forked from mirrors/gecko-dev
3fb6fb25a2
MozReview-Commit-ID: FoSVrK9PT3s --HG-- extra : rebase_source : 5ce2721bb02d4277008ee97ac4e102f6301ac198
3040 lines
96 KiB
C++
3040 lines
96 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* A class that handles loading and evaluation of <script> elements.
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*/
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#include "nsScriptLoader.h"
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#include "prsystem.h"
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#include "jsapi.h"
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#include "jsfriendapi.h"
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#include "xpcpublic.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsIContent.h"
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#include "nsJSUtils.h"
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#include "mozilla/dom/ScriptSettings.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/SRILogHelper.h"
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#include "nsGkAtoms.h"
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#include "nsNetUtil.h"
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#include "nsIScriptGlobalObject.h"
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#include "nsIScriptContext.h"
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#include "nsIScriptSecurityManager.h"
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#include "nsIPrincipal.h"
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#include "nsJSPrincipals.h"
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#include "nsContentPolicyUtils.h"
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#include "nsIHttpChannel.h"
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#include "nsIHttpChannelInternal.h"
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#include "nsIClassOfService.h"
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#include "nsITimedChannel.h"
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#include "nsIScriptElement.h"
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#include "nsIDOMHTMLScriptElement.h"
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#include "nsIDocShell.h"
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#include "nsContentUtils.h"
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#include "nsUnicharUtils.h"
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#include "nsAutoPtr.h"
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#include "nsIXPConnect.h"
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#include "nsError.h"
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#include "nsThreadUtils.h"
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#include "nsDocShellCID.h"
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#include "nsIContentSecurityPolicy.h"
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#include "mozilla/Logging.h"
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#include "nsCRT.h"
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#include "nsContentCreatorFunctions.h"
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#include "nsProxyRelease.h"
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#include "nsSandboxFlags.h"
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#include "nsContentTypeParser.h"
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#include "nsINetworkPredictor.h"
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#include "ImportManager.h"
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#include "mozilla/dom/EncodingUtils.h"
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#include "mozilla/ConsoleReportCollector.h"
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#include "mozilla/Attributes.h"
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#include "mozilla/Unused.h"
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#include "nsIScriptError.h"
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using namespace mozilla;
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using namespace mozilla::dom;
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using JS::SourceBufferHolder;
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static LazyLogModule gCspPRLog("CSP");
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void
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ImplCycleCollectionUnlink(nsScriptLoadRequestList& aField);
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void
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ImplCycleCollectionTraverse(nsCycleCollectionTraversalCallback& aCallback,
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nsScriptLoadRequestList& aField,
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const char* aName,
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uint32_t aFlags = 0);
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//////////////////////////////////////////////////////////////
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// nsScriptLoadRequest
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//////////////////////////////////////////////////////////////
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsScriptLoadRequest)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTION_0(nsScriptLoadRequest)
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NS_IMPL_CYCLE_COLLECTING_ADDREF(nsScriptLoadRequest)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(nsScriptLoadRequest)
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nsScriptLoadRequest::~nsScriptLoadRequest()
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{
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js_free(mScriptTextBuf);
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// We should always clean up any off-thread script parsing resources.
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MOZ_ASSERT(!mOffThreadToken);
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// But play it safe in release builds and try to clean them up here
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// as a fail safe.
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MaybeCancelOffThreadScript();
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}
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void
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nsScriptLoadRequest::SetReady()
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{
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MOZ_ASSERT(mProgress != Progress::Ready);
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mProgress = Progress::Ready;
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}
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void
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nsScriptLoadRequest::Cancel()
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{
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MaybeCancelOffThreadScript();
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mIsCanceled = true;
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}
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void
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nsScriptLoadRequest::MaybeCancelOffThreadScript()
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{
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MOZ_ASSERT(NS_IsMainThread());
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if (!mOffThreadToken) {
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return;
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}
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JSContext* cx = danger::GetJSContext();
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JS::CancelOffThreadScript(cx, mOffThreadToken);
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mOffThreadToken = nullptr;
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}
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//////////////////////////////////////////////////////////////
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// nsModuleLoadRequest
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//////////////////////////////////////////////////////////////
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// A load request for a module, created for every top level module script and
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// every module import. Load request can share an nsModuleScript if there are
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// multiple imports of the same module.
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class nsModuleLoadRequest final : public nsScriptLoadRequest
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{
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~nsModuleLoadRequest() {}
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nsModuleLoadRequest(const nsModuleLoadRequest& aOther) = delete;
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nsModuleLoadRequest(nsModuleLoadRequest&& aOther) = delete;
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public:
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(nsModuleLoadRequest, nsScriptLoadRequest)
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nsModuleLoadRequest(nsIScriptElement* aElement,
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uint32_t aVersion,
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CORSMode aCORSMode,
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const SRIMetadata& aIntegrity,
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nsScriptLoader* aLoader);
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bool IsTopLevel() const {
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return mIsTopLevel;
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}
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void SetReady() override;
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void Cancel() override;
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void ModuleLoaded();
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void DependenciesLoaded();
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void LoadFailed();
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// Is this a request for a top level module script or an import?
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bool mIsTopLevel;
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// The base URL used for resolving relative module imports.
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nsCOMPtr<nsIURI> mBaseURL;
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// Pointer to the script loader, used to trigger actions when the module load
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// finishes.
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RefPtr<nsScriptLoader> mLoader;
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// The importing module, or nullptr for top level module scripts. Used to
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// implement the ancestor list checked when fetching module dependencies.
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RefPtr<nsModuleLoadRequest> mParent;
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// Set to a module script object after a successful load or nullptr on
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// failure.
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RefPtr<nsModuleScript> mModuleScript;
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// A promise that is completed on successful load of this module and all of
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// its dependencies, indicating that the module is ready for instantiation and
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// evaluation.
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MozPromiseHolder<GenericPromise> mReady;
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// Array of imported modules.
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nsTArray<RefPtr<nsModuleLoadRequest>> mImports;
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};
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(nsModuleLoadRequest)
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NS_INTERFACE_MAP_END_INHERITING(nsScriptLoadRequest)
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NS_IMPL_CYCLE_COLLECTION_INHERITED(nsModuleLoadRequest, nsScriptLoadRequest,
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mBaseURL,
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mLoader,
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mParent,
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mModuleScript,
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mImports)
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NS_IMPL_ADDREF_INHERITED(nsModuleLoadRequest, nsScriptLoadRequest)
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NS_IMPL_RELEASE_INHERITED(nsModuleLoadRequest, nsScriptLoadRequest)
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nsModuleLoadRequest::nsModuleLoadRequest(nsIScriptElement* aElement,
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uint32_t aVersion,
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CORSMode aCORSMode,
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const SRIMetadata &aIntegrity,
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nsScriptLoader* aLoader)
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: nsScriptLoadRequest(nsScriptKind::Module,
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aElement,
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aVersion,
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aCORSMode,
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aIntegrity),
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mIsTopLevel(true),
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mLoader(aLoader)
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{}
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inline nsModuleLoadRequest*
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nsScriptLoadRequest::AsModuleRequest()
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{
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MOZ_ASSERT(IsModuleRequest());
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return static_cast<nsModuleLoadRequest*>(this);
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}
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void nsModuleLoadRequest::Cancel()
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{
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nsScriptLoadRequest::Cancel();
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mModuleScript = nullptr;
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mProgress = nsScriptLoadRequest::Progress::Ready;
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for (size_t i = 0; i < mImports.Length(); i++) {
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mImports[i]->Cancel();
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}
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mReady.RejectIfExists(NS_ERROR_FAILURE, __func__);
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}
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void
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nsModuleLoadRequest::SetReady()
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{
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#ifdef DEBUG
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for (size_t i = 0; i < mImports.Length(); i++) {
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MOZ_ASSERT(mImports[i]->IsReadyToRun());
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}
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#endif
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nsScriptLoadRequest::SetReady();
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mReady.ResolveIfExists(true, __func__);
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}
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void
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nsModuleLoadRequest::ModuleLoaded()
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{
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// A module that was found to be marked as fetching in the module map has now
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// been loaded.
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mModuleScript = mLoader->GetFetchedModule(mURI);
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mLoader->StartFetchingModuleDependencies(this);
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}
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void
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nsModuleLoadRequest::DependenciesLoaded()
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{
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// The module and all of its dependencies have been successfully fetched and
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// compiled.
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if (!mLoader->InstantiateModuleTree(this)) {
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LoadFailed();
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return;
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}
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SetReady();
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mLoader->ProcessLoadedModuleTree(this);
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mLoader = nullptr;
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mParent = nullptr;
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}
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void
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nsModuleLoadRequest::LoadFailed()
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{
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Cancel();
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mLoader->ProcessLoadedModuleTree(this);
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mLoader = nullptr;
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mParent = nullptr;
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}
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//////////////////////////////////////////////////////////////
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// nsModuleScript
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//////////////////////////////////////////////////////////////
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// A single module script. May be used to satisfy multiple load requests.
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class nsModuleScript final : public nsISupports
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{
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enum InstantiationState {
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Uninstantiated,
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Instantiated,
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Errored
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};
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RefPtr<nsScriptLoader> mLoader;
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nsCOMPtr<nsIURI> mBaseURL;
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JS::Heap<JSObject*> mModuleRecord;
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JS::Heap<JS::Value> mException;
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InstantiationState mInstantiationState;
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~nsModuleScript();
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public:
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(nsModuleScript)
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nsModuleScript(nsScriptLoader* aLoader,
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nsIURI* aBaseURL,
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JS::Handle<JSObject*> aModuleRecord);
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nsScriptLoader* Loader() const { return mLoader; }
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JSObject* ModuleRecord() const
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{
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if (mModuleRecord) {
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JS::ExposeObjectToActiveJS(mModuleRecord);
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}
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return mModuleRecord;
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}
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JS::Value Exception() const
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{
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JS::ExposeValueToActiveJS(mException);
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return mException;
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}
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nsIURI* BaseURL() const { return mBaseURL; }
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void SetInstantiationResult(JS::Handle<JS::Value> aMaybeException);
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bool IsUninstantiated() const {
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return mInstantiationState == Uninstantiated;
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}
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bool IsInstantiated() const {
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return mInstantiationState == Instantiated;
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}
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bool InstantiationFailed() const {
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return mInstantiationState == Errored;
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}
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void UnlinkModuleRecord();
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};
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsModuleScript)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTION_CLASS(nsModuleScript)
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NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsModuleScript)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mLoader)
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NS_IMPL_CYCLE_COLLECTION_UNLINK(mBaseURL)
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tmp->UnlinkModuleRecord();
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NS_IMPL_CYCLE_COLLECTION_UNLINK_END
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsModuleScript)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mLoader)
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_SCRIPT_OBJECTS
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NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
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NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN(nsModuleScript)
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NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mModuleRecord)
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NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mException)
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NS_IMPL_CYCLE_COLLECTION_TRACE_END
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NS_IMPL_CYCLE_COLLECTING_ADDREF(nsModuleScript)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(nsModuleScript)
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nsModuleScript::nsModuleScript(nsScriptLoader *aLoader, nsIURI* aBaseURL,
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JS::Handle<JSObject*> aModuleRecord)
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: mLoader(aLoader),
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mBaseURL(aBaseURL),
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mModuleRecord(aModuleRecord),
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mInstantiationState(Uninstantiated)
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{
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MOZ_ASSERT(mLoader);
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MOZ_ASSERT(mBaseURL);
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MOZ_ASSERT(mModuleRecord);
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MOZ_ASSERT(mException.isUndefined());
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// Make module's host defined field point to this module script object.
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// This is cleared in the UnlinkModuleRecord().
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JS::SetModuleHostDefinedField(mModuleRecord, JS::PrivateValue(this));
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HoldJSObjects(this);
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}
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void
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nsModuleScript::UnlinkModuleRecord()
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{
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// Remove module's back reference to this object request if present.
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if (mModuleRecord) {
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MOZ_ASSERT(JS::GetModuleHostDefinedField(mModuleRecord).toPrivate() ==
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this);
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JS::SetModuleHostDefinedField(mModuleRecord, JS::UndefinedValue());
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}
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mModuleRecord = nullptr;
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mException.setUndefined();
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}
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nsModuleScript::~nsModuleScript()
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{
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if (mModuleRecord) {
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// The object may be destroyed without being unlinked first.
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UnlinkModuleRecord();
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}
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DropJSObjects(this);
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}
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void
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nsModuleScript::SetInstantiationResult(JS::Handle<JS::Value> aMaybeException)
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{
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MOZ_ASSERT(mInstantiationState == Uninstantiated);
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MOZ_ASSERT(mModuleRecord);
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MOZ_ASSERT(mException.isUndefined());
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if (aMaybeException.isUndefined()) {
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mInstantiationState = Instantiated;
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} else {
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mModuleRecord = nullptr;
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mException = aMaybeException;
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mInstantiationState = Errored;
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}
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}
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//////////////////////////////////////////////////////////////
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// nsScriptLoadRequestList
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//////////////////////////////////////////////////////////////
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nsScriptLoadRequestList::~nsScriptLoadRequestList()
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{
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Clear();
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}
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void
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nsScriptLoadRequestList::Clear()
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{
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while (!isEmpty()) {
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RefPtr<nsScriptLoadRequest> first = StealFirst();
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first->Cancel();
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// And just let it go out of scope and die.
