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gecko/uriloader/prefetch/nsOfflineCacheUpdate.cpp
Ehsan Akhgari 2a602a5685 Bug 690892 - Replace PR_TRUE/PR_FALSE with true/false on mozilla-central; rs=dbaron 
Landing on a CLOSED TREE
2011-10-17 10:59:28 -04:00

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/* -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Mozilla Corporation
* Portions created by the Initial Developer are Copyright (C) 2007
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Dave Camp <dcamp@mozilla.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsOfflineCacheUpdate.h"
#include "nsCPrefetchService.h"
#include "nsCURILoader.h"
#include "nsIApplicationCacheContainer.h"
#include "nsIApplicationCacheChannel.h"
#include "nsIApplicationCacheService.h"
#include "nsICache.h"
#include "nsICacheService.h"
#include "nsICacheSession.h"
#include "nsICachingChannel.h"
#include "nsIContent.h"
#include "mozilla/dom/Element.h"
#include "nsIDocumentLoader.h"
#include "nsIDOMElement.h"
#include "nsIDOMWindow.h"
#include "nsIDOMOfflineResourceList.h"
#include "nsIDocument.h"
#include "nsIObserverService.h"
#include "nsIURL.h"
#include "nsIWebProgress.h"
#include "nsICryptoHash.h"
#include "nsICacheEntryDescriptor.h"
#include "nsIPermissionManager.h"
#include "nsIPrincipal.h"
#include "nsNetCID.h"
#include "nsNetUtil.h"
#include "nsServiceManagerUtils.h"
#include "nsStreamUtils.h"
#include "nsThreadUtils.h"
#include "nsProxyRelease.h"
#include "prlog.h"
#include "nsIAsyncVerifyRedirectCallback.h"
#include "mozilla/Preferences.h"
#include "nsXULAppAPI.h"
using namespace mozilla;
static const PRUint32 kRescheduleLimit = 3;
#if defined(PR_LOGGING)
//
// To enable logging (see prlog.h for full details):
//
// set NSPR_LOG_MODULES=nsOfflineCacheUpdate:5
// set NSPR_LOG_FILE=offlineupdate.log
//
// this enables PR_LOG_ALWAYS level information and places all output in
// the file offlineupdate.log
//
extern PRLogModuleInfo *gOfflineCacheUpdateLog;
#endif
#define LOG(args) PR_LOG(gOfflineCacheUpdateLog, 4, args)
#define LOG_ENABLED() PR_LOG_TEST(gOfflineCacheUpdateLog, 4)
class AutoFreeArray {
public:
AutoFreeArray(PRUint32 count, char **values)
: mCount(count), mValues(values) {};
~AutoFreeArray() { NS_FREE_XPCOM_ALLOCATED_POINTER_ARRAY(mCount, mValues); }
private:
PRUint32 mCount;
char **mValues;
};
static nsresult
DropReferenceFromURL(nsIURI * aURI)
{
// XXXdholbert If this SetRef fails, callers of this method probably
// want to call aURI->CloneIgnoringRef() and use the result of that.
return aURI->SetRef(EmptyCString());
}
//-----------------------------------------------------------------------------
// nsManifestCheck
//-----------------------------------------------------------------------------
class nsManifestCheck : public nsIStreamListener
, public nsIChannelEventSink
, public nsIInterfaceRequestor
{
public:
nsManifestCheck(nsOfflineCacheUpdate *aUpdate,
nsIURI *aURI,
nsIURI *aReferrerURI)
: mUpdate(aUpdate)
, mURI(aURI)
, mReferrerURI(aReferrerURI)
{}
NS_DECL_ISUPPORTS
NS_DECL_NSIREQUESTOBSERVER
NS_DECL_NSISTREAMLISTENER
NS_DECL_NSICHANNELEVENTSINK
NS_DECL_NSIINTERFACEREQUESTOR
nsresult Begin();
private:
static NS_METHOD ReadManifest(nsIInputStream *aInputStream,
void *aClosure,
const char *aFromSegment,
PRUint32 aOffset,
PRUint32 aCount,
PRUint32 *aBytesConsumed);
nsRefPtr<nsOfflineCacheUpdate> mUpdate;
nsCOMPtr<nsIURI> mURI;
nsCOMPtr<nsIURI> mReferrerURI;
nsCOMPtr<nsICryptoHash> mManifestHash;
nsCOMPtr<nsIChannel> mChannel;
};
//-----------------------------------------------------------------------------
// nsManifestCheck::nsISupports
//-----------------------------------------------------------------------------
NS_IMPL_ISUPPORTS4(nsManifestCheck,
nsIRequestObserver,
nsIStreamListener,
nsIChannelEventSink,
nsIInterfaceRequestor)
//-----------------------------------------------------------------------------
// nsManifestCheck <public>
//-----------------------------------------------------------------------------
nsresult
nsManifestCheck::Begin()
{
nsresult rv;
mManifestHash = do_CreateInstance("@mozilla.org/security/hash;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = mManifestHash->Init(nsICryptoHash::MD5);
NS_ENSURE_SUCCESS(rv, rv);
rv = NS_NewChannel(getter_AddRefs(mChannel),
mURI,
nsnull, nsnull, nsnull,
nsIRequest::LOAD_BYPASS_CACHE);
NS_ENSURE_SUCCESS(rv, rv);
// configure HTTP specific stuff
nsCOMPtr<nsIHttpChannel> httpChannel =
do_QueryInterface(mChannel);
if (httpChannel) {
httpChannel->SetReferrer(mReferrerURI);
httpChannel->SetRequestHeader(NS_LITERAL_CSTRING("X-Moz"),
NS_LITERAL_CSTRING("offline-resource"),
false);
}
rv = mChannel->AsyncOpen(this, nsnull);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsManifestCheck <public>
//-----------------------------------------------------------------------------
/* static */
NS_METHOD
nsManifestCheck::ReadManifest(nsIInputStream *aInputStream,
void *aClosure,
const char *aFromSegment,
PRUint32 aOffset,
PRUint32 aCount,
PRUint32 *aBytesConsumed)
{
nsManifestCheck *manifestCheck =
static_cast<nsManifestCheck*>(aClosure);
nsresult rv;
*aBytesConsumed = aCount;
rv = manifestCheck->mManifestHash->Update(
reinterpret_cast<const PRUint8 *>(aFromSegment), aCount);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsManifestCheck::nsIStreamListener
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsManifestCheck::OnStartRequest(nsIRequest *aRequest,
nsISupports *aContext)
{
return NS_OK;
}
NS_IMETHODIMP
nsManifestCheck::OnDataAvailable(nsIRequest *aRequest,
nsISupports *aContext,
nsIInputStream *aStream,
PRUint32 aOffset,
PRUint32 aCount)
{
PRUint32 bytesRead;
aStream->ReadSegments(ReadManifest, this, aCount, &bytesRead);
return NS_OK;
}
NS_IMETHODIMP
nsManifestCheck::OnStopRequest(nsIRequest *aRequest,
nsISupports *aContext,
nsresult aStatus)
{
nsCAutoString manifestHash;
if (NS_SUCCEEDED(aStatus)) {
mManifestHash->Finish(true, manifestHash);
}
mUpdate->ManifestCheckCompleted(aStatus, manifestHash);
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsManifestCheck::nsIInterfaceRequestor
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsManifestCheck::GetInterface(const nsIID &aIID, void **aResult)
{
if (aIID.Equals(NS_GET_IID(nsIChannelEventSink))) {
NS_ADDREF_THIS();
*aResult = static_cast<nsIChannelEventSink *>(this);
return NS_OK;
}
return NS_ERROR_NO_INTERFACE;
}
//-----------------------------------------------------------------------------
// nsManifestCheck::nsIChannelEventSink
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsManifestCheck::AsyncOnChannelRedirect(nsIChannel *aOldChannel,
nsIChannel *aNewChannel,
PRUint32 aFlags,
nsIAsyncVerifyRedirectCallback *callback)
{
// Redirects should cause the load (and therefore the update) to fail.
