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gecko/uriloader/prefetch/nsOfflineCacheUpdate.cpp

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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 "nsICache.h"
#include "nsICacheService.h"
#include "nsICacheSession.h"
#include "nsICachingChannel.h"
#include "nsIDOMWindow.h"
#include "nsIDOMOfflineResourceList.h"
#include "nsIObserverService.h"
#include "nsIOfflineCacheSession.h"
#include "nsIWebProgress.h"
#include "nsICryptoHash.h"
#include "nsICacheEntryDescriptor.h"
#include "nsNetCID.h"
#include "nsNetUtil.h"
#include "nsServiceManagerUtils.h"
#include "nsStreamUtils.h"
#include "nsThreadUtils.h"
#include "prlog.h"
static nsOfflineCacheUpdateService *gOfflineCacheUpdateService = nsnull;
#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
//
static 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;
};
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateItem::nsISupports
//-----------------------------------------------------------------------------
NS_IMPL_ISUPPORTS6(nsOfflineCacheUpdateItem,
nsIDOMLoadStatus,
nsIRequestObserver,
nsIStreamListener,
nsIRunnable,
nsIInterfaceRequestor,
nsIChannelEventSink)
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateItem <public>
//-----------------------------------------------------------------------------
nsOfflineCacheUpdateItem::nsOfflineCacheUpdateItem(nsOfflineCacheUpdate *aUpdate,
nsIURI *aURI,
nsIURI *aReferrerURI,
const nsACString &aClientID)
: mURI(aURI)
, mReferrerURI(aReferrerURI)
, mClientID(aClientID)
, mUpdate(aUpdate)
, mChannel(nsnull)
, mState(nsIDOMLoadStatus::UNINITIALIZED)
, mBytesRead(0)
{
}
nsOfflineCacheUpdateItem::~nsOfflineCacheUpdateItem()
{
}
nsresult
nsOfflineCacheUpdateItem::OpenChannel()
{
nsresult 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);
// 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"),
PR_FALSE);
}
nsCOMPtr<nsICachingChannel> cachingChannel =
do_QueryInterface(mChannel);
if (cachingChannel) {
rv = cachingChannel->SetCacheForOfflineUse(PR_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::OnChannelRedirect(nsIChannel *aOldChannel,
nsIChannel *aNewChannel,
PRUint32 aFlags)
{
nsCOMPtr<nsIURI> newURI;
nsresult rv = aNewChannel->GetURI(getter_AddRefs(newURI));
if (NS_FAILED(rv))
return rv;
nsCOMPtr<nsICachingChannel> oldCachingChannel =
do_QueryInterface(aOldChannel);
nsCOMPtr<nsICachingChannel> newCachingChannel =
do_QueryInterface(aOldChannel);
if (newCachingChannel) {
rv = newCachingChannel->SetCacheForOfflineUse(PR_TRUE);
NS_ENSURE_SUCCESS(rv, rv);
if (!mClientID.IsEmpty()) {
rv = newCachingChannel->SetOfflineCacheClientID(mClientID);
NS_ENSURE_SUCCESS(rv, rv);
}
}
nsCAutoString oldScheme;
mURI->GetScheme(oldScheme);
PRBool 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"),
PR_FALSE);
mChannel = aNewChannel;
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;
}
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) {
// Someone's calling this before we got a response... Check our
// ReadyState. If we're at RECEIVING or LOADED, then this means the
// connection errored before we got any data; return a somewhat
// sensible error code in that case.
if (mState >= nsIDOMLoadStatus::RECEIVING) {
*aStatus = NS_ERROR_NOT_AVAILABLE;
return NS_OK;
}
*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,
const nsACString &aClientID)
: nsOfflineCacheUpdateItem(aUpdate, aURI, aReferrerURI, aClientID)
, mParserState(PARSE_INIT)
, mNeedsUpdate(PR_TRUE)
, mManifestHashInitialized(PR_FALSE)
{
}
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 = PR_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::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_NETWORK_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;
nsCAutoString scheme;
uri->GetScheme(scheme);
// Manifest URIs must have the same scheme as the manifest.
PRBool match;
if (NS_FAILED(mURI->SchemeIs(scheme.get(), &match)) || !match)
break;
mExplicitURIs.AppendObject(uri);
break;
}
case PARSE_FALLBACK_ENTRIES:
case PARSE_NETWORK_ENTRIES: {
// we don't currently implement fallbacks or whitelists,
// ignore these for now.