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}
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}
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#ifdef DEBUG
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bool
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nsScriptLoadRequestList::Contains(nsScriptLoadRequest* aElem) const
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{
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for (const nsScriptLoadRequest* req = getFirst();
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req; req = req->getNext()) {
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if (req == aElem) {
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return true;
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}
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}
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return false;
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}
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#endif // DEBUG
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inline void
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ImplCycleCollectionUnlink(nsScriptLoadRequestList& aField)
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{
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while (!aField.isEmpty()) {
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RefPtr<nsScriptLoadRequest> first = aField.StealFirst();
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}
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}
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inline void
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ImplCycleCollectionTraverse(nsCycleCollectionTraversalCallback& aCallback,
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nsScriptLoadRequestList& aField,
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const char* aName,
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uint32_t aFlags)
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{
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for (nsScriptLoadRequest* request = aField.getFirst();
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request; request = request->getNext())
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{
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CycleCollectionNoteChild(aCallback, request, aName, aFlags);
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}
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}
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//////////////////////////////////////////////////////////////
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// nsScriptLoader::PreloadInfo
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//////////////////////////////////////////////////////////////
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inline void
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ImplCycleCollectionUnlink(nsScriptLoader::PreloadInfo& aField)
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{
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ImplCycleCollectionUnlink(aField.mRequest);
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}
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inline void
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ImplCycleCollectionTraverse(nsCycleCollectionTraversalCallback& aCallback,
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nsScriptLoader::PreloadInfo& aField,
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const char* aName,
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uint32_t aFlags = 0)
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{
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ImplCycleCollectionTraverse(aCallback, aField.mRequest, aName, aFlags);
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}
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//////////////////////////////////////////////////////////////
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// nsScriptLoader
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//////////////////////////////////////////////////////////////
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsScriptLoader)
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NS_INTERFACE_MAP_END
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NS_IMPL_CYCLE_COLLECTION(nsScriptLoader,
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mNonAsyncExternalScriptInsertedRequests,
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mLoadingAsyncRequests,
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mLoadedAsyncRequests,
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mDeferRequests,
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mXSLTRequests,
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mParserBlockingRequest,
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mPreloads,
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mPendingChildLoaders,
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mFetchedModules)
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NS_IMPL_CYCLE_COLLECTING_ADDREF(nsScriptLoader)
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NS_IMPL_CYCLE_COLLECTING_RELEASE(nsScriptLoader)
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nsScriptLoader::nsScriptLoader(nsIDocument *aDocument)
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: mDocument(aDocument),
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mParserBlockingBlockerCount(0),
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mBlockerCount(0),
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mNumberOfProcessors(0),
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mEnabled(true),
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mDeferEnabled(false),
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mDocumentParsingDone(false),
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mBlockingDOMContentLoaded(false),
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mReporter(new ConsoleReportCollector())
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{
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}
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nsScriptLoader::~nsScriptLoader()
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{
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mObservers.Clear();
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if (mParserBlockingRequest) {
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mParserBlockingRequest->FireScriptAvailable(NS_ERROR_ABORT);
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}
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for (nsScriptLoadRequest* req = mXSLTRequests.getFirst(); req;
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req = req->getNext()) {
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req->FireScriptAvailable(NS_ERROR_ABORT);
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}
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for (nsScriptLoadRequest* req = mDeferRequests.getFirst(); req;
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req = req->getNext()) {
|
|
req->FireScriptAvailable(NS_ERROR_ABORT);
|
|
}
|
|
|
|
for (nsScriptLoadRequest* req = mLoadingAsyncRequests.getFirst(); req;
|
|
req = req->getNext()) {
|
|
req->FireScriptAvailable(NS_ERROR_ABORT);
|
|
}
|
|
|
|
for (nsScriptLoadRequest* req = mLoadedAsyncRequests.getFirst(); req;
|
|
req = req->getNext()) {
|
|
req->FireScriptAvailable(NS_ERROR_ABORT);
|
|
}
|
|
|
|
for(nsScriptLoadRequest* req = mNonAsyncExternalScriptInsertedRequests.getFirst();
|
|
req;
|
|
req = req->getNext()) {
|
|
req->FireScriptAvailable(NS_ERROR_ABORT);
|
|
}
|
|
|
|
// Unblock the kids, in case any of them moved to a different document
|
|
// subtree in the meantime and therefore aren't actually going away.
|
|
for (uint32_t j = 0; j < mPendingChildLoaders.Length(); ++j) {
|
|
mPendingChildLoaders[j]->RemoveParserBlockingScriptExecutionBlocker();
|
|
}
|
|
}
|
|
|
|
// Helper method for checking if the script element is an event-handler
|
|
// This means that it has both a for-attribute and a event-attribute.
|
|
// Also, if the for-attribute has a value that matches "\s*window\s*",
|
|
// and the event-attribute matches "\s*onload([ \(].*)?" then it isn't an
|
|
// eventhandler. (both matches are case insensitive).
|
|
// This is how IE seems to filter out a window's onload handler from a
|
|
// <script for=... event=...> element.
|
|
|
|
static bool
|
|
IsScriptEventHandler(nsIContent* aScriptElement)
|
|
{
|
|
if (!aScriptElement->IsHTMLElement()) {
|
|
return false;
|
|
}
|
|
|
|
nsAutoString forAttr, eventAttr;
|
|
if (!aScriptElement->GetAttr(kNameSpaceID_None, nsGkAtoms::_for, forAttr) ||
|
|
!aScriptElement->GetAttr(kNameSpaceID_None, nsGkAtoms::event, eventAttr)) {
|
|
return false;
|
|
}
|
|
|
|
const nsAString& for_str =
|
|
nsContentUtils::TrimWhitespace<nsCRT::IsAsciiSpace>(forAttr);
|
|
if (!for_str.LowerCaseEqualsLiteral("window")) {
|
|
return true;
|
|
}
|
|
|
|
// We found for="window", now check for event="onload".
|
|
const nsAString& event_str =
|
|
nsContentUtils::TrimWhitespace<nsCRT::IsAsciiSpace>(eventAttr, false);
|
|
if (!StringBeginsWith(event_str, NS_LITERAL_STRING("onload"),
|
|
nsCaseInsensitiveStringComparator())) {
|
|
// It ain't "onload.*".
|
|
|
|
return true;
|
|
}
|
|
|
|
nsAutoString::const_iterator start, end;
|
|
event_str.BeginReading(start);
|
|
event_str.EndReading(end);
|
|
|
|
start.advance(6); // advance past "onload"
|
|
|
|
if (start != end && *start != '(' && *start != ' ') {
|
|
// We got onload followed by something other than space or
|
|
// '('. Not good enough.
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
nsresult
|
|
nsScriptLoader::CheckContentPolicy(nsIDocument* aDocument,
|
|
nsISupports *aContext,
|
|
nsIURI *aURI,
|
|
const nsAString &aType,
|
|
bool aIsPreLoad)
|
|
{
|
|
nsContentPolicyType contentPolicyType = aIsPreLoad
|
|
? nsIContentPolicy::TYPE_INTERNAL_SCRIPT_PRELOAD
|
|
: nsIContentPolicy::TYPE_INTERNAL_SCRIPT;
|
|
|
|
int16_t shouldLoad = nsIContentPolicy::ACCEPT;
|
|
nsresult rv = NS_CheckContentLoadPolicy(contentPolicyType,
|
|
aURI,
|
|
aDocument->NodePrincipal(),
|
|
aContext,
|
|
NS_LossyConvertUTF16toASCII(aType),
|
|
nullptr, //extra
|
|
&shouldLoad,
|
|
nsContentUtils::GetContentPolicy(),
|
|
nsContentUtils::GetSecurityManager());
|
|
if (NS_FAILED(rv) || NS_CP_REJECTED(shouldLoad)) {
|
|
if (NS_FAILED(rv) || shouldLoad != nsIContentPolicy::REJECT_TYPE) {
|
|
return NS_ERROR_CONTENT_BLOCKED;
|
|
}
|
|
return NS_ERROR_CONTENT_BLOCKED_SHOW_ALT;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
bool
|
|
nsScriptLoader::ModuleMapContainsModule(nsModuleLoadRequest *aRequest) const
|
|
{
|
|
// Returns whether we have fetched, or are currently fetching, a module script
|
|
// for the request's URL.
|
|
return mFetchingModules.Contains(aRequest->mURI) ||
|
|
mFetchedModules.Contains(aRequest->mURI);
|
|
}
|
|
|
|
bool
|
|
nsScriptLoader::IsFetchingModule(nsModuleLoadRequest *aRequest) const
|
|
{
|
|
bool fetching = mFetchingModules.Contains(aRequest->mURI);
|
|
MOZ_ASSERT_IF(fetching, !mFetchedModules.Contains(aRequest->mURI));
|
|
return fetching;
|
|
}
|
|
|
|
void
|
|
nsScriptLoader::SetModuleFetchStarted(nsModuleLoadRequest *aRequest)
|
|
{
|
|
// Update the module map to indicate that a module is currently being fetched.
|
|
|
|
MOZ_ASSERT(aRequest->IsLoading());
|
|
MOZ_ASSERT(!ModuleMapContainsModule(aRequest));
|
|
mFetchingModules.Put(aRequest->mURI, nullptr);
|
|
}
|
|
|
|
void
|
|
nsScriptLoader::SetModuleFetchFinishedAndResumeWaitingRequests(nsModuleLoadRequest *aRequest,
|
|
nsresult aResult)
|
|
{
|
|
// Update module map with the result of fetching a single module script. The
|
|
// module script pointer is nullptr on error.
|
|
|
|
MOZ_ASSERT(!aRequest->IsReadyToRun());
|
|
|
|
RefPtr<GenericPromise::Private> promise;
|
|
MOZ_ALWAYS_TRUE(mFetchingModules.Get(aRequest->mURI, getter_AddRefs(promise)));
|
|
mFetchingModules.Remove(aRequest->mURI);
|
|
|
|
RefPtr<nsModuleScript> ms(aRequest->mModuleScript);
|
|
MOZ_ASSERT(NS_SUCCEEDED(aResult) == (ms != nullptr));
|
|
mFetchedModules.Put(aRequest->mURI, ms);
|
|
|
|
if (promise) {
|
|
if (ms) {
|
|
promise->Resolve(true, __func__);
|
|
} else {
|
|
promise->Reject(aResult, __func__);
|
|
}
|
|
}
|
|
}
|
|
|
|
RefPtr<GenericPromise>
|
|
nsScriptLoader::WaitForModuleFetch(nsModuleLoadRequest *aRequest)
|
|
{
|
|
MOZ_ASSERT(ModuleMapContainsModule(aRequest));
|
|
|
|
RefPtr<GenericPromise::Private> promise;
|
|
if (mFetchingModules.Get(aRequest->mURI, getter_AddRefs(promise))) {
|
|
if (!promise) {
|
|
promise = new GenericPromise::Private(__func__);
|
|
mFetchingModules.Put(aRequest->mURI, promise);
|
|
}
|
|
return promise;
|
|
}
|
|
|
|
RefPtr<nsModuleScript> ms;
|
|
MOZ_ALWAYS_TRUE(mFetchedModules.Get(aRequest->mURI, getter_AddRefs(ms)));
|
|
if (!ms) {
|
|
return GenericPromise::CreateAndReject(NS_ERROR_FAILURE, __func__);
|
|
}
|
|
|
|
return GenericPromise::CreateAndResolve(true, __func__);
|
|
}
|
|
|
|
nsModuleScript*
|
|
nsScriptLoader::GetFetchedModule(nsIURI* aURL) const
|
|
{
|
|
bool found;
|
|
nsModuleScript* ms = mFetchedModules.GetWeak(aURL, &found);
|
|
MOZ_ASSERT(found);
|
|
return ms;
|
|
}
|
|
|
|
nsresult
|
|
nsScriptLoader::ProcessFetchedModuleSource(nsModuleLoadRequest* aRequest)
|
|
{
|
|
MOZ_ASSERT(!aRequest->mModuleScript);
|
|
|
|
nsresult rv = CreateModuleScript(aRequest);
|
|
SetModuleFetchFinishedAndResumeWaitingRequests(aRequest, rv);
|
|
|
|
free(aRequest->mScriptTextBuf);
|
|
aRequest->mScriptTextBuf = nullptr;
|
|
aRequest->mScriptTextLength = 0;
|
|
|
|
if (NS_SUCCEEDED(rv)) {
|
|
StartFetchingModuleDependencies(aRequest);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
nsScriptLoader::CreateModuleScript(nsModuleLoadRequest* aRequest)
|
|
{
|
|
MOZ_ASSERT(!aRequest->mModuleScript);
|
|
MOZ_ASSERT(aRequest->mBaseURL);
|
|
|
|
nsCOMPtr<nsIScriptGlobalObject> globalObject = GetScriptGlobalObject();
|
|
if (!globalObject) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsCOMPtr<nsIScriptContext> context = globalObject->GetScriptContext();
|
|
if (!context) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsAutoMicroTask mt;
|
|
AutoEntryScript aes(globalObject, "CompileModule", true);
|
|
|
|
bool oldProcessingScriptTag = context->GetProcessingScriptTag();
|
|
context->SetProcessingScriptTag(true);
|
|
|
|
nsresult rv;
|
|
{
|
|
// Update our current script.
|
|
AutoCurrentScriptUpdater scriptUpdater(this, aRequest->mElement);
|
|
Maybe<AutoCurrentScriptUpdater> masterScriptUpdater;
|
|
nsCOMPtr<nsIDocument> master = mDocument->MasterDocument();
|
|
if (master != mDocument) {
|
|
masterScriptUpdater.emplace(master->ScriptLoader(),
|
|
aRequest->mElement);
|
|
}
|
|
|
|
JSContext* cx = aes.cx();
|
|
JS::Rooted<JSObject*> module(cx);
|
|
|
|
if (aRequest->mWasCompiledOMT) {
|
|
module = JS::FinishOffThreadModule(cx, aRequest->mOffThreadToken);
|
|
aRequest->mOffThreadToken = nullptr;
|
|
rv = module ? NS_OK : NS_ERROR_FAILURE;
|
|
} else {
|
|
JS::Rooted<JSObject*> global(cx, globalObject->GetGlobalJSObject());
|
|
|
|
JS::CompileOptions options(cx);
|
|
FillCompileOptionsForRequest(aes, aRequest, global, &options);
|
|
|
|
nsAutoString inlineData;
|
|
SourceBufferHolder srcBuf = GetScriptSource(aRequest, inlineData);
|
|
rv = nsJSUtils::CompileModule(cx, srcBuf, global, options, &module);
|
|
}
|
|
MOZ_ASSERT(NS_SUCCEEDED(rv) == (module != nullptr));
|
|
if (module) {
|
|
aRequest->mModuleScript =
|
|
new nsModuleScript(this, aRequest->mBaseURL, module);
|
|
}
|
|
}
|
|
|
|
context->SetProcessingScriptTag(oldProcessingScriptTag);
|
|
|
|
return rv;
|
|
}
|
|
|
|
static bool
|
|
ThrowTypeError(JSContext* aCx, nsModuleScript* aScript,
|
|
const nsString& aMessage)
|
|
{
|
|
JS::Rooted<JSObject*> module(aCx, aScript->ModuleRecord());
|
|
JS::Rooted<JSScript*> script(aCx, JS::GetModuleScript(aCx, module));
|
|
JS::Rooted<JSString*> filename(aCx);
|
|
filename = JS_NewStringCopyZ(aCx, JS_GetScriptFilename(script));
|
|
if (!filename) {
|
|
return false;
|
|
}
|
|
|
|
JS::Rooted<JSString*> message(aCx, JS_NewUCStringCopyZ(aCx, aMessage.get()));
|
|
if (!message) {
|
|
return false;
|
|
}
|
|
|
|
JS::Rooted<JS::Value> error(aCx);
|
|
if (!JS::CreateError(aCx, JSEXN_TYPEERR, nullptr, filename, 0, 0, nullptr,
|
|
message, &error)) {
|
|
return false;
|
|
}
|
|
|
|
JS_SetPendingException(aCx, error);
|
|
return false;
|
|
}
|
|
|
|
static bool
|
|
HandleResolveFailure(JSContext* aCx, nsModuleScript* aScript,
|
|
const nsAString& aSpecifier)
|
|
{
|
|
// TODO: How can we get the line number of the failed import?
|
|
|
|
nsAutoString message(NS_LITERAL_STRING("Error resolving module specifier: "));
|
|
message.Append(aSpecifier);
|
|
|
|
return ThrowTypeError(aCx, aScript, message);
|
|
}
|
|
|
|
static bool
|
|
HandleModuleNotFound(JSContext* aCx, nsModuleScript* aScript,
|
|
const nsAString& aSpecifier)
|
|
{
|
|
// TODO: How can we get the line number of the failed import?
|
|
|
|
nsAutoString message(NS_LITERAL_STRING("Resolved module not found in map: "));
|
|
message.Append(aSpecifier);
|
|
|
|
return ThrowTypeError(aCx, aScript, message);
|
|
}
|
|
|
|
static already_AddRefed<nsIURI>
|
|
ResolveModuleSpecifier(nsModuleScript* aScript,
|
|
const nsAString& aSpecifier)
|
|
{
|
|
// The following module specifiers are allowed by the spec:
|
|
// - a valid absolute URL
|
|
// - a valid relative URL that starts with "/", "./" or "../"
|
|
//
|
|
// Bareword module specifiers are currently disallowed as these may be given
|
|
// special meanings in the future.
