
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::GetRequestStart(TimeStamp* _retval) {
if (mTransaction)
*_retval = mTransaction->Timings().requestStart;
else
*_retval = mTransactionTimings.requestStart;
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::GetResponseStart(TimeStamp* _retval) {
if (mTransaction)
*_retval = mTransaction->Timings().responseStart;
else
*_retval = mTransactionTimings.responseStart;
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::GetResponseEnd(TimeStamp* _retval) {
if (mTransaction)
*_retval = mTransaction->Timings().responseEnd;
else
*_retval = mTransactionTimings.responseEnd;
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::GetCacheReadStart(TimeStamp* _retval) {
*_retval = mCacheReadStart;
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::GetCacheReadEnd(TimeStamp* _retval) {
*_retval = mCacheReadEnd;
return NS_OK;
}
#define IMPL_TIMING_ATTR(name) \
NS_IMETHODIMP \
nsHttpChannel::Get##name##Time(PRTime* _retval) { \
TimeStamp stamp; \
Get##name(&stamp); \
if (stamp.IsNull()) { \
*_retval = 0; \
return NS_OK; \
} \
*_retval = mChannelCreationTime + \
(PRTime) ((stamp - mChannelCreationTimestamp).ToSeconds() * 1e6); \
return NS_OK; \
}
IMPL_TIMING_ATTR(ChannelCreation)
IMPL_TIMING_ATTR(AsyncOpen)
IMPL_TIMING_ATTR(DomainLookupStart)
IMPL_TIMING_ATTR(DomainLookupEnd)
IMPL_TIMING_ATTR(ConnectStart)
IMPL_TIMING_ATTR(ConnectEnd)
IMPL_TIMING_ATTR(RequestStart)
IMPL_TIMING_ATTR(ResponseStart)
IMPL_TIMING_ATTR(ResponseEnd)
IMPL_TIMING_ATTR(CacheReadStart)
IMPL_TIMING_ATTR(CacheReadEnd)
#undef IMPL_TIMING_ATTR
//-----------------------------------------------------------------------------
// nsHttpChannel::nsIHttpAuthenticableChannel
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsHttpChannel::GetIsSSL(bool *aIsSSL)
{
*aIsSSL = mConnectionInfo->UsingSSL();
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::GetProxyMethodIsConnect(bool *aProxyMethodIsConnect)
{
*aProxyMethodIsConnect = mConnectionInfo->UsingConnect();
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::GetServerResponseHeader(nsACString &value)
{
if (!mResponseHead)
return NS_ERROR_NOT_AVAILABLE;
return mResponseHead->GetHeader(nsHttp::Server, value);
}
NS_IMETHODIMP
nsHttpChannel::GetProxyChallenges(nsACString &value)
{
if (!mResponseHead)
return NS_ERROR_UNEXPECTED;
return mResponseHead->GetHeader(nsHttp::Proxy_Authenticate, value);
}
NS_IMETHODIMP
nsHttpChannel::GetWWWChallenges(nsACString &value)
{
if (!mResponseHead)
return NS_ERROR_UNEXPECTED;
return mResponseHead->GetHeader(nsHttp::WWW_Authenticate, value);
}
NS_IMETHODIMP
nsHttpChannel::SetProxyCredentials(const nsACString &value)
{
return mRequestHead.SetHeader(nsHttp::Proxy_Authorization, value);
}
NS_IMETHODIMP
nsHttpChannel::SetWWWCredentials(const nsACString &value)
{
return mRequestHead.SetHeader(nsHttp::Authorization, value);
}
//-----------------------------------------------------------------------------
// Methods that nsIHttpAuthenticableChannel dupes from other IDLs, which we
// get from HttpBaseChannel, must be explicitly forwarded, because C++ sucks.
//
NS_IMETHODIMP
nsHttpChannel::GetLoadFlags(nsLoadFlags *aLoadFlags)
{
return HttpBaseChannel::GetLoadFlags(aLoadFlags);
}
NS_IMETHODIMP
nsHttpChannel::GetURI(nsIURI **aURI)
{
return HttpBaseChannel::GetURI(aURI);
}
NS_IMETHODIMP
nsHttpChannel::GetNotificationCallbacks(nsIInterfaceRequestor **aCallbacks)
{
return HttpBaseChannel::GetNotificationCallbacks(aCallbacks);
}
NS_IMETHODIMP
nsHttpChannel::GetLoadGroup(nsILoadGroup **aLoadGroup)
{
return HttpBaseChannel::GetLoadGroup(aLoadGroup);
}
NS_IMETHODIMP
nsHttpChannel::GetRequestMethod(nsACString& aMethod)
{
return HttpBaseChannel::GetRequestMethod(aMethod);
}
//-----------------------------------------------------------------------------
// nsHttpChannel::nsIRequestObserver
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsHttpChannel::OnStartRequest(nsIRequest *request, nsISupports *ctxt)
{
SAMPLE_LABEL("nsHttpChannel", "OnStartRequest");
if (!(mCanceled || NS_FAILED(mStatus))) {
// capture the request's status, so our consumers will know ASAP of any
// connection failures, etc - bug 93581
request->GetStatus(&mStatus);
}
LOG(("nsHttpChannel::OnStartRequest [this=%p request=%p status=%x]\n",
this, request, mStatus));
// Make sure things are what we expect them to be...