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(PR_TRUE, newManifestHashValue);
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 == newManifestHashValue) {
LOG(("Update not needed, downloaded manifest content is byte-for-byte identical"));
mNeedsUpdate = PR_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", PromiseFlatCString(newManifestHashValue).get());
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
NS_IMETHODIMP
nsOfflineManifestItem::OnStartRequest(nsIRequest *aRequest,
nsISupports *aContext)
{
nsresult rv;
nsCOMPtr<nsIHttpChannel> channel = do_QueryInterface(aRequest, &rv);
NS_ENSURE_SUCCESS(rv, rv);
PRBool 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 = PR_FALSE;
} else {
rv = CheckNewManifestContentHash(aRequest);
NS_ENSURE_SUCCESS(rv, rv);
}
return nsOfflineCacheUpdateItem::OnStopRequest(aRequest, aContext, aStatus);
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdate::nsISupports
//-----------------------------------------------------------------------------
NS_IMPL_ISUPPORTS1(nsOfflineCacheUpdate,
nsIOfflineCacheUpdate)
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdate <public>
//-----------------------------------------------------------------------------
nsOfflineCacheUpdate::nsOfflineCacheUpdate()
: mState(STATE_UNINITIALIZED)
, mAddedItems(PR_FALSE)
, mPartialUpdate(PR_FALSE)
, mSucceeded(PR_TRUE)
, mCurrentItem(-1)
{
}
nsOfflineCacheUpdate::~nsOfflineCacheUpdate()
{
LOG(("nsOfflineCacheUpdate::~nsOfflineCacheUpdate [%p]", this));
}
nsresult
nsOfflineCacheUpdate::Init(PRBool aPartialUpdate,
nsIURI *aManifestURI,
nsIURI *aDocumentURI)
{
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 = aPartialUpdate;
// Only http and https applications are supported.
PRBool 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 = mManifestURI->GetAsciiSpec(manifestSpec);
NS_ENSURE_SUCCESS(rv, rv);
PRInt32 ref = manifestSpec.FindChar('#');
if (ref != kNotFound)
manifestSpec.Truncate(ref);
mManifestOwnerSpec = manifestSpec;
mManifestOwnerSpec.AppendLiteral("#manifest");
mDynamicOwnerSpec = manifestSpec;
mDynamicOwnerSpec.AppendLiteral("#dynamic");
mDocumentURI = aDocumentURI;
nsCOMPtr<nsICacheService> cacheService =
do_GetService(NS_CACHESERVICE_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsICacheSession> session;
rv = cacheService->CreateSession("HTTP-offline",
nsICache::STORE_OFFLINE,
nsICache::STREAM_BASED,
getter_AddRefs(session));
NS_ENSURE_SUCCESS(rv, rv);
mMainCacheSession = do_QueryInterface(session, &rv);
NS_ENSURE_SUCCESS(rv, rv);
// Partial updates don't use temporary cache sessions
if (aPartialUpdate) {
mCacheSession = mMainCacheSession;
} else {
rv = cacheService->CreateTemporaryClientID(nsICache::STORE_OFFLINE,
mClientID);
NS_ENSURE_SUCCESS(rv, rv);
rv = cacheService->CreateSession(mClientID.get(),
nsICache::STORE_OFFLINE,
nsICache::STREAM_BASED,
getter_AddRefs(session));
NS_ENSURE_SUCCESS(rv, rv);
mCacheSession = do_QueryInterface(session, &rv);
NS_ENSURE_SUCCESS(rv, rv);
// The manifest implicitly owns itself.
rv = mCacheSession->AddOwnedKey(mUpdateDomain, mManifestOwnerSpec,
manifestSpec);
NS_ENSURE_SUCCESS(rv, rv);
}
mState = STATE_INITIALIZED;
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::HandleManifest(PRBool *aDoUpdate)
{
// Be pessimistic
*aDoUpdate = PR_FALSE;
PRUint16 status;
nsresult rv = mManifestItem->GetStatus(&status);
NS_ENSURE_SUCCESS(rv, rv);
if (status == 0 || status >= 400 || !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], mManifestOwnerSpec);
NS_ENSURE_SUCCESS(rv, rv);
}
// The document that requested the manifest is implicitly included
// as part of that manifest update.