|
|
|
|
nsCOMPtr<nsIURI> uri;
|
|
nsresult rv = NS_NewURI(getter_AddRefs(uri), aSpecifier);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
return uri.forget();
|
|
}
|
|
|
|
if (rv != NS_ERROR_MALFORMED_URI) {
|
|
return nullptr;
|
|
}
|
|
|
|
if (!StringBeginsWith(aSpecifier, NS_LITERAL_STRING("/")) &&
|
|
!StringBeginsWith(aSpecifier, NS_LITERAL_STRING("./")) &&
|
|
!StringBeginsWith(aSpecifier, NS_LITERAL_STRING("../"))) {
|
|
return nullptr;
|
|
}
|
|
|
|
rv = NS_NewURI(getter_AddRefs(uri), aSpecifier, nullptr, aScript->BaseURL());
|
|
if (NS_SUCCEEDED(rv)) {
|
|
return uri.forget();
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
static nsresult
|
|
RequestedModuleIsInAncestorList(nsModuleLoadRequest* aRequest, nsIURI* aURL, bool* aResult)
|
|
{
|
|
const size_t ImportDepthLimit = 100;
|
|
|
|
*aResult = false;
|
|
size_t depth = 0;
|
|
while (aRequest) {
|
|
if (depth++ == ImportDepthLimit) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
bool equal;
|
|
nsresult rv = aURL->Equals(aRequest->mURI, &equal);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
if (equal) {
|
|
*aResult = true;
|
|
return NS_OK;
|
|
}
|
|
|
|
aRequest = aRequest->mParent;
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
static nsresult
|
|
ResolveRequestedModules(nsModuleLoadRequest* aRequest, nsCOMArray<nsIURI> &aUrls)
|
|
{
|
|
nsModuleScript* ms = aRequest->mModuleScript;
|
|
|
|
AutoJSAPI jsapi;
|
|
if (!jsapi.Init(ms->ModuleRecord())) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
JSContext* cx = jsapi.cx();
|
|
JS::Rooted<JSObject*> moduleRecord(cx, ms->ModuleRecord());
|
|
JS::Rooted<JSObject*> specifiers(cx, JS::GetRequestedModules(cx, moduleRecord));
|
|
|
|
uint32_t length;
|
|
if (!JS_GetArrayLength(cx, specifiers, &length)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
JS::Rooted<JS::Value> val(cx);
|
|
for (uint32_t i = 0; i < length; i++) {
|
|
if (!JS_GetElement(cx, specifiers, i, &val)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsAutoJSString specifier;
|
|
if (!specifier.init(cx, val)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Let url be the result of resolving a module specifier given module script and requested.
|
|
nsModuleScript* ms = aRequest->mModuleScript;
|
|
nsCOMPtr<nsIURI> uri = ResolveModuleSpecifier(ms, specifier);
|
|
if (!uri) {
|
|
HandleResolveFailure(cx, ms, specifier);
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
bool isAncestor;
|
|
nsresult rv = RequestedModuleIsInAncestorList(aRequest, uri, &isAncestor);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
if (!isAncestor) {
|
|
aUrls.AppendElement(uri.forget());
|
|
}
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsScriptLoader::StartFetchingModuleDependencies(nsModuleLoadRequest* aRequest)
|
|
{
|
|
MOZ_ASSERT(aRequest->mModuleScript);
|
|
MOZ_ASSERT(!aRequest->IsReadyToRun());
|
|
aRequest->mProgress = nsModuleLoadRequest::Progress::FetchingImports;
|
|
|
|
nsCOMArray<nsIURI> urls;
|
|
nsresult rv = ResolveRequestedModules(aRequest, urls);
|
|
if (NS_FAILED(rv)) {
|
|
aRequest->LoadFailed();
|
|
return;
|
|
}
|
|
|
|
if (urls.Length() == 0) {
|
|
// There are no descendents to load so this request is ready.
|
|
aRequest->DependenciesLoaded();
|
|
return;
|
|
}
|
|
|
|
// For each url in urls, fetch a module script tree given url, module script's
|
|
// CORS setting, and module script's settings object.
|
|
nsTArray<RefPtr<GenericPromise>> importsReady;
|
|
for (size_t i = 0; i < urls.Length(); i++) {
|
|
RefPtr<GenericPromise> childReady =
|
|
StartFetchingModuleAndDependencies(aRequest, urls[i]);
|
|
importsReady.AppendElement(childReady);
|
|
}
|
|
|
|
// Wait for all imports to become ready.
|
|
RefPtr<GenericPromise::AllPromiseType> allReady =
|
|
GenericPromise::All(AbstractThread::GetCurrent(), importsReady);
|
|
allReady->Then(AbstractThread::GetCurrent(), __func__, aRequest,
|
|
&nsModuleLoadRequest::DependenciesLoaded,
|
|
&nsModuleLoadRequest::LoadFailed);
|
|
}
|
|
|
|
RefPtr<GenericPromise>
|
|
nsScriptLoader::StartFetchingModuleAndDependencies(nsModuleLoadRequest* aRequest,
|
|
nsIURI* aURI)
|
|
{
|
|
MOZ_ASSERT(aURI);
|
|
|
|
RefPtr<nsModuleLoadRequest> childRequest =
|
|
new nsModuleLoadRequest(aRequest->mElement, aRequest->mJSVersion,
|
|
aRequest->mCORSMode, aRequest->mIntegrity, this);
|
|
|
|
childRequest->mIsTopLevel = false;
|
|
childRequest->mURI = aURI;
|
|
childRequest->mIsInline = false;
|
|
childRequest->mReferrerPolicy = aRequest->mReferrerPolicy;
|
|
childRequest->mParent = aRequest;
|
|
|
|
RefPtr<GenericPromise> ready = childRequest->mReady.Ensure(__func__);
|
|
|
|
nsresult rv = StartLoad(childRequest, NS_LITERAL_STRING("module"), false);
|
|
if (NS_FAILED(rv)) {
|
|
childRequest->mReady.Reject(rv, __func__);
|
|
return ready;
|
|
}
|
|
|
|
aRequest->mImports.AppendElement(childRequest);
|
|
return ready;
|
|
}
|
|
|
|
bool
|
|
HostResolveImportedModule(JSContext* aCx, unsigned argc, JS::Value* vp)
|
|
{
|
|
MOZ_ASSERT(argc == 2);
|
|
JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
|
|
JS::Rooted<JSObject*> module(aCx, &args[0].toObject());
|
|
JS::Rooted<JSString*> specifier(aCx, args[1].toString());
|
|
|
|
// Let referencing module script be referencingModule.[[HostDefined]].
|
|
JS::Value value = JS::GetModuleHostDefinedField(module);
|
|
auto script = static_cast<nsModuleScript*>(value.toPrivate());
|
|
MOZ_ASSERT(script->ModuleRecord() == module);
|
|
|
|
// Let url be the result of resolving a module specifier given referencing
|
|
// module script and specifier. If the result is failure, throw a TypeError
|
|
// exception and abort these steps.
|
|
nsAutoJSString string;
|
|
if (!string.init(aCx, specifier)) {
|
|
return false;
|
|
}
|
|
|
|
nsCOMPtr<nsIURI> uri = ResolveModuleSpecifier(script, string);
|
|
if (!uri) {
|
|
return HandleResolveFailure(aCx, script, string);
|
|
}
|
|
|
|
// Let resolved module script be the value of the entry in module map whose
|
|
// key is url. If no such entry exists, throw a TypeError exception and abort
|
|
// these steps.
|
|
nsModuleScript* ms = script->Loader()->GetFetchedModule(uri);
|
|
if (!ms) {
|
|
return HandleModuleNotFound(aCx, script, string);
|
|
}
|
|
|
|
if (ms->InstantiationFailed()) {
|
|
JS::Rooted<JS::Value> exception(aCx, ms->Exception());
|
|
JS_SetPendingException(aCx, exception);
|
|
return false;
|
|
}
|
|
|
|
*vp = JS::ObjectValue(*ms->ModuleRecord());
|
|
return true;
|
|
}
|
|
|
|
static nsresult
|
|
EnsureModuleResolveHook(JSContext* aCx)
|
|
{
|
|
if (JS::GetModuleResolveHook(aCx)) {
|
|
return NS_OK;
|
|
}
|
|
|
|
JS::Rooted<JSFunction*> func(aCx);
|
|
func = JS_NewFunction(aCx, HostResolveImportedModule, 2, 0,
|
|
"HostResolveImportedModule");
|
|
if (!func) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
JS::SetModuleResolveHook(aCx, func);
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsScriptLoader::ProcessLoadedModuleTree(nsModuleLoadRequest* aRequest)
|
|
{
|
|
if (aRequest->IsTopLevel()) {
|
|
MaybeMoveToLoadedList(aRequest);
|
|
ProcessPendingRequests();
|
|
}
|
|
|
|
if (aRequest->mWasCompiledOMT) {
|
|
mDocument->UnblockOnload(false);
|
|
}
|
|
}
|
|
|
|
bool
|
|
nsScriptLoader::InstantiateModuleTree(nsModuleLoadRequest* aRequest)
|
|
{
|
|
// Perform eager instantiation of the loaded module tree.
|
|
|
|
MOZ_ASSERT(aRequest);
|
|
|
|
nsModuleScript* ms = aRequest->mModuleScript;
|
|
MOZ_ASSERT(ms);
|
|
if (!ms->ModuleRecord()) {
|
|
return false;
|
|
}
|
|
|
|
AutoJSAPI jsapi;
|
|
if (NS_WARN_IF(!jsapi.Init(ms->ModuleRecord()))) {
|
|
return false;
|
|
}
|
|
|
|
nsresult rv = EnsureModuleResolveHook(jsapi.cx());
|
|
NS_ENSURE_SUCCESS(rv, false);
|
|
|
|
JS::Rooted<JSObject*> module(jsapi.cx(), ms->ModuleRecord());
|
|
bool ok = NS_SUCCEEDED(nsJSUtils::ModuleDeclarationInstantiation(jsapi.cx(), module));
|
|
|
|
JS::RootedValue exception(jsapi.cx());
|
|
if (!ok) {
|
|
MOZ_ASSERT(jsapi.HasException());
|
|
if (!jsapi.StealException(&exception)) {
|
|
return false;
|
|
}
|
|
MOZ_ASSERT(!exception.isUndefined());
|
|
}
|
|
|
|
// Mark this module and any uninstantiated dependencies found via depth-first
|
|
// search as instantiated and record any error.
|
|
|
|
mozilla::Vector<nsModuleLoadRequest*, 1> requests;
|
|
if (!requests.append(aRequest)) {
|
|
return false;
|
|
}
|
|
|
|
while (!requests.empty()) {
|
|
nsModuleLoadRequest* request = requests.popCopy();
|
|
nsModuleScript* ms = request->mModuleScript;
|
|
if (!ms->IsUninstantiated()) {
|
|
continue;
|
|
}
|
|
|
|
ms->SetInstantiationResult(exception);
|
|
|
|
for (auto import : request->mImports) {
|
|
if (import->mModuleScript->IsUninstantiated() &&
|
|
!requests.append(import))
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
nsresult
|
|
nsScriptLoader::StartLoad(nsScriptLoadRequest *aRequest, const nsAString &aType,
|
|
bool aScriptFromHead)
|
|
{
|
|
MOZ_ASSERT(aRequest->IsLoading());
|
|
|
|
// If this document is sandboxed without 'allow-scripts', abort.
|
|
if (mDocument->HasScriptsBlockedBySandbox()) {
|
|
return NS_OK;
|
|
}
|
|
|
|
if (aRequest->IsModuleRequest()) {
|
|
// Check whether the module has been fetched or is currently being fetched,
|
|
// and if so wait for it.
|
|
nsModuleLoadRequest* request = aRequest->AsModuleRequest();
|
|
if (ModuleMapContainsModule(request)) {
|
|
WaitForModuleFetch(request)
|
|
->Then(AbstractThread::GetCurrent(), __func__, request,
|
|
&nsModuleLoadRequest::ModuleLoaded,
|
|
&nsModuleLoadRequest::LoadFailed);
|
|
return NS_OK;
|
|
}
|
|
|
|
// Otherwise put the URL in the module map and mark it as fetching.
|
|
SetModuleFetchStarted(request);
|
|
}
|
|
|
|
nsContentPolicyType contentPolicyType = aRequest->IsPreload()
|
|
? nsIContentPolicy::TYPE_INTERNAL_SCRIPT_PRELOAD
|
|
: nsIContentPolicy::TYPE_INTERNAL_SCRIPT;
|
|
nsCOMPtr<nsINode> context;
|
|
if (aRequest->mElement) {
|
|
context = do_QueryInterface(aRequest->mElement);
|
|
}
|
|
else {
|
|
context = mDocument;
|
|
}
|
|
|
|
nsCOMPtr<nsILoadGroup> loadGroup = mDocument->GetDocumentLoadGroup();
|
|
nsCOMPtr<nsPIDOMWindowOuter> window = mDocument->MasterDocument()->GetWindow();
|
|
NS_ENSURE_TRUE(window, NS_ERROR_NULL_POINTER);
|
|
nsIDocShell *docshell = window->GetDocShell();
|
|
nsCOMPtr<nsIInterfaceRequestor> prompter(do_QueryInterface(docshell));
|
|
|
|
nsSecurityFlags securityFlags;
|
|
// TODO: the spec currently gives module scripts different CORS behaviour to
|
|
// classic scripts.
|
|
securityFlags = aRequest->mCORSMode == CORS_NONE
|
|
? nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_IS_NULL
|
|
: nsILoadInfo::SEC_REQUIRE_CORS_DATA_INHERITS;
|
|
if (aRequest->mCORSMode == CORS_ANONYMOUS) {
|
|
securityFlags |= nsILoadInfo::SEC_COOKIES_SAME_ORIGIN;
|
|
} else if (aRequest->mCORSMode == CORS_USE_CREDENTIALS) {
|
|
securityFlags |= nsILoadInfo::SEC_COOKIES_INCLUDE;
|
|
}
|
|
securityFlags |= nsILoadInfo::SEC_ALLOW_CHROME;
|
|
|
|
nsCOMPtr<nsIChannel> channel;
|
|
nsresult rv = NS_NewChannel(getter_AddRefs(channel),
|
|
aRequest->mURI,
|
|
context,
|
|
securityFlags,
|
|
contentPolicyType,
|
|
loadGroup,
|
|
prompter,
|
|
nsIRequest::LOAD_NORMAL |
|
|
nsIChannel::LOAD_CLASSIFY_URI);
|
|
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
nsIScriptElement *script = aRequest->mElement;
|
|
nsCOMPtr<nsIClassOfService> cos(do_QueryInterface(channel));
|
|
|
|
if (cos) {
|
|
if (aScriptFromHead &&
|
|
!(script && (script->GetScriptAsync() || script->GetScriptDeferred()))) {
|
|
// synchronous head scripts block lading of most other non js/css
|
|
// content such as images
|
|
cos->AddClassFlags(nsIClassOfService::Leader);
|
|
} else if (!(script && script->GetScriptDeferred())) {
|
|
// other scripts are neither blocked nor prioritized unless marked deferred
|
|
cos->AddClassFlags(nsIClassOfService::Unblocked);
|
|
}
|
|
}
|
|
|
|
nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(channel));
|
|
if (httpChannel) {
|
|
// HTTP content negotation has little value in this context.
