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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /dom/fetch/FetchUtil.cpp
parentInitial commit. (diff)
downloadfirefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'dom/fetch/FetchUtil.cpp')
-rw-r--r--dom/fetch/FetchUtil.cpp814
1 files changed, 814 insertions, 0 deletions
diff --git a/dom/fetch/FetchUtil.cpp b/dom/fetch/FetchUtil.cpp
new file mode 100644
index 0000000000..48281df321
--- /dev/null
+++ b/dom/fetch/FetchUtil.cpp
@@ -0,0 +1,814 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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 "FetchUtil.h"
+
+#include "zlib.h"
+
+#include "js/friend/ErrorMessages.h" // JSMSG_*
+#include "nsCRT.h"
+#include "nsError.h"
+#include "nsIAsyncInputStream.h"
+#include "nsICloneableInputStream.h"
+#include "nsIHttpChannel.h"
+#include "nsNetUtil.h"
+#include "nsStreamUtils.h"
+#include "nsString.h"
+#include "js/BuildId.h"
+#include "mozilla/dom/Document.h"
+
+#include "mozilla/ClearOnShutdown.h"
+#include "mozilla/dom/DOMException.h"
+#include "mozilla/dom/InternalRequest.h"
+#include "mozilla/dom/Response.h"
+#include "mozilla/dom/ReferrerInfo.h"
+#include "mozilla/dom/WorkerRef.h"
+
+namespace mozilla::dom {
+
+// static
+nsresult FetchUtil::GetValidRequestMethod(const nsACString& aMethod,
+ nsCString& outMethod) {
+ nsAutoCString upperCaseMethod(aMethod);
+ ToUpperCase(upperCaseMethod);
+ if (!NS_IsValidHTTPToken(aMethod)) {
+ outMethod.SetIsVoid(true);
+ return NS_ERROR_DOM_SYNTAX_ERR;
+ }
+
+ if (upperCaseMethod.EqualsLiteral("CONNECT") ||
+ upperCaseMethod.EqualsLiteral("TRACE") ||
+ upperCaseMethod.EqualsLiteral("TRACK")) {
+ outMethod.SetIsVoid(true);
+ return NS_ERROR_DOM_SECURITY_ERR;
+ }
+
+ if (upperCaseMethod.EqualsLiteral("DELETE") ||
+ upperCaseMethod.EqualsLiteral("GET") ||
+ upperCaseMethod.EqualsLiteral("HEAD") ||
+ upperCaseMethod.EqualsLiteral("OPTIONS") ||
+ upperCaseMethod.EqualsLiteral("POST") ||
+ upperCaseMethod.EqualsLiteral("PUT")) {
+ outMethod = upperCaseMethod;
+ } else {
+ outMethod = aMethod; // Case unchanged for non-standard methods
+ }
+ return NS_OK;
+}
+
+static bool FindCRLF(nsACString::const_iterator& aStart,
+ nsACString::const_iterator& aEnd) {
+ nsACString::const_iterator end(aEnd);
+ return FindInReadable("\r\n"_ns, aStart, end);
+}
+
+// Reads over a CRLF and positions start after it.
+static bool PushOverLine(nsACString::const_iterator& aStart,
+ const nsACString::const_iterator& aEnd) {
+ if (*aStart == nsCRT::CR && (aEnd - aStart > 1) && *(++aStart) == nsCRT::LF) {
+ ++aStart; // advance to after CRLF
+ return true;
+ }
+
+ return false;
+}
+
+// static
+bool FetchUtil::ExtractHeader(nsACString::const_iterator& aStart,
+ nsACString::const_iterator& aEnd,
+ nsCString& aHeaderName, nsCString& aHeaderValue,
+ bool* aWasEmptyHeader) {
+ MOZ_ASSERT(aWasEmptyHeader);
+ // Set it to a valid value here so we don't forget later.