rv = AddURI(mDocumentURI, mManifestOwnerSpec);
NS_ENSURE_SUCCESS(rv, rv);
// Add items requested by the script API
rv = AddOwnedItems(mDynamicOwnerSpec);
NS_ENSURE_SUCCESS(rv, rv);
*aDoUpdate = PR_TRUE;
return NS_OK;
}
void
nsOfflineCacheUpdate::LoadCompleted()
{
nsresult rv;
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.");
PRBool doUpdate;
if (NS_FAILED(HandleManifest(&doUpdate))) {
mSucceeded = PR_FALSE;
NotifyError();
Finish();
return;
}
if (!doUpdate) {
mSucceeded = PR_FALSE;
NotifyNoUpdate();
Finish();
return;
}
mState = STATE_DOWNLOADING;
NotifyDownloading();
// Start fetching resources.
ProcessNextURI();
return;
}
// Normal load finished.
nsRefPtr<nsOfflineCacheUpdateItem> item = mItems[mCurrentItem];
mCurrentItem++;
PRUint16 status;
rv = item->GetStatus(&status);
// Check for failures. 4XX and 5XX errors will cause the update to fail.
if (NS_FAILED(rv) || status == 0 || status >= 400) {
mSucceeded = PR_FALSE;
NotifyError();
Finish();
return;
}
rv = NotifyCompleted(item);
if (NS_FAILED(rv)) return;
ProcessNextURI();
}
nsresult
nsOfflineCacheUpdate::Begin()
{
LOG(("nsOfflineCacheUpdate::Begin [%p]", this));
mCurrentItem = 0;
if (mPartialUpdate) {
mState = STATE_DOWNLOADING;
NotifyDownloading();
ProcessNextURI();
return NS_OK;
}
// Start checking the manifest.
nsCOMPtr<nsIURI> uri;
mManifestItem = new nsOfflineManifestItem(this, mManifestURI,
mDocumentURI, mClientID);
if (!mManifestItem) {
return NS_ERROR_OUT_OF_MEMORY;
}
mState = STATE_CHECKING;
NotifyChecking();
nsresult rv = mManifestItem->OpenChannel();
if (NS_FAILED(rv)) {
LoadCompleted();
}
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::Cancel()
{
LOG(("nsOfflineCacheUpdate::Cancel [%p]", this));
mState = STATE_CANCELLED;
mSucceeded = PR_FALSE;
if (mCurrentItem >= 0 &&
mCurrentItem < static_cast<PRInt32>(mItems.Length())) {
// Load might be running
mItems[mCurrentItem]->Cancel();
}
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdate <private>
//-----------------------------------------------------------------------------
nsresult
nsOfflineCacheUpdate::AddOwnedItems(const nsACString &aOwnerURI)
{
PRUint32 count;
char **keys;
nsresult rv = mMainCacheSession->GetOwnedKeys(mUpdateDomain, aOwnerURI,
&count, &keys);
NS_ENSURE_SUCCESS(rv, rv);
AutoFreeArray autoFree(count, keys);
for (PRUint32 i = 0; i < count; i++) {
nsCOMPtr<nsIURI> uri;
if (NS_SUCCEEDED(NS_NewURI(getter_AddRefs(uri), keys[i]))) {
nsRefPtr<nsOfflineCacheUpdateItem> item =
new nsOfflineCacheUpdateItem(this, uri, mDocumentURI,
mClientID);
if (!item) return NS_ERROR_OUT_OF_MEMORY;
mItems.AppendElement(item);
}
}
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::ProcessNextURI()
{
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())) {
return Finish();
}
#if defined(PR_LOGGING)
if (LOG_ENABLED()) {
nsCAutoString spec;
mItems[mCurrentItem]->mURI->GetSpec(spec);
LOG(("%p: Opening channel for %s", this, spec.get()));
}
#endif
NotifyStarted(mItems[mCurrentItem]);
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::NotifyError()
{
LOG(("nsOfflineCacheUpdate::NotifyError [%p]", this));
nsCOMArray<nsIOfflineCacheUpdateObserver> observers;
nsresult rv = GatherObservers(observers);
NS_ENSURE_SUCCESS(rv, rv);
for (PRInt32 i = 0; i < observers.Count(); i++) {
observers[i]->Error(this);