NS_ASSERTION(request == mCachePump || request == mTransactionPump,
"Unexpected request");
NS_ASSERTION(!(mTransactionPump && mCachePump) || mCachedContentIsPartial,
"If we have both pumps, the cache content must be partial");
if (!mSecurityInfo && !mCachePump && mTransaction) {
// grab the security info from the connection object; the transaction
// is guaranteed to own a reference to the connection.
mSecurityInfo = mTransaction->SecurityInfo();
}
if (!mCachePump && NS_FAILED(mStatus) &&
(mLoadFlags & LOAD_REPLACE) && mOriginalURI && mAllowSpdy) {
// For sanity's sake we may want to cancel an alternate protocol
// redirection involving the original host name
nsAutoCString hostPort;
if (NS_SUCCEEDED(mOriginalURI->GetHostPort(hostPort)))
gHttpHandler->ConnMgr()->RemoveSpdyAlternateProtocol(hostPort);
}
// don't enter this block if we're reading from the cache...
if (NS_SUCCEEDED(mStatus) && !mCachePump && mTransaction) {
// mTransactionPump doesn't hit OnInputStreamReady and call this until
// all of the response headers have been acquired, so we can take ownership
// of them from the transaction.
mResponseHead = mTransaction->TakeResponseHead();
// the response head may be null if the transaction was cancelled. in
// which case we just need to call OnStartRequest/OnStopRequest.
if (mResponseHead)
return ProcessResponse();
NS_WARNING("No response head in OnStartRequest");
}
// avoid crashing if mListener happens to be null...
if (!mListener) {
NS_NOTREACHED("mListener is null");
return NS_OK;
}
// on proxy errors, try to failover
if (mConnectionInfo->ProxyInfo() &&
(mStatus == NS_ERROR_PROXY_CONNECTION_REFUSED ||
mStatus == NS_ERROR_UNKNOWN_PROXY_HOST ||
mStatus == NS_ERROR_NET_TIMEOUT)) {
PushRedirectAsyncFunc(&nsHttpChannel::ContinueOnStartRequest1);
if (NS_SUCCEEDED(ProxyFailover()))
return NS_OK;
PopRedirectAsyncFunc(&nsHttpChannel::ContinueOnStartRequest1);
}
return ContinueOnStartRequest2(NS_OK);
}
nsresult
nsHttpChannel::ContinueOnStartRequest1(nsresult result)
{
// Success indicates we passed ProxyFailover, in that case we must not continue
// with this code chain.
if (NS_SUCCEEDED(result))
return NS_OK;
return ContinueOnStartRequest2(result);
}
nsresult
nsHttpChannel::ContinueOnStartRequest2(nsresult result)
{
// on other request errors, try to fall back
if (NS_FAILED(mStatus)) {
PushRedirectAsyncFunc(&nsHttpChannel::ContinueOnStartRequest3);
bool waitingForRedirectCallback;
ProcessFallback(&waitingForRedirectCallback);
if (waitingForRedirectCallback)
return NS_OK;
PopRedirectAsyncFunc(&nsHttpChannel::ContinueOnStartRequest3);
}
return ContinueOnStartRequest3(NS_OK);
}
nsresult
nsHttpChannel::ContinueOnStartRequest3(nsresult result)
{
if (mFallingBack)
return NS_OK;
return CallOnStartRequest();
}
NS_IMETHODIMP
nsHttpChannel::OnStopRequest(nsIRequest *request, nsISupports *ctxt, nsresult status)
{
SAMPLE_LABEL("network", "nsHttpChannel::OnStopRequest");
LOG(("nsHttpChannel::OnStopRequest [this=%p request=%p status=%x]\n",
this, request, status));
if (mTimingEnabled && request == mCachePump) {
mCacheReadEnd = TimeStamp::Now();
}
// allow content to be cached if it was loaded successfully (bug #482935)
bool contentComplete = NS_SUCCEEDED(status);
// honor the cancelation status even if the underlying transaction completed.
if (mCanceled || NS_FAILED(mStatus))
status = mStatus;
if (mCachedContentIsPartial) {
if (NS_SUCCEEDED(status)) {
// mTransactionPump should be suspended
NS_ASSERTION(request != mTransactionPump,
"byte-range transaction finished prematurely");
if (request == mCachePump) {
bool streamDone;
status = OnDoneReadingPartialCacheEntry(&streamDone);
if (NS_SUCCEEDED(status) && !streamDone)
return status;
// otherwise, fall through and fire OnStopRequest...
}
else
NS_NOTREACHED("unexpected request");
}
// Do not to leave the transaction in a suspended state in error cases.
if (NS_FAILED(status) && mTransaction)
gHttpHandler->CancelTransaction(mTransaction, status);
}
if (mTransaction) {
// determine if we should call DoAuthRetry
bool authRetry = mAuthRetryPending && NS_SUCCEEDED(status);
//
// grab references to connection in case we need to retry an
// authentication request over it or use it for an upgrade
// to another protocol.
//
// this code relies on the code in nsHttpTransaction::Close, which
// tests for NS_HTTP_STICKY_CONNECTION to determine whether or not to
// keep the connection around after the transaction is finished.
