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gecko-dev/dom/workers/ScriptLoader.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "ScriptLoader.h"
#include "nsIChannel.h"
#include "nsIContentPolicy.h"
#include "nsIContentSecurityPolicy.h"
#include "nsIHttpChannel.h"
#include "nsIInputStreamPump.h"
#include "nsIIOService.h"
#include "nsIProtocolHandler.h"
#include "nsIScriptSecurityManager.h"
#include "nsISerializable.h"
#include "nsIStreamLoader.h"
#include "nsIStreamListenerTee.h"
#include "nsIThreadRetargetableRequest.h"
#include "nsIURI.h"
#include "jsapi.h"
#include "nsError.h"
#include "nsContentPolicyUtils.h"
#include "nsContentUtils.h"
#include "nsDocShellCID.h"
#include "nsISupportsPrimitives.h"
#include "nsNetUtil.h"
#include "nsScriptLoader.h"
#include "nsString.h"
#include "nsStreamUtils.h"
#include "nsTArray.h"
#include "nsThreadUtils.h"
#include "nsXPCOM.h"
#include "xpcpublic.h"
#include "mozilla/Assertions.h"
#include "mozilla/LoadContext.h"
#include "mozilla/ipc/BackgroundUtils.h"
#include "mozilla/dom/CacheBinding.h"
#include "mozilla/dom/cache/Cache.h"
#include "mozilla/dom/cache/CacheStorage.h"
#include "mozilla/dom/Exceptions.h"
#include "mozilla/dom/InternalResponse.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/Response.h"
#include "Principal.h"
#include "WorkerFeature.h"
#include "WorkerPrivate.h"
#include "WorkerRunnable.h"
#define MAX_CONCURRENT_SCRIPTS 1000
USING_WORKERS_NAMESPACE
using mozilla::dom::cache::Cache;
using mozilla::dom::cache::CacheStorage;
using mozilla::dom::Promise;
using mozilla::dom::PromiseNativeHandler;
using mozilla::dom::workers::exceptions::ThrowDOMExceptionForNSResult;
namespace {
nsIURI*
GetBaseURI(bool aIsMainScript, WorkerPrivate* aWorkerPrivate)
{
MOZ_ASSERT(aWorkerPrivate);
nsIURI* baseURI;
WorkerPrivate* parentWorker = aWorkerPrivate->GetParent();
if (aIsMainScript) {
if (parentWorker) {
baseURI = parentWorker->GetBaseURI();
NS_ASSERTION(baseURI, "Should have been set already!");
}
else {
// May be null.
baseURI = aWorkerPrivate->GetBaseURI();
}
}
else {
baseURI = aWorkerPrivate->GetBaseURI();
NS_ASSERTION(baseURI, "Should have been set already!");
}
return baseURI;
}
nsresult
ChannelFromScriptURL(nsIPrincipal* principal,
nsIURI* baseURI,
nsIDocument* parentDoc,
nsILoadGroup* loadGroup,
nsIIOService* ios,
nsIScriptSecurityManager* secMan,
const nsAString& aScriptURL,
bool aIsMainScript,
WorkerScriptType aWorkerScriptType,
nsIChannel** aChannel)
{
AssertIsOnMainThread();
nsresult rv;
nsCOMPtr<nsIURI> uri;
rv = nsContentUtils::NewURIWithDocumentCharset(getter_AddRefs(uri),
aScriptURL, parentDoc,
baseURI);
if (NS_FAILED(rv)) {
return NS_ERROR_DOM_SYNTAX_ERR;
}
// If we're part of a document then check the content load policy.
if (parentDoc) {
int16_t shouldLoad = nsIContentPolicy::ACCEPT;
rv = NS_CheckContentLoadPolicy(nsIContentPolicy::TYPE_SCRIPT, uri,
principal, parentDoc,
NS_LITERAL_CSTRING("text/javascript"),
nullptr, &shouldLoad,
nsContentUtils::GetContentPolicy(),
secMan);
if (NS_FAILED(rv) || NS_CP_REJECTED(shouldLoad)) {
if (NS_FAILED(rv) || shouldLoad != nsIContentPolicy::REJECT_TYPE) {
return rv = NS_ERROR_CONTENT_BLOCKED;
}
return rv = NS_ERROR_CONTENT_BLOCKED_SHOW_ALT;
}
}
if (aWorkerScriptType == DebuggerScript) {
bool isChrome = false;
NS_ENSURE_SUCCESS(uri->SchemeIs("chrome", &isChrome),
NS_ERROR_DOM_SECURITY_ERR);
bool isResource = false;
NS_ENSURE_SUCCESS(uri->SchemeIs("resource", &isResource),
NS_ERROR_DOM_SECURITY_ERR);
if (!isChrome && !isResource) {
return NS_ERROR_DOM_SECURITY_ERR;
}
} else if (aIsMainScript) {
// If this script loader is being used to make a new worker then we need
// to do a same-origin check. Otherwise we need to clear the load with the
// security manager.
nsCString scheme;
rv = uri->GetScheme(scheme);
NS_ENSURE_SUCCESS(rv, rv);
// We pass true as the 3rd argument to checkMayLoad here.
// This allows workers in sandboxed documents to load data URLs
// (and other URLs that inherit their principal from their
// creator.)
rv = principal->CheckMayLoad(uri, false, true);
NS_ENSURE_SUCCESS(rv, NS_ERROR_DOM_SECURITY_ERR);
}
else {
rv = secMan->CheckLoadURIWithPrincipal(principal, uri, 0);
NS_ENSURE_SUCCESS(rv, NS_ERROR_DOM_SECURITY_ERR);
}
uint32_t flags = nsIRequest::LOAD_NORMAL | nsIChannel::LOAD_CLASSIFY_URI;
nsCOMPtr<nsIChannel> channel;
// If we have the document, use it
if (parentDoc) {
rv = NS_NewChannel(getter_AddRefs(channel),
uri,
parentDoc,
nsILoadInfo::SEC_NORMAL,
nsIContentPolicy::TYPE_SCRIPT,
loadGroup,
nullptr, // aCallbacks
flags,
ios);
} else {
// We must have a loadGroup with a load context for the principal to
// traverse the channel correctly.
MOZ_ASSERT(loadGroup);
MOZ_ASSERT(NS_LoadGroupMatchesPrincipal(loadGroup, principal));
rv = NS_NewChannel(getter_AddRefs(channel),
uri,
principal,
nsILoadInfo::SEC_NORMAL,
nsIContentPolicy::TYPE_SCRIPT,
loadGroup,
nullptr, // aCallbacks
flags,
ios);
}
NS_ENSURE_SUCCESS(rv, rv);
channel.forget(aChannel);
return rv;
}
struct ScriptLoadInfo
{
ScriptLoadInfo()
: mScriptTextBuf(nullptr)
, mScriptTextLength(0)
, mLoadResult(NS_ERROR_NOT_INITIALIZED)
, mLoadingFinished(false)
, mExecutionScheduled(false)
, mExecutionResult(false)
, mCacheStatus(Uncached)
{ }
~ScriptLoadInfo()
{
if (mScriptTextBuf) {
js_free(mScriptTextBuf);
}
}
bool
ReadyToExecute()
{
return !mChannel && NS_SUCCEEDED(mLoadResult) && !mExecutionScheduled;
}
nsString mURL;
// This full URL string is populated only if this object is used in a
// ServiceWorker.
nsString mFullURL;
// This promise is set only when the script is for a ServiceWorker but
// it's not in the cache yet. The promise is resolved when the full body is
// stored into the cache. mCachePromise will be set to nullptr after
// resolution.
nsRefPtr<Promise> mCachePromise;
nsCOMPtr<nsIChannel> mChannel;
char16_t* mScriptTextBuf;
size_t mScriptTextLength;
nsresult mLoadResult;
bool mLoadingFinished;
bool mExecutionScheduled;
bool mExecutionResult;
enum CacheStatus {
// By default a normal script is just loaded from the network. But for
// ServiceWorkers, we have to check if the cache contains the script and
// load it from the cache.