if (aFlags & nsIChannelEventSink::REDIRECT_INTERNAL) {
callback->OnRedirectVerifyCallback(NS_OK);
return NS_OK;
}
aOldChannel->Cancel(NS_ERROR_ABORT);
return NS_ERROR_ABORT;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateItem::nsISupports
//-----------------------------------------------------------------------------
NS_IMPL_ISUPPORTS6(nsOfflineCacheUpdateItem,
nsIDOMLoadStatus,
nsIRequestObserver,
nsIStreamListener,
nsIRunnable,
nsIInterfaceRequestor,
nsIChannelEventSink)
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateItem <public>
//-----------------------------------------------------------------------------
nsOfflineCacheUpdateItem::nsOfflineCacheUpdateItem(nsOfflineCacheUpdate *aUpdate,
nsIURI *aURI,
nsIURI *aReferrerURI,
nsIApplicationCache *aPreviousApplicationCache,
const nsACString &aClientID,
PRUint32 type)
: mURI(aURI)
, mReferrerURI(aReferrerURI)
, mPreviousApplicationCache(aPreviousApplicationCache)
, mClientID(aClientID)
, mItemType(type)
, mUpdate(aUpdate)
, mChannel(nsnull)
, mState(nsIDOMLoadStatus::UNINITIALIZED)
, mBytesRead(0)
{
}
nsOfflineCacheUpdateItem::~nsOfflineCacheUpdateItem()
{
}
nsresult
nsOfflineCacheUpdateItem::OpenChannel()
{
#if defined(PR_LOGGING)
if (LOG_ENABLED()) {
nsCAutoString spec;
mURI->GetSpec(spec);
LOG(("%p: Opening channel for %s", this, spec.get()));
}
#endif
nsresult rv = nsOfflineCacheUpdate::GetCacheKey(mURI, mCacheKey);
NS_ENSURE_SUCCESS(rv, rv);
rv = NS_NewChannel(getter_AddRefs(mChannel),
mURI,
nsnull, nsnull, this,
nsIRequest::LOAD_BACKGROUND |
nsICachingChannel::LOAD_ONLY_IF_MODIFIED |
nsICachingChannel::LOAD_CHECK_OFFLINE_CACHE);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIApplicationCacheChannel> appCacheChannel =
do_QueryInterface(mChannel, &rv);
// Support for nsIApplicationCacheChannel is required.
NS_ENSURE_SUCCESS(rv, rv);
// Use the existing application cache as the cache to check.
rv = appCacheChannel->SetApplicationCache(mPreviousApplicationCache);
NS_ENSURE_SUCCESS(rv, rv);
// configure HTTP specific stuff
nsCOMPtr<nsIHttpChannel> httpChannel =
do_QueryInterface(mChannel);
if (httpChannel) {
httpChannel->SetReferrer(mReferrerURI);
httpChannel->SetRequestHeader(NS_LITERAL_CSTRING("X-Moz"),
NS_LITERAL_CSTRING("offline-resource"),
false);
}
nsCOMPtr<nsICachingChannel> cachingChannel =
do_QueryInterface(mChannel);
if (cachingChannel) {
rv = cachingChannel->SetCacheForOfflineUse(true);
NS_ENSURE_SUCCESS(rv, rv);
if (!mClientID.IsEmpty()) {
rv = cachingChannel->SetOfflineCacheClientID(mClientID);
NS_ENSURE_SUCCESS(rv, rv);
}
}
rv = mChannel->AsyncOpen(this, nsnull);
NS_ENSURE_SUCCESS(rv, rv);
mState = nsIDOMLoadStatus::REQUESTED;
return NS_OK;
}
nsresult
nsOfflineCacheUpdateItem::Cancel()
{
if (mChannel) {
mChannel->Cancel(NS_ERROR_ABORT);
mChannel = nsnull;
}
mState = nsIDOMLoadStatus::UNINITIALIZED;
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateItem::nsIStreamListener
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsOfflineCacheUpdateItem::OnStartRequest(nsIRequest *aRequest,
nsISupports *aContext)
{
mState = nsIDOMLoadStatus::RECEIVING;
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateItem::OnDataAvailable(nsIRequest *aRequest,
nsISupports *aContext,
nsIInputStream *aStream,
PRUint32 aOffset,
PRUint32 aCount)
{
PRUint32 bytesRead = 0;
aStream->ReadSegments(NS_DiscardSegment, nsnull, aCount, &bytesRead);
mBytesRead += bytesRead;
LOG(("loaded %u bytes into offline cache [offset=%u]\n",
bytesRead, aOffset));
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateItem::OnStopRequest(nsIRequest *aRequest,
nsISupports *aContext,
nsresult aStatus)
{
LOG(("done fetching offline item [status=%x]\n", aStatus));
mState = nsIDOMLoadStatus::LOADED;
if (mBytesRead == 0 && aStatus == NS_OK) {
// we didn't need to read (because LOAD_ONLY_IF_MODIFIED was
// specified), but the object should report loadedSize as if it
// did.
mChannel->GetContentLength(&mBytesRead);
}
// We need to notify the update that the load is complete, but we
// want to give the channel a chance to close the cache entries.
NS_DispatchToCurrentThread(this);
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateItem::nsIRunnable
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsOfflineCacheUpdateItem::Run()
{
mUpdate->LoadCompleted();
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateItem::nsIInterfaceRequestor
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsOfflineCacheUpdateItem::GetInterface(const nsIID &aIID, void **aResult)
{
if (aIID.Equals(NS_GET_IID(nsIChannelEventSink))) {
NS_ADDREF_THIS();
*aResult = static_cast<nsIChannelEventSink *>(this);
return NS_OK;
}
return NS_ERROR_NO_INTERFACE;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateItem::nsIChannelEventSink
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsOfflineCacheUpdateItem::AsyncOnChannelRedirect(nsIChannel *aOldChannel,
nsIChannel *aNewChannel,
PRUint32 aFlags,
nsIAsyncVerifyRedirectCallback *cb)
{
if (!(aFlags & nsIChannelEventSink::REDIRECT_INTERNAL)) {
// Don't allow redirect in case of non-internal redirect and cancel
// the channel to clean the cache entry.
aOldChannel->Cancel(NS_ERROR_ABORT);
return NS_ERROR_ABORT;
}
nsCOMPtr<nsIURI> newURI;
nsresult rv = aNewChannel->GetURI(getter_AddRefs(newURI));
if (NS_FAILED(rv))
return rv;
nsCOMPtr<nsICachingChannel> newCachingChannel =
do_QueryInterface(aNewChannel);
if (newCachingChannel) {
rv = newCachingChannel->SetCacheForOfflineUse(true);
NS_ENSURE_SUCCESS(rv, rv);
if (!mClientID.IsEmpty()) {
rv = newCachingChannel->SetOfflineCacheClientID(mClientID);
NS_ENSURE_SUCCESS(rv, rv);
}
}
nsCAutoString oldScheme;
mURI->GetScheme(oldScheme);
bool match;
if (NS_FAILED(newURI->SchemeIs(oldScheme.get(), &match)) || !match) {
LOG(("rejected: redirected to a different scheme\n"));
return NS_ERROR_ABORT;
}
// HTTP request headers are not automatically forwarded to the new channel.
nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(aNewChannel);
NS_ENSURE_STATE(httpChannel);
httpChannel->SetRequestHeader(NS_LITERAL_CSTRING("X-Moz"),
NS_LITERAL_CSTRING("offline-resource"),
false);
mChannel = aNewChannel;
cb->OnRedirectVerifyCallback(NS_OK);
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateItem::nsIDOMLoadStatus
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsOfflineCacheUpdateItem::GetSource(nsIDOMNode **aSource)
{
*aSource = nsnull;
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateItem::GetUri(nsAString &aURI)
{
nsCAutoString spec;
nsresult rv = mURI->GetSpec(spec);
NS_ENSURE_SUCCESS(rv, rv);
CopyUTF8toUTF16(spec, aURI);
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateItem::GetTotalSize(PRInt32 *aTotalSize)
{
if (mChannel) {
return mChannel->GetContentLength(aTotalSize);
}
*aTotalSize = -1;
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateItem::GetLoadedSize(PRInt32 *aLoadedSize)
{
*aLoadedSize = mBytesRead;
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateItem::GetReadyState(PRUint16 *aReadyState)
{
*aReadyState = mState;
return NS_OK;
}
nsresult
nsOfflineCacheUpdateItem::GetRequestSucceeded(bool * succeeded)
{
*succeeded = false;
if (!mChannel)
return NS_OK;
nsresult rv;
nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(mChannel, &rv);
NS_ENSURE_SUCCESS(rv, rv);
bool reqSucceeded;
rv = httpChannel->GetRequestSucceeded(&reqSucceeded);
if (NS_ERROR_NOT_AVAILABLE == rv)
return NS_OK;
NS_ENSURE_SUCCESS(rv, rv);
if (!reqSucceeded) {
LOG(("Request failed"));
return NS_OK;
}
nsresult channelStatus;
rv = httpChannel->GetStatus(&channelStatus);
NS_ENSURE_SUCCESS(rv, rv);
if (NS_FAILED(channelStatus)) {
LOG(("Channel status=0x%08x", channelStatus));
return NS_OK;
}
*succeeded = true;
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateItem::GetStatus(PRUint16 *aStatus)
{
if (!mChannel) {
*aStatus = 0;
return NS_OK;
}
nsresult rv;
nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(mChannel, &rv);
NS_ENSURE_SUCCESS(rv, rv);
PRUint32 httpStatus;
rv = httpChannel->GetResponseStatus(&httpStatus);
if (rv == NS_ERROR_NOT_AVAILABLE) {
*aStatus = 0;
return NS_OK;
}
NS_ENSURE_SUCCESS(rv, rv);
*aStatus = PRUint16(httpStatus);
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsOfflineManifestItem
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// nsOfflineManifestItem <public>
//-----------------------------------------------------------------------------
nsOfflineManifestItem::nsOfflineManifestItem(nsOfflineCacheUpdate *aUpdate,
nsIURI *aURI,
nsIURI *aReferrerURI,
nsIApplicationCache *aPreviousApplicationCache,
const nsACString &aClientID)
: nsOfflineCacheUpdateItem(aUpdate, aURI, aReferrerURI,
aPreviousApplicationCache, aClientID,
nsIApplicationCache::ITEM_MANIFEST)
, mParserState(PARSE_INIT)
, mNeedsUpdate(true)
, mManifestHashInitialized(false)
{
ReadStrictFileOriginPolicyPref();
}
nsOfflineManifestItem::~nsOfflineManifestItem()
{
}
//-----------------------------------------------------------------------------
// nsOfflineManifestItem <private>
//-----------------------------------------------------------------------------
/* static */
NS_METHOD
nsOfflineManifestItem::ReadManifest(nsIInputStream *aInputStream,
void *aClosure,
const char *aFromSegment,
PRUint32 aOffset,
PRUint32 aCount,
PRUint32 *aBytesConsumed)
{
nsOfflineManifestItem *manifest =
static_cast<nsOfflineManifestItem*>(aClosure);
nsresult rv;
*aBytesConsumed = aCount;
if (manifest->mParserState == PARSE_ERROR) {
// parse already failed, ignore this
return NS_OK;
}
if (!manifest->mManifestHashInitialized) {
// Avoid re-creation of crypto hash when it fails from some reason the first time
manifest->mManifestHashInitialized = true;
manifest->mManifestHash = do_CreateInstance("@mozilla.org/security/hash;1", &rv);
if (NS_SUCCEEDED(rv)) {
rv = manifest->mManifestHash->Init(nsICryptoHash::MD5);
if (NS_FAILED(rv)) {
manifest->mManifestHash = nsnull;
LOG(("Could not initialize manifest hash for byte-to-byte check, rv=%08x", rv));
}
}
}
if (manifest->mManifestHash) {
rv = manifest->mManifestHash->Update(reinterpret_cast<const PRUint8 *>(aFromSegment), aCount);
if (NS_FAILED(rv)) {
manifest->mManifestHash = nsnull;
LOG(("Could not update manifest hash, rv=%08x", rv));
}
}
manifest->mReadBuf.Append(aFromSegment, aCount);
nsCString::const_iterator begin, iter, end;
manifest->mReadBuf.BeginReading(begin);
manifest->mReadBuf.EndReading(end);
for (iter = begin; iter != end; iter++) {
if (*iter == '\r' || *iter == '\n') {
nsresult rv = manifest->HandleManifestLine(begin, iter);
if (NS_FAILED(rv)) {
LOG(("HandleManifestLine failed with 0x%08x", rv));
return NS_ERROR_ABORT;
}
begin = iter;
begin++;
}
}
// any leftovers are saved for next time
manifest->mReadBuf = Substring(begin, end);
return NS_OK;
}
nsresult
nsOfflineManifestItem::AddNamespace(PRUint32 namespaceType,
const nsCString &namespaceSpec,
const nsCString &data)
{
nsresult rv;
if (!mNamespaces) {
mNamespaces = do_CreateInstance(NS_ARRAY_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
}
nsCOMPtr<nsIApplicationCacheNamespace> ns =
do_CreateInstance(NS_APPLICATIONCACHENAMESPACE_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = ns->Init(namespaceType, namespaceSpec, data);
NS_ENSURE_SUCCESS(rv, rv);
rv = mNamespaces->AppendElement(ns, false);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult
nsOfflineManifestItem::HandleManifestLine(const nsCString::const_iterator &aBegin,
const nsCString::const_iterator &aEnd)
{
nsCString::const_iterator begin = aBegin;
nsCString::const_iterator end = aEnd;
// all lines ignore trailing spaces and tabs
nsCString::const_iterator last = end;
--last;
while (end != begin && (*last == ' ' || *last == '\t')) {
--end;
--last;
}
if (mParserState == PARSE_INIT) {
// Allow a UTF-8 BOM
if (begin != end && static_cast<unsigned char>(*begin) == 0xef) {
if (++begin == end || static_cast<unsigned char>(*begin) != 0xbb ||
++begin == end || static_cast<unsigned char>(*begin) != 0xbf) {
mParserState = PARSE_ERROR;
return NS_OK;
}
++begin;
}
const nsCSubstring &magic = Substring(begin, end);
if (!magic.EqualsLiteral("CACHE MANIFEST")) {
mParserState = PARSE_ERROR;
return NS_OK;
}
mParserState = PARSE_CACHE_ENTRIES;
return NS_OK;
}
// lines other than the first ignore leading spaces and tabs
while (begin != end && (*begin == ' ' || *begin == '\t'))
begin++;
// ignore blank lines and comments
if (begin == end || *begin == '#')
return NS_OK;
const nsCSubstring &line = Substring(begin, end);
if (line.EqualsLiteral("CACHE:")) {
mParserState = PARSE_CACHE_ENTRIES;
return NS_OK;
}
if (line.EqualsLiteral("FALLBACK:")) {
mParserState = PARSE_FALLBACK_ENTRIES;
return NS_OK;
}
if (line.EqualsLiteral("NETWORK:")) {
mParserState = PARSE_BYPASS_ENTRIES;
return NS_OK;
}
nsresult rv;
switch(mParserState) {
case PARSE_INIT:
case PARSE_ERROR: {
// this should have been dealt with earlier
return NS_ERROR_FAILURE;
}
case PARSE_CACHE_ENTRIES: {
nsCOMPtr<nsIURI> uri;
rv = NS_NewURI(getter_AddRefs(uri), line, nsnull, mURI);
if (NS_FAILED(rv))
break;
if (NS_FAILED(DropReferenceFromURL(uri)))
break;
nsCAutoString scheme;
uri->GetScheme(scheme);
// Manifest URIs must have the same scheme as the manifest.