//
nsRefPtr<nsAHttpConnection> conn;
if (authRetry && (mCaps & NS_HTTP_STICKY_CONNECTION)) {
conn = mTransaction->Connection();
// This is so far a workaround to fix leak when reusing unpersistent
// connection for authentication retry. See bug 459620 comment 4
// for details.
if (conn && !conn->IsPersistent())
conn = nullptr;
}
nsRefPtr<nsAHttpConnection> stickyConn;
if (mCaps & NS_HTTP_STICKY_CONNECTION)
stickyConn = mTransaction->Connection();
// at this point, we're done with the transaction
mTransactionTimings = mTransaction->Timings();
mTransaction = nullptr;
mTransactionPump = 0;
// We no longer need the dns prefetch object
if (mDNSPrefetch && mDNSPrefetch->TimingsValid()) {
mTransactionTimings.domainLookupStart =
mDNSPrefetch->StartTimestamp();
mTransactionTimings.domainLookupEnd =
mDNSPrefetch->EndTimestamp();
}
mDNSPrefetch = nullptr;
// handle auth retry...
if (authRetry) {
mAuthRetryPending = false;
status = DoAuthRetry(conn);
if (NS_SUCCEEDED(status))
return NS_OK;
}
// If DoAuthRetry failed, or if we have been cancelled since showing
// the auth. dialog, then we need to send OnStartRequest now
if (authRetry || (mAuthRetryPending && NS_FAILED(status))) {
NS_ASSERTION(NS_FAILED(status), "should have a failure code here");
// NOTE: since we have a failure status, we can ignore the return
// value from onStartRequest.
mListener->OnStartRequest(this, mListenerContext);
}
// if this transaction has been replaced, then bail.
if (mTransactionReplaced)
return NS_OK;
if (mUpgradeProtocolCallback && stickyConn &&
mResponseHead && mResponseHead->Status() == 101) {
gHttpHandler->ConnMgr()->CompleteUpgrade(stickyConn,
mUpgradeProtocolCallback);
}
}
mIsPending = false;
mStatus = status;
// perform any final cache operations before we close the cache entry.
if (mCacheEntry && (mCacheAccess & nsICache::ACCESS_WRITE) &&
mRequestTimeInitialized){
FinalizeCacheEntry();
}
if (mListener) {
LOG((" calling OnStopRequest\n"));
mListener->OnStopRequest(this, mListenerContext, status);
}
if (mCacheEntry) {
bool asFile = false;
if (mInitedCacheEntry && !mCachedContentIsPartial &&
(NS_SUCCEEDED(mStatus) || contentComplete) &&
(mCacheAccess & nsICache::ACCESS_WRITE) &&
NS_SUCCEEDED(GetCacheAsFile(&asFile)) && asFile) {
// We can allow others access to the cache entry
// because we don't write to the cache anymore.
// CloseCacheEntry may not actually close the cache
// entry immediately because someone (such as XHR2
// blob response) may hold the token to the cache
// entry. So we mark the cache valid here.
// We also need to check the entry is stored as file
// because we write to the cache asynchronously when
// it isn't stored in the file and it isn't completely
// written to the disk yet.
mCacheEntry->MarkValid();
}
}
CloseCacheEntry(!contentComplete);
if (mOfflineCacheEntry)
CloseOfflineCacheEntry();
if (mLoadGroup)
mLoadGroup->RemoveRequest(this, nullptr, status);
// We don't need this info anymore
CleanRedirectCacheChainIfNecessary();
ReleaseListeners();
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsHttpChannel::nsIStreamListener
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsHttpChannel::OnDataAvailable(nsIRequest *request, nsISupports *ctxt,
nsIInputStream *input,
uint64_t offset, uint32_t count)
{
SAMPLE_LABEL("network", "nsHttpChannel::OnDataAvailable");
LOG(("nsHttpChannel::OnDataAvailable [this=%p request=%p offset=%llu count=%u]\n",
this, request, offset, count));
// don't send out OnDataAvailable notifications if we've been canceled.
if (mCanceled)
return mStatus;
NS_ASSERTION(mResponseHead, "No response head in ODA!!");
NS_ASSERTION(!(mCachedContentIsPartial && (request == mTransactionPump)),
"transaction pump not suspended");
if (mAuthRetryPending || (request == mTransactionPump && mTransactionReplaced)) {
uint32_t n;
return input->ReadSegments(NS_DiscardSegment, nullptr, count, &n);
}
if (mListener) {
//
// synthesize transport progress event. we do this here since we want
// to delay OnProgress events until we start streaming data. this is
// crucially important since it impacts the lock icon (see bug 240053).
//
nsresult transportStatus;
if (request == mCachePump)
transportStatus = NS_NET_STATUS_READING;
else
transportStatus = NS_NET_STATUS_RECEIVING_FROM;
// mResponseHead may reference new or cached headers, but either way it
// holds our best estimate of the total content length. Even in the case
// of a byte range request, the content length stored in the cached
// response headers is what we want to use here.
uint64_t progressMax(uint64_t(mResponseHead->ContentLength()));
uint64_t progress = mLogicalOffset + uint64_t(count);
NS_ASSERTION(progress <= progressMax, "unexpected progress values");
OnTransportStatus(nullptr, transportStatus, progress, progressMax);
//
// we have to manually keep the logical offset of the stream up-to-date.
// we cannot depend solely on the offset provided, since we may have
// already streamed some data from another source (see, for example,
// OnDoneReadingPartialCacheEntry).