|
|
httpChannel->SetRequestHeader(NS_LITERAL_CSTRING("Accept"),
|
|
NS_LITERAL_CSTRING("*/*"),
|
|
false);
|
|
httpChannel->SetReferrerWithPolicy(mDocument->GetDocumentURI(),
|
|
aRequest->mReferrerPolicy);
|
|
|
|
nsCOMPtr<nsIHttpChannelInternal> internalChannel(do_QueryInterface(httpChannel));
|
|
if (internalChannel) {
|
|
internalChannel->SetIntegrityMetadata(aRequest->mIntegrity.GetIntegrityString());
|
|
}
|
|
}
|
|
|
|
nsCOMPtr<nsILoadContext> loadContext(do_QueryInterface(docshell));
|
|
mozilla::net::PredictorLearn(aRequest->mURI, mDocument->GetDocumentURI(),
|
|
nsINetworkPredictor::LEARN_LOAD_SUBRESOURCE, loadContext);
|
|
|
|
// Set the initiator type
|
|
nsCOMPtr<nsITimedChannel> timedChannel(do_QueryInterface(httpChannel));
|
|
if (timedChannel) {
|
|
timedChannel->SetInitiatorType(NS_LITERAL_STRING("script"));
|
|
}
|
|
|
|
nsAutoPtr<mozilla::dom::SRICheckDataVerifier> sriDataVerifier;
|
|
if (!aRequest->mIntegrity.IsEmpty()) {
|
|
nsAutoCString sourceUri;
|
|
if (mDocument && mDocument->GetDocumentURI()) {
|
|
mDocument->GetDocumentURI()->GetAsciiSpec(sourceUri);
|
|
}
|
|
sriDataVerifier = new SRICheckDataVerifier(aRequest->mIntegrity, sourceUri,
|
|
mReporter);
|
|
}
|
|
|
|
RefPtr<nsScriptLoadHandler> handler =
|
|
new nsScriptLoadHandler(this, aRequest, sriDataVerifier.forget());
|
|
|
|
nsCOMPtr<nsIIncrementalStreamLoader> loader;
|
|
rv = NS_NewIncrementalStreamLoader(getter_AddRefs(loader), handler);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
return channel->AsyncOpen2(loader);
|
|
}
|
|
|
|
bool
|
|
nsScriptLoader::PreloadURIComparator::Equals(const PreloadInfo &aPi,
|
|
nsIURI * const &aURI) const
|
|
{
|
|
bool same;
|
|
return NS_SUCCEEDED(aPi.mRequest->mURI->Equals(aURI, &same)) &&
|
|
same;
|
|
}
|
|
|
|
class nsScriptRequestProcessor : public Runnable
|
|
{
|
|
private:
|
|
RefPtr<nsScriptLoader> mLoader;
|
|
RefPtr<nsScriptLoadRequest> mRequest;
|
|
public:
|
|
nsScriptRequestProcessor(nsScriptLoader* aLoader,
|
|
nsScriptLoadRequest* aRequest)
|
|
: mLoader(aLoader)
|
|
, mRequest(aRequest)
|
|
{}
|
|
NS_IMETHOD Run() override
|
|
{
|
|
return mLoader->ProcessRequest(mRequest);
|
|
}
|
|
};
|
|
|
|
static inline bool
|
|
ParseTypeAttribute(const nsAString& aType, JSVersion* aVersion)
|
|
{
|
|
MOZ_ASSERT(!aType.IsEmpty());
|
|
MOZ_ASSERT(aVersion);
|
|
MOZ_ASSERT(*aVersion == JSVERSION_DEFAULT);
|
|
|
|
nsContentTypeParser parser(aType);
|
|
|
|
nsAutoString mimeType;
|
|
nsresult rv = parser.GetType(mimeType);
|
|
NS_ENSURE_SUCCESS(rv, false);
|
|
|
|
if (!nsContentUtils::IsJavascriptMIMEType(mimeType)) {
|
|
return false;
|
|
}
|
|
|
|
// Get the version string, and ensure the language supports it.
|
|
nsAutoString versionName;
|
|
rv = parser.GetParameter("version", versionName);
|
|
|
|
if (NS_SUCCEEDED(rv)) {
|
|
*aVersion = nsContentUtils::ParseJavascriptVersion(versionName);
|
|
} else if (rv != NS_ERROR_INVALID_ARG) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static bool
|
|
CSPAllowsInlineScript(nsIScriptElement *aElement, nsIDocument *aDocument)
|
|
{
|
|
nsCOMPtr<nsIContentSecurityPolicy> csp;
|
|
// Note: For imports NodePrincipal and the principal of the master are
|
|
// the same.
|
|
nsresult rv = aDocument->NodePrincipal()->GetCsp(getter_AddRefs(csp));
|
|
NS_ENSURE_SUCCESS(rv, false);
|
|
|
|
if (!csp) {
|
|
// no CSP --> allow
|
|
return true;
|
|
}
|
|
|
|
// query the nonce
|
|
nsCOMPtr<nsIContent> scriptContent = do_QueryInterface(aElement);
|
|
nsAutoString nonce;
|
|
scriptContent->GetAttr(kNameSpaceID_None, nsGkAtoms::nonce, nonce);
|
|
|
|
// query the scripttext
|
|
nsAutoString scriptText;
|
|
aElement->GetScriptText(scriptText);
|
|
|
|
bool allowInlineScript = false;
|
|
rv = csp->GetAllowsInline(nsIContentPolicy::TYPE_SCRIPT,
|
|
nonce, scriptText,
|
|
aElement->GetScriptLineNumber(),
|
|
&allowInlineScript);
|
|
return allowInlineScript;
|
|
}
|
|
|
|
nsScriptLoadRequest*
|
|
nsScriptLoader::CreateLoadRequest(nsScriptKind aKind,
|
|
nsIScriptElement* aElement,
|
|
uint32_t aVersion, CORSMode aCORSMode,
|
|
const SRIMetadata &aIntegrity)
|
|
{
|
|
if (aKind == nsScriptKind::Classic) {
|
|
return new nsScriptLoadRequest(aKind, aElement, aVersion, aCORSMode,
|
|
aIntegrity);
|
|
}
|
|
|
|
MOZ_ASSERT(aKind == nsScriptKind::Module);
|
|
return new nsModuleLoadRequest(aElement, aVersion, aCORSMode, aIntegrity,
|
|
this);
|
|
}
|
|
|
|
bool
|
|
nsScriptLoader::ProcessScriptElement(nsIScriptElement *aElement)
|
|
{
|
|
// We need a document to evaluate scripts.
|
|
NS_ENSURE_TRUE(mDocument, false);
|
|
|
|
// Check to see if scripts has been turned off.
|
|
if (!mEnabled || !mDocument->IsScriptEnabled()) {
|
|
return false;
|
|
}
|
|
|
|
NS_ASSERTION(!aElement->IsMalformed(), "Executing malformed script");
|
|
|
|
nsCOMPtr<nsIContent> scriptContent = do_QueryInterface(aElement);
|
|
|
|
// Step 12. Check that the script is not an eventhandler
|
|
if (IsScriptEventHandler(scriptContent)) {
|
|
return false;
|
|
}
|
|
|
|
JSVersion version = JSVERSION_DEFAULT;
|
|
|
|
// Check the type attribute to determine language and version.
|
|
// If type exists, it trumps the deprecated 'language='
|
|
nsAutoString type;
|
|
bool hasType = aElement->GetScriptType(type);
|
|
|
|
nsScriptKind scriptKind = nsScriptKind::Classic;
|
|
if (!type.IsEmpty()) {
|
|
// Support type="module" only for chrome documents.
|
|
if (nsContentUtils::IsChromeDoc(mDocument) && type.LowerCaseEqualsASCII("module")) {
|
|
scriptKind = nsScriptKind::Module;
|
|
} else {
|
|
NS_ENSURE_TRUE(ParseTypeAttribute(type, &version), false);
|
|
}
|
|
} else if (!hasType) {
|
|
// no 'type=' element
|
|
// "language" is a deprecated attribute of HTML, so we check it only for
|
|
// HTML script elements.
|
|
if (scriptContent->IsHTMLElement()) {
|
|
nsAutoString language;
|
|
scriptContent->GetAttr(kNameSpaceID_None, nsGkAtoms::language, language);
|
|
if (!language.IsEmpty()) {
|
|
if (!nsContentUtils::IsJavaScriptLanguage(language)) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// Step 14. in the HTML5 spec
|
|
nsresult rv = NS_OK;
|
|
RefPtr<nsScriptLoadRequest> request;
|
|
if (aElement->GetScriptExternal()) {
|
|
// external script
|
|
nsCOMPtr<nsIURI> scriptURI = aElement->GetScriptURI();
|
|
if (!scriptURI) {
|
|
// Asynchronously report the failure to create a URI object
|
|
NS_DispatchToCurrentThread(
|
|
NewRunnableMethod(aElement,
|
|
&nsIScriptElement::FireErrorEvent));
|
|
return false;
|
|
}
|
|
|
|
// Double-check that the preload matches what we're asked to load now.
|
|
mozilla::net::ReferrerPolicy ourRefPolicy = mDocument->GetReferrerPolicy();
|
|
CORSMode ourCORSMode = aElement->GetCORSMode();
|
|
nsTArray<PreloadInfo>::index_type i =
|
|
mPreloads.IndexOf(scriptURI.get(), 0, PreloadURIComparator());
|
|
if (i != nsTArray<PreloadInfo>::NoIndex) {
|
|
// preloaded
|
|
// note that a script-inserted script can steal a preload!
|
|
request = mPreloads[i].mRequest;
|
|
request->mElement = aElement;
|
|
nsString preloadCharset(mPreloads[i].mCharset);
|
|
mPreloads.RemoveElementAt(i);
|
|
|
|
// Double-check that the charset the preload used is the same as
|
|
// the charset we have now.
|
|
nsAutoString elementCharset;
|
|
aElement->GetScriptCharset(elementCharset);
|
|
if (elementCharset.Equals(preloadCharset) &&
|
|
ourCORSMode == request->mCORSMode &&
|
|
ourRefPolicy == request->mReferrerPolicy &&
|
|
scriptKind == request->mKind) {
|
|
rv = CheckContentPolicy(mDocument, aElement, request->mURI, type, false);
|
|
if (NS_FAILED(rv)) {
|
|
// probably plans have changed; even though the preload was allowed seems
|
|
// like the actual load is not; let's cancel the preload request.
|
|
request->Cancel();
|
|
return false;
|
|
}
|
|
} else {
|
|
// Drop the preload
|
|
request = nullptr;
|
|
}
|
|
}
|
|
|
|
if (!request) {
|
|
// no usable preload
|
|
|
|
SRIMetadata sriMetadata;
|
|
{
|
|
nsAutoString integrity;
|
|
scriptContent->GetAttr(kNameSpaceID_None, nsGkAtoms::integrity,
|
|
integrity);
|
|
if (!integrity.IsEmpty()) {
|
|
MOZ_LOG(SRILogHelper::GetSriLog(), mozilla::LogLevel::Debug,
|
|
("nsScriptLoader::ProcessScriptElement, integrity=%s",
|
|
NS_ConvertUTF16toUTF8(integrity).get()));
|
|
nsAutoCString sourceUri;
|
|
if (mDocument && mDocument->GetDocumentURI()) {
|
|
mDocument->GetDocumentURI()->GetAsciiSpec(sourceUri);
|
|
}
|
|
SRICheck::IntegrityMetadata(integrity, sourceUri, mReporter,
|
|
&sriMetadata);
|
|
}
|
|
}
|
|
|
|
request = CreateLoadRequest(scriptKind, aElement, version, ourCORSMode,
|
|
sriMetadata);
|
|
request->mURI = scriptURI;
|
|
request->mIsInline = false;
|
|
request->mReferrerPolicy = ourRefPolicy;
|
|
|
|
// set aScriptFromHead to false so we don't treat non preloaded scripts as
|
|
// blockers for full page load. See bug 792438.
|
|
rv = StartLoad(request, type, false);
|
|
if (NS_FAILED(rv)) {
|
|
// Asynchronously report the load failure
|
|
NS_DispatchToCurrentThread(
|
|
NewRunnableMethod(aElement,
|
|
&nsIScriptElement::FireErrorEvent));
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Should still be in loading stage of script.
|
|
NS_ASSERTION(!request->InCompilingStage(),
|
|
"Request should not yet be in compiling stage.");
|
|
|
|
request->mJSVersion = version;
|
|
|
|
if (aElement->GetScriptAsync()) {
|
|
request->mIsAsync = true;
|
|
if (request->IsReadyToRun()) {
|
|
mLoadedAsyncRequests.AppendElement(request);
|
|
// The script is available already. Run it ASAP when the event
|
|
// loop gets a chance to spin.
|
|
|
|
// KVKV TODO: Instead of processing immediately, try off-thread-parsing
|
|
// it and only schedule a pending ProcessRequest if that fails.
|
|
ProcessPendingRequestsAsync();
|
|
} else {
|
|
mLoadingAsyncRequests.AppendElement(request);
|
|
}
|
|
return false;
|
|
}
|
|
if (!aElement->GetParserCreated() && !request->IsModuleRequest()) {
|
|
// Violate the HTML5 spec in order to make LABjs and the "order" plug-in
|
|
// for RequireJS work with their Gecko-sniffed code path. See
|
|
// http://lists.w3.org/Archives/Public/public-html/2010Oct/0088.html
|
|
request->mIsNonAsyncScriptInserted = true;
|
|
mNonAsyncExternalScriptInsertedRequests.AppendElement(request);
|
|
if (request->IsReadyToRun()) {
|
|
// The script is available already. Run it ASAP when the event
|
|
// loop gets a chance to spin.
|
|
ProcessPendingRequestsAsync();
|
|
}
|
|
return false;
|
|
}
|
|
// we now have a parser-inserted request that may or may not be still
|
|
// loading
|
|
if (aElement->GetScriptDeferred() || request->IsModuleRequest()) {
|
|
// We don't want to run this yet.
|
|
// If we come here, the script is a parser-created script and it has
|
|
// the defer attribute but not the async attribute. Since a
|
|
// a parser-inserted script is being run, we came here by the parser
|
|
// running the script, which means the parser is still alive and the
|
|
// parse is ongoing.
|
|
NS_ASSERTION(mDocument->GetCurrentContentSink() ||
|
|
aElement->GetParserCreated() == FROM_PARSER_XSLT,
|
|
"Non-XSLT Defer script on a document without an active parser; bug 592366.");
|
|
AddDeferRequest(request);
|
|
return false;
|
|
}
|
|
|
|
if (aElement->GetParserCreated() == FROM_PARSER_XSLT) {
|
|
// Need to maintain order for XSLT-inserted scripts
|
|
NS_ASSERTION(!mParserBlockingRequest,
|
|
"Parser-blocking scripts and XSLT scripts in the same doc!");
|
|
request->mIsXSLT = true;
|
|
mXSLTRequests.AppendElement(request);
|
|
if (request->IsReadyToRun()) {
|
|
// The script is available already. Run it ASAP when the event
|
|
// loop gets a chance to spin.
|
|
ProcessPendingRequestsAsync();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
if (request->IsReadyToRun() && ReadyToExecuteParserBlockingScripts()) {
|
|
// The request has already been loaded and there are no pending style
|
|
// sheets. If the script comes from the network stream, cheat for
|
|
// performance reasons and avoid a trip through the event loop.
|
|
if (aElement->GetParserCreated() == FROM_PARSER_NETWORK) {
|
|
return ProcessRequest(request) == NS_ERROR_HTMLPARSER_BLOCK;
|
|
}
|
|
// Otherwise, we've got a document.written script, make a trip through
|
|
// the event loop to hide the preload effects from the scripts on the
|
|
// Web page.
