/* -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #include "nsOfflineCacheUpdate.h" #include "nsCPrefetchService.h" #include "nsCURILoader.h" #include "nsIApplicationCacheContainer.h" #include "nsIApplicationCacheChannel.h" #include "nsIApplicationCacheService.h" #include "nsICachingChannel.h" #include "nsIContent.h" #include "mozilla/dom/Element.h" #include "nsIDocumentLoader.h" #include "nsIDOMWindow.h" #include "nsIDOMOfflineResourceList.h" #include "nsIDocument.h" #include "nsIObserverService.h" #include "nsIURL.h" #include "nsIURIMutator.h" #include "nsIWebProgress.h" #include "nsICryptoHash.h" #include "nsICacheEntry.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 "nsIConsoleService.h" #include "mozilla/Logging.h" #include "nsIAsyncVerifyRedirectCallback.h" #include "mozilla/Preferences.h" #include "mozilla/Attributes.h" #include "nsContentUtils.h" #include "nsIPrincipal.h" #include "nsXULAppAPI.h" using namespace mozilla; static const uint32_t kRescheduleLimit = 3; // Max number of retries for every entry of pinned app. static const uint32_t kPinnedEntryRetriesLimit = 3; // Maximum number of parallel items loads static const uint32_t kParallelLoadLimit = 15; // Quota for offline apps when preloading static const int32_t kCustomProfileQuota = 512000; // // To enable logging (see mozilla/Logging.h for full details): // // set MOZ_LOG=nsOfflineCacheUpdate:5 // set MOZ_LOG_FILE=offlineupdate.log // // this enables LogLevel::Debug level information and places all output in // the file offlineupdate.log // extern LazyLogModule gOfflineCacheUpdateLog; #undef LOG #define LOG(args) MOZ_LOG(gOfflineCacheUpdateLog, mozilla::LogLevel::Debug, args) #undef LOG_ENABLED #define LOG_ENABLED() MOZ_LOG_TEST(gOfflineCacheUpdateLog, mozilla::LogLevel::Debug) class AutoFreeArray { public: AutoFreeArray(uint32_t count, char **values) : mCount(count), mValues(values) {}; ~AutoFreeArray() { NS_FREE_XPCOM_ALLOCATED_POINTER_ARRAY(mCount, mValues); } private: uint32_t mCount; char **mValues; }; namespace { nsresult DropReferenceFromURL(nsCOMPtr& aURI) { // XXXdholbert If this SetRef fails, callers of this method probably // want to call aURI->CloneIgnoringRef() and use the result of that. return NS_MutateURI(aURI) .SetRef(EmptyCString()) .Finalize(aURI); } void LogToConsole(const char * message, nsOfflineCacheUpdateItem * item = nullptr) { nsCOMPtr consoleService = do_GetService(NS_CONSOLESERVICE_CONTRACTID); if (consoleService) { nsAutoString messageUTF16 = NS_ConvertUTF8toUTF16(message); if (item && item->mURI) { messageUTF16.AppendLiteral(", URL="); messageUTF16.Append( NS_ConvertUTF8toUTF16(item->mURI->GetSpecOrDefault())); } consoleService->LogStringMessage(messageUTF16.get()); } } } // namespace //----------------------------------------------------------------------------- // nsManifestCheck //----------------------------------------------------------------------------- class nsManifestCheck final : public nsIStreamListener , public nsIChannelEventSink , public nsIInterfaceRequestor { public: nsManifestCheck(nsOfflineCacheUpdate *aUpdate, nsIURI *aURI, nsIURI *aReferrerURI, nsIPrincipal* aLoadingPrincipal) : mUpdate(aUpdate) , mURI(aURI) , mReferrerURI(aReferrerURI) , mLoadingPrincipal(aLoadingPrincipal) {} NS_DECL_ISUPPORTS NS_DECL_NSIREQUESTOBSERVER NS_DECL_NSISTREAMLISTENER NS_DECL_NSICHANNELEVENTSINK NS_DECL_NSIINTERFACEREQUESTOR nsresult Begin(); private: ~nsManifestCheck() {} static nsresult ReadManifest(nsIInputStream *aInputStream, void *aClosure, const char *aFromSegment, uint32_t aOffset, uint32_t aCount, uint32_t *aBytesConsumed); RefPtr mUpdate; nsCOMPtr mURI; nsCOMPtr mReferrerURI; nsCOMPtr mLoadingPrincipal; nsCOMPtr mManifestHash; nsCOMPtr mChannel; }; //----------------------------------------------------------------------------- // nsManifestCheck::nsISupports //----------------------------------------------------------------------------- NS_IMPL_ISUPPORTS(nsManifestCheck, nsIRequestObserver, nsIStreamListener, nsIChannelEventSink, nsIInterfaceRequestor) //----------------------------------------------------------------------------- // nsManifestCheck //----------------------------------------------------------------------------- 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, mLoadingPrincipal, nsILoadInfo::SEC_REQUIRE_SAME_ORIGIN_DATA_IS_BLOCKED, nsIContentPolicy::TYPE_OTHER, nullptr, // PerformanceStorage nullptr, // loadGroup nullptr, // aCallbacks nsIRequest::LOAD_BYPASS_CACHE); NS_ENSURE_SUCCESS(rv, rv); // configure HTTP specific stuff nsCOMPtr httpChannel = do_QueryInterface(mChannel); if (httpChannel) { rv = httpChannel->SetReferrer(mReferrerURI); MOZ_ASSERT(NS_SUCCEEDED(rv)); rv = httpChannel->SetRequestHeader(NS_LITERAL_CSTRING("X-Moz"), NS_LITERAL_CSTRING("offline-resource"), false); MOZ_ASSERT(NS_SUCCEEDED(rv)); } return mChannel->AsyncOpen2(this); } //----------------------------------------------------------------------------- // nsManifestCheck //----------------------------------------------------------------------------- /* static */ nsresult nsManifestCheck::ReadManifest(nsIInputStream *aInputStream, void *aClosure, const char *aFromSegment, uint32_t aOffset, uint32_t aCount, uint32_t *aBytesConsumed) { nsManifestCheck *manifestCheck = static_cast(aClosure); nsresult rv; *aBytesConsumed = aCount; rv = manifestCheck->mManifestHash->Update( reinterpret_cast(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, uint64_t