Uncached,
WritingToCache,
ReadingFromCache,
// This script has been loaded from the ServiceWorker cache.
Cached,
// This script must be stored in the ServiceWorker cache.
ToBeCached,
// Something went wrong or the worker went away.
Cancel
};
CacheStatus mCacheStatus;
bool Finished() const
{
return mLoadingFinished && !mCachePromise && !mChannel;
}
};
class ScriptLoaderRunnable;
class ScriptExecutorRunnable final : public MainThreadWorkerSyncRunnable
{
ScriptLoaderRunnable& mScriptLoader;
bool mIsWorkerScript;
uint32_t mFirstIndex;
uint32_t mLastIndex;
public:
ScriptExecutorRunnable(ScriptLoaderRunnable& aScriptLoader,
nsIEventTarget* aSyncLoopTarget,
bool aIsWorkerScript,
uint32_t aFirstIndex,
uint32_t aLastIndex);
private:
~ScriptExecutorRunnable()
{ }
virtual bool
IsDebuggerRunnable() const override;
virtual bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate) override;
virtual void
PostRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate, bool aRunResult)
override;
NS_DECL_NSICANCELABLERUNNABLE
void
ShutdownScriptLoader(JSContext* aCx,
WorkerPrivate* aWorkerPrivate,
bool aResult);
};
class CacheScriptLoader;
class CacheCreator final : public PromiseNativeHandler
{
public:
explicit CacheCreator(WorkerPrivate* aWorkerPrivate)
: mCacheName(aWorkerPrivate->ServiceWorkerCacheName())
{
MOZ_ASSERT(aWorkerPrivate->IsServiceWorker());
MOZ_ASSERT(aWorkerPrivate->LoadScriptAsPartOfLoadingServiceWorkerScript());
AssertIsOnMainThread();
}
void
AddLoader(CacheScriptLoader* aLoader)
{
AssertIsOnMainThread();
MOZ_ASSERT(!mCacheStorage);
mLoaders.AppendElement(aLoader);
}
virtual void
ResolvedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue) override;
virtual void
RejectedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue) override;
// Try to load from cache with aPrincipal used for cache access.
nsresult
Load(nsIPrincipal* aPrincipal);
Cache*
Cache_() const
{
AssertIsOnMainThread();
MOZ_ASSERT(mCache);
return mCache;
}
nsIGlobalObject*
Global() const
{
AssertIsOnMainThread();
MOZ_ASSERT(mSandboxGlobalObject);
return mSandboxGlobalObject;
}
void
DeleteCache();
private:
~CacheCreator()
{
}
nsresult
CreateCacheStorage(nsIPrincipal* aPrincipal);
void
FailLoaders(nsresult aRv);
nsRefPtr<Cache> mCache;
nsRefPtr<CacheStorage> mCacheStorage;
nsCOMPtr<nsIGlobalObject> mSandboxGlobalObject;
nsTArray<nsRefPtr<CacheScriptLoader>> mLoaders;
nsString mCacheName;
};
class CacheScriptLoader final : public PromiseNativeHandler
, public nsIStreamLoaderObserver
{
public:
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_NSISTREAMLOADEROBSERVER
CacheScriptLoader(WorkerPrivate* aWorkerPrivate, ScriptLoadInfo& aLoadInfo,
uint32_t aIndex, bool aIsWorkerScript,
ScriptLoaderRunnable* aRunnable)
: mLoadInfo(aLoadInfo)
, mIndex(aIndex)
, mRunnable(aRunnable)
, mIsWorkerScript(aIsWorkerScript)
, mFailed(false)
{
MOZ_ASSERT(aWorkerPrivate->IsServiceWorker());
mBaseURI = GetBaseURI(mIsWorkerScript, aWorkerPrivate);
AssertIsOnMainThread();
}
void
Fail(nsresult aRv);
void
Load(Cache* aCache);
virtual void
ResolvedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue) override;
virtual void
RejectedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue) override;
private:
~CacheScriptLoader()
{
AssertIsOnMainThread();
}
ScriptLoadInfo& mLoadInfo;
uint32_t mIndex;
nsRefPtr<ScriptLoaderRunnable> mRunnable;
bool mIsWorkerScript;
bool mFailed;
nsCOMPtr<nsIInputStreamPump> mPump;
nsCOMPtr<nsIURI> mBaseURI;
nsCString mSecurityInfo;
};
NS_IMPL_ISUPPORTS(CacheScriptLoader, nsIStreamLoaderObserver)
class CachePromiseHandler final : public PromiseNativeHandler
{
public:
CachePromiseHandler(ScriptLoaderRunnable* aRunnable,
ScriptLoadInfo& aLoadInfo,
uint32_t aIndex)
: mRunnable(aRunnable)
, mLoadInfo(aLoadInfo)
, mIndex(aIndex)
{
AssertIsOnMainThread();
MOZ_ASSERT(mRunnable);
}
virtual void
ResolvedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue) override;
virtual void
RejectedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue) override;
private:
~CachePromiseHandler()
{
AssertIsOnMainThread();
}
nsRefPtr<ScriptLoaderRunnable> mRunnable;
ScriptLoadInfo& mLoadInfo;
uint32_t mIndex;
};
class ScriptLoaderRunnable final : public WorkerFeature,
public nsIRunnable,
public nsIStreamLoaderObserver,
public nsIRequestObserver
{
friend class ScriptExecutorRunnable;
friend class CachePromiseHandler;
friend class CacheScriptLoader;
WorkerPrivate* mWorkerPrivate;
nsCOMPtr<nsIEventTarget> mSyncLoopTarget;
nsTArray<ScriptLoadInfo> mLoadInfos;
nsRefPtr<CacheCreator> mCacheCreator;
nsCOMPtr<nsIInputStream> mReader;
bool mIsMainScript;
WorkerScriptType mWorkerScriptType;
bool mCanceled;
bool mCanceledMainThread;
public:
NS_DECL_THREADSAFE_ISUPPORTS
ScriptLoaderRunnable(WorkerPrivate* aWorkerPrivate,
nsIEventTarget* aSyncLoopTarget,
nsTArray<ScriptLoadInfo>& aLoadInfos,
bool aIsMainScript,
WorkerScriptType aWorkerScriptType)
: mWorkerPrivate(aWorkerPrivate), mSyncLoopTarget(aSyncLoopTarget),
mIsMainScript(aIsMainScript), mWorkerScriptType(aWorkerScriptType),
mCanceled(false), mCanceledMainThread(false)
{
aWorkerPrivate->AssertIsOnWorkerThread();
MOZ_ASSERT(aSyncLoopTarget);
MOZ_ASSERT_IF(aIsMainScript, aLoadInfos.Length() == 1);
mLoadInfos.SwapElements(aLoadInfos);
}
private:
~ScriptLoaderRunnable()
{ }
NS_IMETHOD
Run() override
{
AssertIsOnMainThread();
if (NS_FAILED(RunInternal())) {
CancelMainThread();
}
return NS_OK;
}
void
LoadingFinished(uint32_t aIndex, nsresult aRv)
{
AssertIsOnMainThread();
MOZ_ASSERT(aIndex < mLoadInfos.Length());
ScriptLoadInfo& loadInfo = mLoadInfos[aIndex];
loadInfo.mLoadResult = aRv;
MOZ_ASSERT(!loadInfo.mLoadingFinished);
loadInfo.mLoadingFinished = true;
MaybeExecuteFinishedScripts(aIndex);
}
void
MaybeExecuteFinishedScripts(uint32_t aIndex)
{
AssertIsOnMainThread();
MOZ_ASSERT(aIndex < mLoadInfos.Length());
ScriptLoadInfo& loadInfo = mLoadInfos[aIndex];
// We execute the last step if we don't have a pending operation with the
// cache and the loading is completed.