//
nsresult rv = mListener->OnDataAvailable(this,
mListenerContext,
input,
mLogicalOffset,
count);
if (NS_SUCCEEDED(rv))
mLogicalOffset = progress;
return rv;
}
return NS_ERROR_ABORT;
}
//-----------------------------------------------------------------------------
// nsHttpChannel::nsITransportEventSink
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsHttpChannel::OnTransportStatus(nsITransport *trans, nsresult status,
uint64_t progress, uint64_t progressMax)
{
// cache the progress sink so we don't have to query for it each time.
if (!mProgressSink)
GetCallback(mProgressSink);
if (status == NS_NET_STATUS_CONNECTED_TO ||
status == NS_NET_STATUS_WAITING_FOR) {
nsCOMPtr<nsISocketTransport> socketTransport =
do_QueryInterface(trans);
if (socketTransport) {
socketTransport->GetSelfAddr(&mSelfAddr);
socketTransport->GetPeerAddr(&mPeerAddr);
}
}
// block socket status event after Cancel or OnStopRequest has been called.
if (mProgressSink && NS_SUCCEEDED(mStatus) && mIsPending && !(mLoadFlags & LOAD_BACKGROUND)) {
LOG(("sending status notification [this=%p status=%x progress=%llu/%llu]\n",
this, status, progress, progressMax));
nsAutoCString host;
mURI->GetHost(host);
mProgressSink->OnStatus(this, nullptr, status,
NS_ConvertUTF8toUTF16(host).get());
if (progress > 0) {
NS_ASSERTION(progress <= progressMax, "unexpected progress values");
mProgressSink->OnProgress(this, nullptr, progress, progressMax);
}
}
#ifdef DEBUG
else
LOG(("skipping status notification [this=%p sink=%p pending=%u background=%x]\n",
this, mProgressSink.get(), mIsPending, (mLoadFlags & LOAD_BACKGROUND)));
#endif
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsHttpChannel::nsICacheInfoChannel
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsHttpChannel::IsFromCache(bool *value)
{
if (!mIsPending)
return NS_ERROR_NOT_AVAILABLE;
// return false if reading a partial cache entry; the data isn't entirely
// from the cache!
*value = (mCachePump || (mLoadFlags & LOAD_ONLY_IF_MODIFIED)) &&
mCachedContentIsValid && !mCachedContentIsPartial;
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::GetCacheTokenExpirationTime(uint32_t *_retval)
{
NS_ENSURE_ARG_POINTER(_retval);
if (!mCacheEntry)
return NS_ERROR_NOT_AVAILABLE;
return mCacheEntry->GetExpirationTime(_retval);
}
NS_IMETHODIMP
nsHttpChannel::GetCacheTokenCachedCharset(nsACString &_retval)
{
nsresult rv;
if (!mCacheEntry)
return NS_ERROR_NOT_AVAILABLE;
nsXPIDLCString cachedCharset;
rv = mCacheEntry->GetMetaDataElement("charset",
getter_Copies(cachedCharset));
if (NS_SUCCEEDED(rv))
_retval = cachedCharset;
return rv;
}
NS_IMETHODIMP
nsHttpChannel::SetCacheTokenCachedCharset(const nsACString &aCharset)
{
if (!mCacheEntry)
return NS_ERROR_NOT_AVAILABLE;
return mCacheEntry->SetMetaDataElement("charset",
PromiseFlatCString(aCharset).get());
}
//-----------------------------------------------------------------------------
// nsHttpChannel::nsICachingChannel
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsHttpChannel::GetCacheToken(nsISupports **token)
{
NS_ENSURE_ARG_POINTER(token);
if (!mCacheEntry)
return NS_ERROR_NOT_AVAILABLE;
return CallQueryInterface(mCacheEntry, token);
}
NS_IMETHODIMP
nsHttpChannel::SetCacheToken(nsISupports *token)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHODIMP
nsHttpChannel::GetOfflineCacheToken(nsISupports **token)
{
NS_ENSURE_ARG_POINTER(token);
if (!mOfflineCacheEntry)
return NS_ERROR_NOT_AVAILABLE;
return CallQueryInterface(mOfflineCacheEntry, token);
}
NS_IMETHODIMP
nsHttpChannel::SetOfflineCacheToken(nsISupports *token)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
class nsHttpChannelCacheKey MOZ_FINAL : public nsISupportsPRUint32,
public nsISupportsCString
{
NS_DECL_ISUPPORTS
NS_DECL_NSISUPPORTSPRIMITIVE
NS_FORWARD_NSISUPPORTSPRUINT32(mSupportsPRUint32->)
// Both interfaces declares toString method with the same signature.
// Thus we have to delegate only to nsISupportsPRUint32 implementation.