+ *aWasEmptyHeader = false;
+
+ const char* beginning = aStart.get();
+ nsACString::const_iterator end(aEnd);
+ if (!FindCRLF(aStart, end)) {
+ return false;
+ }
+
+ if (aStart.get() == beginning) {
+ *aWasEmptyHeader = true;
+ return true;
+ }
+
+ nsAutoCString header(beginning, aStart.get() - beginning);
+
+ nsACString::const_iterator headerStart, iter, headerEnd;
+ header.BeginReading(headerStart);
+ header.EndReading(headerEnd);
+ iter = headerStart;
+ if (!FindCharInReadable(':', iter, headerEnd)) {
+ return false;
+ }
+
+ aHeaderName.Assign(StringHead(header, iter - headerStart));
+ aHeaderName.CompressWhitespace();
+ if (!NS_IsValidHTTPToken(aHeaderName)) {
+ return false;
+ }
+
+ aHeaderValue.Assign(Substring(++iter, headerEnd));
+ if (!NS_IsReasonableHTTPHeaderValue(aHeaderValue)) {
+ return false;
+ }
+ aHeaderValue.CompressWhitespace();
+
+ return PushOverLine(aStart, aEnd);
+}
+
+// static
+nsresult FetchUtil::SetRequestReferrer(nsIPrincipal* aPrincipal, Document* aDoc,
+ nsIHttpChannel* aChannel,
+ InternalRequest& aRequest) {
+ MOZ_ASSERT(NS_IsMainThread());
+
+ nsresult rv = NS_OK;
+ nsAutoString referrer;
+ aRequest.GetReferrer(referrer);
+
+ ReferrerPolicy policy = aRequest.ReferrerPolicy_();
+ nsCOMPtr<nsIReferrerInfo> referrerInfo;
+ if (referrer.IsEmpty()) {
+ // This is the case request’s referrer is "no-referrer"
+ referrerInfo = new ReferrerInfo(nullptr, ReferrerPolicy::No_referrer);
+ } else if (referrer.EqualsLiteral(kFETCH_CLIENT_REFERRER_STR)) {
+ referrerInfo = ReferrerInfo::CreateForFetch(aPrincipal, aDoc);
+ // In the first step, we should use referrer info from requetInit
+ referrerInfo = static_cast<ReferrerInfo*>(referrerInfo.get())
+ ->CloneWithNewPolicy(policy);
+ } else {
+ // From "Determine request's Referrer" step 3
+ // "If request's referrer is a URL, let referrerSource be request's
+ // referrer."
+ nsCOMPtr<nsIURI> referrerURI;
+ rv = NS_NewURI(getter_AddRefs(referrerURI), referrer);
+ NS_ENSURE_SUCCESS(rv, rv);
+ referrerInfo = new ReferrerInfo(referrerURI, policy);
+ }
+
+ rv = aChannel->SetReferrerInfoWithoutClone(referrerInfo);
+ NS_ENSURE_SUCCESS(rv, rv);
+
+ nsAutoString computedReferrerSpec;
+ referrerInfo = aChannel->GetReferrerInfo();
+ if (referrerInfo) {
+ Unused << referrerInfo->GetComputedReferrerSpec(computedReferrerSpec);
+ }
+
+ // Step 8 https://fetch.spec.whatwg.org/#main-fetch
+ // If request’s referrer is not "no-referrer", set request’s referrer to
+ // the result of invoking determine request’s referrer.
+ aRequest.SetReferrer(computedReferrerSpec);
+
+ return NS_OK;
+}
+
+class StoreOptimizedEncodingRunnable final : public Runnable {
+ nsMainThreadPtrHandle<nsICacheInfoChannel> mCache;
+ Vector<uint8_t> mBytes;
+
+ public:
+ StoreOptimizedEncodingRunnable(
+ nsMainThreadPtrHandle<nsICacheInfoChannel>&& aCache,
+ Vector<uint8_t>&& aBytes)
+ : Runnable("StoreOptimizedEncodingRunnable"),
+ mCache(std::move(aCache)),
+ mBytes(std::move(aBytes)) {}
+
+ NS_IMETHOD Run() override {
+ nsresult rv;
+
+ nsCOMPtr<nsIAsyncOutputStream> stream;
+ rv = mCache->OpenAlternativeOutputStream(FetchUtil::WasmAltDataType,
+ int64_t(mBytes.length()),
+ getter_AddRefs(stream));
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+
+ auto closeStream = MakeScopeExit([&]() { stream->CloseWithStatus(rv); });
+
+ uint32_t written;
+ rv = stream->Write((char*)mBytes.begin(), mBytes.length(), &written);
+ if (NS_FAILED(rv)) {
+ return rv;
+ }
+
+ MOZ_RELEASE_ASSERT(mBytes.length() == written);
+ return NS_OK;
+ };
+};
+
+class WindowStreamOwner final : public nsIObserver,
+ public nsSupportsWeakReference {
+ // Read from any thread but only set/cleared on the main thread. The lifecycle
+ // of WindowStreamOwner prevents concurrent read/clear.