}
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::NotifyChecking()
{
LOG(("nsOfflineCacheUpdate::NotifyChecking [%p]", this));
nsCOMArray<nsIOfflineCacheUpdateObserver> observers;
nsresult rv = GatherObservers(observers);
NS_ENSURE_SUCCESS(rv, rv);
for (PRInt32 i = 0; i < observers.Count(); i++) {
observers[i]->Checking(this);
}
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::NotifyNoUpdate()
{
LOG(("nsOfflineCacheUpdate::NotifyNoUpdate [%p]", this));
nsCOMArray<nsIOfflineCacheUpdateObserver> observers;
nsresult rv = GatherObservers(observers);
NS_ENSURE_SUCCESS(rv, rv);
for (PRInt32 i = 0; i < observers.Count(); i++) {
observers[i]->NoUpdate(this);
}
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::NotifyDownloading()
{
LOG(("nsOfflineCacheUpdate::NotifyDownloading [%p]", this));
nsCOMArray<nsIOfflineCacheUpdateObserver> observers;
nsresult rv = GatherObservers(observers);
NS_ENSURE_SUCCESS(rv, rv);
for (PRInt32 i = 0; i < observers.Count(); i++) {
observers[i]->Downloading(this);
}
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::NotifyStarted(nsOfflineCacheUpdateItem *aItem)
{
LOG(("nsOfflineCacheUpdate::NotifyStarted [%p, %p]", this, aItem));
nsCOMArray<nsIOfflineCacheUpdateObserver> observers;
nsresult rv = GatherObservers(observers);
NS_ENSURE_SUCCESS(rv, rv);
for (PRInt32 i = 0; i < observers.Count(); i++) {
observers[i]->ItemStarted(this, aItem);
}
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::NotifyCompleted(nsOfflineCacheUpdateItem *aItem)
{
LOG(("nsOfflineCacheUpdate::NotifyCompleted [%p, %p]", this, aItem));
nsCOMArray<nsIOfflineCacheUpdateObserver> observers;
nsresult rv = GatherObservers(observers);
NS_ENSURE_SUCCESS(rv, rv);
for (PRInt32 i = 0; i < observers.Count(); i++) {
observers[i]->ItemCompleted(this, aItem);
}
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::Finish()
{
LOG(("nsOfflineCacheUpdate::Finish [%p]", this));
mState = STATE_FINISHED;
nsOfflineCacheUpdateService* service =
nsOfflineCacheUpdateService::EnsureService();
if (!service)
return NS_ERROR_FAILURE;
if (!mPartialUpdate) {
if (mSucceeded) {
nsresult rv = mMainCacheSession->MergeTemporaryClientID(mClientID);
if (NS_FAILED(rv)) {
NotifyError();
mSucceeded = PR_FALSE;
}
}
if (!mSucceeded) {
// Update was not merged, mark all the loads as failures
for (PRUint32 i = 0; i < mItems.Length(); i++) {
mItems[i]->Cancel();
}
}
}
return service->UpdateFinished(this);
}
//-----------------------------------------------------------------------------
// 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 :
return nsIDOMOfflineResourceList::CHECKING;
case STATE_DOWNLOADING :
return nsIDOMOfflineResourceList::DOWNLOADING;
default :
return nsIDOMOfflineResourceList::IDLE;
}
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsOfflineCacheUpdate::GetPartial(PRBool *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(PRBool *aSucceeded)
{
NS_ENSURE_TRUE(mState == STATE_FINISHED, NS_ERROR_NOT_AVAILABLE);
*aSucceeded = mSucceeded;
return NS_OK;
}
nsresult
nsOfflineCacheUpdate::AddURI(nsIURI *aURI, const nsACString &aOwnerSpec)
{
NS_ENSURE_TRUE(mState >= STATE_INITIALIZED, NS_ERROR_NOT_INITIALIZED);
if (mState >= STATE_DOWNLOADING)
return NS_ERROR_NOT_AVAILABLE;
// Manifest URIs must have the same scheme as the manifest.