if (loadInfo.Finished()) {
ExecuteFinishedScripts();
}
}
NS_IMETHOD
OnStreamComplete(nsIStreamLoader* aLoader, nsISupports* aContext,
nsresult aStatus, uint32_t aStringLen,
const uint8_t* aString) override
{
AssertIsOnMainThread();
nsCOMPtr<nsISupportsPRUint32> indexSupports(do_QueryInterface(aContext));
NS_ASSERTION(indexSupports, "This should never fail!");
uint32_t index = UINT32_MAX;
if (NS_FAILED(indexSupports->GetData(&index)) ||
index >= mLoadInfos.Length()) {
NS_ERROR("Bad index!");
}
ScriptLoadInfo& loadInfo = mLoadInfos[index];
nsresult rv = OnStreamCompleteInternal(aLoader, aContext, aStatus,
aStringLen, aString, loadInfo);
LoadingFinished(index, rv);
return NS_OK;
}
NS_IMETHOD
OnStartRequest(nsIRequest* aRequest, nsISupports* aContext) override
{
AssertIsOnMainThread();
nsCOMPtr<nsISupportsPRUint32> indexSupports(do_QueryInterface(aContext));
MOZ_ASSERT(indexSupports, "This should never fail!");
uint32_t index = UINT32_MAX;
if (NS_FAILED(indexSupports->GetData(&index)) ||
index >= mLoadInfos.Length()) {
MOZ_CRASH("Bad index!");
}
ScriptLoadInfo& loadInfo = mLoadInfos[index];
nsCOMPtr<nsIChannel> channel = do_QueryInterface(aRequest);
MOZ_ASSERT(channel == loadInfo.mChannel);
// We synthesize the result code, but its never exposed to content.
nsRefPtr<InternalResponse> ir =
new InternalResponse(200, NS_LITERAL_CSTRING("OK"));
ir->SetBody(mReader);
// Set the security info of the channel on the response so that it's
// saved in the cache.
nsCOMPtr<nsISupports> infoObj;
channel->GetSecurityInfo(getter_AddRefs(infoObj));
if (infoObj) {
nsCOMPtr<nsISerializable> serializable = do_QueryInterface(infoObj);
if (serializable) {
ir->SetSecurityInfo(serializable);
MOZ_ASSERT(!ir->GetSecurityInfo().IsEmpty());
} else {
NS_WARNING("A non-serializable object was obtained from nsIChannel::GetSecurityInfo()!");
}
}
nsRefPtr<Response> response = new Response(mCacheCreator->Global(), ir);
RequestOrUSVString request;
MOZ_ASSERT(!loadInfo.mFullURL.IsEmpty());
request.SetAsUSVString().Rebind(loadInfo.mFullURL.Data(),
loadInfo.mFullURL.Length());
ErrorResult error;
nsRefPtr<Promise> cachePromise =
mCacheCreator->Cache_()->Put(request, *response, error);
if (NS_WARN_IF(error.Failed())) {
nsresult rv = error.StealNSResult();
channel->Cancel(rv);
return rv;
}
nsRefPtr<CachePromiseHandler> promiseHandler =
new CachePromiseHandler(this, loadInfo, index);
cachePromise->AppendNativeHandler(promiseHandler);
loadInfo.mCachePromise.swap(cachePromise);
loadInfo.mCacheStatus = ScriptLoadInfo::WritingToCache;
return NS_OK;
}
NS_IMETHOD
OnStopRequest(nsIRequest* aRequest, nsISupports* aContext,
nsresult aStatusCode) override
{
// Nothing to do here!
return NS_OK;
}
virtual bool
Notify(JSContext* aCx, Status aStatus) override
{
mWorkerPrivate->AssertIsOnWorkerThread();
if (aStatus >= Terminating && !mCanceled) {
mCanceled = true;
nsCOMPtr<nsIRunnable> runnable =
NS_NewRunnableMethod(this, &ScriptLoaderRunnable::CancelMainThread);
NS_ASSERTION(runnable, "This should never fail!");
if (NS_FAILED(NS_DispatchToMainThread(runnable))) {
JS_ReportError(aCx, "Failed to cancel script loader!");
return false;
}
}
return true;
}
bool
IsMainWorkerScript() const
{
return mIsMainScript && mWorkerScriptType == WorkerScript;
}
void
CancelMainThread()
{
AssertIsOnMainThread();
if (mCanceledMainThread) {
return;
}
mCanceledMainThread = true;
if (mCacheCreator) {
MOZ_ASSERT(mWorkerPrivate->IsServiceWorker());
DeleteCache();
}
// Cancel all the channels that were already opened.
for (uint32_t index = 0; index < mLoadInfos.Length(); index++) {
ScriptLoadInfo& loadInfo = mLoadInfos[index];
// If promise or channel is non-null, their failures will lead to
// LoadingFinished being called.
bool callLoadingFinished = true;
if (loadInfo.mCachePromise) {
MOZ_ASSERT(mWorkerPrivate->IsServiceWorker());
loadInfo.mCachePromise->MaybeReject(NS_BINDING_ABORTED);
loadInfo.mCachePromise = nullptr;
callLoadingFinished = false;
}
if (loadInfo.mChannel) {
if (NS_SUCCEEDED(loadInfo.mChannel->Cancel(NS_BINDING_ABORTED))) {
callLoadingFinished = false;
} else {
NS_WARNING("Failed to cancel channel!");
}
}
if (callLoadingFinished && !loadInfo.Finished()) {
LoadingFinished(index, NS_BINDING_ABORTED);
}
}
ExecuteFinishedScripts();
}
void
DeleteCache()
{
AssertIsOnMainThread();
if (!mCacheCreator) {
return;
}
mCacheCreator->DeleteCache();
mCacheCreator = nullptr;
}
nsresult
RunInternal()
{
AssertIsOnMainThread();
if (IsMainWorkerScript() && mWorkerPrivate->IsServiceWorker()) {
mWorkerPrivate->SetLoadingWorkerScript(true);
}
if (!mWorkerPrivate->IsServiceWorker() ||
!mWorkerPrivate->LoadScriptAsPartOfLoadingServiceWorkerScript()) {
for (uint32_t index = 0, len = mLoadInfos.Length(); index < len;
++index) {
nsresult rv = LoadScript(index);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
return NS_OK;
}
MOZ_ASSERT(!mCacheCreator);
mCacheCreator = new CacheCreator(mWorkerPrivate);
for (uint32_t index = 0, len = mLoadInfos.Length(); index < len; ++index) {
nsRefPtr<CacheScriptLoader> loader =
new CacheScriptLoader(mWorkerPrivate, mLoadInfos[index], index,
IsMainWorkerScript(), this);
mCacheCreator->AddLoader(loader);
}
// The worker may have a null principal on first load, but in that case its
// parent definitely will have one.