+ nsCOMPtr<nsIAsyncInputStream> mStream;
+
+ nsCOMPtr<nsIGlobalObject> mGlobal;
+
+ ~WindowStreamOwner() {
+ MOZ_ASSERT(NS_IsMainThread());
+
+ nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
+ if (obs) {
+ obs->RemoveObserver(this, DOM_WINDOW_DESTROYED_TOPIC);
+ }
+ }
+
+ public:
+ NS_DECL_ISUPPORTS
+
+ WindowStreamOwner(nsIAsyncInputStream* aStream, nsIGlobalObject* aGlobal)
+ : mStream(aStream), mGlobal(aGlobal) {
+ MOZ_DIAGNOSTIC_ASSERT(mGlobal);
+ MOZ_ASSERT(NS_IsMainThread());
+ }
+
+ static already_AddRefed<WindowStreamOwner> Create(
+ nsIAsyncInputStream* aStream, nsIGlobalObject* aGlobal) {
+ nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
+ if (NS_WARN_IF(!os)) {
+ return nullptr;
+ }
+
+ RefPtr<WindowStreamOwner> self = new WindowStreamOwner(aStream, aGlobal);
+
+ // Holds nsIWeakReference to self.
+ nsresult rv = os->AddObserver(self, DOM_WINDOW_DESTROYED_TOPIC, true);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ return nullptr;
+ }
+
+ return self.forget();
+ }
+
+ // nsIObserver:
+
+ NS_IMETHOD
+ Observe(nsISupports* aSubject, const char* aTopic,
+ const char16_t* aData) override {
+ MOZ_ASSERT(NS_IsMainThread());
+ MOZ_DIAGNOSTIC_ASSERT(strcmp(aTopic, DOM_WINDOW_DESTROYED_TOPIC) == 0);
+
+ if (!mStream) {
+ return NS_OK;
+ }
+
+ nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(mGlobal);
+ if (!SameCOMIdentity(aSubject, window)) {
+ return NS_OK;
+ }
+
+ // mStream->Close() will call JSStreamConsumer::OnInputStreamReady which may
+ // then destory itself, dropping the last reference to 'this'.
+ RefPtr<WindowStreamOwner> keepAlive(this);
+
+ mStream->Close();
+ mStream = nullptr;
+ mGlobal = nullptr;
+ return NS_OK;
+ }
+};
+
+NS_IMPL_ISUPPORTS(WindowStreamOwner, nsIObserver, nsISupportsWeakReference)
+
+inline nsISupports* ToSupports(WindowStreamOwner* aObj) {
+ return static_cast<nsIObserver*>(aObj);
+}
+
+class WorkerStreamOwner final {
+ public:
+ NS_INLINE_DECL_REFCOUNTING(WorkerStreamOwner)
+
+ explicit WorkerStreamOwner(nsIAsyncInputStream* aStream,
+ nsCOMPtr<nsIEventTarget>&& target)
+ : mStream(aStream), mOwningEventTarget(std::move(target)) {}
+
+ static already_AddRefed<WorkerStreamOwner> Create(
+ nsIAsyncInputStream* aStream, WorkerPrivate* aWorker,
+ nsCOMPtr<nsIEventTarget>&& target) {
+ RefPtr<WorkerStreamOwner> self =
+ new WorkerStreamOwner(aStream, std::move(target));
+
+ self->mWorkerRef =
+ StrongWorkerRef::Create(aWorker, "JSStreamConsumer", [self]() {
+ if (self->mStream) {
+ // If this Close() calls JSStreamConsumer::OnInputStreamReady and
+ // drops the last reference to the JSStreamConsumer, 'this' will not
+ // be destroyed since ~JSStreamConsumer() only enqueues a release
+ // proxy.
