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2a7a17ae2a
gecko-dev/dom/workers/XMLHttpRequest.cpp
Steve Fink 2a7a17ae2a Bug 940724 - Move XMLHttpRequest off of the stack to silence analysis, r=bent 
--HG--
extra : rebase_source : 591b96238eddbeb88ef3f1df3728fc5d02b9229a
2013-11-19 15:27:00 -08:00

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/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
/* 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 "XMLHttpRequest.h"
#include "nsIDOMEvent.h"
#include "nsIDOMEventListener.h"
#include "nsIDOMProgressEvent.h"
#include "nsIRunnable.h"
#include "nsIVariant.h"
#include "nsIXMLHttpRequest.h"
#include "nsIXPConnect.h"
#include "jsfriendapi.h"
#include "nsContentUtils.h"
#include "nsCxPusher.h"
#include "nsEventDispatcher.h"
#include "nsJSUtils.h"
#include "nsThreadUtils.h"
#include "mozilla/dom/Exceptions.h"
#include "File.h"
#include "RuntimeService.h"
#include "WorkerPrivate.h"
#include "XMLHttpRequestUpload.h"
#include "mozilla/Attributes.h"
#include "nsComponentManagerUtils.h"
using namespace mozilla;
using namespace mozilla::dom;
USING_WORKERS_NAMESPACE
// XXX Need to figure this out...
#define UNCATCHABLE_EXCEPTION NS_ERROR_OUT_OF_MEMORY
/**
* XMLHttpRequest in workers
*
* XHR in workers is implemented by proxying calls/events/etc between the
* worker thread and an nsXMLHttpRequest on the main thread. The glue
* object here is the Proxy, which lives on both threads. All other objects
* live on either the main thread (the nsXMLHttpRequest) or the worker thread
* (the worker and XHR private objects).
*
* The main thread XHR is always operated in async mode, even for sync XHR
* in workers. Calls made on the worker thread are proxied to the main thread
* synchronously (meaning the worker thread is blocked until the call
* returns). Each proxied call spins up a sync queue, which captures any
* synchronously dispatched events and ensures that they run synchronously
* on the worker as well. Asynchronously dispatched events are posted to the
* worker thread to run asynchronously. Some of the XHR state is mirrored on
* the worker thread to avoid needing a cross-thread call on every property
* access.
*
* The XHR private is stored in the private slot of the XHR JSObject on the
* worker thread. It is destroyed when that JSObject is GCd. The private
* roots its JSObject while network activity is in progress. It also
* adds itself as a feature to the worker to give itself a chance to clean up
* if the worker goes away during an XHR call. It is important that the
* rooting and feature registration (collectively called pinning) happens at
* the proper times. If we pin for too long we can cause memory leaks or even
* shutdown hangs. If we don't pin for long enough we introduce a GC hazard.
*
* The XHR is pinned from the time Send is called to roughly the time loadend
* is received. There are some complications involved with Abort and XHR
* reuse. We maintain a counter on the main thread of how many times Send was
* called on this XHR, and we decrement the counter every time we receive a
* loadend event. When the counter reaches zero we dispatch a runnable to the
* worker thread to unpin the XHR. We only decrement the counter if the
* dispatch was successful, because the worker may no longer be accepting
* regular runnables. In the event that we reach Proxy::Teardown and there
* the outstanding Send count is still non-zero, we dispatch a control
* runnable which is guaranteed to run.
*
* NB: Some of this could probably be simplified now that we have the
* inner/outer channel ids.
*/
BEGIN_WORKERS_NAMESPACE
class Proxy MOZ_FINAL : public nsIDOMEventListener
{
public:
// Read on multiple threads.