nsIPrincipal* principal = mWorkerPrivate->GetPrincipal();
if (!principal) {
WorkerPrivate* parentWorker = mWorkerPrivate->GetParent();
MOZ_ASSERT(parentWorker, "Must have a parent!");
principal = parentWorker->GetPrincipal();
}
nsresult rv = mCacheCreator->Load(principal);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
nsresult
LoadScript(uint32_t aIndex)
{
AssertIsOnMainThread();
MOZ_ASSERT(aIndex < mLoadInfos.Length());
WorkerPrivate* parentWorker = mWorkerPrivate->GetParent();
// Figure out which principal to use.
nsIPrincipal* principal = mWorkerPrivate->GetPrincipal();
nsCOMPtr<nsILoadGroup> loadGroup = mWorkerPrivate->GetLoadGroup();
if (!principal) {
NS_ASSERTION(parentWorker, "Must have a principal!");
NS_ASSERTION(mIsMainScript, "Must have a principal for importScripts!");
principal = parentWorker->GetPrincipal();
loadGroup = parentWorker->GetLoadGroup();
}
NS_ASSERTION(principal, "This should never be null here!");
MOZ_ASSERT(NS_LoadGroupMatchesPrincipal(loadGroup, principal));
// Figure out our base URI.
nsCOMPtr<nsIURI> baseURI = GetBaseURI(mIsMainScript, mWorkerPrivate);
// May be null.
nsCOMPtr<nsIDocument> parentDoc = mWorkerPrivate->GetDocument();
nsCOMPtr<nsIChannel> channel;
if (IsMainWorkerScript()) {
// May be null.
channel = mWorkerPrivate->ForgetWorkerChannel();
}
nsCOMPtr<nsIIOService> ios(do_GetIOService());
nsIScriptSecurityManager* secMan = nsContentUtils::GetSecurityManager();
NS_ASSERTION(secMan, "This should never be null!");
ScriptLoadInfo& loadInfo = mLoadInfos[aIndex];
nsresult& rv = loadInfo.mLoadResult;
if (!channel) {
rv = ChannelFromScriptURL(principal, baseURI, parentDoc, loadGroup, ios,
secMan, loadInfo.mURL, IsMainWorkerScript(),
mWorkerScriptType, getter_AddRefs(channel));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
// We need to know which index we're on in OnStreamComplete so we know
// where to put the result.
nsCOMPtr<nsISupportsPRUint32> indexSupports =
do_CreateInstance(NS_SUPPORTS_PRUINT32_CONTRACTID, &rv);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
rv = indexSupports->SetData(aIndex);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// We don't care about progress so just use the simple stream loader for
// OnStreamComplete notification only.
nsCOMPtr<nsIStreamLoader> loader;
rv = NS_NewStreamLoader(getter_AddRefs(loader), this);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (loadInfo.mCacheStatus != ScriptLoadInfo::ToBeCached) {
rv = channel->AsyncOpen(loader, indexSupports);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
} else {
nsCOMPtr<nsIOutputStream> writer;
// In case we return early.
loadInfo.mCacheStatus = ScriptLoadInfo::Cancel;
rv = NS_NewPipe(getter_AddRefs(mReader), getter_AddRefs(writer), 0,
UINT32_MAX, // unlimited size to avoid writer WOULD_BLOCK case
true, false); // non-blocking reader, blocking writer
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
nsCOMPtr<nsIStreamListenerTee> tee =
do_CreateInstance(NS_STREAMLISTENERTEE_CONTRACTID);
rv = tee->Init(loader, writer, this);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
nsresult rv = channel->AsyncOpen(tee, indexSupports);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
loadInfo.mChannel.swap(channel);
return NS_OK;
}
nsresult
OnStreamCompleteInternal(nsIStreamLoader* aLoader, nsISupports* aContext,
nsresult aStatus, uint32_t aStringLen,
const uint8_t* aString, ScriptLoadInfo& aLoadInfo)
{
AssertIsOnMainThread();
if (!aLoadInfo.mChannel) {
return NS_BINDING_ABORTED;
}
aLoadInfo.mChannel = nullptr;
if (NS_FAILED(aStatus)) {
return aStatus;
}
NS_ASSERTION(aString, "This should never be null!");
// Make sure we're not seeing the result of a 404 or something by checking
// the 'requestSucceeded' attribute on the http channel.
nsCOMPtr<nsIRequest> request;
nsresult rv = aLoader->GetRequest(getter_AddRefs(request));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(request);
if (httpChannel) {
bool requestSucceeded;
rv = httpChannel->GetRequestSucceeded(&requestSucceeded);
NS_ENSURE_SUCCESS(rv, rv);
if (!requestSucceeded) {
return NS_ERROR_NOT_AVAILABLE;
}
}
// May be null.
nsIDocument* parentDoc = mWorkerPrivate->GetDocument();
// Use the regular nsScriptLoader for this grunt work! Should be just fine
// because we're running on the main thread.
// Unlike <script> tags, Worker scripts are always decoded as UTF-8,
// per spec. So we explicitly pass in the charset hint.
rv = nsScriptLoader::ConvertToUTF16(aLoadInfo.mChannel, aString, aStringLen,
NS_LITERAL_STRING("UTF-8"), parentDoc,
aLoadInfo.mScriptTextBuf,
aLoadInfo.mScriptTextLength);
if (NS_FAILED(rv)) {
return rv;
}
if (!aLoadInfo.mScriptTextLength && !aLoadInfo.mScriptTextBuf) {
nsContentUtils::ReportToConsole(nsIScriptError::warningFlag,
NS_LITERAL_CSTRING("DOM"), parentDoc,
nsContentUtils::eDOM_PROPERTIES,
"EmptyWorkerSourceWarning");
} else if (!aLoadInfo.mScriptTextBuf) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIChannel> channel = do_QueryInterface(request);
NS_ASSERTION(channel, "This should never fail!");
// Figure out what we actually loaded.
nsCOMPtr<nsIURI> finalURI;
rv = NS_GetFinalChannelURI(channel, getter_AddRefs(finalURI));
NS_ENSURE_SUCCESS(rv, rv);
nsCString filename;
rv = finalURI->GetSpec(filename);
NS_ENSURE_SUCCESS(rv, rv);
if (!filename.IsEmpty()) {
// This will help callers figure out what their script url resolved to in
// case of errors.
aLoadInfo.mURL.Assign(NS_ConvertUTF8toUTF16(filename));
}
// Update the principal of the worker and its base URI if we just loaded the
// worker's primary script.
if (IsMainWorkerScript()) {
// Take care of the base URI first.
mWorkerPrivate->SetBaseURI(finalURI);
// Store the security info if needed.
if (mWorkerPrivate->IsServiceWorker()) {
nsCOMPtr<nsISupports> infoObj;
channel->GetSecurityInfo(getter_AddRefs(infoObj));
if (infoObj) {
nsCOMPtr<nsISerializable> serializable = do_QueryInterface(infoObj);
if (serializable) {
mWorkerPrivate->SetSecurityInfo(serializable);
} else {
NS_WARNING("A non-serializable object was obtained from nsIChannel::GetSecurityInfo()!");
}
}
}
// Now to figure out which principal to give this worker.