+ self->mStream->Close();
+ self->mStream = nullptr;
+ }
+ });
+
+ if (!self->mWorkerRef) {
+ return nullptr;
+ }
+
+ return self.forget();
+ }
+
+ static void ProxyRelease(already_AddRefed<WorkerStreamOwner> aDoomed) {
+ RefPtr<WorkerStreamOwner> doomed = aDoomed;
+ nsIEventTarget* target = doomed->mOwningEventTarget;
+ NS_ProxyRelease("WorkerStreamOwner", target, doomed.forget(),
+ /* aAlwaysProxy = */ true);
+ }
+
+ private:
+ ~WorkerStreamOwner() = default;
+
+ // Read from any thread but only set/cleared on the worker thread. The
+ // lifecycle of WorkerStreamOwner prevents concurrent read/clear.
+ nsCOMPtr<nsIAsyncInputStream> mStream;
+ RefPtr<StrongWorkerRef> mWorkerRef;
+ nsCOMPtr<nsIEventTarget> mOwningEventTarget;
+};
+
+class JSStreamConsumer final : public nsIInputStreamCallback,
+ public JS::OptimizedEncodingListener {
+ // A LengthPrefixType is stored at the start of the compressed optimized
+ // encoding, allowing the decompressed buffer to be allocated to exactly
+ // the right size.
+ using LengthPrefixType = uint32_t;
+ static const unsigned PrefixBytes = sizeof(LengthPrefixType);
+
+ RefPtr<WindowStreamOwner> mWindowStreamOwner;
+ RefPtr<WorkerStreamOwner> mWorkerStreamOwner;
+ nsMainThreadPtrHandle<nsICacheInfoChannel> mCache;
+ const bool mOptimizedEncoding;
+ z_stream mZStream;
+ bool mZStreamInitialized;
+ Vector<uint8_t> mOptimizedEncodingBytes;
+ JS::StreamConsumer* mConsumer;
+ bool mConsumerAborted;
+
+ JSStreamConsumer(already_AddRefed<WindowStreamOwner> aWindowStreamOwner,
+ nsIGlobalObject* aGlobal, JS::StreamConsumer* aConsumer,
+ nsMainThreadPtrHandle<nsICacheInfoChannel>&& aCache,
+ bool aOptimizedEncoding)
+ : mWindowStreamOwner(aWindowStreamOwner),
+ mCache(std::move(aCache)),
+ mOptimizedEncoding(aOptimizedEncoding),
+ mZStreamInitialized(false),
+ mConsumer(aConsumer),
+ mConsumerAborted(false) {
+ MOZ_DIAGNOSTIC_ASSERT(mWindowStreamOwner);
+ MOZ_DIAGNOSTIC_ASSERT(mConsumer);
+ }
+
+ JSStreamConsumer(RefPtr<WorkerStreamOwner> aWorkerStreamOwner,
+ nsIGlobalObject* aGlobal, JS::StreamConsumer* aConsumer,
+ nsMainThreadPtrHandle<nsICacheInfoChannel>&& aCache,
+ bool aOptimizedEncoding)
+ : mWorkerStreamOwner(std::move(aWorkerStreamOwner)),
+ mCache(std::move(aCache)),
+ mOptimizedEncoding(aOptimizedEncoding),
+ mZStreamInitialized(false),
+ mConsumer(aConsumer),
+ mConsumerAborted(false) {
+ MOZ_DIAGNOSTIC_ASSERT(mWorkerStreamOwner);
+ MOZ_DIAGNOSTIC_ASSERT(mConsumer);
+ }
+
+ ~JSStreamConsumer() {
+ if (mZStreamInitialized) {
+ inflateEnd(&mZStream);
+ }
+
+ // Both WindowStreamOwner and WorkerStreamOwner need to be destroyed on
+ // their global's event target thread.
+
+ if (mWindowStreamOwner) {
+ MOZ_DIAGNOSTIC_ASSERT(!mWorkerStreamOwner);
+ NS_ReleaseOnMainThread("JSStreamConsumer::mWindowStreamOwner",
+ mWindowStreamOwner.forget(),
+ /* aAlwaysProxy = */ true);
+ } else {
+ MOZ_DIAGNOSTIC_ASSERT(mWorkerStreamOwner);
+ WorkerStreamOwner::ProxyRelease(mWorkerStreamOwner.forget());
+ }
+
+ // Bug 1733674: these annotations currently do nothing, because they are
+ // member variables and the annotation mechanism only applies to locals. But
+ // the analysis could be extended so that these could replace the big-hammer
+ // ~JSStreamConsumer annotation and thus the analysis could check that
+ // nothing is added that might GC for a different reason.