NS_IMETHOD GetData(nsACString & aData)
{
return mSupportsCString->GetData(aData);
}
NS_IMETHOD SetData(const nsACString & aData)
{
return mSupportsCString->SetData(aData);
}
public:
nsresult SetData(uint32_t aPostID, const nsACString& aKey);
protected:
nsCOMPtr<nsISupportsPRUint32> mSupportsPRUint32;
nsCOMPtr<nsISupportsCString> mSupportsCString;
};
NS_IMPL_ADDREF(nsHttpChannelCacheKey)
NS_IMPL_RELEASE(nsHttpChannelCacheKey)
NS_INTERFACE_TABLE_HEAD(nsHttpChannelCacheKey)
NS_INTERFACE_TABLE_BEGIN
NS_INTERFACE_TABLE_ENTRY_AMBIGUOUS(nsHttpChannelCacheKey,
nsISupports, nsISupportsPRUint32)
NS_INTERFACE_TABLE_ENTRY_AMBIGUOUS(nsHttpChannelCacheKey,
nsISupportsPrimitive, nsISupportsPRUint32)
NS_INTERFACE_TABLE_ENTRY(nsHttpChannelCacheKey,
nsISupportsPRUint32)
NS_INTERFACE_TABLE_ENTRY(nsHttpChannelCacheKey,
nsISupportsCString)
NS_INTERFACE_TABLE_END
NS_INTERFACE_TABLE_TAIL
NS_IMETHODIMP nsHttpChannelCacheKey::GetType(uint16_t *aType)
{
NS_ENSURE_ARG_POINTER(aType);
*aType = TYPE_PRUINT32;
return NS_OK;
}
nsresult nsHttpChannelCacheKey::SetData(uint32_t aPostID,
const nsACString& aKey)
{
nsresult rv;
mSupportsCString =
do_CreateInstance(NS_SUPPORTS_CSTRING_CONTRACTID, &rv);
if (NS_FAILED(rv)) return rv;
mSupportsCString->SetData(aKey);
if (NS_FAILED(rv)) return rv;
mSupportsPRUint32 =
do_CreateInstance(NS_SUPPORTS_PRUINT32_CONTRACTID, &rv);
if (NS_FAILED(rv)) return rv;
mSupportsPRUint32->SetData(aPostID);
if (NS_FAILED(rv)) return rv;
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::GetCacheKey(nsISupports **key)
{
nsresult rv;
NS_ENSURE_ARG_POINTER(key);
LOG(("nsHttpChannel::GetCacheKey [this=%p]\n", this));
*key = nullptr;
nsRefPtr<nsHttpChannelCacheKey> container =
new nsHttpChannelCacheKey();
if (!container)
return NS_ERROR_OUT_OF_MEMORY;
nsAutoCString cacheKey;
rv = GenerateCacheKey(mPostID, cacheKey);
if (NS_FAILED(rv)) return rv;
rv = container->SetData(mPostID, cacheKey);
if (NS_FAILED(rv)) return rv;
return CallQueryInterface(container.get(), key);
}
NS_IMETHODIMP
nsHttpChannel::SetCacheKey(nsISupports *key)
{
nsresult rv;
LOG(("nsHttpChannel::SetCacheKey [this=%p key=%p]\n", this, key));
ENSURE_CALLED_BEFORE_ASYNC_OPEN();
if (!key)
mPostID = 0;
else {
// extract the post id
nsCOMPtr<nsISupportsPRUint32> container = do_QueryInterface(key, &rv);
if (NS_FAILED(rv)) return rv;
rv = container->GetData(&mPostID);
if (NS_FAILED(rv)) return rv;
}
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::GetCacheAsFile(bool *value)
{
NS_ENSURE_ARG_POINTER(value);
if (!mCacheEntry)
return NS_ERROR_NOT_AVAILABLE;
nsCacheStoragePolicy storagePolicy;
mCacheEntry->GetStoragePolicy(&storagePolicy);
*value = (storagePolicy == nsICache::STORE_ON_DISK_AS_FILE);
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::SetCacheAsFile(bool value)
{
if (!mCacheEntry || mLoadFlags & INHIBIT_PERSISTENT_CACHING)
return NS_ERROR_NOT_AVAILABLE;
nsCacheStoragePolicy policy;
if (value)
policy = nsICache::STORE_ON_DISK_AS_FILE;
else
policy = nsICache::STORE_ANYWHERE;
return mCacheEntry->SetStoragePolicy(policy);
}
NS_IMETHODIMP
nsHttpChannel::GetCacheFile(nsIFile **cacheFile)
{
if (!mCacheEntry)
return NS_ERROR_NOT_AVAILABLE;
return mCacheEntry->GetFile(cacheFile);
}
//-----------------------------------------------------------------------------
// nsHttpChannel::nsIResumableChannel
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsHttpChannel::ResumeAt(uint64_t aStartPos,
const nsACString& aEntityID)
{
LOG(("nsHttpChannel::ResumeAt [this=%p startPos=%llu id='%s']\n",
this, aStartPos, PromiseFlatCString(aEntityID).get()));
mEntityID = aEntityID;
mStartPos = aStartPos;
mResuming = true;
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsHttpChannel::nsICacheListener
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsHttpChannel::OnCacheEntryAvailable(nsICacheEntryDescriptor *entry,
nsCacheAccessMode access,
nsresult status)
{
MOZ_ASSERT(NS_IsMainThread());
nsresult rv;
LOG(("nsHttpChannel::OnCacheEntryAvailable [this=%p entry=%p "
"access=%x status=%x]\n", this, entry, access, status));
if (mCacheQuery) {
mRequestHead = mCacheQuery->mRequestHead;
mRedirectedCachekeys = mCacheQuery->mRedirectedCachekeys.forget();
mCacheInputStream.takeOver(mCacheQuery->mCacheInputStream);
mCachedResponseHead = mCacheQuery->mCachedResponseHead.forget();
mCachedSecurityInfo = mCacheQuery->mCachedSecurityInfo.forget();
mCachedContentIsValid = mCacheQuery->mCachedContentIsValid;
mCachedContentIsPartial = mCacheQuery->mCachedContentIsPartial;
mCustomConditionalRequest = mCacheQuery->mCustomConditionalRequest;
mDidReval = mCacheQuery->mDidReval;
mCacheEntryDeviceTelemetryID = mCacheQuery->mCacheEntryDeviceTelemetryID;
mCacheQuery = nullptr;
}
// if the channel's already fired onStopRequest, then we should ignore
// this event.