bool match;
if (NS_FAILED(mURI->SchemeIs(scheme.get(), &match)) || !match)
break;
mExplicitURIs.AppendObject(uri);
break;
}
case PARSE_FALLBACK_ENTRIES: {
PRInt32 separator = line.FindChar(' ');
if (separator == kNotFound) {
separator = line.FindChar('\t');
if (separator == kNotFound)
break;
}
nsCString namespaceSpec(Substring(line, 0, separator));
nsCString fallbackSpec(Substring(line, separator + 1));
namespaceSpec.CompressWhitespace();
fallbackSpec.CompressWhitespace();
nsCOMPtr<nsIURI> namespaceURI;
rv = NS_NewURI(getter_AddRefs(namespaceURI), namespaceSpec, nsnull, mURI);
if (NS_FAILED(rv))
break;
if (NS_FAILED(DropReferenceFromURL(namespaceURI)))
break;
rv = namespaceURI->GetAsciiSpec(namespaceSpec);
if (NS_FAILED(rv))
break;
nsCOMPtr<nsIURI> fallbackURI;
rv = NS_NewURI(getter_AddRefs(fallbackURI), fallbackSpec, nsnull, mURI);
if (NS_FAILED(rv))
break;
if (NS_FAILED(DropReferenceFromURL(fallbackURI)))
break;
rv = fallbackURI->GetAsciiSpec(fallbackSpec);
if (NS_FAILED(rv))
break;
// Manifest and namespace must be same origin
if (!NS_SecurityCompareURIs(mURI, namespaceURI,
mStrictFileOriginPolicy))
break;
// Fallback and namespace must be same origin
if (!NS_SecurityCompareURIs(namespaceURI, fallbackURI,
mStrictFileOriginPolicy))
break;
mFallbackURIs.AppendObject(fallbackURI);
AddNamespace(nsIApplicationCacheNamespace::NAMESPACE_FALLBACK,
namespaceSpec, fallbackSpec);
break;
}
case PARSE_BYPASS_ENTRIES: {
if (line[0] == '*' && (line.Length() == 1 || line[1] == ' ' || line[1] == '\t'))
{
// '*' indicates to make the online whitelist wildcard flag open,
// i.e. do allow load of resources not present in the offline cache
// or not conforming any namespace.
// We achive that simply by adding an 'empty' - i.e. universal
// namespace of BYPASS type into the cache.
AddNamespace(nsIApplicationCacheNamespace::NAMESPACE_BYPASS,
EmptyCString(), EmptyCString());
break;
}
nsCOMPtr<nsIURI> bypassURI;
rv = NS_NewURI(getter_AddRefs(bypassURI), line, nsnull, mURI);
if (NS_FAILED(rv))
break;
nsCAutoString scheme;
bypassURI->GetScheme(scheme);
bool equals;
if (NS_FAILED(mURI->SchemeIs(scheme.get(), &equals)) || !equals)
break;
if (NS_FAILED(DropReferenceFromURL(bypassURI)))
break;
nsCString spec;
if (NS_FAILED(bypassURI->GetAsciiSpec(spec)))
break;
AddNamespace(nsIApplicationCacheNamespace::NAMESPACE_BYPASS,
spec, EmptyCString());
break;
}
}
return NS_OK;
}
nsresult
nsOfflineManifestItem::GetOldManifestContentHash(nsIRequest *aRequest)
{
nsresult rv;
nsCOMPtr<nsICachingChannel> cachingChannel = do_QueryInterface(aRequest, &rv);
NS_ENSURE_SUCCESS(rv, rv);
// load the main cache token that is actually the old offline cache token and
// read previous manifest content hash value
nsCOMPtr<nsISupports> cacheToken;
cachingChannel->GetCacheToken(getter_AddRefs(cacheToken));
if (cacheToken) {
nsCOMPtr<nsICacheEntryDescriptor> cacheDescriptor(do_QueryInterface(cacheToken, &rv));
NS_ENSURE_SUCCESS(rv, rv);
rv = cacheDescriptor->GetMetaDataElement("offline-manifest-hash", getter_Copies(mOldManifestHashValue));
if (NS_FAILED(rv))
mOldManifestHashValue.Truncate();
}
return NS_OK;
}
nsresult
nsOfflineManifestItem::CheckNewManifestContentHash(nsIRequest *aRequest)
{
nsresult rv;
if (!mManifestHash) {
// Nothing to compare against...