+ JS_HAZ_VALUE_IS_GC_SAFE(mWindowStreamOwner);
+ JS_HAZ_VALUE_IS_GC_SAFE(mWorkerStreamOwner);
+ }
+
+ static nsresult WriteSegment(nsIInputStream* aStream, void* aClosure,
+ const char* aFromSegment, uint32_t aToOffset,
+ uint32_t aCount, uint32_t* aWriteCount) {
+ JSStreamConsumer* self = reinterpret_cast<JSStreamConsumer*>(aClosure);
+ MOZ_DIAGNOSTIC_ASSERT(!self->mConsumerAborted);
+
+ if (self->mOptimizedEncoding) {
+ if (!self->mZStreamInitialized) {
+ // mOptimizedEncodingBytes is used as temporary storage until we have
+ // the full prefix.
+ MOZ_ASSERT(self->mOptimizedEncodingBytes.length() < PrefixBytes);
+ uint32_t remain = PrefixBytes - self->mOptimizedEncodingBytes.length();
+ uint32_t consume = std::min(remain, aCount);
+
+ if (!self->mOptimizedEncodingBytes.append(aFromSegment, consume)) {
+ return NS_ERROR_UNEXPECTED;
+ }
+
+ if (consume == remain) {
+ // Initialize zlib once all prefix bytes are loaded.
+ LengthPrefixType length;
+ memcpy(&length, self->mOptimizedEncodingBytes.begin(), PrefixBytes);
+
+ if (!self->mOptimizedEncodingBytes.resizeUninitialized(length)) {
+ return NS_ERROR_UNEXPECTED;
+ }
+
+ memset(&self->mZStream, 0, sizeof(self->mZStream));
+ self->mZStream.avail_out = length;
+ self->mZStream.next_out = self->mOptimizedEncodingBytes.begin();
+
+ if (inflateInit(&self->mZStream) != Z_OK) {
+ return NS_ERROR_UNEXPECTED;
+ }
+ self->mZStreamInitialized = true;
+ }
+
+ *aWriteCount = consume;
+ return NS_OK;
+ }
+
+ // Zlib is initialized, overwrite the prefix with the inflated data.
+
+ MOZ_DIAGNOSTIC_ASSERT(aCount > 0);
+ self->mZStream.avail_in = aCount;
+ self->mZStream.next_in = (uint8_t*)aFromSegment;
+
+ int ret = inflate(&self->mZStream, Z_NO_FLUSH);
+
+ MOZ_DIAGNOSTIC_ASSERT(ret == Z_OK || ret == Z_STREAM_END,
+ "corrupt optimized wasm cache file: data");
+ MOZ_DIAGNOSTIC_ASSERT(self->mZStream.avail_in == 0,
+ "corrupt optimized wasm cache file: input");
+ MOZ_DIAGNOSTIC_ASSERT_IF(ret == Z_STREAM_END,
+ self->mZStream.avail_out == 0);
+ // Gracefully handle corruption in release.
+ bool ok =
+ (ret == Z_OK || ret == Z_STREAM_END) && self->mZStream.avail_in == 0;
+ if (!ok) {
+ return NS_ERROR_UNEXPECTED;
+ }
+ } else {
+ // This callback can be called on any thread which is explicitly allowed
+ // by this particular JS API call.
+ if (!self->mConsumer->consumeChunk((const uint8_t*)aFromSegment,
+ aCount)) {
+ self->mConsumerAborted = true;
+ return NS_ERROR_UNEXPECTED;
+ }
+ }
+
+ *aWriteCount = aCount;
+ return NS_OK;
+ }
+
+ public:
+ NS_DECL_THREADSAFE_ISUPPORTS
+
+ static bool Start(nsCOMPtr<nsIInputStream> aStream, nsIGlobalObject* aGlobal,
+ WorkerPrivate* aMaybeWorker, JS::StreamConsumer* aConsumer,
+ nsMainThreadPtrHandle<nsICacheInfoChannel>&& aCache,
+ bool aOptimizedEncoding) {
+ nsCOMPtr<nsIAsyncInputStream> asyncStream;
+ nsresult rv = NS_MakeAsyncNonBlockingInputStream(
+ aStream.forget(), getter_AddRefs(asyncStream));
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ return false;
+ }
+
+ RefPtr<JSStreamConsumer> consumer;
+ if (aMaybeWorker) {
+ RefPtr<WorkerStreamOwner> owner = WorkerStreamOwner::Create(
+ asyncStream, aMaybeWorker,
+ aGlobal->EventTargetFor(TaskCategory::Other));
+ if (!owner) {
+ return false;
+ }
+
+ consumer = new JSStreamConsumer(std::move(owner), aGlobal, aConsumer,
+ std::move(aCache), aOptimizedEncoding);
+ } else {
+ RefPtr<WindowStreamOwner> owner =
+ WindowStreamOwner::Create(asyncStream, aGlobal);
+ if (!owner) {
+ return false;
+ }
+
+ consumer = new JSStreamConsumer(owner.forget(), aGlobal, aConsumer,
+ std::move(aCache), aOptimizedEncoding);
+ }
+
+ // This AsyncWait() creates a ref-cycle between asyncStream and consumer:
+ //
+ // asyncStream -> consumer -> (Window|Worker)StreamOwner -> asyncStream
+ //
+ // The cycle is broken when the stream completes or errors out and
+ // asyncStream drops its reference to consumer.