if (!mIsPending) {
mCacheInputStream.CloseAndRelease();
return NS_OK;
}
rv = OnCacheEntryAvailableInternal(entry, access, status);
if (NS_FAILED(rv)) {
CloseCacheEntry(true);
AsyncAbort(rv);
}
return NS_OK;
}
nsresult
nsHttpChannel::OnCacheEntryAvailableInternal(nsICacheEntryDescriptor *entry,
nsCacheAccessMode access,
nsresult status)
{
nsresult rv;
nsOnCacheEntryAvailableCallback callback = mOnCacheEntryAvailableCallback;
mOnCacheEntryAvailableCallback = nullptr;
NS_ASSERTION(callback,
"nsHttpChannel::OnCacheEntryAvailable called without callback");
rv = ((*this).*callback)(entry, access, status);
if (mOnCacheEntryAvailableCallback) {
// callback fired another async open
NS_ASSERTION(NS_SUCCEEDED(rv), "Unexpected state");
return NS_OK;
}
if (callback != &nsHttpChannel::OnOfflineCacheEntryForWritingAvailable) {
if (NS_FAILED(rv)) {
LOG(("AsyncOpenCacheEntry failed [rv=%x]\n", rv));
if (mLoadFlags & LOAD_ONLY_FROM_CACHE) {
// If we have a fallback URI (and we're not already
// falling back), process the fallback asynchronously.
if (!mFallbackChannel && !mFallbackKey.IsEmpty()) {
return AsyncCall(&nsHttpChannel::HandleAsyncFallback);
}
return NS_ERROR_DOCUMENT_NOT_CACHED;
}
if (mCanceled)
// If the request was canceled then don't continue without using
// the cache entry. See bug #764337
return rv;
// proceed without using the cache
}
// if app cache for write has been set, open up an offline cache entry
// to update
if (mApplicationCacheForWrite) {
rv = OpenOfflineCacheEntryForWriting();
if (mOnCacheEntryAvailableCallback) {
NS_ASSERTION(NS_SUCCEEDED(rv), "Unexpected state");
return NS_OK;
}
if (NS_FAILED(rv))
return rv;
}
} else {
// check result of OnOfflineCacheEntryForWritingAvailable()
if (NS_FAILED(rv))
return rv;
}
return ContinueConnect();
}
NS_IMETHODIMP
nsHttpChannel::OnCacheEntryDoomed(nsresult status)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
nsresult
nsHttpChannel::DoAuthRetry(nsAHttpConnection *conn)
{
LOG(("nsHttpChannel::DoAuthRetry [this=%p]\n", this));
NS_ASSERTION(!mTransaction, "should not have a transaction");
nsresult rv;
// toggle mIsPending to allow nsIObserver implementations to modify
// the request headers (bug 95044).
mIsPending = false;
// fetch cookies, and add them to the request header.
// the server response could have included cookies that must be sent with
// this authentication attempt (bug 84794).
// TODO: save cookies from auth response and send them here (bug 572151).
AddCookiesToRequest();
// notify "http-on-modify-request" observers
gHttpHandler->OnModifyRequest(this);
mIsPending = true;
// get rid of the old response headers
mResponseHead = nullptr;
// set sticky connection flag and disable pipelining.
mCaps |= NS_HTTP_STICKY_CONNECTION;
mCaps &= ~NS_HTTP_ALLOW_PIPELINING;
// and create a new one...