nsCAutoString scheme;
aURI->GetScheme(scheme);
PRBool match;
if (NS_FAILED(mManifestURI->SchemeIs(scheme.get(), &match)) || !match)
return NS_ERROR_FAILURE;
// Save the cache key as an owned URI
nsCAutoString spec;
nsresult rv = aURI->GetSpec(spec);
NS_ENSURE_SUCCESS(rv, rv);
// url fragments aren't used in cache keys
nsCAutoString::const_iterator specStart, specEnd;
spec.BeginReading(specStart);
spec.EndReading(specEnd);
if (FindCharInReadable('#', specStart, specEnd)) {
spec.BeginReading(specEnd);
rv = mCacheSession->AddOwnedKey(mUpdateDomain, aOwnerSpec,
Substring(specEnd, specStart));
NS_ENSURE_SUCCESS(rv, rv);
} else {
rv = mCacheSession->AddOwnedKey(mUpdateDomain, aOwnerSpec, spec);
NS_ENSURE_SUCCESS(rv, rv);
}
// Don't fetch the same URI twice.
for (PRUint32 i = 0; i < mItems.Length(); i++) {
PRBool equals;
if (NS_SUCCEEDED(mItems[i]->mURI->Equals(aURI, &equals)) && equals) {
return NS_OK;
}
}
nsRefPtr<nsOfflineCacheUpdateItem> item =
new nsOfflineCacheUpdateItem(this, aURI, mDocumentURI, mClientID);
if (!item) return NS_ERROR_OUT_OF_MEMORY;
mItems.AppendElement(item);
mAddedItems = PR_TRUE;
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdate::AddDynamicURI(nsIURI *aURI)
{
return AddURI(aURI, mDynamicOwnerSpec);
}
NS_IMETHODIMP
nsOfflineCacheUpdate::GetCount(PRUint32 *aNumItems)
{
LOG(("nsOfflineCacheUpdate::GetNumItems [%p, num=%d]",
this, mItems.Length()));
NS_ENSURE_TRUE(mState >= STATE_INITIALIZED, NS_ERROR_NOT_INITIALIZED);
*aNumItems = mItems.Length();
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdate::Item(PRUint32 aIndex, nsIDOMLoadStatus **aItem)
{
LOG(("nsOfflineCacheUpdate::GetItems [%p, index=%d]", this, aIndex));
NS_ENSURE_TRUE(mState >= STATE_INITIALIZED, NS_ERROR_NOT_INITIALIZED);
if (aIndex < mItems.Length())
NS_IF_ADDREF(*aItem = mItems.ElementAt(aIndex));
else
*aItem = nsnull;
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdate::AddObserver(nsIOfflineCacheUpdateObserver *aObserver,
PRBool aHoldWeak)
{
LOG(("nsOfflineCacheUpdate::AddObserver [%p]", 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]", 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->Schedule(this);
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateService::nsISupports
//-----------------------------------------------------------------------------
NS_IMPL_ISUPPORTS4(nsOfflineCacheUpdateService,
nsIOfflineCacheUpdateService,
nsIWebProgressListener,
nsIObserver,
nsISupportsWeakReference)
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateService <public>
//-----------------------------------------------------------------------------
nsOfflineCacheUpdateService::nsOfflineCacheUpdateService()
: mDisabled(PR_FALSE)
, mUpdateRunning(PR_FALSE)
{
}
nsOfflineCacheUpdateService::~nsOfflineCacheUpdateService()
{
gOfflineCacheUpdateService = nsnull;
}
nsresult
nsOfflineCacheUpdateService::Init()
{
nsresult rv;
#if defined(PR_LOGGING)
if (!gOfflineCacheUpdateLog)
gOfflineCacheUpdateLog = PR_NewLogModule("nsOfflineCacheUpdate");
#endif
if (!mDocUpdates.Init())
return NS_ERROR_FAILURE;
// Observe xpcom-shutdown event
nsCOMPtr<nsIObserverService> observerService =
do_GetService("@mozilla.org/observer-service;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
rv = observerService->AddObserver(this,
NS_XPCOM_SHUTDOWN_OBSERVER_ID,
PR_TRUE);
NS_ENSURE_SUCCESS(rv, rv);
// Register as an observer for the document loader
nsCOMPtr<nsIWebProgress> progress =
do_GetService(NS_DOCUMENTLOADER_SERVICE_CONTRACTID);
if (progress) {
nsresult rv = progress->AddProgressListener
(this, nsIWebProgress::NOTIFY_STATE_DOCUMENT);
NS_ENSURE_SUCCESS(rv, rv);
}
gOfflineCacheUpdateService = this;
return NS_OK;
}
/* static */
nsOfflineCacheUpdateService *
nsOfflineCacheUpdateService::GetInstance()
{
if (!gOfflineCacheUpdateService) {
gOfflineCacheUpdateService = new nsOfflineCacheUpdateService();
if (!gOfflineCacheUpdateService)
return nsnull;
NS_ADDREF(gOfflineCacheUpdateService);
nsresult rv = gOfflineCacheUpdateService->Init();
if (NS_FAILED(rv)) {