aOffset, uint32_t aCount) { uint32_t bytesRead; aStream->ReadSegments(ReadManifest, this, aCount, &bytesRead); return NS_OK; } NS_IMETHODIMP nsManifestCheck::OnStopRequest(nsIRequest *aRequest, nsISupports *aContext, nsresult aStatus) { nsAutoCString 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(this); return NS_OK; } return NS_ERROR_NO_INTERFACE; } //----------------------------------------------------------------------------- // nsManifestCheck::nsIChannelEventSink //----------------------------------------------------------------------------- NS_IMETHODIMP nsManifestCheck::AsyncOnChannelRedirect(nsIChannel *aOldChannel, nsIChannel *aNewChannel, uint32_t 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; } LogToConsole("Manifest check failed because its response is a redirect"); aOldChannel->Cancel(NS_ERROR_ABORT); return NS_ERROR_ABORT; } //----------------------------------------------------------------------------- // nsOfflineCacheUpdateItem::nsISupports //----------------------------------------------------------------------------- NS_IMPL_ISUPPORTS(nsOfflineCacheUpdateItem, nsIRequestObserver, nsIStreamListener, nsIRunnable, nsIInterfaceRequestor, nsIChannelEventSink) //----------------------------------------------------------------------------- // nsOfflineCacheUpdateItem //----------------------------------------------------------------------------- nsOfflineCacheUpdateItem::nsOfflineCacheUpdateItem(nsIURI *aURI, nsIURI *aReferrerURI, nsIPrincipal* aLoadingPrincipal, nsIApplicationCache *aApplicationCache, nsIApplicationCache *aPreviousApplicationCache, uint32_t type, uint32_t loadFlags) : mURI(aURI) , mReferrerURI(aReferrerURI) , mLoadingPrincipal(aLoadingPrincipal) , mApplicationCache(aApplicationCache) , mPreviousApplicationCache(aPreviousApplicationCache) , mItemType(type) , mLoadFlags(loadFlags) , mChannel(nullptr) , mState(LoadStatus::UNINITIALIZED) , mBytesRead(0) { } nsOfflineCacheUpdateItem::~nsOfflineCacheUpdateItem() { } nsresult nsOfflineCacheUpdateItem::OpenChannel(nsOfflineCacheUpdate *aUpdate) { if (LOG_ENABLED()) { LOG(("%p: Opening channel for %s", this, mURI->GetSpecOrDefault().get())); } if (mUpdate) { // Holding a reference to the update means this item is already // in progress (has a channel, or is just in between OnStopRequest() // and its Run() call. We must never open channel on this item again. LOG((" %p is already running! ignoring", this)); return NS_ERROR_ALREADY_OPENED; } nsresult rv = nsOfflineCacheUpdate::GetCacheKey(mURI, mCacheKey); NS_ENSURE_SUCCESS(rv, rv); uint32_t flags = nsIRequest::LOAD_BACKGROUND | nsICachingChannel::LOAD_ONLY_IF_MODIFIED; if (mApplicationCache == mPreviousApplicationCache) { // Same app cache to read from and to write to is used during // an only-update-check procedure. Here we protect the existing // cache from being modified. flags |= nsIRequest::INHIBIT_CACHING; } flags |= mLoadFlags; rv = NS_NewChannel(getter_AddRefs(mChannel), mURI, mLoadingPrincipal, nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_IS_NULL, nsIContentPolicy::TYPE_OTHER, nullptr, // PerformanceStorage nullptr, // aLoadGroup this, // aCallbacks flags); NS_ENSURE_SUCCESS(rv, rv); nsCOMPtr 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); // Set the new application cache as the target for write. rv = appCacheChannel->SetApplicationCacheForWrite(mApplicationCache); NS_ENSURE_SUCCESS(rv, rv); // configure HTTP specific stuff nsCOMPtr httpChannel = do_QueryInterface(mChannel); if (httpChannel) { rv = httpChannel->SetReferrer(mReferrerURI); MOZ_ASSERT(NS_SUCCEEDED(rv)); rv = httpChannel->SetRequestHeader(NS_LITERAL_CSTRING("X-Moz"), NS_LITERAL_CSTRING("offline-resource"), false); MOZ_ASSERT(NS_SUCCEEDED(rv)); } rv = mChannel->AsyncOpen2(this); NS_ENSURE_SUCCESS(rv, rv); mUpdate = aUpdate; mState = LoadStatus::REQUESTED; return NS_OK; } nsresult nsOfflineCacheUpdateItem::Cancel() { if (mChannel) { mChannel->Cancel(NS_ERROR_ABORT); mChannel = nullptr; } mState = LoadStatus::UNINITIALIZED; return NS_OK; } //----------------------------------------------------------------------------- // nsOfflineCacheUpdateItem::nsIStreamListener //----------------------------------------------------------------------------- NS_IMETHODIMP nsOfflineCacheUpdateItem::OnStartRequest(nsIRequest *aRequest, nsISupports *aContext) { mState = LoadStatus::RECEIVING; return NS_OK; } NS_IMETHODIMP nsOfflineCacheUpdateItem::OnDataAvailable(nsIRequest *aRequest, nsISupports *aContext, nsIInputStream *aStream, uint64_t aOffset, uint32_t aCount) { uint32_t bytesRead = 0; aStream->ReadSegments(NS_DiscardSegment, nullptr, aCount, &bytesRead); mBytesRead += bytesRead; LOG(("loaded %u bytes into offline cache [offset=%" PRIu64 "]\n", bytesRead, aOffset)); mUpdate->OnByteProgress(bytesRead); return NS_OK; } NS_IMETHODIMP nsOfflineCacheUpdateItem::OnStopRequest(nsIRequest *aRequest, nsISupports *aContext, nsresult aStatus) { if (LOG_ENABLED()) { LOG(("%p: Done fetching offline item %s [status=%" PRIx32 "]\n", this, mURI->GetSpecOrDefault().get(), static_cast(aStatus))); } 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); mUpdate->OnByteProgress(mBytesRead); } if (NS_FAILED(aStatus)) { nsCOMPtr httpChannel = do_QueryInterface(mChannel); if (httpChannel) { bool isNoStore; if (NS_SUCCEEDED(httpChannel->IsNoStoreResponse(&isNoStore)) && isNoStore) { LogToConsole("Offline cache manifest item has Cache-control: no-store header", this); } } } // 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() { // Set mState to LOADED here rather than in OnStopRequest to prevent // race condition when checking state of all mItems in ProcessNextURI(). // If state would have been set in OnStopRequest we could mistakenly // take this item as already finished and finish the update process too // early when ProcessNextURI() would get called between OnStopRequest() // and Run() of this item. Finish() would then have been called twice. mState = LoadStatus::LOADED; RefPtr update; update.swap(mUpdate); update->LoadCompleted(this); 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(this); return NS_OK; } return NS_ERROR_NO_INTERFACE; } //----------------------------------------------------------------------------- // nsOfflineCacheUpdateItem::nsIChannelEventSink //----------------------------------------------------------------------------- NS_IMETHODIMP nsOfflineCacheUpdateItem::AsyncOnChannelRedirect(nsIChannel *aOldChannel, nsIChannel *aNewChannel, uint32_t 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. LogToConsole("Offline cache manifest failed because an item redirects", this); aOldChannel->Cancel(NS_ERROR_ABORT); return NS_ERROR_ABORT; } nsCOMPtr newURI; nsresult rv = aNewChannel->GetURI(getter_AddRefs(newURI)); if (NS_FAILED(rv)) return rv; nsCOMPtr appCacheChannel = do_QueryInterface(aNewChannel); if (appCacheChannel) { rv = appCacheChannel->SetApplicationCacheForWrite(mApplicationCache); NS_ENSURE_SUCCESS(rv, rv); } nsAutoCString 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 httpChannel = do_QueryInterface(aNewChannel); NS_ENSURE_STATE(httpChannel); rv = httpChannel->SetRequestHeader(NS_LITERAL_CSTRING("X-Moz"), NS_LITERAL_CSTRING("offline-resource"), false); MOZ_ASSERT(NS_SUCCEEDED(rv)); mChannel = aNewChannel; cb->OnRedirectVerifyCallback(NS_OK); return NS_OK; } nsresult nsOfflineCacheUpdateItem::GetRequestSucceeded(bool * succeeded) { *succeeded = false; if (!mChannel) return NS_OK; nsresult rv; nsCOMPtr 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%08" PRIx32, static_cast(channelStatus))); return NS_OK; } *succeeded = true; return NS_OK; } bool nsOfflineCacheUpdateItem::IsScheduled() { return mState == LoadStatus::UNINITIALIZED; } bool nsOfflineCacheUpdateItem::IsInProgress() { return mState == LoadStatus::REQUESTED || mState == LoadStatus::RECEIVING; } bool nsOfflineCacheUpdateItem::IsCompleted() { return mState == LoadStatus::LOADED; } nsresult nsOfflineCacheUpdateItem::GetStatus(uint16_t *aStatus) { if (!mChannel) { *aStatus = 0; return NS_OK; } nsresult rv; nsCOMPtr httpChannel = do_QueryInterface(mChannel, &rv); NS_ENSURE_SUCCESS(rv, rv); uint32_t httpStatus; rv = httpChannel->GetResponseStatus(&httpStatus); if (rv == NS_ERROR_NOT_AVAILABLE) { *aStatus = 0; return NS_OK; } NS_ENSURE_SUCCESS(rv, rv); *aStatus = uint16_t(httpStatus); return NS_OK; } //----------------------------------------------------------------------------- // nsOfflineManifestItem //----------------------------------------------------------------------------- //----------------------------------------------------------------------------- // nsOfflineManifestItem //----------------------------------------------------------------------------- nsOfflineManifestItem::nsOfflineManifestItem(nsIURI *aURI, nsIURI *aReferrerURI, nsIPrincipal* aLoadingPrincipal, nsIApplicationCache *aApplicationCache, nsIApplicationCache *aPreviousApplicationCache) : nsOfflineCacheUpdateItem(aURI, aReferrerURI, aLoadingPrincipal, aApplicationCache, aPreviousApplicationCache, nsIApplicationCache::ITEM_MANIFEST, 0) , mParserState(PARSE_INIT) , mNeedsUpdate(true) , mStrictFileOriginPolicy(false) , mManifestHashInitialized(false) { ReadStrictFileOriginPolicyPref(); } nsOfflineManifestItem::~nsOfflineManifestItem() { } //----------------------------------------------------------------------------- // nsOfflineManifestItem //----------------------------------------------------------------------------- /* static */ nsresult nsOfflineManifestItem::ReadManifest(nsIInputStream *aInputStream, void *aClosure, const char *aFromSegment, uint32_t aOffset, uint32_t aCount, uint32_t *aBytesConsumed) { nsOfflineManifestItem *manifest = static_cast(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 = nullptr; LOG(("Could not initialize manifest hash for byte-to-byte check, rv=%08" PRIx32, static_cast(rv))); } } } if (manifest->mManifestHash) { rv = manifest->mManifestHash->Update(reinterpret_cast(aFromSegment), aCount); if (NS_FAILED(rv)) { manifest->mManifestHash = nullptr; LOG(("Could not update manifest hash, rv=%08" PRIx32, static_cast(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') { rv = manifest->HandleManifestLine(begin, iter); if (NS_FAILED(rv)) { LOG(("HandleManifestLine failed with 0x%08" PRIx32, static_cast(rv))); *aBytesConsumed = 0; // Avoid assertion failure in stream tee 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(uint32_t namespaceType, const nsCString &namespaceSpec, const nsCString &data) { nsresult rv; if (!mNamespaces) { mNamespaces = do_CreateInstance(NS_ARRAY_CONTRACTID, &rv); NS_ENSURE_SUCCESS(rv, rv); } nsCOMPtr 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); NS_ENSURE_SUCCESS(rv, rv); return NS_OK; } static nsresult GetURIDirectory(nsIURI* uri, nsACString &directory) { nsresult rv; nsCOMPtr url(do_QueryInterface(uri, &rv)); NS_ENSURE_SUCCESS(rv, rv); rv = url->GetDirectory(directory); NS_ENSURE_SUCCESS(rv, rv); return NS_OK; } static nsresult CheckFileContainedInPath(nsIURI* file, nsACString const &masterDirectory) { nsresult rv; nsAutoCString directory; rv = GetURIDirectory(file, directory); NS_ENSURE_SUCCESS(rv, rv); bool contains = StringBeginsWith(directory, masterDirectory); if (!contains) { return NS_ERROR_DOM_BAD_URI; } 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(*begin) == 0xef) { if (++begin == end || static_cast(*begin) != 0xbb || ++begin == end || static_cast(*begin) != 0xbf) { mParserState = PARSE_ERROR; LogToConsole("Offline cache manifest BOM error", this); return NS_OK; } ++begin; } const nsACString& magic = Substring(begin, end); if (!magic.EqualsLiteral("CACHE MANIFEST")) { mParserState = PARSE_ERROR; LogToConsole("Offline cache manifest magic incorrect", this); 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 nsACString& 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; } // Every other section type we don't know must be silently ignored. nsCString::const_iterator lastChar = end; if (*(--lastChar) == ':') { mParserState = PARSE_UNKNOWN_SECTION; 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_UNKNOWN_SECTION: { // just jump over return NS_OK; } case PARSE_CACHE_ENTRIES: { nsCOMPtr uri; rv = NS_NewURI(getter_AddRefs(uri), line, nullptr, mURI); if (NS_FAILED(rv)) break; if (NS_FAILED(DropReferenceFromURL(uri))) break; nsAutoCString 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); if (!NS_SecurityCompareURIs(mURI, uri, mStrictFileOriginPolicy)) { mAnonymousURIs.AppendObject(uri); } break; } case PARSE_FALLBACK_ENTRIES: { int32_t 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 namespaceURI; rv = NS_NewURI(getter_AddRefs(namespaceURI), namespaceSpec, nullptr, mURI); if (NS_FAILED(rv)) break; if (NS_FAILED(DropReferenceFromURL(namespaceURI))) break; rv = namespaceURI->GetAsciiSpec(namespaceSpec); if (NS_FAILED(rv)) break; nsCOMPtr fallbackURI; rv = NS_NewURI(getter_AddRefs(fallbackURI), fallbackSpec, nullptr, mURI); if (NS_FAILED(rv)) break; if (NS_FAILED(DropReferenceFromURL(fallbackURI))) break; rv = fallbackURI->GetAsciiSpec(fallbackSpec); if (NS_FAILED(rv)) break; // The following set of checks is preventing a website under // a subdirectory to add fallback pages for the whole origin // (or a parent directory) to prevent fallback attacks. nsAutoCString manifestDirectory; rv = GetURIDirectory(mURI, manifestDirectory); if (NS_FAILED(rv)) { break; } rv = CheckFileContainedInPath(namespaceURI, manifestDirectory); if (NS_FAILED(rv)) { break; } rv = CheckFileContainedInPath(fallbackURI, manifestDirectory); 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 bypassURI; rv = NS_NewURI(getter_AddRefs(bypassURI), line, nullptr, mURI); if (NS_FAILED(rv)) break; nsAutoCString 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 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 cacheToken; cachingChannel->GetCacheToken(getter_AddRefs(cacheToken)); if (cacheToken) { nsCOMPtr 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 = nullptr; if (NS_FAILED(rv)) { LOG(("Could not finish manifest hash, rv=%08" PRIx32, static_cast(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 cachingChannel = do_QueryInterface(aRequest, &rv); NS_ENSURE_SUCCESS(rv, rv); nsCOMPtr cacheToken; cachingChannel->GetOfflineCacheToken(getter_AddRefs(cacheToken)); if (cacheToken) { nsCOMPtr 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 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")); LogToConsole("Offline cache manifest HTTP request failed", this); 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, uint64_t aOffset, uint32_t aCount) { uint32_t 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=%" PRIu64 "]\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) { if (mBytesRead == 0) { // We didn't need to read (because LOAD_ONLY_IF_MODIFIED was // specified). mNeedsUpdate = false; } else { // 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); rv = CheckNewManifestContentHash(aRequest); NS_ENSURE_SUCCESS(rv, rv); } return nsOfflineCacheUpdateItem::OnStopRequest(aRequest, aContext, aStatus); } //----------------------------------------------------------------------------- // nsOfflineCacheUpdate::nsISupports //----------------------------------------------------------------------------- NS_IMPL_ISUPPORTS(nsOfflineCacheUpdate, nsIOfflineCacheUpdateObserver, nsIOfflineCacheUpdate, nsIRunnable) //----------------------------------------------------------------------------- // nsOfflineCacheUpdate //----------------------------------------------------------------------------- nsOfflineCacheUpdate::nsOfflineCacheUpdate() : mState(STATE_UNINITIALIZED) , mAddedItems(false) , mPartialUpdate(false) , mOnlyCheckUpdate(false) , mSucceeded(true) , mObsolete(false) , mItemsInProgress(0) , mRescheduleCount(0) , mPinnedEntryRetriesCount(0) , mPinned(false) , mByteProgress(0) { } nsOfflineCacheUpdate::~nsOfflineCacheUpdate() { LOG(("nsOfflineCacheUpdate::~nsOfflineCacheUpdate [%p]", this)); } /* static */ nsresult nsOfflineCacheUpdate::GetCacheKey(nsIURI *aURI, nsACString &aKey) { aKey.Truncate(); nsCOMPtr 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::InitInternal(nsIURI *aManifestURI, nsIPrincipal* aLoadingPrincipal) { nsresult rv; // 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; mLoadingPrincipal = aLoadingPrincipal; rv = mManifestURI->GetAsciiHost(mUpdateDomain); NS_ENSURE_SUCCESS(rv, rv); mPartialUpdate = false; return NS_OK; } nsresult nsOfflineCacheUpdate::Init(nsIURI *aManifestURI, nsIURI *aDocumentURI, nsIPrincipal* aLoadingPrincipal, nsIDocument *aDocument, nsIFile *aCustomProfileDir) { nsresult rv; // Make sure the service has been initialized nsOfflineCacheUpdateService* service = nsOfflineCacheUpdateService::EnsureService(); if (!service) return NS_ERROR_FAILURE; LOG(("nsOfflineCacheUpdate::Init [%p]", this)); rv = InitInternal(aManifestURI, aLoadingPrincipal); NS_ENSURE_SUCCESS(rv, rv); nsCOMPtr cacheService = do_GetService(NS_APPLICATIONCACHESERVICE_CONTRACTID, &rv); NS_ENSURE_SUCCESS(rv, rv); nsAutoCString originSuffix; rv = aLoadingPrincipal->GetOriginSuffix(originSuffix); NS_ENSURE_SUCCESS(rv, rv); mDocumentURI = aDocumentURI; if (aCustomProfileDir) { rv = cacheService->BuildGroupIDForSuffix(aManifestURI, originSuffix, mGroupID); NS_ENSURE_SUCCESS(rv, rv); // Create only a new offline application cache in the custom profile // This is a preload of a new cache. // XXX Custom updates don't support "updating" of an existing cache // in the custom profile at the moment. This support can be, though, // simply added as well when needed. mPreviousApplicationCache = nullptr; rv = cacheService->CreateCustomApplicationCache(mGroupID, aCustomProfileDir, kCustomProfileQuota, getter_AddRefs(mApplicationCache)); NS_ENSURE_SUCCESS(rv, rv); mCustomProfileDir = aCustomProfileDir; } else { rv = cacheService->BuildGroupIDForSuffix(aManifestURI, originSuffix, mGroupID); NS_ENSURE_SUCCESS(rv, rv); rv = cacheService->GetActiveCache(mGroupID, getter_AddRefs(mPreviousApplicationCache)); NS_ENSURE_SUCCESS(rv, rv); rv = cacheService->CreateApplicationCache(mGroupID, getter_AddRefs(mApplicationCache)); NS_ENSURE_SUCCESS(rv, rv); } rv = nsOfflineCacheUpdateService::OfflineAppPinnedForURI(aDocumentURI, nullptr, &mPinned); NS_ENSURE_SUCCESS(rv, rv); mState = STATE_INITIALIZED; return NS_OK; } nsresult nsOfflineCacheUpdate::InitForUpdateCheck(nsIURI *aManifestURI, nsIPrincipal* aLoadingPrincipal, nsIObserver *aObserver) { nsresult rv; // Make sure the service has been initialized nsOfflineCacheUpdateService* service = nsOfflineCacheUpdateService::EnsureService(); if (!service) return NS_ERROR_FAILURE; LOG(("nsOfflineCacheUpdate::InitForUpdateCheck [%p]", this)); rv = InitInternal(aManifestURI, aLoadingPrincipal); NS_ENSURE_SUCCESS(rv, rv); nsCOMPtr cacheService = do_GetService(NS_APPLICATIONCACHESERVICE_CONTRACTID, &rv); NS_ENSURE_SUCCESS(rv, rv); nsAutoCString originSuffix; rv = aLoadingPrincipal->GetOriginSuffix(originSuffix); NS_ENSURE_SUCCESS(rv, rv); rv = cacheService->BuildGroupIDForSuffix(aManifestURI, originSuffix, mGroupID); NS_ENSURE_SUCCESS(rv, rv); rv = cacheService->GetActiveCache(mGroupID, getter_AddRefs(mPreviousApplicationCache)); NS_ENSURE_SUCCESS(rv, rv); // To load the manifest properly using current app cache to satisfy and // also to compare the cached content hash value we have to set 'some' // app cache to write to on the channel. Otherwise the cached version will // be used and no actual network request will be made. We use the same // app cache here. OpenChannel prevents caching in this case using // INHIBIT_CACHING load flag. mApplicationCache = mPreviousApplicationCache; rv = nsOfflineCacheUpdateService::OfflineAppPinnedForURI(aManifestURI, nullptr, &mPinned); NS_ENSURE_SUCCESS(rv, rv); mUpdateAvailableObserver = aObserver; mOnlyCheckUpdate = true; mState = STATE_INITIALIZED; return NS_OK; } nsresult nsOfflineCacheUpdate::InitPartial(nsIURI *aManifestURI, const nsACString& clientID, nsIURI *aDocumentURI, nsIPrincipal *aLoadingPrincipal) { 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; mDocumentURI = aDocumentURI; mLoadingPrincipal = aLoadingPrincipal; mManifestURI = aManifestURI; rv = mManifestURI->GetAsciiHost(mUpdateDomain); NS_ENSURE_SUCCESS(rv, rv); nsCOMPtr cacheService = do_GetService(NS_APPLICATIONCACHESERVICE_CONTRACTID, &rv); NS_ENSURE_SUCCESS(rv, rv); rv = cacheService->GetApplicationCache(clientID, getter_AddRefs(mApplicationCache)); NS_ENSURE_SUCCESS(rv, rv); if (!mApplicationCache) { nsAutoCString manifestSpec; rv = GetCacheKey(mManifestURI, manifestSpec); NS_ENSURE_SUCCESS(rv, rv); rv = cacheService->CreateApplicationCache (manifestSpec, getter_AddRefs(mApplicationCache)); NS_ENSURE_SUCCESS(rv, rv); } rv = mApplicationCache->GetManifestURI(getter_AddRefs(mManifestURI)); NS_ENSURE_SUCCESS(rv, rv); nsAutoCString groupID; rv = mApplicationCache->GetGroupID(groupID); NS_ENSURE_SUCCESS(rv, rv); rv = nsOfflineCacheUpdateService::OfflineAppPinnedForURI(aDocumentURI, nullptr, &mPinned); 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 &manifestURIs = mManifestItem->GetExplicitURIs(); for (int32_t i = 0; i < manifestURIs.Count(); i++) { rv = AddURI(manifestURIs[i], nsIApplicationCache::ITEM_EXPLICIT); NS_ENSURE_SUCCESS(rv, rv); } const nsCOMArray &anonURIs = mManifestItem->GetAnonymousURIs(); for (int32_t i = 0; i < anonURIs.Count(); i++) { rv = AddURI(anonURIs[i], nsIApplicationCache::ITEM_EXPLICIT, nsIRequest::LOAD_ANONYMOUS); NS_ENSURE_SUCCESS(rv, rv); } const nsCOMArray &fallbackURIs = mManifestItem->GetFallbackURIs(); for (int32_t 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; } bool nsOfflineCacheUpdate::CheckUpdateAvailability() { nsresult rv; bool succeeded; rv = mManifestItem->GetRequestSucceeded(&succeeded); NS_ENSURE_SUCCESS(rv, false); if (!succeeded || !mManifestItem->ParseSucceeded()) { return false; } if (!mPinned) { uint16_t status; rv = mManifestItem->GetStatus(&status); NS_ENSURE_SUCCESS(rv, false); // Treat these as there would be an update available, // since this is indication of demand to remove this // offline cache. if (status == 404 || status == 410) { return true; } } return mManifestItem->NeedsUpdate(); } void nsOfflineCacheUpdate::LoadCompleted(nsOfflineCacheUpdateItem *aItem) { nsresult rv; LOG(("nsOfflineCacheUpdate::LoadCompleted [%p]", this)); if (mState == STATE_FINISHED) { LOG((" after completion, ignoring")); return; } // Keep the object alive through a Finish() call. nsCOMPtr kungFuDeathGrip(this); if (mState == STATE_CANCELLED) { NotifyState(nsIOfflineCacheUpdateObserver::STATE_ERROR); Finish(); return; } if (mState == STATE_CHECKING) { // Manifest load finished. if (mOnlyCheckUpdate) { Finish(); NotifyUpdateAvailability(CheckUpdateAvailability()); return; } NS_ASSERTION(mManifestItem, "Must have a manifest item in STATE_CHECKING."); NS_ASSERTION(mManifestItem == aItem, "Unexpected aItem in nsOfflineCacheUpdate::LoadCompleted"); // 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. uint16_t status; rv = mManifestItem->GetStatus(&status); if (status == 404 || status == 410) { LogToConsole("Offline cache manifest removed, cache cleared", mManifestItem); mSucceeded = false; if (mPreviousApplicationCache) { if (mPinned) { // Do not obsolete a pinned application. NotifyState(nsIOfflineCacheUpdateObserver::STATE_NOUPDATE); } else { NotifyState(nsIOfflineCacheUpdateObserver::STATE_OBSOLETE); mObsolete = true; } } else { NotifyState(nsIOfflineCacheUpdateObserver::STATE_ERROR); mObsolete = true; } Finish(); return; } bool doUpdate; if (NS_FAILED(HandleManifest(&doUpdate))) { mSucceeded = false; NotifyState(nsIOfflineCacheUpdateObserver::STATE_ERROR); Finish(); return; } if (!doUpdate) { LogToConsole("Offline cache doesn't need to update", mManifestItem); 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. if (mItemsInProgress) // Just to be safe here! --mItemsInProgress; bool succeeded; rv = aItem->GetRequestSucceeded(&succeeded); if (mPinned && NS_SUCCEEDED(rv) && succeeded) { uint32_t dummy_cache_type; rv = mApplicationCache->GetTypes(aItem->mCacheKey, &dummy_cache_type); bool item_doomed = NS_FAILED(rv); // can not find it? -> doomed if (item_doomed && mPinnedEntryRetriesCount < kPinnedEntryRetriesLimit && (aItem->mItemType & (nsIApplicationCache::ITEM_EXPLICIT | nsIApplicationCache::ITEM_FALLBACK))) { rv = EvictOneNonPinned(); if (NS_FAILED(rv)) { mSucceeded = false; NotifyState(nsIOfflineCacheUpdateObserver::STATE_ERROR); Finish(); return; } // This reverts the item state to UNINITIALIZED that makes it to // be scheduled for download again. rv = aItem->Cancel(); if (NS_FAILED(rv)) { mSucceeded = false; NotifyState(nsIOfflineCacheUpdateObserver::STATE_ERROR); Finish(); return; } mPinnedEntryRetriesCount++; LogToConsole("An unpinned offline cache deleted"); // Retry this item. ProcessNextURI(); return; } } // According to parallelism this may imply more pinned retries count, // but that is not critical, since at one moment the algorithm will // stop anyway. Also, this code may soon be completely removed // after we have a separate storage for pinned apps. mPinnedEntryRetriesCount = 0; // 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 (aItem->mItemType & (nsIApplicationCache::ITEM_EXPLICIT | nsIApplicationCache::ITEM_FALLBACK)) { LogToConsole("Offline cache manifest item failed to load", aItem); mSucceeded = false; } } else { rv = mApplicationCache->MarkEntry(aItem->mCacheKey, aItem->mItemType); if (NS_FAILED(rv)) { mSucceeded = false; } } if (!mSucceeded) { NotifyState(nsIOfflineCacheUpdateObserver::STATE_ERROR); Finish(); return; } NotifyState(nsIOfflineCacheUpdateObserver::STATE_ITEMCOMPLETED); ProcessNextURI(); } void nsOfflineCacheUpdate::ManifestCheckCompleted(nsresult aStatus, const nsCString &aManifestHash) { // Keep the object alive through a Finish() call. nsCOMPtr kungFuDeathGrip(this); if (NS_SUCCEEDED(aStatus)) { nsAutoCString firstManifestHash; mManifestItem->GetManifestHash(firstManifestHash); if (aManifestHash != firstManifestHash) { LOG(("Manifest has changed during cache items download [%p]", this)); LogToConsole("Offline cache manifest changed during update", mManifestItem); 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(); RefPtr newUpdate = new nsOfflineCacheUpdate(); // Leave aDocument argument null. Only glues and children keep // document instances. newUpdate->Init(mManifestURI, mDocumentURI, mLoadingPrincipal, nullptr, mCustomProfileDir); // 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 (int32_t i = 0; i < mDocumentURIs.Count(); i++) { newUpdate->StickDocument(mDocumentURIs[i]); } newUpdate->mRescheduleCount = mRescheduleCount + 1; newUpdate->AddObserver(this, false); newUpdate->Schedule(); } else { LogToConsole("Offline cache update done", mManifestItem); Finish(); } } nsresult nsOfflineCacheUpdate::Begin() { LOG(("nsOfflineCacheUpdate::Begin [%p]", this)); // Keep the object alive through a ProcessNextURI()/Finish() call. nsCOMPtr kungFuDeathGrip(this); mItemsInProgress = 0; if (mState == STATE_CANCELLED) { nsresult rv = NS_DispatchToMainThread( NewRunnableMethod("nsOfflineCacheUpdate::AsyncFinishWithError", this, &nsOfflineCacheUpdate::AsyncFinishWithError)); NS_ENSURE_SUCCESS(rv, rv); return