WorkerPrivate* mWorkerPrivate;
XMLHttpRequest* mXMLHttpRequestPrivate;
// XHR Params:
bool mMozAnon;
bool mMozSystem;
// Only touched on the main thread.
nsRefPtr<nsXMLHttpRequest> mXHR;
nsCOMPtr<nsIXMLHttpRequestUpload> mXHRUpload;
uint32_t mInnerEventStreamId;
uint32_t mInnerChannelId;
uint32_t mOutstandingSendCount;
// Only touched on the worker thread.
uint32_t mOuterEventStreamId;
uint32_t mOuterChannelId;
uint64_t mLastLoaded;
uint64_t mLastTotal;
uint64_t mLastUploadLoaded;
uint64_t mLastUploadTotal;
bool mIsSyncXHR;
bool mLastLengthComputable;
bool mLastUploadLengthComputable;
bool mSeenLoadStart;
bool mSeenUploadLoadStart;
// Only touched on the main thread.
uint32_t mSyncQueueKey;
uint32_t mSyncEventResponseSyncQueueKey;
bool mUploadEventListenersAttached;
bool mMainThreadSeenLoadStart;
bool mInOpen;
public:
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIDOMEVENTLISTENER
Proxy(XMLHttpRequest* aXHRPrivate, bool aMozAnon, bool aMozSystem)
: mWorkerPrivate(nullptr), mXMLHttpRequestPrivate(aXHRPrivate),
mMozAnon(aMozAnon), mMozSystem(aMozSystem),
mInnerEventStreamId(0), mInnerChannelId(0), mOutstandingSendCount(0),
mOuterEventStreamId(0), mOuterChannelId(0), mLastLoaded(0), mLastTotal(0),
mLastUploadLoaded(0), mLastUploadTotal(0), mIsSyncXHR(false),
mLastLengthComputable(false), mLastUploadLengthComputable(false),
mSeenLoadStart(false), mSeenUploadLoadStart(false),
mSyncQueueKey(UINT32_MAX),
mSyncEventResponseSyncQueueKey(UINT32_MAX),
mUploadEventListenersAttached(false), mMainThreadSeenLoadStart(false),
mInOpen(false)
{ }
~Proxy()
{
NS_ASSERTION(!mXHR, "Still have an XHR object attached!");
NS_ASSERTION(!mXHRUpload, "Still have an XHR upload object attached!");
NS_ASSERTION(!mOutstandingSendCount, "We're dying too early!");
}
bool
Init()
{
AssertIsOnMainThread();
NS_ASSERTION(mWorkerPrivate, "Must have a worker here!");
if (!mXHR) {
nsPIDOMWindow* ownerWindow = mWorkerPrivate->GetWindow();
if (ownerWindow) {
ownerWindow = ownerWindow->GetOuterWindow();
if (!ownerWindow) {
NS_ERROR("No outer window?!");
return false;
}
nsPIDOMWindow* innerWindow = ownerWindow->GetCurrentInnerWindow();
if (mWorkerPrivate->GetWindow() != innerWindow) {
NS_WARNING("Window has navigated, cannot create XHR here.");
return false;
}
}
mXHR = new nsXMLHttpRequest();
nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(ownerWindow);
if (NS_FAILED(mXHR->Init(mWorkerPrivate->GetPrincipal(),
mWorkerPrivate->GetScriptContext(),
global, mWorkerPrivate->GetBaseURI()))) {
mXHR = nullptr;
return false;
}
mXHR->SetParameters(mMozAnon, mMozSystem);
if (NS_FAILED(mXHR->GetUpload(getter_AddRefs(mXHRUpload)))) {
mXHR = nullptr;
return false;
}
if (!AddRemoveEventListeners(false, true)) {
mXHRUpload = nullptr;
mXHR = nullptr;
return false;
}
}
return true;
}
void
Teardown();
bool
AddRemoveEventListeners(bool aUpload, bool aAdd);
void
Reset()
{
AssertIsOnMainThread();
if (mUploadEventListenersAttached) {
AddRemoveEventListeners(true, false);
}
}
uint32_t
GetSyncQueueKey()
{
AssertIsOnMainThread();
return mSyncEventResponseSyncQueueKey == UINT32_MAX ?