WorkerPrivate* parent = mWorkerPrivate->GetParent();
NS_ASSERTION(mWorkerPrivate->GetPrincipal() || parent,
"Must have one of these!");
nsCOMPtr<nsIPrincipal> loadPrincipal = mWorkerPrivate->GetPrincipal() ?
mWorkerPrivate->GetPrincipal() :
parent->GetPrincipal();
nsIScriptSecurityManager* ssm = nsContentUtils::GetSecurityManager();
NS_ASSERTION(ssm, "Should never be null!");
nsCOMPtr<nsIPrincipal> channelPrincipal;
rv = ssm->GetChannelResultPrincipal(channel, getter_AddRefs(channelPrincipal));
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsILoadGroup> channelLoadGroup;
rv = channel->GetLoadGroup(getter_AddRefs(channelLoadGroup));
NS_ENSURE_SUCCESS(rv, rv);
MOZ_ASSERT(channelLoadGroup);
// See if this is a resource URI. Since JSMs usually come from resource://
// URIs we're currently considering all URIs with the URI_IS_UI_RESOURCE
// flag as valid for creating privileged workers.
if (!nsContentUtils::IsSystemPrincipal(channelPrincipal)) {
bool isResource;
rv = NS_URIChainHasFlags(finalURI,
nsIProtocolHandler::URI_IS_UI_RESOURCE,
&isResource);
NS_ENSURE_SUCCESS(rv, rv);
if (isResource) {
rv = ssm->GetSystemPrincipal(getter_AddRefs(channelPrincipal));
NS_ENSURE_SUCCESS(rv, rv);
}
}
// If the load principal is the system principal then the channel
// principal must also be the system principal (we do not allow chrome
// code to create workers with non-chrome scripts). Otherwise this channel
// principal must be same origin with the load principal (we check again
// here in case redirects changed the location of the script).
if (nsContentUtils::IsSystemPrincipal(loadPrincipal)) {
if (!nsContentUtils::IsSystemPrincipal(channelPrincipal)) {
return NS_ERROR_DOM_BAD_URI;
}
}
else {
nsCString scheme;
rv = finalURI->GetScheme(scheme);
NS_ENSURE_SUCCESS(rv, rv);
// We exempt data urls and other URI's that inherit their
// principal again.
if (NS_FAILED(loadPrincipal->CheckMayLoad(finalURI, false, true))) {
return NS_ERROR_DOM_BAD_URI;
}
}
// The principal can change, but it should still match the original
// load group's appId and browser element flag.
MOZ_ASSERT(NS_LoadGroupMatchesPrincipal(channelLoadGroup, channelPrincipal));
mWorkerPrivate->SetPrincipal(channelPrincipal, channelLoadGroup);
}
DataReceived();
return NS_OK;
}
void
DataReceivedFromCache(uint32_t aIndex, const uint8_t* aString,
uint32_t aStringLen, const nsCString& aSecurityInfo)
{
AssertIsOnMainThread();
MOZ_ASSERT(aIndex < mLoadInfos.Length());
ScriptLoadInfo& loadInfo = mLoadInfos[aIndex];
MOZ_ASSERT(loadInfo.mCacheStatus == ScriptLoadInfo::Cached);
// May be null.
nsIDocument* parentDoc = mWorkerPrivate->GetDocument();
MOZ_ASSERT(!loadInfo.mScriptTextBuf);
nsresult rv =
nsScriptLoader::ConvertToUTF16(nullptr, aString, aStringLen,
NS_LITERAL_STRING("UTF-8"), parentDoc,
loadInfo.mScriptTextBuf,
loadInfo.mScriptTextLength);
if (NS_SUCCEEDED(rv) && IsMainWorkerScript()) {
nsCOMPtr<nsIURI> finalURI;
rv = NS_NewURI(getter_AddRefs(finalURI), loadInfo.mFullURL, nullptr, nullptr);
if (NS_SUCCEEDED(rv)) {
mWorkerPrivate->SetBaseURI(finalURI);
}
nsIPrincipal* principal = mWorkerPrivate->GetPrincipal();
MOZ_ASSERT(principal);
nsILoadGroup* loadGroup = mWorkerPrivate->GetLoadGroup();
MOZ_ASSERT(loadGroup);
mWorkerPrivate->SetSecurityInfo(aSecurityInfo);
// Needed to initialize the principal info. This is fine because
// the cache principal cannot change, unlike the channel principal.
mWorkerPrivate->SetPrincipal(principal, loadGroup);
}
if (NS_SUCCEEDED(rv)) {
DataReceived();
}
LoadingFinished(aIndex, rv);
}
void
DataReceived()
{
if (IsMainWorkerScript()) {
WorkerPrivate* parent = mWorkerPrivate->GetParent();
if (parent) {
// XHR Params Allowed
mWorkerPrivate->SetXHRParamsAllowed(parent->XHRParamsAllowed());
// Set Eval and ContentSecurityPolicy
mWorkerPrivate->SetCSP(parent->GetCSP());
mWorkerPrivate->SetEvalAllowed(parent->IsEvalAllowed());
}
}
}
void
ExecuteFinishedScripts()
{
AssertIsOnMainThread();
if (IsMainWorkerScript()) {
mWorkerPrivate->WorkerScriptLoaded();
}
uint32_t firstIndex = UINT32_MAX;
uint32_t lastIndex = UINT32_MAX;
// Find firstIndex based on whether mExecutionScheduled is unset.
for (uint32_t index = 0; index < mLoadInfos.Length(); index++) {
if (!mLoadInfos[index].mExecutionScheduled) {
firstIndex = index;
break;
}
}
// Find lastIndex based on whether mChannel is set, and update
// mExecutionScheduled on the ones we're about to schedule.
if (firstIndex != UINT32_MAX) {
for (uint32_t index = firstIndex; index < mLoadInfos.Length(); index++) {
ScriptLoadInfo& loadInfo = mLoadInfos[index];
if (!loadInfo.Finished()) {
break;
}
// We can execute this one.
loadInfo.mExecutionScheduled = true;
lastIndex = index;
}
}
// This is the last index, we can unused things before the exection of the
// script and the stopping of the sync loop.
if (lastIndex == mLoadInfos.Length() - 1) {
mCacheCreator = nullptr;
}
if (firstIndex != UINT32_MAX && lastIndex != UINT32_MAX) {
nsRefPtr<ScriptExecutorRunnable> runnable =
new ScriptExecutorRunnable(*this, mSyncLoopTarget, IsMainWorkerScript(),
firstIndex, lastIndex);
if (!runnable->Dispatch(nullptr)) {
MOZ_ASSERT(false, "This should never fail!");
}
}
}
};
NS_IMPL_ISUPPORTS(ScriptLoaderRunnable, nsIRunnable,
nsIStreamLoaderObserver,
nsIRequestObserver)
void
CachePromiseHandler::ResolvedCallback(JSContext* aCx,
JS::Handle<JS::Value> aValue)
{
AssertIsOnMainThread();
// May already have been canceled by CacheScriptLoader::Fail from
// CancelMainThread.