NS_OK; } if (mPartialUpdate) { mState = STATE_DOWNLOADING; NotifyState(nsIOfflineCacheUpdateObserver::STATE_DOWNLOADING); ProcessNextURI(); return NS_OK; } // Start checking the manifest. mManifestItem = new nsOfflineManifestItem(mManifestURI, mDocumentURI, mLoadingPrincipal, mApplicationCache, mPreviousApplicationCache); if (!mManifestItem) { return NS_ERROR_OUT_OF_MEMORY; } mState = STATE_CHECKING; mByteProgress = 0; NotifyState(nsIOfflineCacheUpdateObserver::STATE_CHECKING); nsresult rv = mManifestItem->OpenChannel(this); if (NS_FAILED(rv)) { LoadCompleted(mManifestItem); } return NS_OK; } //----------------------------------------------------------------------------- // nsOfflineCacheUpdate //----------------------------------------------------------------------------- nsresult nsOfflineCacheUpdate::AddExistingItems(uint32_t aType, nsTArray* 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; } uint32_t count = 0; char **keys = nullptr; nsresult rv = mPreviousApplicationCache->GatherEntries(aType, &count, &keys); NS_ENSURE_SUCCESS(rv, rv); AutoFreeArray autoFree(count, keys); for (uint32_t i = 0; i < count; i++) { if (namespaceFilter) { bool found = false; for (uint32_t j = 0; j < namespaceFilter->Length() && !found; j++) { found = StringBeginsWith(nsDependentCString(keys[i]), namespaceFilter->ElementAt(j)); } if (!found) continue; } nsCOMPtr 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 kungFuDeathGrip(this); LOG(("nsOfflineCacheUpdate::ProcessNextURI [%p, inprogress=%d, numItems=%zu]", this, mItemsInProgress, mItems.Length())); if (mState != STATE_DOWNLOADING) { LOG((" should only be called from the DOWNLOADING state, ignoring")); return NS_ERROR_UNEXPECTED; } nsOfflineCacheUpdateItem * runItem = nullptr; uint32_t completedItems = 0; for (uint32_t i = 0; i < mItems.Length(); ++i) { nsOfflineCacheUpdateItem * item = mItems[i]; if (item->IsScheduled()) { runItem = item; break; } if (item->IsCompleted()) ++completedItems; } if (completedItems == mItems.Length()) { LOG(("nsOfflineCacheUpdate::ProcessNextURI [%p]: all items loaded", this)); 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. RefPtr manifestCheck = new nsManifestCheck(this, mManifestURI, mDocumentURI, mLoadingPrincipal); if (NS_FAILED(manifestCheck->Begin())) { mSucceeded = false; NotifyState(nsIOfflineCacheUpdateObserver::STATE_ERROR); return Finish(); } return NS_OK; } } if (!runItem) { LOG(("nsOfflineCacheUpdate::ProcessNextURI [%p]:" " No more items to include in parallel load", this)); return NS_OK; } if (LOG_ENABLED()) { LOG(("%p: Opening channel for %s", this, runItem->mURI->GetSpecOrDefault().get())); } ++mItemsInProgress; NotifyState(nsIOfflineCacheUpdateObserver::STATE_ITEMSTARTED); nsresult rv = runItem->OpenChannel(this); if (NS_FAILED(rv)) { LoadCompleted(runItem); return rv; } if (mItemsInProgress >= kParallelLoadLimit) { LOG(("nsOfflineCacheUpdate::ProcessNextURI [%p]:" " At parallel load limit", this)); return NS_OK; } // This calls this method again via a post triggering // a parallel item load return NS_DispatchToCurrentThread(this); } void nsOfflineCacheUpdate::GatherObservers(nsCOMArray &aObservers) { for (int32_t i = 0; i < mWeakObservers.Count(); i++) { nsCOMPtr observer = do_QueryReferent(mWeakObservers[i]); if (observer) aObservers.AppendObject(observer); else mWeakObservers.RemoveObjectAt(i--); } for (int32_t i = 0; i < mObservers.Count(); i++) { aObservers.AppendObject(mObservers[i]); } } void nsOfflineCacheUpdate::NotifyState(uint32_t state) { LOG(("nsOfflineCacheUpdate::NotifyState [%p, %d]", this, state)); if (state == STATE_ERROR) { LogToConsole("Offline cache update error", mManifestItem); } nsCOMArray observers; GatherObservers(observers); for (int32_t i = 0; i < observers.Count(); i++) { observers[i]->UpdateStateChanged(this, state); } } void nsOfflineCacheUpdate::NotifyUpdateAvailability(bool updateAvailable) { if (!mUpdateAvailableObserver) return; LOG(("nsOfflineCacheUpdate::NotifyUpdateAvailability [this=%p, avail=%d]", this, updateAvailable)); const char* topic = updateAvailable ? "offline-cache-update-available" : "offline-cache-update-unavailable"; nsCOMPtr observer; observer.swap(mUpdateAvailableObserver); observer->Observe(mManifestURI, topic, nullptr); } void nsOfflineCacheUpdate::AssociateDocuments(nsIApplicationCache* cache) { if (!cache) { LOG(("nsOfflineCacheUpdate::AssociateDocuments bypassed" ", no cache provided [this=%p]", this)); return; } nsCOMArray observers; GatherObservers(observers); for (int32_t i = 0; i < observers.Count(); i++) { observers[i]->ApplicationCacheAvailable(cache); } } 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; } bool nsOfflineCacheUpdate::IsForGroupID(const nsACString& groupID) { return mGroupID == groupID; } bool nsOfflineCacheUpdate::IsForProfile(nsIFile* aCustomProfileDir) { if (!mCustomProfileDir && !aCustomProfileDir) return true; if (!mCustomProfileDir || !aCustomProfileDir) return false; bool equals; nsresult rv = mCustomProfileDir->Equals(aCustomProfileDir, &equals); return NS_SUCCEEDED(rv) && equals; } nsresult nsOfflineCacheUpdate::UpdateFinished(nsOfflineCacheUpdate *aUpdate) { // Keep the object alive through a Finish() call. nsCOMPtr kungFuDeathGrip(this); mImplicitUpdate = nullptr; NotifyState(nsIOfflineCacheUpdateObserver::STATE_NOUPDATE); Finish(); return NS_OK; } void nsOfflineCacheUpdate::OnByteProgress(uint64_t byteIncrement) { mByteProgress += byteIncrement; NotifyState(nsIOfflineCacheUpdateObserver::STATE_ITEMPROGRESS); } nsresult nsOfflineCacheUpdate::ScheduleImplicit() { if (mDocumentURIs.Count() == 0) return NS_OK; nsresult rv; RefPtr update = new nsOfflineCacheUpdate(); NS_ENSURE_TRUE(update, NS_ERROR_OUT_OF_MEMORY); nsAutoCString clientID; if (mPreviousApplicationCache) { rv = mPreviousApplicationCache->GetClientID(clientID); NS_ENSURE_SUCCESS(rv, rv); } else if (mApplicationCache) { rv = mApplicationCache->GetClientID(clientID); NS_ENSURE_SUCCESS(rv, rv); } else { NS_ERROR("Offline cache update not having set mApplicationCache?"); } rv = update->InitPartial(mManifestURI, clientID, mDocumentURI, mLoadingPrincipal); NS_ENSURE_SUCCESS(rv, rv); for (int32_t 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 && !mOnlyCheckUpdate) { 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 appCacheService = do_GetService(NS_APPLICATIONCACHESERVICE_CONTRACTID); if (appCacheService) { nsAutoCString groupID; mApplicationCache->GetGroupID(groupID); appCacheService->DeactivateGroup(groupID); } } if (!mSucceeded) { // Update was not merged, mark all the loads as failures for (uint32_t i = 0; i < mItems.Length(); i++) { mItems[i]->Cancel(); } mApplicationCache->Discard(); } } nsresult rv = NS_OK; if (mOwner) { rv = mOwner->UpdateFinished(this); // mozilla::WeakPtr is missing some key features, like setting it to // null explicitly. mOwner = mozilla::WeakPtr(); } return rv; } nsresult nsOfflineCacheUpdate::Finish() { nsresult rv = FinishNoNotify(); NotifyState(nsIOfflineCacheUpdateObserver::STATE_FINISHED); return rv; } void nsOfflineCacheUpdate::AsyncFinishWithError() { NotifyState(nsOfflineCacheUpdate::STATE_ERROR); Finish(); } static nsresult EvictOneOfCacheGroups(nsIApplicationCacheService *cacheService, uint32_t count, const char * const *groups) { nsresult rv; unsigned int i; for (i = 0; i < count; i++) { nsCOMPtr uri; rv = NS_NewURI(getter_AddRefs(uri), groups[i]); NS_ENSURE_SUCCESS(rv, rv); nsDependentCString group_name(groups[i]); nsCOMPtr cache; rv = cacheService->GetActiveCache(group_name, getter_AddRefs(cache)); // Maybe someone in another thread or process have deleted it. if (NS_FAILED(rv) || !cache) continue; bool pinned; rv = nsOfflineCacheUpdateService::OfflineAppPinnedForURI(uri, nullptr, &pinned); NS_ENSURE_SUCCESS(rv, rv); if (!pinned) { rv = cache->Discard(); return NS_OK; } } return NS_ERROR_FILE_NOT_FOUND; } nsresult nsOfflineCacheUpdate::EvictOneNonPinned() { nsresult rv; nsCOMPtr cacheService = do_GetService(NS_APPLICATIONCACHESERVICE_CONTRACTID, &rv); NS_ENSURE_SUCCESS(rv, rv); uint32_t count; char **groups; rv = cacheService->GetGroupsTimeOrdered(&count, &groups); NS_ENSURE_SUCCESS(rv, rv); rv = EvictOneOfCacheGroups(cacheService, count, groups); NS_FREE_XPCOM_ALLOCATED_POINTER_ARRAY(count, groups); 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(uint16_t *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 || mOnlyCheckUpdate; 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 != nullptr); return NS_OK; } nsresult nsOfflineCacheUpdate::AddURI(nsIURI *aURI, uint32_t aType, uint32_t aLoadFlags) { 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. nsAutoCString 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 (uint32_t i = 0; i < mItems.Length(); i++) { bool equals; if (NS_SUCCEEDED(mItems[i]->mURI->Equals(aURI, &equals)) && equals && mItems[i]->mLoadFlags == aLoadFlags) { // retain both types. mItems[i]->mItemType |= aType; return NS_OK; } } RefPtr item = new nsOfflineCacheUpdateItem(aURI, mDocumentURI, mLoadingPrincipal, mApplicationCache, mPreviousApplicationCache, aType, aLoadFlags); 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) { nsAutoCString key; GetCacheKey(aURI, key); uint32_t 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::Cancel() { LOG(("nsOfflineCacheUpdate::Cancel [%p]", this)); if ((mState == STATE_FINISHED) || (mState == STATE_CANCELLED)) { return NS_ERROR_NOT_AVAILABLE; } mState = STATE_CANCELLED; mSucceeded = false; // Cancel all running downloads for (uint32_t i = 0; i < mItems.Length(); ++i) { nsOfflineCacheUpdateItem * item = mItems[i]; if (item->IsInProgress()) item->Cancel(); } return NS_OK; } 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 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 (int32_t i = 0; i < mWeakObservers.Count(); i++) { nsCOMPtr observer = do_QueryReferent(mWeakObservers[i]); if (observer == aObserver) { mWeakObservers.RemoveObjectAt(i); return NS_OK; } } for (int32_t i = 0; i < mObservers.Count(); i++) { if (mObservers[i] == aObserver) { mObservers.RemoveObjectAt(i); return NS_OK; } } return NS_OK; } NS_IMETHODIMP nsOfflineCacheUpdate::GetByteProgress(uint64_t * _result) { NS_ENSURE_ARG(_result); *_result = mByteProgress; 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, uint32_t 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; } NotifyState(aState); if (aState == nsIOfflineCacheUpdateObserver::STATE_FINISHED) aUpdate->RemoveObserver(this); return NS_OK; } NS_IMETHODIMP nsOfflineCacheUpdate::ApplicationCacheAvailable(nsIApplicationCache *applicationCache) { AssociateDocuments(applicationCache); return NS_OK; } //----------------------------------------------------------------------------- // nsOfflineCacheUpdate::nsIRunable //----------------------------------------------------------------------------- NS_IMETHODIMP nsOfflineCacheUpdate::Run() { ProcessNextURI(); return NS_OK; }