mSyncQueueKey :
mSyncEventResponseSyncQueueKey;
}
bool
EventsBypassSyncQueue()
{
AssertIsOnMainThread();
return mSyncQueueKey == UINT32_MAX &&
mSyncEventResponseSyncQueueKey == UINT32_MAX;
}
};
END_WORKERS_NAMESPACE
namespace {
inline void
ConvertResponseTypeToString(XMLHttpRequestResponseType aType,
nsString& aString)
{
using namespace
mozilla::dom::XMLHttpRequestResponseTypeValues;
size_t index = static_cast<size_t>(aType);
MOZ_ASSERT(index < ArrayLength(strings), "Codegen gave us a bad value!");
aString.AssignASCII(strings[index].value, strings[index].length);
}
inline XMLHttpRequestResponseType
ConvertStringToResponseType(const nsAString& aString)
{
using namespace
mozilla::dom::XMLHttpRequestResponseTypeValues;
for (size_t index = 0; index < ArrayLength(strings) - 1; index++) {
if (aString.EqualsASCII(strings[index].value, strings[index].length)) {
return static_cast<XMLHttpRequestResponseType>(index);
}
}
MOZ_CRASH("Don't know anything about this response type!");
}
enum
{
STRING_abort = 0,
STRING_error,
STRING_load,
STRING_loadstart,
STRING_progress,
STRING_timeout,
STRING_readystatechange,
STRING_loadend,
STRING_COUNT,
STRING_LAST_XHR = STRING_loadend,
STRING_LAST_EVENTTARGET = STRING_timeout
};
JS_STATIC_ASSERT(STRING_LAST_XHR >= STRING_LAST_EVENTTARGET);
JS_STATIC_ASSERT(STRING_LAST_XHR == STRING_COUNT - 1);
const char* const sEventStrings[] = {
// nsIXMLHttpRequestEventTarget event types, supported by both XHR and Upload.
"abort",
"error",
"load",
"loadstart",
"progress",
"timeout",
// nsIXMLHttpRequest event types, supported only by XHR.
"readystatechange",
"loadend",
};
JS_STATIC_ASSERT(JS_ARRAY_LENGTH(sEventStrings) == STRING_COUNT);
class MainThreadProxyRunnable : public MainThreadSyncRunnable
{
protected:
nsRefPtr<Proxy> mProxy;
public:
MainThreadProxyRunnable(WorkerPrivate* aWorkerPrivate,
ClearingBehavior aClearingBehavior, Proxy* aProxy)
: MainThreadSyncRunnable(aWorkerPrivate, aClearingBehavior,
aProxy->GetSyncQueueKey(),
aProxy->EventsBypassSyncQueue()),
mProxy(aProxy)
{ }
};
class XHRUnpinRunnable : public WorkerControlRunnable
{
XMLHttpRequest* mXMLHttpRequestPrivate;
public:
XHRUnpinRunnable(WorkerPrivate* aWorkerPrivate,
XMLHttpRequest* aXHRPrivate)
: WorkerControlRunnable(aWorkerPrivate, WorkerThread, UnchangedBusyCount),
mXMLHttpRequestPrivate(aXHRPrivate)
{ }
bool
PreDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate)
{
AssertIsOnMainThread();
return true;
}
void
PostDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aDispatchResult)
{
AssertIsOnMainThread();
}
bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate)
{
mXMLHttpRequestPrivate->Unpin();
return true;
}
};
class AsyncTeardownRunnable : public nsRunnable
{
nsRefPtr<Proxy> mProxy;
public:
AsyncTeardownRunnable(Proxy* aProxy)
{
mProxy = aProxy;
NS_ASSERTION(mProxy, "Null proxy!");
}
NS_IMETHOD Run()
{
AssertIsOnMainThread();
mProxy->Teardown();
mProxy = nullptr;
return NS_OK;
}
};
class LoadStartDetectionRunnable MOZ_FINAL : public nsIRunnable,
public nsIDOMEventListener
{
WorkerPrivate* mWorkerPrivate;
nsRefPtr<Proxy> mProxy;
nsRefPtr<nsXMLHttpRequest> mXHR;
XMLHttpRequest* mXMLHttpRequestPrivate;
nsString mEventType;
bool mReceivedLoadStart;
uint32_t mChannelId;
class ProxyCompleteRunnable : public MainThreadProxyRunnable
{
XMLHttpRequest* mXMLHttpRequestPrivate;
uint32_t mChannelId;
public:
ProxyCompleteRunnable(WorkerPrivate* aWorkerPrivate, Proxy* aProxy,
XMLHttpRequest* aXHRPrivate, uint32_t aChannelId)
: MainThreadProxyRunnable(aWorkerPrivate, RunWhenClearing, aProxy),
mXMLHttpRequestPrivate(aXHRPrivate), mChannelId(aChannelId)
{ }
bool
PreDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate)
{
AssertIsOnMainThread();
return true;
}
void
PostDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate,
bool aDispatchResult)
{
AssertIsOnMainThread();
}
bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate)
{
if (mChannelId != mProxy->mOuterChannelId) {
// Threads raced, this event is now obsolete.