|
|
NS_ASSERTION(!mParserBlockingRequest,
|
|
"There can be only one parser-blocking script at a time");
|
|
NS_ASSERTION(mXSLTRequests.isEmpty(),
|
|
"Parser-blocking scripts and XSLT scripts in the same doc!");
|
|
mParserBlockingRequest = request;
|
|
ProcessPendingRequestsAsync();
|
|
return true;
|
|
}
|
|
|
|
// The script hasn't loaded yet or there's a style sheet blocking it.
|
|
// The script will be run when it loads or the style sheet loads.
|
|
NS_ASSERTION(!mParserBlockingRequest,
|
|
"There can be only one parser-blocking script at a time");
|
|
NS_ASSERTION(mXSLTRequests.isEmpty(),
|
|
"Parser-blocking scripts and XSLT scripts in the same doc!");
|
|
mParserBlockingRequest = request;
|
|
return true;
|
|
}
|
|
|
|
// inline script
|
|
// Is this document sandboxed without 'allow-scripts'?
|
|
if (mDocument->HasScriptsBlockedBySandbox()) {
|
|
return false;
|
|
}
|
|
|
|
// Does CSP allow this inline script to run?
|
|
if (!CSPAllowsInlineScript(aElement, mDocument)) {
|
|
return false;
|
|
}
|
|
|
|
// Inline scripts ignore ther CORS mode and are always CORS_NONE
|
|
request = CreateLoadRequest(scriptKind, aElement, version, CORS_NONE,
|
|
SRIMetadata()); // SRI doesn't apply
|
|
request->mJSVersion = version;
|
|
request->mIsInline = true;
|
|
request->mURI = mDocument->GetDocumentURI();
|
|
request->mLineNo = aElement->GetScriptLineNumber();
|
|
|
|
if (request->IsModuleRequest()) {
|
|
nsModuleLoadRequest* modReq = request->AsModuleRequest();
|
|
modReq->mBaseURL = mDocument->GetDocBaseURI();
|
|
rv = CreateModuleScript(modReq);
|
|
NS_ENSURE_SUCCESS(rv, false);
|
|
StartFetchingModuleDependencies(modReq);
|
|
if (aElement->GetScriptAsync()) {
|
|
mLoadingAsyncRequests.AppendElement(request);
|
|
} else {
|
|
AddDeferRequest(request);
|
|
}
|
|
return false;
|
|
}
|
|
request->mProgress = nsScriptLoadRequest::Progress::Ready;
|
|
if (aElement->GetParserCreated() == FROM_PARSER_XSLT &&
|
|
(!ReadyToExecuteParserBlockingScripts() || !mXSLTRequests.isEmpty())) {
|
|
// Need to maintain order for XSLT-inserted scripts
|
|
NS_ASSERTION(!mParserBlockingRequest,
|
|
"Parser-blocking scripts and XSLT scripts in the same doc!");
|
|
mXSLTRequests.AppendElement(request);
|
|
return true;
|
|
}
|
|
if (aElement->GetParserCreated() == NOT_FROM_PARSER) {
|
|
NS_ASSERTION(!nsContentUtils::IsSafeToRunScript(),
|
|
"A script-inserted script is inserted without an update batch?");
|
|
nsContentUtils::AddScriptRunner(new nsScriptRequestProcessor(this,
|
|
request));
|
|
return false;
|
|
}
|
|
if (aElement->GetParserCreated() == FROM_PARSER_NETWORK &&
|
|
!ReadyToExecuteParserBlockingScripts()) {
|
|
NS_ASSERTION(!mParserBlockingRequest,
|
|
"There can be only one parser-blocking script at a time");
|
|
mParserBlockingRequest = request;
|
|
NS_ASSERTION(mXSLTRequests.isEmpty(),
|
|
"Parser-blocking scripts and XSLT scripts in the same doc!");
|
|
return true;
|
|
}
|
|
// We now have a document.written inline script or we have an inline script
|
|
// from the network but there is no style sheet that is blocking scripts.
|
|
// Don't check for style sheets blocking scripts in the document.write
|
|
// case to avoid style sheet network activity affecting when
|
|
// document.write returns. It's not really necessary to do this if
|
|
// there's no document.write currently on the call stack. However,
|
|
// this way matches IE more closely than checking if document.write
|
|
// is on the call stack.
|
|
NS_ASSERTION(nsContentUtils::IsSafeToRunScript(),
|
|
"Not safe to run a parser-inserted script?");
|
|
return ProcessRequest(request) == NS_ERROR_HTMLPARSER_BLOCK;
|
|
}
|
|
|
|
namespace {
|
|
|
|
class NotifyOffThreadScriptLoadCompletedRunnable : public Runnable
|
|
{
|
|
RefPtr<nsScriptLoadRequest> mRequest;
|
|
RefPtr<nsScriptLoader> mLoader;
|
|
void *mToken;
|
|
|
|
public:
|
|
NotifyOffThreadScriptLoadCompletedRunnable(nsScriptLoadRequest* aRequest,
|
|
nsScriptLoader* aLoader)
|
|
: mRequest(aRequest), mLoader(aLoader), mToken(nullptr)
|
|
{}
|
|
|
|
virtual ~NotifyOffThreadScriptLoadCompletedRunnable();
|
|
|
|
void SetToken(void* aToken) {
|
|
MOZ_ASSERT(aToken && !mToken);
|
|
mToken = aToken;
|
|
}
|
|
|
|
NS_DECL_NSIRUNNABLE
|
|
};
|
|
|
|
} /* anonymous namespace */
|
|
|
|
nsresult
|
|
nsScriptLoader::ProcessOffThreadRequest(nsScriptLoadRequest* aRequest)
|
|
{
|
|
MOZ_ASSERT(aRequest->mProgress == nsScriptLoadRequest::Progress::Compiling);
|
|
MOZ_ASSERT(!aRequest->mWasCompiledOMT);
|
|
|
|
aRequest->mWasCompiledOMT = true;
|
|
|
|
if (aRequest->IsModuleRequest()) {
|
|
MOZ_ASSERT(aRequest->mOffThreadToken);
|
|
nsModuleLoadRequest* request = aRequest->AsModuleRequest();
|
|
nsresult rv = ProcessFetchedModuleSource(request);
|
|
if (NS_FAILED(rv)) {
|
|
request->LoadFailed();
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
aRequest->SetReady();
|
|
|
|
if (aRequest == mParserBlockingRequest) {
|
|
if (!ReadyToExecuteParserBlockingScripts()) {
|
|
// If not ready to execute scripts, schedule an async call to
|
|
// ProcessPendingRequests to handle it.
|
|
ProcessPendingRequestsAsync();
|
|
return NS_OK;
|
|
}
|
|
|
|
// Same logic as in top of ProcessPendingRequests.
|
|
mParserBlockingRequest = nullptr;
|
|
UnblockParser(aRequest);
|
|
ProcessRequest(aRequest);
|
|
mDocument->UnblockOnload(false);
|
|
ContinueParserAsync(aRequest);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult rv = ProcessRequest(aRequest);
|
|
mDocument->UnblockOnload(false);
|
|
return rv;
|
|
}
|
|
|
|
NotifyOffThreadScriptLoadCompletedRunnable::~NotifyOffThreadScriptLoadCompletedRunnable()
|
|
{
|
|
if (MOZ_UNLIKELY(mRequest || mLoader) && !NS_IsMainThread()) {
|
|
NS_ReleaseOnMainThread(mRequest.forget());
|
|
NS_ReleaseOnMainThread(mLoader.forget());
|
|
}
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
NotifyOffThreadScriptLoadCompletedRunnable::Run()
|
|
{
|
|
MOZ_ASSERT(NS_IsMainThread());
|
|
|
|
// We want these to be dropped on the main thread, once we return from this
|
|
// function.
|
|
RefPtr<nsScriptLoadRequest> request = mRequest.forget();
|
|
RefPtr<nsScriptLoader> loader = mLoader.forget();
|
|
|
|
request->mOffThreadToken = mToken;
|
|
nsresult rv = loader->ProcessOffThreadRequest(request);
|
|
|
|
return rv;
|
|
}
|
|
|
|
static void
|
|
OffThreadScriptLoaderCallback(void *aToken, void *aCallbackData)
|
|
{
|
|
RefPtr<NotifyOffThreadScriptLoadCompletedRunnable> aRunnable =
|
|
dont_AddRef(static_cast<NotifyOffThreadScriptLoadCompletedRunnable*>(aCallbackData));
|
|
aRunnable->SetToken(aToken);
|
|
NS_DispatchToMainThread(aRunnable);
|
|
}
|
|
|
|
nsresult
|
|
nsScriptLoader::AttemptAsyncScriptCompile(nsScriptLoadRequest* aRequest)
|
|
{
|
|
MOZ_ASSERT_IF(!aRequest->IsModuleRequest(), aRequest->IsReadyToRun());
|
|
MOZ_ASSERT(!aRequest->mWasCompiledOMT);
|
|
|
|
// Don't off-thread compile inline scripts.
|
|
if (aRequest->mIsInline) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsCOMPtr<nsIScriptGlobalObject> globalObject = GetScriptGlobalObject();
|
|
if (!globalObject) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
AutoJSAPI jsapi;
|
|
if (!jsapi.Init(globalObject)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
JSContext* cx = jsapi.cx();
|
|
JS::Rooted<JSObject*> global(cx, globalObject->GetGlobalJSObject());
|
|
JS::CompileOptions options(cx);
|
|
FillCompileOptionsForRequest(jsapi, aRequest, global, &options);
|
|
|
|
if (!JS::CanCompileOffThread(cx, options, aRequest->mScriptTextLength)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
RefPtr<NotifyOffThreadScriptLoadCompletedRunnable> runnable =
|
|
new NotifyOffThreadScriptLoadCompletedRunnable(aRequest, this);
|
|
|
|
if (aRequest->IsModuleRequest()) {
|
|
if (!JS::CompileOffThreadModule(cx, options,
|
|
aRequest->mScriptTextBuf, aRequest->mScriptTextLength,
|
|
OffThreadScriptLoaderCallback,
|
|
static_cast<void*>(runnable))) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
} else {
|
|
if (!JS::CompileOffThread(cx, options,
|
|
aRequest->mScriptTextBuf, aRequest->mScriptTextLength,
|
|
OffThreadScriptLoaderCallback,
|
|
static_cast<void*>(runnable))) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
}
|
|
|
|
mDocument->BlockOnload();
|
|
aRequest->mProgress = nsScriptLoadRequest::Progress::Compiling;
|
|
|
|
Unused << runnable.forget();
|
|
return NS_OK;
|
|
}
|
|
|
|
nsresult
|
|
nsScriptLoader::CompileOffThreadOrProcessRequest(nsScriptLoadRequest* aRequest)
|
|
{
|
|
NS_ASSERTION(nsContentUtils::IsSafeToRunScript(),
|
|
"Processing requests when running scripts is unsafe.");
|
|
NS_ASSERTION(!aRequest->mOffThreadToken,
|
|
"Candidate for off-thread compile is already parsed off-thread");
|
|
NS_ASSERTION(!aRequest->InCompilingStage(),
|
|
"Candidate for off-thread compile is already in compiling stage.");
|
|
|
|
nsresult rv = AttemptAsyncScriptCompile(aRequest);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
return ProcessRequest(aRequest);
|
|
}
|
|
|
|
SourceBufferHolder
|
|
nsScriptLoader::GetScriptSource(nsScriptLoadRequest* aRequest, nsAutoString& inlineData)
|
|
{
|
|
// Return a SourceBufferHolder object holding the script's source text.
|
|
// |inlineData| is used to hold the text for inline objects.
|
|
|
|
// If there's no script text, we try to get it from the element
|
|
if (aRequest->mIsInline) {
|
|
// XXX This is inefficient - GetText makes multiple
|
|
// copies.
|
|
aRequest->mElement->GetScriptText(inlineData);
|
|
return SourceBufferHolder(inlineData.get(),
|
|
inlineData.Length(),
|
|
SourceBufferHolder::NoOwnership);
|
|
}
|
|
|
|
return SourceBufferHolder(aRequest->mScriptTextBuf,
|
|
aRequest->mScriptTextLength,
|
|
SourceBufferHolder::NoOwnership);
|
|
}
|
|
|
|
nsresult
|
|
nsScriptLoader::ProcessRequest(nsScriptLoadRequest* aRequest)
|
|
{
|
|
NS_ASSERTION(nsContentUtils::IsSafeToRunScript(),
|
|
"Processing requests when running scripts is unsafe.");
|
|
NS_ASSERTION(aRequest->IsReadyToRun(),
|
|
"Processing a request that is not ready to run.");
|
|
|
|
NS_ENSURE_ARG(aRequest);
|
|
|
|
if (aRequest->IsModuleRequest() &&
|
|
!aRequest->AsModuleRequest()->mModuleScript)
|
|
{
|
|
// There was an error parsing a module script. Nothing to do here.
|
|
FireScriptAvailable(NS_ERROR_FAILURE, aRequest);
|
|
return NS_OK;
|
|
}
|
|
|
|
nsCOMPtr<nsINode> scriptElem = do_QueryInterface(aRequest->mElement);
|
|
|
|
nsCOMPtr<nsIDocument> doc;
|
|
if (!aRequest->mIsInline) {
|
|
doc = scriptElem->OwnerDoc();
|
|
}
|
|
|
|
nsCOMPtr<nsIScriptElement> oldParserInsertedScript;
|
|
uint32_t parserCreated = aRequest->mElement->GetParserCreated();
|
|
if (parserCreated) {
|
|
oldParserInsertedScript = mCurrentParserInsertedScript;
|
|
mCurrentParserInsertedScript = aRequest->mElement;
|
|
}
|
|
|
|
aRequest->mElement->BeginEvaluating();
|
|
|
|
FireScriptAvailable(NS_OK, aRequest);
|
|
|
|
// The window may have gone away by this point, in which case there's no point
|
|
// in trying to run the script.
|
|
nsCOMPtr<nsIDocument> master = mDocument->MasterDocument();
|
|
{
|
|
// Try to perform a microtask checkpoint
|
|
nsAutoMicroTask mt;
|
|
}
|
|
|
|
nsPIDOMWindowInner *pwin = master->GetInnerWindow();
|
|
bool runScript = !!pwin;
|
|
if (runScript) {
|
|
nsContentUtils::DispatchTrustedEvent(scriptElem->OwnerDoc(),
|
|
scriptElem,
|
|
NS_LITERAL_STRING("beforescriptexecute"),
|
|
true, true, &runScript);
|
|
}
|
|
|
|
// Inner window could have gone away after firing beforescriptexecute
|
|
pwin = master->GetInnerWindow();
|
|
if (!pwin) {
|
|
runScript = false;
|
|
}
|
|
|
|
nsresult rv = NS_OK;
|
|
if (runScript) {
|
|
if (doc) {
|
|
doc->BeginEvaluatingExternalScript();
|
|
}
|
|
rv = EvaluateScript(aRequest);
|
|
if (doc) {
|
|
doc->EndEvaluatingExternalScript();
|
|
}
|
|
|
|
nsContentUtils::DispatchTrustedEvent(scriptElem->OwnerDoc(),
|
|
scriptElem,
|
|
NS_LITERAL_STRING("afterscriptexecute"),
|
|
true, false);
|
|
}
|
|
|
|
FireScriptEvaluated(rv, aRequest);
|
|
|
|
aRequest->mElement->EndEvaluating();
|
|
|
|
if (parserCreated) {
|
|
mCurrentParserInsertedScript = oldParserInsertedScript;
|
|
}
|
|
|
|
if (aRequest->mOffThreadToken) {
|
|
// The request was parsed off-main-thread, but the result of the off
|
|
// thread parse was not actually needed to process the request
|
|
// (disappearing window, some other error, ...). Finish the
|
|
// request to avoid leaks in the JS engine.