return NS_OK;
}
nsCString newManifestHashValue;
rv = mManifestHash->Finish(true, mManifestHashValue);
mManifestHash = nsnull;
if (NS_FAILED(rv)) {
LOG(("Could not finish manifest hash, rv=%08x", rv));
// This is not critical error
return NS_OK;
}
if (!ParseSucceeded()) {
// Parsing failed, the hash is not valid
return NS_OK;
}
if (mOldManifestHashValue == mManifestHashValue) {
LOG(("Update not needed, downloaded manifest content is byte-for-byte identical"));
mNeedsUpdate = false;
}
// Store the manifest content hash value to the new
// offline cache token
nsCOMPtr<nsICachingChannel> cachingChannel = do_QueryInterface(aRequest, &rv);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsISupports> cacheToken;
cachingChannel->GetOfflineCacheToken(getter_AddRefs(cacheToken));
if (cacheToken) {
nsCOMPtr<nsICacheEntryDescriptor> cacheDescriptor(do_QueryInterface(cacheToken, &rv));
NS_ENSURE_SUCCESS(rv, rv);
rv = cacheDescriptor->SetMetaDataElement("offline-manifest-hash", mManifestHashValue.get());
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
void
nsOfflineManifestItem::ReadStrictFileOriginPolicyPref()
{
mStrictFileOriginPolicy =
Preferences::GetBool("security.fileuri.strict_origin_policy", true);
}
NS_IMETHODIMP
nsOfflineManifestItem::OnStartRequest(nsIRequest *aRequest,
nsISupports *aContext)
{
nsresult rv;
nsCOMPtr<nsIHttpChannel> channel = do_QueryInterface(aRequest, &rv);
NS_ENSURE_SUCCESS(rv, rv);
bool succeeded;
rv = channel->GetRequestSucceeded(&succeeded);
NS_ENSURE_SUCCESS(rv, rv);
if (!succeeded) {
LOG(("HTTP request failed"));
mParserState = PARSE_ERROR;
return NS_ERROR_ABORT;
}
nsCAutoString contentType;
rv = channel->GetContentType(contentType);
NS_ENSURE_SUCCESS(rv, rv);
if (!contentType.EqualsLiteral("text/cache-manifest")) {
LOG(("Rejected cache manifest with Content-Type %s (expecting text/cache-manifest)",
contentType.get()));
mParserState = PARSE_ERROR;
return NS_ERROR_ABORT;
}
rv = GetOldManifestContentHash(aRequest);
NS_ENSURE_SUCCESS(rv, rv);
return nsOfflineCacheUpdateItem::OnStartRequest(aRequest, aContext);
}
NS_IMETHODIMP
nsOfflineManifestItem::OnDataAvailable(nsIRequest *aRequest,
nsISupports *aContext,
nsIInputStream *aStream,
PRUint32 aOffset,
PRUint32 aCount)
{
PRUint32 bytesRead = 0;
aStream->ReadSegments(ReadManifest, this, aCount, &bytesRead);
mBytesRead += bytesRead;
if (mParserState == PARSE_ERROR) {
LOG(("OnDataAvailable is canceling the request due a parse error\n"));
return NS_ERROR_ABORT;
}
LOG(("loaded %u bytes into offline cache [offset=%u]\n",
bytesRead, aOffset));
// All the parent method does is read and discard, don't bother
// chaining up.
return NS_OK;
}
NS_IMETHODIMP
nsOfflineManifestItem::OnStopRequest(nsIRequest *aRequest,
nsISupports *aContext,
nsresult aStatus)
{
// handle any leftover manifest data
nsCString::const_iterator begin, end;
mReadBuf.BeginReading(begin);
mReadBuf.EndReading(end);
nsresult rv = HandleManifestLine(begin, end);
NS_ENSURE_SUCCESS(rv, rv);
if (mBytesRead == 0) {
// we didn't need to read (because LOAD_ONLY_IF_MODIFIED was
// specified.)
mNeedsUpdate = false;
} else {
rv = CheckNewManifestContentHash(aRequest);
NS_ENSURE_SUCCESS(rv, rv);
}
return nsOfflineCacheUpdateItem::OnStopRequest(aRequest, aContext, aStatus);
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdate::nsISupports
//-----------------------------------------------------------------------------
NS_IMPL_ISUPPORTS2(nsOfflineCacheUpdate,
nsIOfflineCacheUpdateObserver,
nsIOfflineCacheUpdate)
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdate <public>
//-----------------------------------------------------------------------------
nsOfflineCacheUpdate::nsOfflineCacheUpdate()
: mState(STATE_UNINITIALIZED)
, mOwner(nsnull)
, mAddedItems(false)
, mPartialUpdate(false)
, mSucceeded(true)
, mObsolete(false)
, mCurrentItem(-1)
, mRescheduleCount(0)
{
}
nsOfflineCacheUpdate::~nsOfflineCacheUpdate()
{
LOG(("nsOfflineCacheUpdate::~nsOfflineCacheUpdate [%p]", this));
}
/* static */
nsresult
nsOfflineCacheUpdate::GetCacheKey(nsIURI *aURI, nsACString &aKey)
{
aKey.Truncate();
nsCOMPtr<nsIURI> newURI;
nsresult rv = aURI->CloneIgnoringRef(getter_AddRefs(newURI));
NS_ENSURE_SUCCESS(rv, rv);
rv = newURI->GetAsciiSpec(aKey);
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::Init(nsIURI *aManifestURI,
nsIURI *aDocumentURI,
nsIDOMDocument *aDocument)
{
nsresult rv;
// Make sure the service has been initialized
nsOfflineCacheUpdateService* service =
nsOfflineCacheUpdateService::EnsureService();
if (!service)
return NS_ERROR_FAILURE;
LOG(("nsOfflineCacheUpdate::Init [%p]", this));
mPartialUpdate = false;
// Only http and https applications are supported.
bool match;
rv = aManifestURI->SchemeIs("http", &match);
NS_ENSURE_SUCCESS(rv, rv);
if (!match) {
rv = aManifestURI->SchemeIs("https", &match);
NS_ENSURE_SUCCESS(rv, rv);
if (!match)
return NS_ERROR_ABORT;
}
mManifestURI = aManifestURI;
rv = mManifestURI->GetAsciiHost(mUpdateDomain);
NS_ENSURE_SUCCESS(rv, rv);
nsCAutoString manifestSpec;
rv = GetCacheKey(mManifestURI, manifestSpec);
NS_ENSURE_SUCCESS(rv, rv);
mDocumentURI = aDocumentURI;
nsCOMPtr<nsIApplicationCacheService> cacheService =
do_GetService(NS_APPLICATIONCACHESERVICE_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = cacheService->GetActiveCache(manifestSpec,
getter_AddRefs(mPreviousApplicationCache));
NS_ENSURE_SUCCESS(rv, rv);
rv = cacheService->CreateApplicationCache(manifestSpec,
getter_AddRefs(mApplicationCache));
NS_ENSURE_SUCCESS(rv, rv);
rv = mApplicationCache->GetClientID(mClientID);
NS_ENSURE_SUCCESS(rv, rv);
mState = STATE_INITIALIZED;
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::InitPartial(nsIURI *aManifestURI,
const nsACString& clientID,
nsIURI *aDocumentURI)
{
nsresult rv;
// Make sure the service has been initialized
nsOfflineCacheUpdateService* service =
nsOfflineCacheUpdateService::EnsureService();
if (!service)
return NS_ERROR_FAILURE;
LOG(("nsOfflineCacheUpdate::InitPartial [%p]", this));
mPartialUpdate = true;
mClientID = clientID;
mDocumentURI = aDocumentURI;
mManifestURI = aManifestURI;
rv = mManifestURI->GetAsciiHost(mUpdateDomain);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIApplicationCacheService> cacheService =
do_GetService(NS_APPLICATIONCACHESERVICE_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = cacheService->GetApplicationCache(mClientID,
getter_AddRefs(mApplicationCache));
NS_ENSURE_SUCCESS(rv, rv);
if (!mApplicationCache) {
nsCAutoString manifestSpec;
rv = GetCacheKey(mManifestURI, manifestSpec);
NS_ENSURE_SUCCESS(rv, rv);
rv = cacheService->CreateApplicationCache
(manifestSpec, getter_AddRefs(mApplicationCache));
NS_ENSURE_SUCCESS(rv, rv);
}
nsCAutoString groupID;
rv = mApplicationCache->GetGroupID(groupID);
NS_ENSURE_SUCCESS(rv, rv);
rv = NS_NewURI(getter_AddRefs(mManifestURI), groupID);
NS_ENSURE_SUCCESS(rv, rv);
mState = STATE_INITIALIZED;
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::HandleManifest(bool *aDoUpdate)
{
// Be pessimistic
*aDoUpdate = false;
bool succeeded;
nsresult rv = mManifestItem->GetRequestSucceeded(&succeeded);
NS_ENSURE_SUCCESS(rv, rv);
if (!succeeded || !mManifestItem->ParseSucceeded()) {
return NS_ERROR_FAILURE;
}
if (!mManifestItem->NeedsUpdate()) {
return NS_OK;
}
// Add items requested by the manifest.