+ return NS_SUCCEEDED(asyncStream->AsyncWait(consumer, 0, 0, nullptr));
+ }
+
+ // nsIInputStreamCallback:
+
+ NS_IMETHOD
+ OnInputStreamReady(nsIAsyncInputStream* aStream) override {
+ // Can be called on any stream. The JS API calls made below explicitly
+ // support being called from any thread.
+ MOZ_DIAGNOSTIC_ASSERT(!mConsumerAborted);
+
+ nsresult rv;
+
+ uint64_t available = 0;
+ rv = aStream->Available(&available);
+ if (NS_SUCCEEDED(rv) && available == 0) {
+ rv = NS_BASE_STREAM_CLOSED;
+ }
+
+ if (rv == NS_BASE_STREAM_CLOSED) {
+ if (mOptimizedEncoding) {
+ // Gracefully handle corruption of compressed data stream in release.
+ // From on investigations in bug 1738987, the incomplete data cases
+ // mostly happen during shutdown. Some corruptions in the cache entry
+ // can still happen and will be handled in the WriteSegment above.
+ bool ok = mZStreamInitialized && mZStream.avail_out == 0;
+ if (!ok) {
+ mConsumer->streamError(size_t(NS_ERROR_UNEXPECTED));
+ return NS_OK;
+ }
+
+ mConsumer->consumeOptimizedEncoding(mOptimizedEncodingBytes.begin(),
+ mOptimizedEncodingBytes.length());
+ } else {
+ // If there is cache entry associated with this stream, then listen for
+ // an optimized encoding so we can store it in the alt data. By JS API
+ // contract, the compilation process will hold a refcount to 'this'
+ // until it's done, optionally calling storeOptimizedEncoding().
+ mConsumer->streamEnd(mCache ? this : nullptr);
+ }
+ return NS_OK;
+ }
+
+ if (NS_FAILED(rv)) {
+ mConsumer->streamError(size_t(rv));
+ return NS_OK;
+ }
+
+ // Check mConsumerAborted before NS_FAILED to avoid calling streamError()
+ // if consumeChunk() returned false per JS API contract.
+ uint32_t written = 0;
+ rv = aStream->ReadSegments(WriteSegment, this, available, &written);
+ if (mConsumerAborted) {
+ return NS_OK;
+ }
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ mConsumer->streamError(size_t(rv));
+ return NS_OK;
+ }
+
+ rv = aStream->AsyncWait(this, 0, 0, nullptr);
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ mConsumer->streamError(size_t(rv));
+ return NS_OK;
+ }
+
+ return NS_OK;
+ }
+
+ // JS::OptimizedEncodingListener
+
+ void storeOptimizedEncoding(const uint8_t* aSrcBytes,
+ size_t aSrcLength) override {
+ MOZ_ASSERT(mCache, "we only listen if there's a cache entry");
+
+ z_stream zstream;
+ memset(&zstream, 0, sizeof(zstream));
+ zstream.avail_in = aSrcLength;
+ zstream.next_in = (uint8_t*)aSrcBytes;
+
+ // The wins from increasing compression levels are tiny, while the time
+ // to compress increases drastically. For example, for a 148mb alt-data
+ // produced by a 40mb .wasm file, the level 2 takes 2.5s to get a 3.7x size
+ // reduction while level 9 takes 22.5s to get a 4x size reduction. Read-time
+ // wins from smaller compressed cache files are not found to be
+ // significant, thus the fastest compression level is used. (On test
+ // workloads, level 2 actually was faster *and* smaller than level 1.)