|
|
MOZ_ASSERT(!aRequest->IsModuleRequest());
|
|
aRequest->MaybeCancelOffThreadScript();
|
|
}
|
|
|
|
// Free any source data.
|
|
free(aRequest->mScriptTextBuf);
|
|
aRequest->mScriptTextBuf = nullptr;
|
|
aRequest->mScriptTextLength = 0;
|
|
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
nsScriptLoader::FireScriptAvailable(nsresult aResult,
|
|
nsScriptLoadRequest* aRequest)
|
|
{
|
|
for (int32_t i = 0; i < mObservers.Count(); i++) {
|
|
nsCOMPtr<nsIScriptLoaderObserver> obs = mObservers[i];
|
|
obs->ScriptAvailable(aResult, aRequest->mElement,
|
|
aRequest->mIsInline, aRequest->mURI,
|
|
aRequest->mLineNo);
|
|
}
|
|
|
|
aRequest->FireScriptAvailable(aResult);
|
|
}
|
|
|
|
void
|
|
nsScriptLoader::FireScriptEvaluated(nsresult aResult,
|
|
nsScriptLoadRequest* aRequest)
|
|
{
|
|
for (int32_t i = 0; i < mObservers.Count(); i++) {
|
|
nsCOMPtr<nsIScriptLoaderObserver> obs = mObservers[i];
|
|
obs->ScriptEvaluated(aResult, aRequest->mElement,
|
|
aRequest->mIsInline);
|
|
}
|
|
|
|
aRequest->FireScriptEvaluated(aResult);
|
|
}
|
|
|
|
already_AddRefed<nsIScriptGlobalObject>
|
|
nsScriptLoader::GetScriptGlobalObject()
|
|
{
|
|
nsCOMPtr<nsIDocument> master = mDocument->MasterDocument();
|
|
nsPIDOMWindowInner *pwin = master->GetInnerWindow();
|
|
if (!pwin) {
|
|
return nullptr;
|
|
}
|
|
|
|
nsCOMPtr<nsIScriptGlobalObject> globalObject = do_QueryInterface(pwin);
|
|
NS_ASSERTION(globalObject, "windows must be global objects");
|
|
|
|
// and make sure we are setup for this type of script.
|
|
nsresult rv = globalObject->EnsureScriptEnvironment();
|
|
if (NS_FAILED(rv)) {
|
|
return nullptr;
|
|
}
|
|
|
|
return globalObject.forget();
|
|
}
|
|
|
|
void
|
|
nsScriptLoader::FillCompileOptionsForRequest(const AutoJSAPI &jsapi,
|
|
nsScriptLoadRequest *aRequest,
|
|
JS::Handle<JSObject *> aScopeChain,
|
|
JS::CompileOptions *aOptions)
|
|
{
|
|
// It's very important to use aRequest->mURI, not the final URI of the channel
|
|
// aRequest ended up getting script data from, as the script filename.
|
|
nsContentUtils::GetWrapperSafeScriptFilename(mDocument, aRequest->mURI, aRequest->mURL);
|
|
|
|
bool isScriptElement = !aRequest->IsModuleRequest() ||
|
|
aRequest->AsModuleRequest()->IsTopLevel();
|
|
aOptions->setIntroductionType(isScriptElement ? "scriptElement"
|
|
: "importedModule");
|
|
aOptions->setFileAndLine(aRequest->mURL.get(), aRequest->mLineNo);
|
|
aOptions->setVersion(JSVersion(aRequest->mJSVersion));
|
|
aOptions->setIsRunOnce(true);
|
|
// We only need the setNoScriptRval bit when compiling off-thread here, since
|
|
// otherwise nsJSUtils::EvaluateString will set it up for us.
|
|
aOptions->setNoScriptRval(true);
|
|
if (aRequest->mHasSourceMapURL) {
|
|
aOptions->setSourceMapURL(aRequest->mSourceMapURL.get());
|
|
}
|
|
if (aRequest->mOriginPrincipal) {
|
|
nsIPrincipal* scriptPrin = nsContentUtils::ObjectPrincipal(aScopeChain);
|
|
bool subsumes = scriptPrin->Subsumes(aRequest->mOriginPrincipal);
|
|
aOptions->setMutedErrors(!subsumes);
|
|
}
|
|
|
|
JSContext* cx = jsapi.cx();
|
|
JS::Rooted<JS::Value> elementVal(cx);
|
|
MOZ_ASSERT(aRequest->mElement);
|
|
if (NS_SUCCEEDED(nsContentUtils::WrapNative(cx, aRequest->mElement,
|
|
&elementVal,
|
|
/* aAllowWrapping = */ true))) {
|
|
MOZ_ASSERT(elementVal.isObject());
|
|
aOptions->setElement(&elementVal.toObject());
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
nsScriptLoader::EvaluateScript(nsScriptLoadRequest* aRequest)
|
|
{
|
|
// We need a document to evaluate scripts.
|
|
if (!mDocument) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
nsCOMPtr<nsIContent> scriptContent(do_QueryInterface(aRequest->mElement));
|
|
nsIDocument* ownerDoc = scriptContent->OwnerDoc();
|
|
if (ownerDoc != mDocument) {
|
|
// Willful violation of HTML5 as of 2010-12-01
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Get the script-type to be used by this element.
|
|
NS_ASSERTION(scriptContent, "no content - what is default script-type?");
|
|
|
|
nsCOMPtr<nsIScriptGlobalObject> globalObject = GetScriptGlobalObject();
|
|
if (!globalObject) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
// Make sure context is a strong reference since we access it after
|
|
// we've executed a script, which may cause all other references to
|
|
// the context to go away.
|
|
nsCOMPtr<nsIScriptContext> context = globalObject->GetScriptContext();
|
|
if (!context) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
JSVersion version = JSVersion(aRequest->mJSVersion);
|
|
if (version == JSVERSION_UNKNOWN) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// New script entry point required, due to the "Create a script" sub-step of
|
|
// http://www.whatwg.org/specs/web-apps/current-work/#execute-the-script-block
|
|
nsAutoMicroTask mt;
|
|
AutoEntryScript aes(globalObject, "<script> element", true);
|
|
JS::Rooted<JSObject*> global(aes.cx(),
|
|
globalObject->GetGlobalJSObject());
|
|
|
|
bool oldProcessingScriptTag = context->GetProcessingScriptTag();
|
|
context->SetProcessingScriptTag(true);
|
|
nsresult rv;
|
|
{
|
|
// Update our current script.
|
|
AutoCurrentScriptUpdater scriptUpdater(this, aRequest->mElement);
|
|
Maybe<AutoCurrentScriptUpdater> masterScriptUpdater;
|
|
nsCOMPtr<nsIDocument> master = mDocument->MasterDocument();
|
|
if (master != mDocument) {
|
|
// If this script belongs to an import document, it will be
|
|
// executed in the context of the master document. During the
|
|
// execution currentScript of the master should refer to this
|
|
// script. So let's update the mCurrentScript of the ScriptLoader
|
|
// of the master document too.
|
|
masterScriptUpdater.emplace(master->ScriptLoader(),
|
|
aRequest->mElement);
|
|
}
|
|
|
|
if (aRequest->IsModuleRequest()) {
|
|
nsModuleLoadRequest* request = aRequest->AsModuleRequest();
|
|
MOZ_ASSERT(request->mModuleScript);
|
|
MOZ_ASSERT(!request->mOffThreadToken);
|
|
nsModuleScript* ms = request->mModuleScript;
|
|
MOZ_ASSERT(!ms->IsUninstantiated());
|
|
if (ms->InstantiationFailed()) {
|
|
JS::Rooted<JS::Value> exception(aes.cx(), ms->Exception());
|
|
JS_SetPendingException(aes.cx(), exception);
|
|
rv = NS_ERROR_FAILURE;
|
|
} else {
|
|
JS::Rooted<JSObject*> module(aes.cx(), ms->ModuleRecord());
|
|
MOZ_ASSERT(module);
|
|
rv = nsJSUtils::ModuleEvaluation(aes.cx(), module);
|
|
}
|
|
} else {
|
|
JS::CompileOptions options(aes.cx());
|
|
FillCompileOptionsForRequest(aes, aRequest, global, &options);
|
|
|
|
nsAutoString inlineData;
|
|
SourceBufferHolder srcBuf = GetScriptSource(aRequest, inlineData);
|
|
rv = nsJSUtils::EvaluateString(aes.cx(), srcBuf, global, options,
|
|
aRequest->OffThreadTokenPtr());
|
|
}
|
|
}
|
|
|
|
context->SetProcessingScriptTag(oldProcessingScriptTag);
|
|
return rv;
|
|
}
|
|
|
|
void
|
|
nsScriptLoader::ProcessPendingRequestsAsync()
|
|
{
|
|
if (mParserBlockingRequest ||
|
|
!mXSLTRequests.isEmpty() ||
|
|
!mLoadedAsyncRequests.isEmpty() ||
|
|
!mNonAsyncExternalScriptInsertedRequests.isEmpty() ||
|
|
!mDeferRequests.isEmpty() ||
|
|
!mPendingChildLoaders.IsEmpty()) {
|
|
NS_DispatchToCurrentThread(NewRunnableMethod(this,
|
|
&nsScriptLoader::ProcessPendingRequests));
|
|
}
|
|
}
|
|
|
|
void
|
|
nsScriptLoader::ProcessPendingRequests()
|
|
{
|
|
RefPtr<nsScriptLoadRequest> request;
|
|
|
|
if (mParserBlockingRequest &&
|
|
mParserBlockingRequest->IsReadyToRun() &&
|
|
ReadyToExecuteParserBlockingScripts()) {
|
|
request.swap(mParserBlockingRequest);
|
|
UnblockParser(request);
|
|
ProcessRequest(request);
|
|
if (request->mWasCompiledOMT) {
|
|
mDocument->UnblockOnload(false);
|
|
}
|
|
ContinueParserAsync(request);
|
|
}
|
|
|
|
while (ReadyToExecuteParserBlockingScripts() &&
|
|
!mXSLTRequests.isEmpty() &&
|
|
mXSLTRequests.getFirst()->IsReadyToRun()) {
|
|
request = mXSLTRequests.StealFirst();
|
|
ProcessRequest(request);
|
|
}
|
|
|
|
while (ReadyToExecuteScripts() && !mLoadedAsyncRequests.isEmpty()) {
|
|
request = mLoadedAsyncRequests.StealFirst();
|
|
if (request->IsModuleRequest()) {
|
|
ProcessRequest(request);
|
|
} else {
|
|
CompileOffThreadOrProcessRequest(request);
|
|
}
|
|
}
|
|
|
|
while (ReadyToExecuteScripts() &&
|
|
!mNonAsyncExternalScriptInsertedRequests.isEmpty() &&
|
|
mNonAsyncExternalScriptInsertedRequests.getFirst()->IsReadyToRun()) {
|
|
// Violate the HTML5 spec and execute these in the insertion order in
|
|
// order to make LABjs and the "order" plug-in for RequireJS work with
|
|
// their Gecko-sniffed code path. See
|
|
// http://lists.w3.org/Archives/Public/public-html/2010Oct/0088.html
|
|
request = mNonAsyncExternalScriptInsertedRequests.StealFirst();
|
|
ProcessRequest(request);
|
|
}
|
|
|
|
if (mDocumentParsingDone && mXSLTRequests.isEmpty()) {
|
|
while (ReadyToExecuteScripts() &&
|
|
!mDeferRequests.isEmpty() &&
|
|
mDeferRequests.getFirst()->IsReadyToRun()) {
|
|
request = mDeferRequests.StealFirst();
|
|
ProcessRequest(request);
|
|
}
|
|
}
|
|
|
|
while (!mPendingChildLoaders.IsEmpty() &&
|
|
ReadyToExecuteParserBlockingScripts()) {
|
|
RefPtr<nsScriptLoader> child = mPendingChildLoaders[0];
|
|
mPendingChildLoaders.RemoveElementAt(0);
|
|
child->RemoveParserBlockingScriptExecutionBlocker();
|
|
}
|
|
|
|
if (mDocumentParsingDone && mDocument && !mParserBlockingRequest &&
|
|
mNonAsyncExternalScriptInsertedRequests.isEmpty() &&
|
|
mXSLTRequests.isEmpty() && mDeferRequests.isEmpty() &&
|
|
MaybeRemovedDeferRequests()) {
|
|
return ProcessPendingRequests();
|
|
}
|
|
|
|
if (mDocumentParsingDone && mDocument &&
|
|
!mParserBlockingRequest && mLoadingAsyncRequests.isEmpty() &&
|
|
mLoadedAsyncRequests.isEmpty() &&
|
|
mNonAsyncExternalScriptInsertedRequests.isEmpty() &&
|
|
mXSLTRequests.isEmpty() && mDeferRequests.isEmpty()) {
|
|
// No more pending scripts; time to unblock onload.
|
|
// OK to unblock onload synchronously here, since callers must be
|
|
// prepared for the world changing anyway.
|
|
mDocumentParsingDone = false;
|
|
mDocument->UnblockOnload(true);
|
|
}
|
|
}
|
|
|
|
bool
|
|
nsScriptLoader::ReadyToExecuteParserBlockingScripts()
|
|
{
|
|
// Make sure the SelfReadyToExecuteParserBlockingScripts check is first, so
|
|
// that we don't block twice on an ancestor.
|
|
if (!SelfReadyToExecuteParserBlockingScripts()) {
|
|
return false;
|
|
}
|
|
|
|
for (nsIDocument* doc = mDocument; doc; doc = doc->GetParentDocument()) {
|
|
nsScriptLoader* ancestor = doc->ScriptLoader();
|
|
if (!ancestor->SelfReadyToExecuteParserBlockingScripts() &&
|
|
ancestor->AddPendingChildLoader(this)) {
|
|
AddParserBlockingScriptExecutionBlocker();
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (mDocument && !mDocument->IsMasterDocument()) {
|
|
RefPtr<ImportManager> im = mDocument->ImportManager();
|
|
RefPtr<ImportLoader> loader = im->Find(mDocument);
|
|
MOZ_ASSERT(loader, "How can we have an import document without a loader?");
|
|
|
|
// The referring link that counts in the execution order calculation
|
|
// (in spec: flagged as branch)
|
|
nsCOMPtr<nsINode> referrer = loader->GetMainReferrer();
|
|
MOZ_ASSERT(referrer, "There has to be a main referring link for each imports");
|
|
|
|
// Import documents are blocked by their import predecessors. We need to
|
|
// wait with script execution until all the predecessors are done.
|
|
// Technically it means we have to wait for the last one to finish,
|
|
// which is the neares one to us in the order.
|
|
RefPtr<ImportLoader> lastPred = im->GetNearestPredecessor(referrer);
|
|
if (!lastPred) {
|
|
// If there is no predecessor we can run.
|
|
return true;
|
|
}
|
|
|
|
nsCOMPtr<nsIDocument> doc = lastPred->GetDocument();
|
|
if (lastPred->IsBlocking() || !doc ||
|
|
!doc->ScriptLoader()->SelfReadyToExecuteParserBlockingScripts()) {
|
|
// Document has not been created yet or it was created but not ready.