const nsCOMArray<nsIURI> &manifestURIs = mManifestItem->GetExplicitURIs();
for (PRInt32 i = 0; i < manifestURIs.Count(); i++) {
rv = AddURI(manifestURIs[i], nsIApplicationCache::ITEM_EXPLICIT);
NS_ENSURE_SUCCESS(rv, rv);
}
const nsCOMArray<nsIURI> &fallbackURIs = mManifestItem->GetFallbackURIs();
for (PRInt32 i = 0; i < fallbackURIs.Count(); i++) {
rv = AddURI(fallbackURIs[i], nsIApplicationCache::ITEM_FALLBACK);
NS_ENSURE_SUCCESS(rv, rv);
}
// The document that requested the manifest is implicitly included
// as part of that manifest update.
rv = AddURI(mDocumentURI, nsIApplicationCache::ITEM_IMPLICIT);
NS_ENSURE_SUCCESS(rv, rv);
// Add items previously cached implicitly
rv = AddExistingItems(nsIApplicationCache::ITEM_IMPLICIT);
NS_ENSURE_SUCCESS(rv, rv);
// Add items requested by the script API
rv = AddExistingItems(nsIApplicationCache::ITEM_DYNAMIC);
NS_ENSURE_SUCCESS(rv, rv);
// Add opportunistically cached items conforming current opportunistic
// namespace list
rv = AddExistingItems(nsIApplicationCache::ITEM_OPPORTUNISTIC,
&mManifestItem->GetOpportunisticNamespaces());
NS_ENSURE_SUCCESS(rv, rv);
*aDoUpdate = true;
return NS_OK;
}
void
nsOfflineCacheUpdate::LoadCompleted()
{
nsresult rv;
// Keep the object alive through a Finish() call.
nsCOMPtr<nsIOfflineCacheUpdate> kungFuDeathGrip(this);
LOG(("nsOfflineCacheUpdate::LoadCompleted [%p]", this));
if (mState == STATE_CANCELLED) {
Finish();
return;
}
if (mState == STATE_CHECKING) {
// Manifest load finished.
NS_ASSERTION(mManifestItem,
"Must have a manifest item in STATE_CHECKING.");
// A 404 or 410 is interpreted as an intentional removal of
// the manifest file, rather than a transient server error.
// Obsolete this cache group if one of these is returned.
PRUint16 status;
rv = mManifestItem->GetStatus(&status);
if (status == 404 || status == 410) {
mSucceeded = false;
mObsolete = true;
if (mPreviousApplicationCache) {
NotifyState(nsIOfflineCacheUpdateObserver::STATE_OBSOLETE);
} else {
NotifyState(nsIOfflineCacheUpdateObserver::STATE_ERROR);
}
Finish();
return;
}
bool doUpdate;
if (NS_FAILED(HandleManifest(&doUpdate))) {
mSucceeded = false;
NotifyState(nsIOfflineCacheUpdateObserver::STATE_ERROR);
Finish();
return;
}
if (!doUpdate) {
mSucceeded = false;
AssociateDocuments(mPreviousApplicationCache);
ScheduleImplicit();
// If we didn't need an implicit update, we can
// send noupdate and end the update now.
if (!mImplicitUpdate) {
NotifyState(nsIOfflineCacheUpdateObserver::STATE_NOUPDATE);
Finish();
}
return;
}
rv = mApplicationCache->MarkEntry(mManifestItem->mCacheKey,
mManifestItem->mItemType);
if (NS_FAILED(rv)) {
mSucceeded = false;
NotifyState(nsIOfflineCacheUpdateObserver::STATE_ERROR);
Finish();
return;
}
mState = STATE_DOWNLOADING;
NotifyState(nsIOfflineCacheUpdateObserver::STATE_DOWNLOADING);
// Start fetching resources.
ProcessNextURI();
return;
}
// Normal load finished.
nsRefPtr<nsOfflineCacheUpdateItem> item = mItems[mCurrentItem];
mCurrentItem++;
bool succeeded;
rv = item->GetRequestSucceeded(&succeeded);
// Check for failures. 3XX, 4XX and 5XX errors on items explicitly
// listed in the manifest will cause the update to fail.
if (NS_FAILED(rv) || !succeeded) {
if (item->mItemType &
(nsIApplicationCache::ITEM_EXPLICIT |
nsIApplicationCache::ITEM_FALLBACK)) {
mSucceeded = false;
}
} else {
rv = mApplicationCache->MarkEntry(item->mCacheKey, item->mItemType);
if (NS_FAILED(rv)) {
mSucceeded = false;
}
}
if (!mSucceeded) {
NotifyState(nsIOfflineCacheUpdateObserver::STATE_ERROR);
Finish();
return;
}
rv = NotifyState(nsIOfflineCacheUpdateObserver::STATE_ITEMCOMPLETED);
if (NS_FAILED(rv)) return;
ProcessNextURI();
}
void
nsOfflineCacheUpdate::ManifestCheckCompleted(nsresult aStatus,
const nsCString &aManifestHash)
{
// Keep the object alive through a Finish() call.
nsCOMPtr<nsIOfflineCacheUpdate> kungFuDeathGrip(this);
if (NS_SUCCEEDED(aStatus)) {
nsCAutoString firstManifestHash;
mManifestItem->GetManifestHash(firstManifestHash);
if (aManifestHash != firstManifestHash) {
LOG(("Manifest has changed during cache items download [%p]", this));
aStatus = NS_ERROR_FAILURE;
}
}
if (NS_FAILED(aStatus)) {
mSucceeded = false;
NotifyState(nsIOfflineCacheUpdateObserver::STATE_ERROR);
}
if (NS_FAILED(aStatus) && mRescheduleCount < kRescheduleLimit) {
// Do the final stuff but prevent notification of STATE_FINISHED.
// That would disconnect listeners that are responsible for document
// association after a successful update. Forwarding notifications
// from a new update through this dead update to them is absolutely
// correct.
FinishNoNotify();
nsRefPtr<nsOfflineCacheUpdate> newUpdate =
new nsOfflineCacheUpdate();
// Leave aDocument argument null. Only glues and children keep
// document instances.
newUpdate->Init(mManifestURI, mDocumentURI, nsnull);
// In a rare case the manifest will not be modified on the next refetch
// transfer all master document URIs to the new update to ensure that
// all documents refering it will be properly cached.
for (PRInt32 i = 0; i < mDocumentURIs.Count(); i++) {
newUpdate->StickDocument(mDocumentURIs[i]);
}
newUpdate->mRescheduleCount = mRescheduleCount + 1;
newUpdate->AddObserver(this, false);
newUpdate->Schedule();
}
else {
Finish();
}
}
nsresult
nsOfflineCacheUpdate::Begin()
{
LOG(("nsOfflineCacheUpdate::Begin [%p]", this));
// Keep the object alive through a ProcessNextURI()/Finish() call.
nsCOMPtr<nsIOfflineCacheUpdate> kungFuDeathGrip(this);
mCurrentItem = 0;
if (mPartialUpdate) {
mState = STATE_DOWNLOADING;
NotifyState(nsIOfflineCacheUpdateObserver::STATE_DOWNLOADING);
ProcessNextURI();
return NS_OK;
}
// Start checking the manifest.