MOZ_ASSERT(mLoadInfo.mCacheStatus == ScriptLoadInfo::WritingToCache ||
mLoadInfo.mCacheStatus == ScriptLoadInfo::Cancel);
MOZ_ASSERT_IF(mLoadInfo.mCacheStatus == ScriptLoadInfo::Cancel, !mLoadInfo.mCachePromise);
if (mLoadInfo.mCachePromise) {
mLoadInfo.mCacheStatus = ScriptLoadInfo::Cached;
mLoadInfo.mCachePromise = nullptr;
mRunnable->MaybeExecuteFinishedScripts(mIndex);
}
}
void
CachePromiseHandler::RejectedCallback(JSContext* aCx,
JS::Handle<JS::Value> aValue)
{
AssertIsOnMainThread();
// May already have been canceled by CacheScriptLoader::Fail from
// CancelMainThread.
MOZ_ASSERT(mLoadInfo.mCacheStatus == ScriptLoadInfo::WritingToCache ||
mLoadInfo.mCacheStatus == ScriptLoadInfo::Cancel);
mLoadInfo.mCacheStatus = ScriptLoadInfo::Cancel;
mLoadInfo.mCachePromise = nullptr;
// This will delete the cache object and will call LoadingFinished() with an
// error for each ongoing operation.
mRunnable->DeleteCache();
}
nsresult
CacheCreator::CreateCacheStorage(nsIPrincipal* aPrincipal)
{
AssertIsOnMainThread();
MOZ_ASSERT(!mCacheStorage);
MOZ_ASSERT(aPrincipal);
nsIXPConnect* xpc = nsContentUtils::XPConnect();
MOZ_ASSERT(xpc, "This should never be null!");
AutoSafeJSContext cx;
nsCOMPtr<nsIXPConnectJSObjectHolder> sandbox;
nsresult rv = xpc->CreateSandbox(cx, aPrincipal, getter_AddRefs(sandbox));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
mSandboxGlobalObject = xpc::NativeGlobal(sandbox->GetJSObject());
if (NS_WARN_IF(!mSandboxGlobalObject)) {
return NS_ERROR_FAILURE;
}
ErrorResult error;
mCacheStorage =
CacheStorage::CreateOnMainThread(cache::CHROME_ONLY_NAMESPACE,
mSandboxGlobalObject,
aPrincipal, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
return NS_OK;
}
nsresult
CacheCreator::Load(nsIPrincipal* aPrincipal)
{
AssertIsOnMainThread();
MOZ_ASSERT(!mLoaders.IsEmpty());
nsresult rv = CreateCacheStorage(aPrincipal);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
ErrorResult error;
MOZ_ASSERT(!mCacheName.IsEmpty());
nsRefPtr<Promise> promise = mCacheStorage->Open(mCacheName, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
promise->AppendNativeHandler(this);
return NS_OK;
}
void
CacheCreator::FailLoaders(nsresult aRv)
{
AssertIsOnMainThread();
// Fail() can call LoadingFinished() which may call ExecuteFinishedScripts()
// which sets mCacheCreator to null, so hold a ref.
nsRefPtr<CacheCreator> kungfuDeathGrip = this;
for (uint32_t i = 0, len = mLoaders.Length(); i < len; ++i) {
mLoaders[i]->Fail(aRv);
}
mLoaders.Clear();
}
void
CacheCreator::RejectedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue)
{
AssertIsOnMainThread();
FailLoaders(NS_ERROR_FAILURE);
}
void
CacheCreator::ResolvedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue)
{
AssertIsOnMainThread();
MOZ_ASSERT(aValue.isObject());
JS::Rooted<JSObject*> obj(aCx, &aValue.toObject());
Cache* cache = nullptr;
nsresult rv = UNWRAP_OBJECT(Cache, obj, cache);
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(rv));
mCache = cache;
MOZ_ASSERT(mCache);
// If the worker is canceled, CancelMainThread() will have cleared the
// loaders.
for (uint32_t i = 0, len = mLoaders.Length(); i < len; ++i) {
mLoaders[i]->Load(cache);
}
}
void
CacheCreator::DeleteCache()
{
AssertIsOnMainThread();
ErrorResult rv;
// It's safe to do this while Cache::Match() and Cache::Put() calls are
// running.
nsRefPtr<Promise> promise = mCacheStorage->Delete(mCacheName, rv);
if (NS_WARN_IF(rv.Failed())) {
return;
}
// We don't care to know the result of the promise object.
FailLoaders(NS_ERROR_FAILURE);
}
void
CacheScriptLoader::Fail(nsresult aRv)
{
AssertIsOnMainThread();
MOZ_ASSERT(NS_FAILED(aRv));
if (mFailed) {
return;
}
mFailed = true;
if (mPump) {
MOZ_ASSERT(mLoadInfo.mCacheStatus == ScriptLoadInfo::ReadingFromCache);
mPump->Cancel(aRv);
mPump = nullptr;
}
mLoadInfo.mCacheStatus = ScriptLoadInfo::Cancel;
// Stop if the load was aborted on the main thread.
// Can't use Finished() because mCachePromise may still be true.
if (mLoadInfo.mLoadingFinished) {
MOZ_ASSERT(!mLoadInfo.mChannel);
MOZ_ASSERT_IF(mLoadInfo.mCachePromise,
mLoadInfo.mCacheStatus == ScriptLoadInfo::WritingToCache ||
mLoadInfo.mCacheStatus == ScriptLoadInfo::Cancel);
return;
}
mRunnable->LoadingFinished(mIndex, aRv);
}
void
CacheScriptLoader::Load(Cache* aCache)
{
AssertIsOnMainThread();
MOZ_ASSERT(aCache);
nsCOMPtr<nsIURI> uri;
nsresult rv = NS_NewURI(getter_AddRefs(uri), mLoadInfo.mURL, nullptr,
mBaseURI);
if (NS_WARN_IF(NS_FAILED(rv))) {
Fail(rv);
return;
}
nsAutoCString spec;
rv = uri->GetSpec(spec);
if (NS_WARN_IF(NS_FAILED(rv))) {
Fail(rv);
return;
}
MOZ_ASSERT(mLoadInfo.mFullURL.IsEmpty());
CopyUTF8toUTF16(spec, mLoadInfo.mFullURL);
RequestOrUSVString request;
request.SetAsUSVString().Rebind(mLoadInfo.mFullURL.Data(),
mLoadInfo.mFullURL.Length());
CacheQueryOptions params;
ErrorResult error;
nsRefPtr<Promise> promise = aCache->Match(request, params, error);
if (NS_WARN_IF(error.Failed())) {
Fail(error.StealNSResult());
return;
}
promise->AppendNativeHandler(this);
}
void
CacheScriptLoader::RejectedCallback(JSContext* aCx,
JS::Handle<JS::Value> aValue)
{
AssertIsOnMainThread();
MOZ_ASSERT(mLoadInfo.mCacheStatus == ScriptLoadInfo::Uncached);
Fail(NS_ERROR_FAILURE);
}
void
CacheScriptLoader::ResolvedCallback(JSContext* aCx,
JS::Handle<JS::Value> aValue)
{
AssertIsOnMainThread();
// If we have already called 'Fail', we should not proceed.