NS_RELEASE(gOfflineCacheUpdateService);
return nsnull;
}
return gOfflineCacheUpdateService;
}
NS_ADDREF(gOfflineCacheUpdateService);
return gOfflineCacheUpdateService;
}
/* static */
nsOfflineCacheUpdateService *
nsOfflineCacheUpdateService::EnsureService()
{
if (!gOfflineCacheUpdateService) {
// Make the service manager hold a long-lived reference to the service
nsCOMPtr<nsIOfflineCacheUpdateService> service =
do_GetService(NS_OFFLINECACHEUPDATESERVICE_CONTRACTID);
}
return gOfflineCacheUpdateService;
}
nsresult
nsOfflineCacheUpdateService::Schedule(nsOfflineCacheUpdate *aUpdate)
{
LOG(("nsOfflineCacheUpdateService::Schedule [%p, update=%p]",
this, aUpdate));
nsresult rv;
nsCOMPtr<nsIObserverService> observerService =
do_GetService("@mozilla.org/observer-service;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
observerService->NotifyObservers(static_cast<nsIOfflineCacheUpdate*>(aUpdate),
"offline-cache-update-added",
nsnull);
mUpdates.AppendElement(aUpdate);
ProcessNextUpdate();
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateService::ScheduleOnDocumentStop(nsIURI *aManifestURI,
nsIURI *aDocumentURI,
nsIDOMDocument *aDocument)
{
LOG(("nsOfflineCacheUpdateService::ScheduleOnDocumentStop [%p, manifestURI=%p, documentURI=%p doc=%p]",
this, aManifestURI, aDocumentURI, aDocument));
PendingUpdate *update = new PendingUpdate();
update->mManifestURI = aManifestURI;
update->mDocumentURI = aDocumentURI;
if (!mDocUpdates.Put(aDocument, update))
return NS_ERROR_FAILURE;
return NS_OK;
}
nsresult
nsOfflineCacheUpdateService::UpdateFinished(nsOfflineCacheUpdate *aUpdate)
{
LOG(("nsOfflineCacheUpdateService::UpdateFinished [%p, update=%p]",
this, aUpdate));
NS_ASSERTION(mUpdates.Length() > 0 &&
mUpdates[0] == aUpdate, "Unknown update completed");
// keep this item alive until we're done notifying observers
nsRefPtr<nsOfflineCacheUpdate> update = mUpdates[0];
mUpdates.RemoveElementAt(0);
mUpdateRunning = PR_FALSE;
nsresult rv;
nsCOMPtr<nsIObserverService> observerService =
do_GetService("@mozilla.org/observer-service;1", &rv);
NS_ENSURE_SUCCESS(rv, rv);
observerService->NotifyObservers(static_cast<nsIOfflineCacheUpdate*>(aUpdate),
"offline-cache-update-completed",
nsnull);
ProcessNextUpdate();
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateService <private>
//-----------------------------------------------------------------------------
nsresult
nsOfflineCacheUpdateService::ProcessNextUpdate()
{
LOG(("nsOfflineCacheUpdateService::ProcessNextUpdate [%p, num=%d]",
this, mUpdates.Length()));
if (mDisabled)
return NS_ERROR_ABORT;
if (mUpdateRunning)
return NS_OK;
if (mUpdates.Length() > 0) {
mUpdateRunning = PR_TRUE;
return mUpdates[0]->Begin();
}
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateService::nsIOfflineCacheUpdateService
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsOfflineCacheUpdateService::GetNumUpdates(PRUint32 *aNumUpdates)
{
LOG(("nsOfflineCacheUpdateService::GetNumUpdates [%p]", this));
*aNumUpdates = mUpdates.Length();
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateService::GetUpdate(PRUint32 aIndex,
nsIOfflineCacheUpdate **aUpdate)
{
LOG(("nsOfflineCacheUpdateService::GetUpdate [%p, %d]", this, aIndex));
if (aIndex < mUpdates.Length()) {
NS_ADDREF(*aUpdate = mUpdates[aIndex]);
} else {
*aUpdate = nsnull;
}
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateService::ScheduleUpdate(nsIURI *aManifestURI,
nsIURI *aDocumentURI,
nsIOfflineCacheUpdate **aUpdate)
{
// Check for existing updates
nsresult rv;
for (PRUint32 i = 0; i < mUpdates.Length(); i++) {
nsRefPtr<nsOfflineCacheUpdate> update = mUpdates[i];
PRBool partial;
rv = update->GetPartial(&partial);
NS_ENSURE_SUCCESS(rv, rv);
if (partial) {
// Partial updates aren't considered
continue;
}
nsCOMPtr<nsIURI> manifestURI;
update->GetManifestURI(getter_AddRefs(manifestURI));
if (manifestURI) {
PRBool equals;
rv = manifestURI->Equals(aManifestURI, &equals);
if (equals) {
NS_ADDREF(*aUpdate = update);
return NS_OK;
}
}
}
// There is no existing update, start one.