nsCOMPtr<nsIURI> uri;
mManifestItem = new nsOfflineManifestItem(this, mManifestURI,
mDocumentURI,
mPreviousApplicationCache,
mClientID);
if (!mManifestItem) {
return NS_ERROR_OUT_OF_MEMORY;
}
mState = STATE_CHECKING;
NotifyState(nsIOfflineCacheUpdateObserver::STATE_CHECKING);
nsresult rv = mManifestItem->OpenChannel();
if (NS_FAILED(rv)) {
LoadCompleted();
}
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::Cancel()
{
LOG(("nsOfflineCacheUpdate::Cancel [%p]", this));
mState = STATE_CANCELLED;
mSucceeded = false;
if (mCurrentItem >= 0 &&
mCurrentItem < static_cast<PRInt32>(mItems.Length())) {
// Load might be running
mItems[mCurrentItem]->Cancel();
}
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdate <private>
//-----------------------------------------------------------------------------
nsresult
nsOfflineCacheUpdate::AddExistingItems(PRUint32 aType,
nsTArray<nsCString>* namespaceFilter)
{
if (!mPreviousApplicationCache) {
return NS_OK;
}
if (namespaceFilter && namespaceFilter->Length() == 0) {
// Don't bother to walk entries when there are no namespaces
// defined.
return NS_OK;
}
PRUint32 count = 0;
char **keys = nsnull;
nsresult rv = mPreviousApplicationCache->GatherEntries(aType,
&count, &keys);
NS_ENSURE_SUCCESS(rv, rv);
AutoFreeArray autoFree(count, keys);
for (PRUint32 i = 0; i < count; i++) {
if (namespaceFilter) {
bool found = false;
for (PRUint32 j = 0; j < namespaceFilter->Length() && !found; j++) {
found = StringBeginsWith(nsDependentCString(keys[i]),
namespaceFilter->ElementAt(j));
}
if (!found)
continue;
}
nsCOMPtr<nsIURI> uri;
if (NS_SUCCEEDED(NS_NewURI(getter_AddRefs(uri), keys[i]))) {
rv = AddURI(uri, aType);
NS_ENSURE_SUCCESS(rv, rv);
}
}
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::ProcessNextURI()
{
// Keep the object alive through a Finish() call.
nsCOMPtr<nsIOfflineCacheUpdate> kungFuDeathGrip(this);
LOG(("nsOfflineCacheUpdate::ProcessNextURI [%p, current=%d, numItems=%d]",
this, mCurrentItem, mItems.Length()));
NS_ASSERTION(mState == STATE_DOWNLOADING,
"ProcessNextURI should only be called from the DOWNLOADING state");
if (mCurrentItem >= static_cast<PRInt32>(mItems.Length())) {
if (mPartialUpdate) {
return Finish();
} else {
// Verify that the manifest wasn't changed during the
// update, to prevent capturing a cache while the server
// is being updated. The check will call
// ManifestCheckCompleted() when it's done.
nsRefPtr<nsManifestCheck> manifestCheck =
new nsManifestCheck(this, mManifestURI, mDocumentURI);
if (NS_FAILED(manifestCheck->Begin())) {
mSucceeded = false;
NotifyState(nsIOfflineCacheUpdateObserver::STATE_ERROR);
return Finish();
}
return NS_OK;
}
}
#if defined(PR_LOGGING)
if (LOG_ENABLED()) {
nsCAutoString spec;
mItems[mCurrentItem]->mURI->GetSpec(spec);
LOG(("%p: Opening channel for %s", this, spec.get()));
}
#endif
NotifyState(nsIOfflineCacheUpdateObserver::STATE_ITEMSTARTED);
nsresult rv = mItems[mCurrentItem]->OpenChannel();
if (NS_FAILED(rv)) {
LoadCompleted();
return rv;
}
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::GatherObservers(nsCOMArray<nsIOfflineCacheUpdateObserver> &aObservers)
{
for (PRInt32 i = 0; i < mWeakObservers.Count(); i++) {
nsCOMPtr<nsIOfflineCacheUpdateObserver> observer =
do_QueryReferent(mWeakObservers[i]);
if (observer)
aObservers.AppendObject(observer);
else
mWeakObservers.RemoveObjectAt(i--);
}
for (PRInt32 i = 0; i < mObservers.Count(); i++) {
aObservers.AppendObject(mObservers[i]);
}
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::NotifyState(PRUint32 state)
{
LOG(("nsOfflineCacheUpdate::NotifyState [%p, %d]", this, state));
nsCOMArray<nsIOfflineCacheUpdateObserver> observers;
nsresult rv = GatherObservers(observers);
NS_ENSURE_SUCCESS(rv, rv);
for (PRInt32 i = 0; i < observers.Count(); i++) {
observers[i]->UpdateStateChanged(this, state);
}
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::AssociateDocuments(nsIApplicationCache* cache)
{
nsCOMArray<nsIOfflineCacheUpdateObserver> observers;
nsresult rv = GatherObservers(observers);
NS_ENSURE_SUCCESS(rv, rv);
for (PRInt32 i = 0; i < observers.Count(); i++) {
observers[i]->ApplicationCacheAvailable(cache);
}
return NS_OK;
}
void
nsOfflineCacheUpdate::StickDocument(nsIURI *aDocumentURI)
{
if (!aDocumentURI)
return;
mDocumentURIs.AppendObject(aDocumentURI);
}
void
nsOfflineCacheUpdate::SetOwner(nsOfflineCacheUpdateOwner *aOwner)
{
NS_ASSERTION(!mOwner, "Tried to set cache update owner twice.");
mOwner = aOwner;
}
nsresult
nsOfflineCacheUpdate::UpdateFinished(nsOfflineCacheUpdate *aUpdate)
{
// Keep the object alive through a Finish() call.