if (mFailed) {
return;
}
MOZ_ASSERT(mLoadInfo.mCacheStatus == ScriptLoadInfo::Uncached);
if (aValue.isUndefined()) {
mLoadInfo.mCacheStatus = ScriptLoadInfo::ToBeCached;
mRunnable->LoadScript(mIndex);
return;
}
MOZ_ASSERT(aValue.isObject());
JS::Rooted<JSObject*> obj(aCx, &aValue.toObject());
Response* response = nullptr;
nsresult rv = UNWRAP_OBJECT(Response, obj, response);
if (NS_WARN_IF(NS_FAILED(rv))) {
Fail(rv);
return;
}
nsCOMPtr<nsIInputStream> inputStream;
response->GetBody(getter_AddRefs(inputStream));
mSecurityInfo = response->GetSecurityInfo();
if (!inputStream) {
mLoadInfo.mCacheStatus = ScriptLoadInfo::Cached;
mRunnable->DataReceivedFromCache(mIndex, (uint8_t*)"", 0, mSecurityInfo);
return;
}
MOZ_ASSERT(!mPump);
rv = NS_NewInputStreamPump(getter_AddRefs(mPump), inputStream);
if (NS_WARN_IF(NS_FAILED(rv))) {
Fail(rv);
return;
}
nsCOMPtr<nsIStreamLoader> loader;
rv = NS_NewStreamLoader(getter_AddRefs(loader), this);
if (NS_WARN_IF(NS_FAILED(rv))) {
Fail(rv);
return;
}
rv = mPump->AsyncRead(loader, nullptr);
if (NS_WARN_IF(NS_FAILED(rv))) {
mPump = nullptr;
Fail(rv);
return;
}
nsCOMPtr<nsIThreadRetargetableRequest> rr = do_QueryInterface(mPump);
if (rr) {
nsCOMPtr<nsIEventTarget> sts =
do_GetService(NS_STREAMTRANSPORTSERVICE_CONTRACTID);
rv = rr->RetargetDeliveryTo(sts);
if (NS_FAILED(rv)) {
NS_WARNING("Failed to dispatch the nsIInputStreamPump to a IO thread.");
}
}
mLoadInfo.mCacheStatus = ScriptLoadInfo::ReadingFromCache;
}
NS_IMETHODIMP
CacheScriptLoader::OnStreamComplete(nsIStreamLoader* aLoader, nsISupports* aContext,
nsresult aStatus, uint32_t aStringLen,
const uint8_t* aString)
{
AssertIsOnMainThread();
MOZ_ASSERT(mLoadInfo.mCacheStatus == ScriptLoadInfo::ReadingFromCache);
mPump = nullptr;
if (NS_FAILED(aStatus)) {
Fail(aStatus);
return NS_OK;
}
mLoadInfo.mCacheStatus = ScriptLoadInfo::Cached;
mRunnable->DataReceivedFromCache(mIndex, aString, aStringLen, mSecurityInfo);
return NS_OK;
}
class ChannelGetterRunnable final : public nsRunnable
{
WorkerPrivate* mParentWorker;
nsCOMPtr<nsIEventTarget> mSyncLoopTarget;
const nsAString& mScriptURL;
nsIChannel** mChannel;
nsresult mResult;
public:
ChannelGetterRunnable(WorkerPrivate* aParentWorker,
nsIEventTarget* aSyncLoopTarget,
const nsAString& aScriptURL,
nsIChannel** aChannel)
: mParentWorker(aParentWorker), mSyncLoopTarget(aSyncLoopTarget),
mScriptURL(aScriptURL), mChannel(aChannel), mResult(NS_ERROR_FAILURE)
{
MOZ_ASSERT(mParentWorker);
aParentWorker->AssertIsOnWorkerThread();
MOZ_ASSERT(aSyncLoopTarget);
}
NS_IMETHOD
Run() override
{
AssertIsOnMainThread();
nsIPrincipal* principal = mParentWorker->GetPrincipal();
MOZ_ASSERT(principal);
// Figure out our base URI.
nsCOMPtr<nsIURI> baseURI = mParentWorker->GetBaseURI();
MOZ_ASSERT(baseURI);
// May be null.
nsCOMPtr<nsIDocument> parentDoc = mParentWorker->GetDocument();
nsCOMPtr<nsILoadGroup> loadGroup = mParentWorker->GetLoadGroup();
nsCOMPtr<nsIChannel> channel;
mResult =
scriptloader::ChannelFromScriptURLMainThread(principal, baseURI,
parentDoc, loadGroup,
mScriptURL,
getter_AddRefs(channel));
if (NS_SUCCEEDED(mResult)) {
channel.forget(mChannel);
}
nsRefPtr<MainThreadStopSyncLoopRunnable> runnable =
new MainThreadStopSyncLoopRunnable(mParentWorker,
mSyncLoopTarget.forget(), true);
if (!runnable->Dispatch(nullptr)) {
NS_ERROR("This should never fail!");
}
return NS_OK;
}
nsresult
GetResult() const
{
return mResult;
}
private:
virtual ~ChannelGetterRunnable()
{ }
};
ScriptExecutorRunnable::ScriptExecutorRunnable(
ScriptLoaderRunnable& aScriptLoader,
nsIEventTarget* aSyncLoopTarget,
bool aIsWorkerScript,
uint32_t aFirstIndex,
uint32_t aLastIndex)
: MainThreadWorkerSyncRunnable(aScriptLoader.mWorkerPrivate, aSyncLoopTarget),
mScriptLoader(aScriptLoader), mIsWorkerScript(aIsWorkerScript),
mFirstIndex(aFirstIndex), mLastIndex(aLastIndex)
{
MOZ_ASSERT(aFirstIndex <= aLastIndex);
MOZ_ASSERT(aLastIndex < aScriptLoader.mLoadInfos.Length());
}
bool
ScriptExecutorRunnable::IsDebuggerRunnable() const
{
// ScriptExecutorRunnable is used to execute both worker and debugger scripts.
// In the latter case, the runnable needs to be dispatched to the debugger
// queue.
return mScriptLoader.mWorkerScriptType == DebuggerScript;
}
bool
ScriptExecutorRunnable::WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate)
{
nsTArray<ScriptLoadInfo>& loadInfos = mScriptLoader.mLoadInfos;
// Don't run if something else has already failed.
for (uint32_t index = 0; index < mFirstIndex; index++) {
ScriptLoadInfo& loadInfo = loadInfos.ElementAt(index);
NS_ASSERTION(!loadInfo.mChannel, "Should no longer have a channel!");
NS_ASSERTION(loadInfo.mExecutionScheduled, "Should be scheduled!");
if (!loadInfo.mExecutionResult) {
return true;
}
}
JS::Rooted<JSObject*> global(aCx, JS::CurrentGlobalOrNull(aCx));
NS_ASSERTION(global, "Must have a global by now!");
// Determine whether we want to be discarding source on this global to save
// memory. It would make more sense to do this when we create the global, but
// the information behind UsesSystemPrincipal() et al isn't finalized until
// the call to SetPrincipal during the first script load. After that, however,
// it never changes. So we can just idempotently set the bits here.