nsRefPtr<nsOfflineCacheUpdate> update = new nsOfflineCacheUpdate();
if (!update)
return NS_ERROR_OUT_OF_MEMORY;
rv = update->Init(PR_FALSE, aManifestURI, aDocumentURI);
NS_ENSURE_SUCCESS(rv, rv);
rv = update->Schedule();
NS_ENSURE_SUCCESS(rv, rv);
NS_ADDREF(*aUpdate = update);
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateService::nsIObserver
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsOfflineCacheUpdateService::Observe(nsISupports *aSubject,
const char *aTopic,
const PRUnichar *aData)
{
if (!strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)) {
if (mUpdates.Length() > 0)
mUpdates[0]->Cancel();
mDisabled = PR_TRUE;
}
return NS_OK;
}
//-----------------------------------------------------------------------------
// nsOfflineCacheUpdateService::nsIWebProgressListener
//-----------------------------------------------------------------------------
NS_IMETHODIMP
nsOfflineCacheUpdateService::OnProgressChange(nsIWebProgress *aProgress,
nsIRequest *aRequest,
PRInt32 curSelfProgress,
PRInt32 maxSelfProgress,
PRInt32 curTotalProgress,
PRInt32 maxTotalProgress)
{
NS_NOTREACHED("notification excluded in AddProgressListener(...)");
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateService::OnStateChange(nsIWebProgress* aWebProgress,
nsIRequest *aRequest,
PRUint32 progressStateFlags,
nsresult aStatus)
{
if ((progressStateFlags & STATE_IS_DOCUMENT) &&
(progressStateFlags & STATE_STOP)) {
if (mDocUpdates.Count() == 0)
return NS_OK;
nsCOMPtr<nsIDOMWindow> window;
aWebProgress->GetDOMWindow(getter_AddRefs(window));
if (!window) return NS_OK;
nsCOMPtr<nsIDOMDocument> doc;
window->GetDocument(getter_AddRefs(doc));
if (!doc) return NS_OK;
LOG(("nsOfflineCacheUpdateService::OnStateChange [%p, doc=%p]",
this, doc.get()));
PendingUpdate *pendingUpdate;
if (mDocUpdates.Get(doc, &pendingUpdate)) {
// Only schedule the update if the document loaded successfull
if (NS_SUCCEEDED(aStatus)) {
nsCOMPtr<nsIOfflineCacheUpdate> update;
ScheduleUpdate(pendingUpdate->mManifestURI,
pendingUpdate->mDocumentURI,
getter_AddRefs(update));
}
mDocUpdates.Remove(doc);
}
return NS_OK;
}
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateService::OnLocationChange(nsIWebProgress* aWebProgress,
nsIRequest* aRequest,
nsIURI *location)
{
NS_NOTREACHED("notification excluded in AddProgressListener(...)");
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateService::OnStatusChange(nsIWebProgress* aWebProgress,
nsIRequest* aRequest,
nsresult aStatus,
const PRUnichar* aMessage)
{
NS_NOTREACHED("notification excluded in AddProgressListener(...)");
return NS_OK;
}
NS_IMETHODIMP
nsOfflineCacheUpdateService::OnSecurityChange(nsIWebProgress *aWebProgress,
nsIRequest *aRequest,
PRUint32 state)
{
NS_NOTREACHED("notification excluded in AddProgressListener(...)");
return NS_OK;
}
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