rv = SetupTransaction();
if (NS_FAILED(rv)) return rv;
// transfer ownership of connection to transaction
if (conn)
mTransaction->SetConnection(conn);
// rewind the upload stream
if (mUploadStream) {
nsCOMPtr<nsISeekableStream> seekable = do_QueryInterface(mUploadStream);
if (seekable)
seekable->Seek(nsISeekableStream::NS_SEEK_SET, 0);
}
rv = gHttpHandler->InitiateTransaction(mTransaction, mPriority);
if (NS_FAILED(rv)) return rv;
rv = mTransactionPump->AsyncRead(this, nullptr);
if (NS_FAILED(rv)) return rv;
uint32_t suspendCount = mSuspendCount;
while (suspendCount--)
mTransactionPump->Suspend();
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsHttpChannel::nsIApplicationCacheChannel
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsHttpChannel::GetApplicationCache(nsIApplicationCache **out)
{
NS_IF_ADDREF(*out = mApplicationCache);
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::SetApplicationCache(nsIApplicationCache *appCache)
{
ENSURE_CALLED_BEFORE_ASYNC_OPEN();
mApplicationCache = appCache;
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::GetApplicationCacheForWrite(nsIApplicationCache **out)
{
NS_IF_ADDREF(*out = mApplicationCacheForWrite);
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::SetApplicationCacheForWrite(nsIApplicationCache *appCache)
{
ENSURE_CALLED_BEFORE_ASYNC_OPEN();
mApplicationCacheForWrite = appCache;
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::GetLoadedFromApplicationCache(bool *aLoadedFromApplicationCache)
{
*aLoadedFromApplicationCache = mLoadedFromApplicationCache;
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::GetInheritApplicationCache(bool *aInherit)
{
*aInherit = mInheritApplicationCache;
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::SetInheritApplicationCache(bool aInherit)
{
ENSURE_CALLED_BEFORE_ASYNC_OPEN();
mInheritApplicationCache = aInherit;
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::GetChooseApplicationCache(bool *aChoose)
{
*aChoose = mChooseApplicationCache;
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::SetChooseApplicationCache(bool aChoose)
{
ENSURE_CALLED_BEFORE_ASYNC_OPEN();
mChooseApplicationCache = aChoose;
return NS_OK;
}
nsHttpChannel::OfflineCacheEntryAsForeignMarker*
nsHttpChannel::GetOfflineCacheEntryAsForeignMarker()
{
if (!mApplicationCache)
return nullptr;
nsresult rv;
nsAutoCString cacheKey;
rv = GenerateCacheKey(mPostID, cacheKey);
NS_ENSURE_SUCCESS(rv, nullptr);
return new OfflineCacheEntryAsForeignMarker(mApplicationCache, cacheKey);
}
nsresult
nsHttpChannel::OfflineCacheEntryAsForeignMarker::MarkAsForeign()
{
return mApplicationCache->MarkEntry(mCacheKey,
nsIApplicationCache::ITEM_FOREIGN);
}
NS_IMETHODIMP
nsHttpChannel::MarkOfflineCacheEntryAsForeign()
{
nsresult rv;
nsAutoPtr<OfflineCacheEntryAsForeignMarker> marker(
GetOfflineCacheEntryAsForeignMarker());
if (!marker)
return NS_ERROR_NOT_AVAILABLE;
rv = marker->MarkAsForeign();
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsHttpChannel::nsIAsyncVerifyRedirectCallback
//-----------------------------------------------------------------------------
nsresult
nsHttpChannel::WaitForRedirectCallback()
{
nsresult rv;
LOG(("nsHttpChannel::WaitForRedirectCallback [this=%p]\n", this));
if (mTransactionPump) {
rv = mTransactionPump->Suspend();
NS_ENSURE_SUCCESS(rv, rv);
}
if (mCachePump) {
rv = mCachePump->Suspend();
if (NS_FAILED(rv) && mTransactionPump) {
#ifdef DEBUG
nsresult resume =
#endif
mTransactionPump->Resume();
NS_ASSERTION(NS_SUCCEEDED(resume),
"Failed to resume transaction pump");
}
NS_ENSURE_SUCCESS(rv, rv);
}
mWaitingForRedirectCallback = true;
return NS_OK;
}
NS_IMETHODIMP
nsHttpChannel::OnRedirectVerifyCallback(nsresult result)
{
LOG(("nsHttpChannel::OnRedirectVerifyCallback [this=%p] "
"result=%x stack=%d mWaitingForRedirectCallback=%u\n",
this, result, mRedirectFuncStack.Length(), mWaitingForRedirectCallback));
NS_ASSERTION(mWaitingForRedirectCallback,
"Someone forgot to call WaitForRedirectCallback() ?!");
mWaitingForRedirectCallback = false;
if (mCanceled && NS_SUCCEEDED(result))
result = NS_BINDING_ABORTED;
for (uint32_t i = mRedirectFuncStack.Length(); i > 0;) {
--i;
// Pop the last function pushed to the stack
nsContinueRedirectionFunc func = mRedirectFuncStack[i];
mRedirectFuncStack.RemoveElementAt(mRedirectFuncStack.Length() - 1);
// Call it with the result we got from the callback or the deeper
// function call.
result = (this->*func)(result);
// If a new function has been pushed to the stack and placed us in the
// waiting state, we need to break the chain and wait for the callback
// again.
if (mWaitingForRedirectCallback)
break;
}
if (NS_FAILED(result) && !mCanceled) {
// First, cancel this channel if we are in failure state to set mStatus
// and let it be propagated to pumps.
Cancel(result);
}
if (!mWaitingForRedirectCallback) {
// We are not waiting for the callback. At this moment we must release
// reference to the redirect target channel, otherwise we may leak.
mRedirectChannel = nullptr;
}
// We always resume the pumps here. If all functions on stack have been
// called we need OnStopRequest to be triggered, and if we broke out of the
// loop above (and are thus waiting for a new callback) the suspension
// count must be balanced in the pumps.
if (mTransactionPump)
mTransactionPump->Resume();
if (mCachePump)
mCachePump->Resume();
return result;
}
void
nsHttpChannel::PushRedirectAsyncFunc(nsContinueRedirectionFunc func)
{
mRedirectFuncStack.AppendElement(func);
}
void
nsHttpChannel::PopRedirectAsyncFunc(nsContinueRedirectionFunc func)
{
NS_ASSERTION(func == mRedirectFuncStack[mRedirectFuncStack.Length() - 1],
"Trying to pop wrong method from redirect async stack!");
mRedirectFuncStack.TruncateLength(mRedirectFuncStack.Length() - 1);
}
//-----------------------------------------------------------------------------
// nsHttpChannel internal functions
//-----------------------------------------------------------------------------
void
nsHttpChannel::MaybeInvalidateCacheEntryForSubsequentGet()
{
// See RFC 2616 section 5.1.1. These are considered valid
// methods which DO NOT invalidate cache-entries for the
// referred resource. POST, PUT and DELETE as well as any
// other method not listed here will potentially invalidate
// any cached copy of the resource
if (mRequestHead.Method() == nsHttp::Options ||
mRequestHead.Method() == nsHttp::Get ||
mRequestHead.Method() == nsHttp::Head ||
mRequestHead.Method() == nsHttp::Trace ||
mRequestHead.Method() == nsHttp::Connect)
return;
// Invalidate the request-uri.