//
// Note that we read a pref that is cached on the main thread. This is benignly
// racey.
if (xpc::ShouldDiscardSystemSource()) {
bool discard = aWorkerPrivate->UsesSystemPrincipal() ||
aWorkerPrivate->IsInPrivilegedApp();
JS::CompartmentOptionsRef(global).setDiscardSource(discard);
}
// Similar to the above.
if (xpc::ExtraWarningsForSystemJS() && aWorkerPrivate->UsesSystemPrincipal()) {
JS::CompartmentOptionsRef(global).extraWarningsOverride().set(true);
}
for (uint32_t index = mFirstIndex; index <= mLastIndex; index++) {
ScriptLoadInfo& loadInfo = loadInfos.ElementAt(index);
NS_ASSERTION(!loadInfo.mChannel, "Should no longer have a channel!");
NS_ASSERTION(loadInfo.mExecutionScheduled, "Should be scheduled!");
NS_ASSERTION(!loadInfo.mExecutionResult, "Should not have executed yet!");
if (NS_FAILED(loadInfo.mLoadResult)) {
scriptloader::ReportLoadError(aCx, loadInfo.mURL, loadInfo.mLoadResult,
false);
return true;
}
NS_ConvertUTF16toUTF8 filename(loadInfo.mURL);
JS::CompileOptions options(aCx);
options.setFileAndLine(filename.get(), 1)
.setNoScriptRval(true);
if (mScriptLoader.mWorkerScriptType == DebuggerScript) {
options.setVersion(JSVERSION_LATEST);
}
JS::SourceBufferHolder srcBuf(loadInfo.mScriptTextBuf,
loadInfo.mScriptTextLength,
JS::SourceBufferHolder::GiveOwnership);
loadInfo.mScriptTextBuf = nullptr;
loadInfo.mScriptTextLength = 0;
JS::Rooted<JS::Value> unused(aCx);
if (!JS::Evaluate(aCx, options, srcBuf, &unused)) {
return true;
}
loadInfo.mExecutionResult = true;
}
return true;
}
void
ScriptExecutorRunnable::PostRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aRunResult)
{
nsTArray<ScriptLoadInfo>& loadInfos = mScriptLoader.mLoadInfos;
if (mLastIndex == loadInfos.Length() - 1) {
// All done. If anything failed then return false.
bool result = true;
for (uint32_t index = 0; index < loadInfos.Length(); index++) {
if (!loadInfos[index].mExecutionResult) {
result = false;
break;
}
}
ShutdownScriptLoader(aCx, aWorkerPrivate, result);
}
}
NS_IMETHODIMP
ScriptExecutorRunnable::Cancel()
{
if (mLastIndex == mScriptLoader.mLoadInfos.Length() - 1) {
ShutdownScriptLoader(mWorkerPrivate->GetJSContext(), mWorkerPrivate, false);
}
return MainThreadWorkerSyncRunnable::Cancel();
}
void
ScriptExecutorRunnable::ShutdownScriptLoader(JSContext* aCx,
WorkerPrivate* aWorkerPrivate,
bool aResult)
{
MOZ_ASSERT(mLastIndex == mScriptLoader.mLoadInfos.Length() - 1);
if (mIsWorkerScript && aWorkerPrivate->IsServiceWorker()) {
aWorkerPrivate->SetLoadingWorkerScript(false);
}
aWorkerPrivate->RemoveFeature(aCx, &mScriptLoader);
aWorkerPrivate->StopSyncLoop(mSyncLoopTarget, aResult);
}
bool
LoadAllScripts(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
nsTArray<ScriptLoadInfo>& aLoadInfos, bool aIsMainScript,
WorkerScriptType aWorkerScriptType)
{
aWorkerPrivate->AssertIsOnWorkerThread();
NS_ASSERTION(!aLoadInfos.IsEmpty(), "Bad arguments!");
AutoSyncLoopHolder syncLoop(aWorkerPrivate);
nsRefPtr<ScriptLoaderRunnable> loader =
new ScriptLoaderRunnable(aWorkerPrivate, syncLoop.EventTarget(),
aLoadInfos, aIsMainScript, aWorkerScriptType);
NS_ASSERTION(aLoadInfos.IsEmpty(), "Should have swapped!");
if (!aWorkerPrivate->AddFeature(aCx, loader)) {
return false;
}
if (NS_FAILED(NS_DispatchToMainThread(loader))) {
NS_ERROR("Failed to dispatch!");
aWorkerPrivate->RemoveFeature(aCx, loader);
return false;
}
return syncLoop.Run();
}
} /* anonymous namespace */
BEGIN_WORKERS_NAMESPACE
namespace scriptloader {
nsresult
ChannelFromScriptURLMainThread(nsIPrincipal* aPrincipal,
nsIURI* aBaseURI,
nsIDocument* aParentDoc,
nsILoadGroup* aLoadGroup,
const nsAString& aScriptURL,
nsIChannel** aChannel)
{
AssertIsOnMainThread();
nsCOMPtr<nsIIOService> ios(do_GetIOService());
nsIScriptSecurityManager* secMan = nsContentUtils::GetSecurityManager();
NS_ASSERTION(secMan, "This should never be null!");
return ChannelFromScriptURL(aPrincipal, aBaseURI, aParentDoc, aLoadGroup,
ios, secMan, aScriptURL, true, WorkerScript, aChannel);
}
nsresult
ChannelFromScriptURLWorkerThread(JSContext* aCx,
WorkerPrivate* aParent,
const nsAString& aScriptURL,
nsIChannel** aChannel)
{
aParent->AssertIsOnWorkerThread();
AutoSyncLoopHolder syncLoop(aParent);
nsRefPtr<ChannelGetterRunnable> getter =
new ChannelGetterRunnable(aParent, syncLoop.EventTarget(), aScriptURL,
aChannel);
if (NS_FAILED(NS_DispatchToMainThread(getter))) {
NS_ERROR("Failed to dispatch!");
return NS_ERROR_FAILURE;
}
if (!syncLoop.Run()) {
return NS_ERROR_FAILURE;
}
return getter->GetResult();
}
void ReportLoadError(JSContext* aCx, const nsAString& aURL,
nsresult aLoadResult, bool aIsMainThread)
{
NS_LossyConvertUTF16toASCII url(aURL);
switch (aLoadResult) {
case NS_BINDING_ABORTED:
// Canceled, don't set an exception.
break;
case NS_ERROR_MALFORMED_URI:
JS_ReportError(aCx, "Malformed script URI: %s", url.get());
break;
case NS_ERROR_FILE_NOT_FOUND:
case NS_ERROR_NOT_AVAILABLE:
JS_ReportError(aCx, "Script file not found: %s", url.get());
break;
case NS_ERROR_DOM_SECURITY_ERR:
case NS_ERROR_DOM_SYNTAX_ERR:
Throw(aCx, aLoadResult);
break;
default:
JS_ReportError(aCx, "Failed to load script (nsresult = 0x%x)", aLoadResult);
}
}
bool
LoadMainScript(JSContext* aCx, const nsAString& aScriptURL,
WorkerScriptType aWorkerScriptType)
{
WorkerPrivate* worker = GetWorkerPrivateFromContext(aCx);
NS_ASSERTION(worker, "This should never be null!");
nsTArray<ScriptLoadInfo> loadInfos;
ScriptLoadInfo* info = loadInfos.AppendElement();
info->mURL = aScriptURL;
return LoadAllScripts(aCx, worker, loadInfos, true, aWorkerScriptType);
}
void
Load(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
const nsTArray<nsString>& aScriptURLs, WorkerScriptType aWorkerScriptType,
ErrorResult& aRv)
{
const uint32_t urlCount = aScriptURLs.Length();
if (!urlCount) {
return;
}
if (urlCount > MAX_CONCURRENT_SCRIPTS) {
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
return;
}
nsTArray<ScriptLoadInfo> loadInfos;
loadInfos.SetLength(urlCount);
for (uint32_t index = 0; index < urlCount; index++) {
loadInfos[index].mURL = aScriptURLs[index];
}
if (!LoadAllScripts(aCx, aWorkerPrivate, loadInfos, false, aWorkerScriptType)) {
// LoadAllScripts can fail if we're shutting down.
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
}
}
} // namespace scriptloader
END_WORKERS_NAMESPACE
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