|
|
// Either case we are blocked by it. The ImportLoader will take care
|
|
// of blocking us, and adding the pending child loader to the blocking
|
|
// ScriptLoader when it's possible (at this point the blocking loader
|
|
// might not have created the document/ScriptLoader)
|
|
lastPred->AddBlockedScriptLoader(this);
|
|
// As more imports are parsed, this can change, let's cache what we
|
|
// blocked, so it can be later updated if needed (see: ImportLoader::Updater).
|
|
loader->SetBlockingPredecessor(lastPred);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// This function was copied from nsParser.cpp. It was simplified a bit.
|
|
static bool
|
|
DetectByteOrderMark(const unsigned char* aBytes, int32_t aLen, nsCString& oCharset)
|
|
{
|
|
if (aLen < 2)
|
|
return false;
|
|
|
|
switch(aBytes[0]) {
|
|
case 0xEF:
|
|
if (aLen >= 3 && 0xBB == aBytes[1] && 0xBF == aBytes[2]) {
|
|
// EF BB BF
|
|
// Win2K UTF-8 BOM
|
|
oCharset.AssignLiteral("UTF-8");
|
|
}
|
|
break;
|
|
case 0xFE:
|
|
if (0xFF == aBytes[1]) {
|
|
// FE FF
|
|
// UTF-16, big-endian
|
|
oCharset.AssignLiteral("UTF-16BE");
|
|
}
|
|
break;
|
|
case 0xFF:
|
|
if (0xFE == aBytes[1]) {
|
|
// FF FE
|
|
// UTF-16, little-endian
|
|
oCharset.AssignLiteral("UTF-16LE");
|
|
}
|
|
break;
|
|
}
|
|
return !oCharset.IsEmpty();
|
|
}
|
|
|
|
/* static */ nsresult
|
|
nsScriptLoader::ConvertToUTF16(nsIChannel* aChannel, const uint8_t* aData,
|
|
uint32_t aLength, const nsAString& aHintCharset,
|
|
nsIDocument* aDocument,
|
|
char16_t*& aBufOut, size_t& aLengthOut)
|
|
{
|
|
if (!aLength) {
|
|
aBufOut = nullptr;
|
|
aLengthOut = 0;
|
|
return NS_OK;
|
|
}
|
|
|
|
// The encoding info precedence is as follows from high to low:
|
|
// The BOM
|
|
// HTTP Content-Type (if name recognized)
|
|
// charset attribute (if name recognized)
|
|
// The encoding of the document
|
|
|
|
nsAutoCString charset;
|
|
|
|
nsCOMPtr<nsIUnicodeDecoder> unicodeDecoder;
|
|
|
|
if (DetectByteOrderMark(aData, aLength, charset)) {
|
|
// charset is now "UTF-8" or "UTF-16". The UTF-16 decoder will re-sniff
|
|
// the BOM for endianness. Both the UTF-16 and the UTF-8 decoder will
|
|
// take care of swallowing the BOM.
|
|
unicodeDecoder = EncodingUtils::DecoderForEncoding(charset);
|
|
}
|
|
|
|
if (!unicodeDecoder &&
|
|
aChannel &&
|
|
NS_SUCCEEDED(aChannel->GetContentCharset(charset)) &&
|
|
EncodingUtils::FindEncodingForLabel(charset, charset)) {
|
|
unicodeDecoder = EncodingUtils::DecoderForEncoding(charset);
|
|
}
|
|
|
|
if (!unicodeDecoder &&
|
|
EncodingUtils::FindEncodingForLabel(aHintCharset, charset)) {
|
|
unicodeDecoder = EncodingUtils::DecoderForEncoding(charset);
|
|
}
|
|
|
|
if (!unicodeDecoder && aDocument) {
|
|
charset = aDocument->GetDocumentCharacterSet();
|
|
unicodeDecoder = EncodingUtils::DecoderForEncoding(charset);
|
|
}
|
|
|
|
if (!unicodeDecoder) {
|
|
// Curiously, there are various callers that don't pass aDocument. The
|
|
// fallback in the old code was ISO-8859-1, which behaved like
|
|
// windows-1252. Saying windows-1252 for clarity and for compliance
|
|
// with the Encoding Standard.
|
|
unicodeDecoder = EncodingUtils::DecoderForEncoding("windows-1252");
|
|
}
|
|
|
|
int32_t unicodeLength = 0;
|
|
|
|
nsresult rv =
|
|
unicodeDecoder->GetMaxLength(reinterpret_cast<const char*>(aData),
|
|
aLength, &unicodeLength);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
aBufOut = static_cast<char16_t*>(js_malloc(unicodeLength * sizeof(char16_t)));
|
|
if (!aBufOut) {
|
|
aLengthOut = 0;
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
aLengthOut = unicodeLength;
|
|
|
|
rv = unicodeDecoder->Convert(reinterpret_cast<const char*>(aData),
|
|
(int32_t *) &aLength, aBufOut,
|
|
&unicodeLength);
|
|
MOZ_ASSERT(NS_SUCCEEDED(rv));
|
|
aLengthOut = unicodeLength;
|
|
if (NS_FAILED(rv)) {
|
|
js_free(aBufOut);
|
|
aBufOut = nullptr;
|
|
aLengthOut = 0;
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
nsScriptLoader::OnStreamComplete(nsIIncrementalStreamLoader* aLoader,
|
|
nsISupports* aContext,
|
|
nsresult aChannelStatus,
|
|
nsresult aSRIStatus,
|
|
mozilla::Vector<char16_t> &aString,
|
|
mozilla::dom::SRICheckDataVerifier* aSRIDataVerifier)
|
|
{
|
|
nsScriptLoadRequest* request = static_cast<nsScriptLoadRequest*>(aContext);
|
|
NS_ASSERTION(request, "null request in stream complete handler");
|
|
NS_ENSURE_TRUE(request, NS_ERROR_FAILURE);
|
|
|
|
nsCOMPtr<nsIRequest> channelRequest;
|
|
aLoader->GetRequest(getter_AddRefs(channelRequest));
|
|
nsCOMPtr<nsIChannel> channel;
|
|
channel = do_QueryInterface(channelRequest);
|
|
|
|
nsresult rv = NS_OK;
|
|
if (!request->mIntegrity.IsEmpty() &&
|
|
NS_SUCCEEDED((rv = aSRIStatus))) {
|
|
MOZ_ASSERT(aSRIDataVerifier);
|
|
MOZ_ASSERT(mReporter);
|
|
|
|
nsAutoCString sourceUri;
|
|
if (mDocument && mDocument->GetDocumentURI()) {
|
|
mDocument->GetDocumentURI()->GetAsciiSpec(sourceUri);
|
|
}
|
|
rv = aSRIDataVerifier->Verify(request->mIntegrity, channel, sourceUri,
|
|
mReporter);
|
|
mReporter->FlushConsoleReports(mDocument);
|
|
if (NS_FAILED(rv)) {
|
|
rv = NS_ERROR_SRI_CORRUPT;
|
|
}
|
|
} else {
|
|
nsCOMPtr<nsILoadInfo> loadInfo = channel->GetLoadInfo();
|
|
|
|
if (loadInfo->GetEnforceSRI()) {
|
|
MOZ_LOG(SRILogHelper::GetSriLog(), mozilla::LogLevel::Debug,
|
|
("nsScriptLoader::OnStreamComplete, required SRI not found"));
|
|
nsCOMPtr<nsIContentSecurityPolicy> csp;
|
|
loadInfo->LoadingPrincipal()->GetCsp(getter_AddRefs(csp));
|
|
nsAutoCString violationURISpec;
|
|
mDocument->GetDocumentURI()->GetAsciiSpec(violationURISpec);
|
|
uint32_t lineNo = request->mElement ? request->mElement->GetScriptLineNumber() : 0;
|
|
csp->LogViolationDetails(
|
|
nsIContentSecurityPolicy::VIOLATION_TYPE_REQUIRE_SRI_FOR_SCRIPT,
|
|
NS_ConvertUTF8toUTF16(violationURISpec),
|
|
EmptyString(), lineNo, EmptyString(), EmptyString());
|
|
rv = NS_ERROR_SRI_CORRUPT;
|
|
}
|
|
}
|
|
|
|
if (NS_SUCCEEDED(rv)) {
|
|
rv = PrepareLoadedRequest(request, aLoader, aChannelStatus, aString);
|
|
}
|
|
|
|
if (NS_FAILED(rv)) {
|
|
/*
|
|
* Handle script not loading error because source was a tracking URL.
|
|
* We make a note of this script node by including it in a dedicated
|
|
* array of blocked tracking nodes under its parent document.
|
|
*/
|
|
if (rv == NS_ERROR_TRACKING_URI) {
|
|
nsCOMPtr<nsIContent> cont = do_QueryInterface(request->mElement);
|
|
mDocument->AddBlockedTrackingNode(cont);
|
|
}
|
|
|
|
if (request->mIsDefer) {
|
|
MOZ_ASSERT_IF(request->IsModuleRequest(),
|
|
request->AsModuleRequest()->IsTopLevel());
|
|
if (request->isInList()) {
|
|
RefPtr<nsScriptLoadRequest> req = mDeferRequests.Steal(request);
|
|
FireScriptAvailable(rv, req);
|
|
}
|
|
} else if (request->mIsAsync) {
|
|
MOZ_ASSERT_IF(request->IsModuleRequest(),
|
|
request->AsModuleRequest()->IsTopLevel());
|
|
if (request->isInList()) {
|
|
RefPtr<nsScriptLoadRequest> req = mLoadingAsyncRequests.Steal(request);
|
|
FireScriptAvailable(rv, req);
|
|
}
|
|
} else if (request->mIsNonAsyncScriptInserted) {
|
|
if (request->isInList()) {
|
|
RefPtr<nsScriptLoadRequest> req =
|
|
mNonAsyncExternalScriptInsertedRequests.Steal(request);
|
|
FireScriptAvailable(rv, req);
|
|
}
|
|
} else if (request->mIsXSLT) {
|
|
if (request->isInList()) {
|
|
RefPtr<nsScriptLoadRequest> req = mXSLTRequests.Steal(request);
|
|
FireScriptAvailable(rv, req);
|
|
}
|
|
} else if (request->IsModuleRequest()) {
|
|
nsModuleLoadRequest* modReq = request->AsModuleRequest();
|
|
MOZ_ASSERT(!modReq->IsTopLevel());
|
|
MOZ_ASSERT(!modReq->isInList());
|
|
modReq->Cancel();
|
|
FireScriptAvailable(rv, request);
|
|
} else if (mParserBlockingRequest == request) {
|
|
MOZ_ASSERT(!request->isInList());
|
|
mParserBlockingRequest = nullptr;
|
|
UnblockParser(request);
|
|
|
|
// Ensure that we treat request->mElement as our current parser-inserted
|
|
// script while firing onerror on it.
|
|
MOZ_ASSERT(request->mElement->GetParserCreated());
|
|
nsCOMPtr<nsIScriptElement> oldParserInsertedScript =
|
|
mCurrentParserInsertedScript;
|
|
mCurrentParserInsertedScript = request->mElement;
|
|
FireScriptAvailable(rv, request);
|
|
ContinueParserAsync(request);
|
|
mCurrentParserInsertedScript = oldParserInsertedScript;
|
|
} else {
|
|
mPreloads.RemoveElement(request, PreloadRequestComparator());
|
|
}
|
|
}
|
|
|
|
// Process our request and/or any pending ones
|
|
ProcessPendingRequests();
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsScriptLoader::UnblockParser(nsScriptLoadRequest* aParserBlockingRequest)
|
|
{
|
|
aParserBlockingRequest->mElement->UnblockParser();
|
|
}
|
|
|
|
void
|
|
nsScriptLoader::ContinueParserAsync(nsScriptLoadRequest* aParserBlockingRequest)
|
|
{
|
|
aParserBlockingRequest->mElement->ContinueParserAsync();
|
|
}
|
|
|
|
uint32_t
|
|
nsScriptLoader::NumberOfProcessors()
|
|
{
|
|
if (mNumberOfProcessors > 0)
|
|
return mNumberOfProcessors;
|
|
|
|
int32_t numProcs = PR_GetNumberOfProcessors();
|
|
if (numProcs > 0)
|
|
mNumberOfProcessors = numProcs;
|
|
return mNumberOfProcessors;
|
|
}
|
|
|
|
void
|
|
nsScriptLoader::MaybeMoveToLoadedList(nsScriptLoadRequest* aRequest)
|
|
{
|
|
MOZ_ASSERT(aRequest->IsReadyToRun());
|
|
|
|
// If it's async, move it to the loaded list. aRequest->mIsAsync really
|
|
// _should_ be in a list, but the consequences if it's not are bad enough we
|
|
// want to avoid trying to move it if it's not.
|
|
if (aRequest->mIsAsync) {
|
|
MOZ_ASSERT(aRequest->isInList());
|
|
if (aRequest->isInList()) {
|
|
RefPtr<nsScriptLoadRequest> req = mLoadingAsyncRequests.Steal(aRequest);
|
|
mLoadedAsyncRequests.AppendElement(req);
|
|
}
|
|
}
|
|
}
|
|
|
|
nsresult
|
|
nsScriptLoader::PrepareLoadedRequest(nsScriptLoadRequest* aRequest,
|
|
nsIIncrementalStreamLoader* aLoader,
|
|
nsresult aStatus,
|
|
mozilla::Vector<char16_t> &aString)
|
|
{
|
|
if (NS_FAILED(aStatus)) {
|
|
return aStatus;
|
|
}
|
|
|
|
if (aRequest->IsCanceled()) {
|
|
return NS_BINDING_ABORTED;
|
|
}
|
|
|
|
// If we don't have a document, then we need to abort further
|
|
// evaluation.
|
|
if (!mDocument) {
|
|
return NS_ERROR_NOT_AVAILABLE;
|
|
}
|
|
|
|
// If the load returned an error page, then we need to abort
|
|
nsCOMPtr<nsIRequest> req;
|
|
nsresult rv = aLoader->GetRequest(getter_AddRefs(req));
|
|
NS_ASSERTION(req, "StreamLoader's request went away prematurely");
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(req);
|
|
if (httpChannel) {
|
|
bool requestSucceeded;
|
|
rv = httpChannel->GetRequestSucceeded(&requestSucceeded);
|
|
if (NS_SUCCEEDED(rv) && !requestSucceeded) {
|
|
return NS_ERROR_NOT_AVAILABLE;
|
|
}
|
|
|
|
nsAutoCString sourceMapURL;
|
|
rv = httpChannel->GetResponseHeader(NS_LITERAL_CSTRING("X-SourceMap"), sourceMapURL);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
aRequest->mHasSourceMapURL = true;
|
|
aRequest->mSourceMapURL = NS_ConvertUTF8toUTF16(sourceMapURL);
|
|
}
|
|
}
|
|
|
|
nsCOMPtr<nsIChannel> channel = do_QueryInterface(req);
|
|
// If this load was subject to a CORS check; don't flag it with a
|
|
// separate origin principal, so that it will treat our document's
|
|
// principal as the origin principal
|
|
if (aRequest->mCORSMode == CORS_NONE) {
|
|
rv = nsContentUtils::GetSecurityManager()->
|
|
GetChannelResultPrincipal(channel, getter_AddRefs(aRequest->mOriginPrincipal));
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
}
|
|
|
|
if (!aString.empty()) {
|
|
aRequest->mScriptTextLength = aString.length();
|
|
aRequest->mScriptTextBuf = aString.extractOrCopyRawBuffer();
|
|
}
|
|
|
|
// This assertion could fire errorously if we ran out of memory when
|
|
// inserting the request in the array. However it's an unlikely case
|
|
// so if you see this assertion it is likely something else that is
|
|
// wrong, especially if you see it more than once.