nsCOMPtr<nsIOfflineCacheUpdate> kungFuDeathGrip(this);
mImplicitUpdate = nsnull;
NotifyState(nsIOfflineCacheUpdateObserver::STATE_NOUPDATE);
Finish();
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::ScheduleImplicit()
{
if (mDocumentURIs.Count() == 0)
return NS_OK;
nsresult rv;
nsRefPtr<nsOfflineCacheUpdate> update = new nsOfflineCacheUpdate();
NS_ENSURE_TRUE(update, NS_ERROR_OUT_OF_MEMORY);
nsCAutoString clientID;
if (mPreviousApplicationCache) {
rv = mPreviousApplicationCache->GetClientID(clientID);
NS_ENSURE_SUCCESS(rv, rv);
}
else {
clientID = mClientID;
}
rv = update->InitPartial(mManifestURI, clientID, mDocumentURI);
NS_ENSURE_SUCCESS(rv, rv);
for (PRInt32 i = 0; i < mDocumentURIs.Count(); i++) {
rv = update->AddURI(mDocumentURIs[i],
nsIApplicationCache::ITEM_IMPLICIT);
NS_ENSURE_SUCCESS(rv, rv);
}
update->SetOwner(this);
rv = update->Begin();
NS_ENSURE_SUCCESS(rv, rv);
mImplicitUpdate = update;
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::FinishNoNotify()
{
LOG(("nsOfflineCacheUpdate::Finish [%p]", this));
mState = STATE_FINISHED;
if (!mPartialUpdate) {
if (mSucceeded) {
nsIArray *namespaces = mManifestItem->GetNamespaces();
nsresult rv = mApplicationCache->AddNamespaces(namespaces);
if (NS_FAILED(rv)) {
NotifyState(nsIOfflineCacheUpdateObserver::STATE_ERROR);
mSucceeded = false;
}
rv = mApplicationCache->Activate();
if (NS_FAILED(rv)) {
NotifyState(nsIOfflineCacheUpdateObserver::STATE_ERROR);
mSucceeded = false;
}
AssociateDocuments(mApplicationCache);
}
if (mObsolete) {
nsCOMPtr<nsIApplicationCacheService> appCacheService =
do_GetService(NS_APPLICATIONCACHESERVICE_CONTRACTID);
if (appCacheService) {
nsCAutoString groupID;
mApplicationCache->GetGroupID(groupID);
appCacheService->DeactivateGroup(groupID);
}
}
if (!mSucceeded) {
// Update was not merged, mark all the loads as failures
for (PRUint32 i = 0; i < mItems.Length(); i++) {
mItems[i]->Cancel();
}
mApplicationCache->Discard();
}
}
nsresult rv = NS_OK;
if (mOwner) {
rv = mOwner->UpdateFinished(this);
mOwner = nsnull;
}
return rv;
}
nsresult
nsOfflineCacheUpdate::Finish()
{
nsresult rv = FinishNoNotify();
NotifyState(nsIOfflineCacheUpdateObserver::STATE_FINISHED);
return rv;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdate::nsIOfflineCacheUpdate
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsOfflineCacheUpdate::GetUpdateDomain(nsACString &aUpdateDomain)
{
NS_ENSURE_TRUE(mState >= STATE_INITIALIZED, NS_ERROR_NOT_INITIALIZED);
aUpdateDomain = mUpdateDomain;
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdate::GetStatus(PRUint16 *aStatus)
{
switch (mState) {
case STATE_CHECKING :
*aStatus = nsIDOMOfflineResourceList::CHECKING;
return NS_OK;
case STATE_DOWNLOADING :
*aStatus = nsIDOMOfflineResourceList::DOWNLOADING;
return NS_OK;
default :
*aStatus = nsIDOMOfflineResourceList::IDLE;
return NS_OK;
}
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsOfflineCacheUpdate::GetPartial(bool *aPartial)
{
*aPartial = mPartialUpdate;
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdate::GetManifestURI(nsIURI **aManifestURI)
{
NS_ENSURE_TRUE(mState >= STATE_INITIALIZED, NS_ERROR_NOT_INITIALIZED);
NS_IF_ADDREF(*aManifestURI = mManifestURI);
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdate::GetSucceeded(bool *aSucceeded)
{
NS_ENSURE_TRUE(mState == STATE_FINISHED, NS_ERROR_NOT_AVAILABLE);
*aSucceeded = mSucceeded;
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdate::GetIsUpgrade(bool *aIsUpgrade)
{
NS_ENSURE_TRUE(mState >= STATE_INITIALIZED, NS_ERROR_NOT_INITIALIZED);
*aIsUpgrade = (mPreviousApplicationCache != nsnull);
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::AddURI(nsIURI *aURI, PRUint32 aType)
{
NS_ENSURE_TRUE(mState >= STATE_INITIALIZED, NS_ERROR_NOT_INITIALIZED);
if (mState >= STATE_DOWNLOADING)
return NS_ERROR_NOT_AVAILABLE;
// Resource URIs must have the same scheme as the manifest.
nsCAutoString scheme;
aURI->GetScheme(scheme);
bool match;
if (NS_FAILED(mManifestURI->SchemeIs(scheme.get(), &match)) || !match)
return NS_ERROR_FAILURE;
// Don't fetch the same URI twice.
for (PRUint32 i = 0; i < mItems.Length(); i++) {
bool equals;
if (NS_SUCCEEDED(mItems[i]->mURI->Equals(aURI, &equals)) && equals) {
// retain both types.
mItems[i]->mItemType |= aType;
return NS_OK;
}
}
nsRefPtr<nsOfflineCacheUpdateItem> item =
new nsOfflineCacheUpdateItem(this, aURI, mDocumentURI,
mPreviousApplicationCache, mClientID,
aType);
if (!item) return NS_ERROR_OUT_OF_MEMORY;
mItems.AppendElement(item);
mAddedItems = true;
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdate::AddDynamicURI(nsIURI *aURI)
{
if (GeckoProcessType_Default != XRE_GetProcessType())
return NS_ERROR_NOT_IMPLEMENTED;
// If this is a partial update and the resource is already in the
// cache, we should only mark the entry, not fetch it again.
if (mPartialUpdate) {
nsCAutoString key;
GetCacheKey(aURI, key);
PRUint32 types;
nsresult rv = mApplicationCache->GetTypes(key, &types);
if (NS_SUCCEEDED(rv)) {
if (!(types & nsIApplicationCache::ITEM_DYNAMIC)) {
mApplicationCache->MarkEntry
(key, nsIApplicationCache::ITEM_DYNAMIC);
}
return NS_OK;
}
}
return AddURI(aURI, nsIApplicationCache::ITEM_DYNAMIC);
}
NS_IMETHODIMP
nsOfflineCacheUpdate::AddObserver(nsIOfflineCacheUpdateObserver *aObserver,
bool aHoldWeak)
{
LOG(("nsOfflineCacheUpdate::AddObserver [%p] to update [%p]", aObserver, this));
NS_ENSURE_TRUE(mState >= STATE_INITIALIZED, NS_ERROR_NOT_INITIALIZED);
if (aHoldWeak) {
nsCOMPtr<nsIWeakReference> weakRef = do_GetWeakReference(aObserver);
mWeakObservers.AppendObject(weakRef);
} else {
mObservers.AppendObject(aObserver);
}
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdate::RemoveObserver(nsIOfflineCacheUpdateObserver *aObserver)
{
LOG(("nsOfflineCacheUpdate::RemoveObserver [%p] from update [%p]", aObserver, this));
NS_ENSURE_TRUE(mState >= STATE_INITIALIZED, NS_ERROR_NOT_INITIALIZED);
for (PRInt32 i = 0; i < mWeakObservers.Count(); i++) {
nsCOMPtr<nsIOfflineCacheUpdateObserver> observer =
do_QueryReferent(mWeakObservers[i]);
if (observer == aObserver) {
mWeakObservers.RemoveObjectAt(i);
return NS_OK;
}
}
for (PRInt32 i = 0; i < mObservers.Count(); i++) {
if (mObservers[i] == aObserver) {
mObservers.RemoveObjectAt(i);
return NS_OK;
}
}
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdate::Schedule()
{
LOG(("nsOfflineCacheUpdate::Schedule [%p]", this));
nsOfflineCacheUpdateService* service =
nsOfflineCacheUpdateService::EnsureService();
if (!service) {
return NS_ERROR_FAILURE;
}
return service->ScheduleUpdate(this);
}
NS_IMETHODIMP
nsOfflineCacheUpdate::UpdateStateChanged(nsIOfflineCacheUpdate *aUpdate,
PRUint32 aState)
{
if (aState == nsIOfflineCacheUpdateObserver::STATE_FINISHED) {
// Take the mSucceeded flag from the underlying update, we will be
// queried for it soon. mSucceeded of this update is false (manifest
// check failed) but the subsequent re-fetch update might succeed
bool succeeded;
aUpdate->GetSucceeded(&succeeded);
mSucceeded = succeeded;
}
nsresult rv = NotifyState(aState);
if (aState == nsIOfflineCacheUpdateObserver::STATE_FINISHED)
aUpdate->RemoveObserver(this);
return rv;
}
NS_IMETHODIMP
nsOfflineCacheUpdate::ApplicationCacheAvailable(nsIApplicationCache *applicationCache)
{
return AssociateDocuments(applicationCache);
}
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