+ const int COMPRESSION = 2;
+ if (deflateInit(&zstream, COMPRESSION) != Z_OK) {
+ return;
+ }
+ auto autoDestroy = MakeScopeExit([&]() { deflateEnd(&zstream); });
+
+ Vector<uint8_t> dstBytes;
+ if (!dstBytes.resizeUninitialized(PrefixBytes +
+ deflateBound(&zstream, aSrcLength))) {
+ return;
+ }
+
+ MOZ_RELEASE_ASSERT(LengthPrefixType(aSrcLength) == aSrcLength);
+ LengthPrefixType srcLength = aSrcLength;
+ memcpy(dstBytes.begin(), &srcLength, PrefixBytes);
+
+ uint8_t* compressBegin = dstBytes.begin() + PrefixBytes;
+ zstream.next_out = compressBegin;
+ zstream.avail_out = dstBytes.length() - PrefixBytes;
+
+ int ret = deflate(&zstream, Z_FINISH);
+ if (ret == Z_MEM_ERROR) {
+ return;
+ }
+ MOZ_RELEASE_ASSERT(ret == Z_STREAM_END);
+
+ dstBytes.shrinkTo(zstream.next_out - dstBytes.begin());
+
+ NS_DispatchToMainThread(new StoreOptimizedEncodingRunnable(
+ std::move(mCache), std::move(dstBytes)));
+ }
+};
+
+NS_IMPL_ISUPPORTS(JSStreamConsumer, nsIInputStreamCallback)
+
+// static
+const nsCString FetchUtil::WasmAltDataType;
+
+// static
+void FetchUtil::InitWasmAltDataType() {
+ nsCString& type = const_cast<nsCString&>(WasmAltDataType);
+ MOZ_ASSERT(type.IsEmpty());
+
+ RunOnShutdown([]() {
+ // Avoid nsStringBuffer leak tests failures.
+ const_cast<nsCString&>(WasmAltDataType).Truncate();
+ });
+
+ type.Append(nsLiteralCString("wasm-"));
+
+ JS::BuildIdCharVector buildId;
+ if (!JS::GetOptimizedEncodingBuildId(&buildId)) {
+ MOZ_CRASH("build id oom");
+ }
+
+ type.Append(buildId.begin(), buildId.length());
+}
+
+static bool ThrowException(JSContext* aCx, unsigned errorNumber) {
+ JS_ReportErrorNumberASCII(aCx, js::GetErrorMessage, nullptr, errorNumber);
+ return false;
+}
+
+// static
+bool FetchUtil::StreamResponseToJS(JSContext* aCx, JS::Handle<JSObject*> aObj,
+ JS::MimeType aMimeType,
+ JS::StreamConsumer* aConsumer,
+ WorkerPrivate* aMaybeWorker) {
+ MOZ_ASSERT(!WasmAltDataType.IsEmpty());
+ MOZ_ASSERT(!aMaybeWorker == NS_IsMainThread());
+
+ RefPtr<Response> response;
+ nsresult rv = UNWRAP_OBJECT(Response, aObj, response);
+ if (NS_FAILED(rv)) {
+ return ThrowException(aCx, JSMSG_WASM_BAD_RESPONSE_VALUE);
+ }
+
+ const char* requiredMimeType = nullptr;
+ switch (aMimeType) {
+ case JS::MimeType::Wasm:
+ requiredMimeType = WASM_CONTENT_TYPE;
+ break;
+ }
+
+ nsAutoCString mimeType;
+ nsAutoCString mixedCaseMimeType; // unused
+ response->GetMimeType(mimeType, mixedCaseMimeType);
+
+ if (!mimeType.EqualsASCII(requiredMimeType)) {
+ JS_ReportErrorNumberASCII(aCx, js::GetErrorMessage, nullptr,
+ JSMSG_WASM_BAD_RESPONSE_MIME_TYPE, mimeType.get(),
+ requiredMimeType);
+ return false;
+ }
+
+ if (response->Type() != ResponseType::Basic &&
+ response->Type() != ResponseType::Cors &&
+ response->Type() != ResponseType::Default) {
+ return ThrowException(aCx, JSMSG_WASM_BAD_RESPONSE_CORS_SAME_ORIGIN);
+ }
+
+ if (!response->Ok()) {