|
|
NS_ASSERTION(mDeferRequests.Contains(aRequest) ||
|
|
mLoadingAsyncRequests.Contains(aRequest) ||
|
|
mNonAsyncExternalScriptInsertedRequests.Contains(aRequest) ||
|
|
mXSLTRequests.Contains(aRequest) ||
|
|
(aRequest->IsModuleRequest() &&
|
|
!aRequest->AsModuleRequest()->IsTopLevel() &&
|
|
!aRequest->isInList()) ||
|
|
mPreloads.Contains(aRequest, PreloadRequestComparator()) ||
|
|
mParserBlockingRequest,
|
|
"aRequest should be pending!");
|
|
|
|
if (aRequest->IsModuleRequest()) {
|
|
nsModuleLoadRequest* request = aRequest->AsModuleRequest();
|
|
|
|
// When loading a module, only responses with a JavaScript MIME type are
|
|
// acceptable.
|
|
nsAutoCString mimeType;
|
|
channel->GetContentType(mimeType);
|
|
NS_ConvertUTF8toUTF16 typeString(mimeType);
|
|
if (!nsContentUtils::IsJavascriptMIMEType(typeString)) {
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
|
|
channel->GetURI(getter_AddRefs(request->mBaseURL));
|
|
|
|
// Attempt to compile off main thread.
|
|
rv = AttemptAsyncScriptCompile(request);
|
|
if (NS_SUCCEEDED(rv)) {
|
|
return rv;
|
|
}
|
|
|
|
// Otherwise compile it right away and start fetching descendents.
|
|
return ProcessFetchedModuleSource(request);
|
|
}
|
|
|
|
// The script is now loaded and ready to run.
|
|
aRequest->SetReady();
|
|
|
|
// If this is currently blocking the parser, attempt to compile it off-main-thread.
|
|
if (aRequest == mParserBlockingRequest && (NumberOfProcessors() > 1)) {
|
|
MOZ_ASSERT(!aRequest->IsModuleRequest());
|
|
nsresult rv = AttemptAsyncScriptCompile(aRequest);
|
|
if (rv == NS_OK) {
|
|
MOZ_ASSERT(aRequest->mProgress == nsScriptLoadRequest::Progress::Compiling,
|
|
"Request should be off-thread compiling now.");
|
|
return NS_OK;
|
|
}
|
|
|
|
// If off-thread compile errored, return the error.
|
|
if (rv != NS_ERROR_FAILURE) {
|
|
return rv;
|
|
}
|
|
|
|
// If off-thread compile was rejected, continue with regular processing.
|
|
}
|
|
|
|
MaybeMoveToLoadedList(aRequest);
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
void
|
|
nsScriptLoader::ParsingComplete(bool aTerminated)
|
|
{
|
|
if (mDeferEnabled) {
|
|
// Have to check because we apparently get ParsingComplete
|
|
// without BeginDeferringScripts in some cases
|
|
mDocumentParsingDone = true;
|
|
}
|
|
mDeferEnabled = false;
|
|
if (aTerminated) {
|
|
mDeferRequests.Clear();
|
|
mLoadingAsyncRequests.Clear();
|
|
mLoadedAsyncRequests.Clear();
|
|
mNonAsyncExternalScriptInsertedRequests.Clear();
|
|
mXSLTRequests.Clear();
|
|
if (mParserBlockingRequest) {
|
|
mParserBlockingRequest->Cancel();
|
|
mParserBlockingRequest = nullptr;
|
|
}
|
|
}
|
|
|
|
// Have to call this even if aTerminated so we'll correctly unblock
|
|
// onload and all.
|
|
ProcessPendingRequests();
|
|
}
|
|
|
|
void
|
|
nsScriptLoader::PreloadURI(nsIURI *aURI, const nsAString &aCharset,
|
|
const nsAString &aType,
|
|
const nsAString &aCrossOrigin,
|
|
const nsAString& aIntegrity,
|
|
bool aScriptFromHead,
|
|
const mozilla::net::ReferrerPolicy aReferrerPolicy)
|
|
{
|
|
NS_ENSURE_TRUE_VOID(mDocument);
|
|
// Check to see if scripts has been turned off.
|
|
if (!mEnabled || !mDocument->IsScriptEnabled()) {
|
|
return;
|
|
}
|
|
|
|
// TODO: Preload module scripts.
|
|
if (nsContentUtils::IsChromeDoc(mDocument) && aType.LowerCaseEqualsASCII("module")) {
|
|
return;
|
|
}
|
|
|
|
SRIMetadata sriMetadata;
|
|
if (!aIntegrity.IsEmpty()) {
|
|
MOZ_LOG(SRILogHelper::GetSriLog(), mozilla::LogLevel::Debug,
|
|
("nsScriptLoader::PreloadURI, integrity=%s",
|
|
NS_ConvertUTF16toUTF8(aIntegrity).get()));
|
|
nsAutoCString sourceUri;
|
|
if (mDocument->GetDocumentURI()) {
|
|
mDocument->GetDocumentURI()->GetAsciiSpec(sourceUri);
|
|
}
|
|
SRICheck::IntegrityMetadata(aIntegrity, sourceUri, mReporter, &sriMetadata);
|
|
}
|
|
|
|
RefPtr<nsScriptLoadRequest> request =
|
|
CreateLoadRequest(nsScriptKind::Classic, nullptr, 0,
|
|
Element::StringToCORSMode(aCrossOrigin), sriMetadata);
|
|
request->mURI = aURI;
|
|
request->mIsInline = false;
|
|
request->mReferrerPolicy = aReferrerPolicy;
|
|
|
|
nsresult rv = StartLoad(request, aType, aScriptFromHead);
|
|
if (NS_FAILED(rv)) {
|
|
return;
|
|
}
|
|
|
|
PreloadInfo *pi = mPreloads.AppendElement();
|
|
pi->mRequest = request;
|
|
pi->mCharset = aCharset;
|
|
}
|
|
|
|
void
|
|
nsScriptLoader::AddDeferRequest(nsScriptLoadRequest* aRequest)
|
|
{
|
|
aRequest->mIsDefer = true;
|
|
mDeferRequests.AppendElement(aRequest);
|
|
if (mDeferEnabled && aRequest == mDeferRequests.getFirst() &&
|
|
mDocument && !mBlockingDOMContentLoaded) {
|
|
MOZ_ASSERT(mDocument->GetReadyStateEnum() == nsIDocument::READYSTATE_LOADING);
|
|
mBlockingDOMContentLoaded = true;
|
|
mDocument->BlockDOMContentLoaded();
|
|
}
|
|
}
|
|
|
|
bool
|
|
nsScriptLoader::MaybeRemovedDeferRequests()
|
|
{
|
|
if (mDeferRequests.isEmpty() && mDocument &&
|
|
mBlockingDOMContentLoaded) {
|
|
mBlockingDOMContentLoaded = false;
|
|
mDocument->UnblockDOMContentLoaded();
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
//////////////////////////////////////////////////////////////
|
|
// nsScriptLoadHandler
|
|
//////////////////////////////////////////////////////////////
|
|
|
|
nsScriptLoadHandler::nsScriptLoadHandler(nsScriptLoader *aScriptLoader,
|
|
nsScriptLoadRequest *aRequest,
|
|
mozilla::dom::SRICheckDataVerifier *aSRIDataVerifier)
|
|
: mScriptLoader(aScriptLoader),
|
|
mRequest(aRequest),
|
|
mSRIDataVerifier(aSRIDataVerifier),
|
|
mSRIStatus(NS_OK),
|
|
mDecoder(),
|
|
mBuffer()
|
|
{}
|
|
|
|
nsScriptLoadHandler::~nsScriptLoadHandler()
|
|
{}
|
|
|
|
NS_IMPL_ISUPPORTS(nsScriptLoadHandler, nsIIncrementalStreamLoaderObserver)
|
|
|
|
NS_IMETHODIMP
|
|
nsScriptLoadHandler::OnIncrementalData(nsIIncrementalStreamLoader* aLoader,
|
|
nsISupports* aContext,
|
|
uint32_t aDataLength,
|
|
const uint8_t* aData,
|
|
uint32_t *aConsumedLength)
|
|
{
|
|
if (mRequest->IsCanceled()) {
|
|
// If request cancelled, ignore any incoming data.
|
|
*aConsumedLength = aDataLength;
|
|
return NS_OK;
|
|
}
|
|
|
|
if (!EnsureDecoder(aLoader, aData, aDataLength,
|
|
/* aEndOfStream = */ false)) {
|
|
return NS_OK;
|
|
}
|
|
|
|
// Below we will/shall consume entire data chunk.
|
|
*aConsumedLength = aDataLength;
|
|
|
|
// Decoder has already been initialized. -- trying to decode all loaded bytes.
|
|
nsresult rv = TryDecodeRawData(aData, aDataLength,
|
|
/* aEndOfStream = */ false);
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
// If SRI is required for this load, appending new bytes to the hash.
|
|
if (mSRIDataVerifier && NS_SUCCEEDED(mSRIStatus)) {
|
|
mSRIStatus = mSRIDataVerifier->Update(aDataLength, aData);
|
|
}
|
|
|
|
return rv;
|
|
}
|
|
|
|
nsresult
|
|
nsScriptLoadHandler::TryDecodeRawData(const uint8_t* aData,
|
|
uint32_t aDataLength,
|
|
bool aEndOfStream)
|
|
{
|
|
int32_t srcLen = aDataLength;
|
|
const char* src = reinterpret_cast<const char *>(aData);
|
|
int32_t dstLen;
|
|
nsresult rv =
|
|
mDecoder->GetMaxLength(src, srcLen, &dstLen);
|
|
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
uint32_t haveRead = mBuffer.length();
|
|
uint32_t capacity = haveRead + dstLen;
|
|
if (!mBuffer.reserve(capacity)) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
|
|
rv = mDecoder->Convert(src,
|
|
&srcLen,
|
|
mBuffer.begin() + haveRead,
|
|
&dstLen);
|
|
|
|
NS_ENSURE_SUCCESS(rv, rv);
|
|
|
|
haveRead += dstLen;
|
|
MOZ_ASSERT(haveRead <= capacity, "mDecoder produced more data than expected");
|
|
MOZ_ALWAYS_TRUE(mBuffer.resizeUninitialized(haveRead));
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
bool
|
|
nsScriptLoadHandler::EnsureDecoder(nsIIncrementalStreamLoader *aLoader,
|
|
const uint8_t* aData,
|
|
uint32_t aDataLength,
|
|
bool aEndOfStream)
|
|
{
|
|
// Check if decoder has already been created.
|
|
if (mDecoder) {
|
|
return true;
|
|
}
|
|
|
|
nsAutoCString charset;
|
|
|
|
// JavaScript modules are always UTF-8.
|
|
if (mRequest->IsModuleRequest()) {
|
|
charset = "UTF-8";
|
|
mDecoder = EncodingUtils::DecoderForEncoding(charset);
|
|
return true;
|
|
}
|
|
|
|
// Determine if BOM check should be done. This occurs either
|
|
// if end-of-stream has been reached, or at least 3 bytes have
|
|
// been read from input.
|
|
if (!aEndOfStream && (aDataLength < 3)) {
|
|
return false;
|
|
}
|
|
|
|
// Do BOM detection.
|
|
if (DetectByteOrderMark(aData, aDataLength, charset)) {
|
|
mDecoder = EncodingUtils::DecoderForEncoding(charset);
|
|
return true;
|
|
}
|
|
|
|
// BOM detection failed, check content stream for charset.
|
|
nsCOMPtr<nsIRequest> req;
|
|
nsresult rv = aLoader->GetRequest(getter_AddRefs(req));
|
|
NS_ASSERTION(req, "StreamLoader's request went away prematurely");
|
|
NS_ENSURE_SUCCESS(rv, false);
|
|
|
|
nsCOMPtr<nsIChannel> channel = do_QueryInterface(req);
|
|
|
|
if (channel &&
|
|
NS_SUCCEEDED(channel->GetContentCharset(charset)) &&
|
|
EncodingUtils::FindEncodingForLabel(charset, charset)) {
|
|
mDecoder = EncodingUtils::DecoderForEncoding(charset);
|
|
return true;
|
|
}
|
|
|
|
// Check the hint charset from the script element or preload
|
|
// request.
|
|
nsAutoString hintCharset;
|
|
if (!mRequest->IsPreload()) {
|
|
mRequest->mElement->GetScriptCharset(hintCharset);
|
|
} else {
|
|
nsTArray<nsScriptLoader::PreloadInfo>::index_type i =
|
|
mScriptLoader->mPreloads.IndexOf(mRequest, 0,
|
|
nsScriptLoader::PreloadRequestComparator());
|
|
|
|
NS_ASSERTION(i != mScriptLoader->mPreloads.NoIndex,
|
|
"Incorrect preload bookkeeping");
|
|
hintCharset = mScriptLoader->mPreloads[i].mCharset;
|
|
}
|
|
|
|
if (EncodingUtils::FindEncodingForLabel(hintCharset, charset)) {
|
|
mDecoder = EncodingUtils::DecoderForEncoding(charset);
|
|
return true;
|
|
}
|
|
|
|
// Get the charset from the charset of the document.
|
|
if (mScriptLoader->mDocument) {
|
|
charset = mScriptLoader->mDocument->GetDocumentCharacterSet();
|
|
mDecoder = EncodingUtils::DecoderForEncoding(charset);
|
|
return true;
|
|
}
|
|
|
|
// Curiously, there are various callers that don't pass aDocument. The
|
|
// fallback in the old code was ISO-8859-1, which behaved like
|
|
// windows-1252. Saying windows-1252 for clarity and for compliance
|
|
// with the Encoding Standard.
|
|
charset = "windows-1252";
|
|
mDecoder = EncodingUtils::DecoderForEncoding(charset);
|
|
return true;
|
|
}
|
|
|
|
NS_IMETHODIMP
|
|
nsScriptLoadHandler::OnStreamComplete(nsIIncrementalStreamLoader* aLoader,
|
|
nsISupports* aContext,
|
|
nsresult aStatus,
|
|
uint32_t aDataLength,
|
|
const uint8_t* aData)
|
|
{
|
|
if (!mRequest->IsCanceled()) {
|
|
DebugOnly<bool> encoderSet =
|
|
EnsureDecoder(aLoader, aData, aDataLength, /* aEndOfStream = */ true);
|
|
MOZ_ASSERT(encoderSet);
|
|
DebugOnly<nsresult> rv = TryDecodeRawData(aData, aDataLength,
|
|
/* aEndOfStream = */ true);
|
|
|
|
// If SRI is required for this load, appending new bytes to the hash.
|
|
if (mSRIDataVerifier && NS_SUCCEEDED(mSRIStatus)) {
|
|
mSRIStatus = mSRIDataVerifier->Update(aDataLength, aData);
|
|
}
|
|
}
|
|
|
|
// we have to mediate and use mRequest.
|
|
return mScriptLoader->OnStreamComplete(aLoader, mRequest, aStatus, mSRIStatus,
|
|
mBuffer, mSRIDataVerifier);
|
|
}
|