// Pass 0 in first param to get the cache-key for a GET-request.
nsAutoCString tmpCacheKey;
GenerateCacheKey(0, tmpCacheKey);
LOG(("MaybeInvalidateCacheEntryForSubsequentGet [this=%p uri=%s]\n",
this, tmpCacheKey.get()));
DoInvalidateCacheEntry(tmpCacheKey);
// Invalidate Location-header if set
const char *location = mResponseHead->PeekHeader(nsHttp::Location);
if (location) {
LOG((" Location-header=%s\n", location));
InvalidateCacheEntryForLocation(location);
}
// Invalidate Content-Location-header if set
location = mResponseHead->PeekHeader(nsHttp::Content_Location);
if (location) {
LOG((" Content-Location-header=%s\n", location));
InvalidateCacheEntryForLocation(location);
}
}
void
nsHttpChannel::InvalidateCacheEntryForLocation(const char *location)
{
nsAutoCString tmpCacheKey, tmpSpec;
nsCOMPtr<nsIURI> resultingURI;
nsresult rv = CreateNewURI(location, getter_AddRefs(resultingURI));
if (NS_SUCCEEDED(rv) && HostPartIsTheSame(resultingURI)) {
if (NS_SUCCEEDED(resultingURI->GetAsciiSpec(tmpSpec))) {
location = tmpSpec.get(); //reusing |location|
// key for a GET-request to |location| with current load-flags
AssembleCacheKey(location, 0, tmpCacheKey);
DoInvalidateCacheEntry(tmpCacheKey);
} else
NS_WARNING((" failed getting ascii-spec\n"));
} else {
LOG((" hosts not matching\n"));
}
}
void
nsHttpChannel::DoInvalidateCacheEntry(const nsCString &key)
{
// NOTE:
// Following comments 24,32 and 33 in bug #327765, we only care about
// the cache in the protocol-handler, not the application cache.
// The logic below deviates from the original logic in OpenCacheEntry on
// one point by using only READ_ONLY access-policy. I think this is safe.
// First, find session holding the cache-entry - use current storage-policy
nsCacheStoragePolicy storagePolicy = DetermineStoragePolicy();
const char * clientID =
GetCacheSessionNameForStoragePolicy(storagePolicy, mPrivateBrowsing);
LOG(("DoInvalidateCacheEntry [channel=%p session=%s policy=%d key=%s]",
this, clientID, int(storagePolicy), key.get()));
nsresult rv;
nsCOMPtr<nsICacheService> serv =
do_GetService(NS_CACHESERVICE_CONTRACTID, &rv);
nsCOMPtr<nsICacheSession> session;
if (NS_SUCCEEDED(rv)) {
rv = serv->CreateSession(clientID, storagePolicy,
nsICache::STREAM_BASED,
getter_AddRefs(session));
}
if (NS_SUCCEEDED(rv)) {
rv = session->SetIsPrivate(mPrivateBrowsing);
}
if (NS_SUCCEEDED(rv)) {
rv = session->DoomEntry(key, nullptr);
}
LOG(("DoInvalidateCacheEntry [channel=%p session=%s policy=%d key=%s rv=%d]",
this, clientID, int(storagePolicy), key.get(), int(rv)));
}
nsCacheStoragePolicy
nsHttpChannel::DetermineStoragePolicy()
{
nsCacheStoragePolicy policy = nsICache::STORE_ANYWHERE;
if (mPrivateBrowsing)
policy = nsICache::STORE_IN_MEMORY;
else if (mLoadFlags & INHIBIT_PERSISTENT_CACHING)
policy = nsICache::STORE_IN_MEMORY;
return policy;
}
nsresult
nsHttpChannel::DetermineCacheAccess(nsCacheAccessMode *_retval)
{
bool offline = gIOService->IsOffline();
if (offline || (mLoadFlags & INHIBIT_CACHING)) {
// If we have been asked to bypass the cache and not write to the
// cache, then don't use the cache at all. Unless we're actually
// offline, which takes precedence over BYPASS_LOCAL_CACHE.
if (BYPASS_LOCAL_CACHE(mLoadFlags) && !offline)
return NS_ERROR_NOT_AVAILABLE;
*_retval = nsICache::ACCESS_READ;
}
else if (BYPASS_LOCAL_CACHE(mLoadFlags))
*_retval = nsICache::ACCESS_WRITE; // replace cache entry
else
*_retval = nsICache::ACCESS_READ_WRITE; // normal browsing
return NS_OK;
}
void
nsHttpChannel::AsyncOnExamineCachedResponse()
{
gHttpHandler->OnExamineCachedResponse(this);
}
} } // namespace mozilla::net
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