+ return ThrowException(aCx, JSMSG_WASM_BAD_RESPONSE_STATUS);
+ }
+
+ if (response->BodyUsed()) {
+ return ThrowException(aCx, JSMSG_WASM_RESPONSE_ALREADY_CONSUMED);
+ }
+
+ switch (aMimeType) {
+ case JS::MimeType::Wasm:
+ nsAutoString url;
+ response->GetUrl(url);
+
+ IgnoredErrorResult result;
+ nsCString sourceMapUrl;
+ response->GetInternalHeaders()->Get("SourceMap"_ns, sourceMapUrl, result);
+ if (NS_WARN_IF(result.Failed())) {
+ return ThrowException(aCx, JSMSG_WASM_ERROR_CONSUMING_RESPONSE);
+ }
+ NS_ConvertUTF16toUTF8 urlUTF8(url);
+ aConsumer->noteResponseURLs(
+ urlUTF8.get(), sourceMapUrl.IsVoid() ? nullptr : sourceMapUrl.get());
+ break;
+ }
+
+ SafeRefPtr<InternalResponse> ir = response->GetInternalResponse();
+ if (NS_WARN_IF(!ir)) {
+ return ThrowException(aCx, JSMSG_OUT_OF_MEMORY);
+ }
+
+ nsCOMPtr<nsIInputStream> stream;
+
+ nsMainThreadPtrHandle<nsICacheInfoChannel> cache;
+ bool optimizedEncoding = false;
+ if (ir->HasCacheInfoChannel()) {
+ cache = ir->TakeCacheInfoChannel();
+
+ nsAutoCString altDataType;
+ if (NS_SUCCEEDED(cache->GetAlternativeDataType(altDataType)) &&
+ WasmAltDataType.Equals(altDataType)) {
+ optimizedEncoding = true;
+ rv = cache->GetAlternativeDataInputStream(getter_AddRefs(stream));
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ return ThrowException(aCx, JSMSG_OUT_OF_MEMORY);
+ }
+ if (ir->HasBeenCloned()) {
+ // If `Response` is cloned, clone alternative data stream instance.
+ // The cache entry does not clone automatically, and multiple
+ // JSStreamConsumer instances will collide during read if not cloned.
+ nsCOMPtr<nsICloneableInputStream> original = do_QueryInterface(stream);
+ if (NS_WARN_IF(!original)) {
+ return ThrowException(aCx, JSMSG_OUT_OF_MEMORY);
+ }
+ rv = original->Clone(getter_AddRefs(stream));
+ if (NS_WARN_IF(NS_FAILED(rv))) {
+ return ThrowException(aCx, JSMSG_OUT_OF_MEMORY);
+ }
+ }
+ }
+ }
+
+ if (!optimizedEncoding) {
+ ir->GetUnfilteredBody(getter_AddRefs(stream));
+ if (!stream) {
+ aConsumer->streamEnd();
+ return true;
+ }
+ }
+
+ MOZ_ASSERT(stream);
+
+ IgnoredErrorResult error;
+ response->SetBodyUsed(aCx, error);
+ if (NS_WARN_IF(error.Failed())) {
+ return ThrowException(aCx, JSMSG_WASM_ERROR_CONSUMING_RESPONSE);
+ }
+
+ nsIGlobalObject* global = xpc::NativeGlobal(js::UncheckedUnwrap(aObj));
+
+ if (!JSStreamConsumer::Start(stream, global, aMaybeWorker, aConsumer,
+ std::move(cache), optimizedEncoding)) {
+ return ThrowException(aCx, JSMSG_OUT_OF_MEMORY);
+ }
+
+ return true;
+}
+
+// static
+void FetchUtil::ReportJSStreamError(JSContext* aCx, size_t aErrorCode) {
+ // For now, convert *all* errors into AbortError.
+
+ RefPtr<DOMException> e = DOMException::Create(NS_ERROR_DOM_ABORT_ERR);
+
+ JS::Rooted<JS::Value> value(aCx);
+ if (!GetOrCreateDOMReflector(aCx, e, &value)) {
+ return;
+ }
+
+ JS_SetPendingException(aCx, value);
+}
+
+} // namespace mozilla::dom