return true;
}
if (mSyncQueueKey != UINT32_MAX) {
aWorkerPrivate->StopSyncLoop(mSyncQueueKey, true);
}
mXMLHttpRequestPrivate->Unpin();
return true;
}
};
public:
NS_DECL_ISUPPORTS
LoadStartDetectionRunnable(Proxy* aProxy, XMLHttpRequest* aXHRPrivate)
: mWorkerPrivate(aProxy->mWorkerPrivate), mProxy(aProxy), mXHR(aProxy->mXHR),
mXMLHttpRequestPrivate(aXHRPrivate), mReceivedLoadStart(false),
mChannelId(mProxy->mInnerChannelId)
{
AssertIsOnMainThread();
mEventType.AssignWithConversion(sEventStrings[STRING_loadstart]);
}
~LoadStartDetectionRunnable()
{
AssertIsOnMainThread();
}
bool
RegisterAndDispatch()
{
AssertIsOnMainThread();
if (NS_FAILED(mXHR->AddEventListener(mEventType, this, false, false, 2))) {
NS_WARNING("Failed to add event listener!");
return false;
}
return NS_SUCCEEDED(NS_DispatchToCurrentThread(this));
}
NS_IMETHOD
Run()
{
AssertIsOnMainThread();
if (NS_FAILED(mXHR->RemoveEventListener(mEventType, this, false))) {
NS_WARNING("Failed to remove event listener!");
}
if (!mReceivedLoadStart) {
if (mProxy->mOutstandingSendCount > 1) {
mProxy->mOutstandingSendCount--;
} else if (mProxy->mOutstandingSendCount == 1) {
mProxy->Reset();
nsRefPtr<ProxyCompleteRunnable> runnable =
new ProxyCompleteRunnable(mWorkerPrivate, mProxy,
mXMLHttpRequestPrivate,
mChannelId);
if (runnable->Dispatch(nullptr)) {
mProxy->mWorkerPrivate = nullptr;
mProxy->mOutstandingSendCount--;
}
}
}
mProxy = nullptr;
mXHR = nullptr;
mXMLHttpRequestPrivate = nullptr;
return NS_OK;
}
NS_IMETHOD
HandleEvent(nsIDOMEvent* aEvent)
{
AssertIsOnMainThread();
#ifdef DEBUG
{
nsString type;
if (NS_SUCCEEDED(aEvent->GetType(type))) {
NS_ASSERTION(type == mEventType, "Unexpected event type!");
}
else {
NS_WARNING("Failed to get event type!");
}
}
#endif
mReceivedLoadStart = true;
return NS_OK;
}
};
NS_IMPL_ISUPPORTS2(LoadStartDetectionRunnable, nsIRunnable, nsIDOMEventListener)
class EventRunnable : public MainThreadProxyRunnable
{
nsString mType;
nsString mResponseType;
JSAutoStructuredCloneBuffer mResponseBuffer;
nsTArray<nsCOMPtr<nsISupports> > mClonedObjects;
JS::Heap<JS::Value> mResponse;
nsString mResponseText;
nsCString mStatusText;
uint64_t mLoaded;
uint64_t mTotal;
uint32_t mEventStreamId;
uint32_t mStatus;
uint16_t mReadyState;
bool mUploadEvent;
bool mProgressEvent;
bool mLengthComputable;
nsresult mResponseTextResult;
nsresult mStatusResult;
nsresult mResponseResult;
public:
EventRunnable(Proxy* aProxy, bool aUploadEvent, const nsString& aType,
bool aLengthComputable, uint64_t aLoaded, uint64_t aTotal)
: MainThreadProxyRunnable(aProxy->mWorkerPrivate, SkipWhenClearing, aProxy),
mType(aType), mResponse(JSVAL_VOID), mLoaded(aLoaded), mTotal(aTotal),
mEventStreamId(aProxy->mInnerEventStreamId), mStatus(0), mReadyState(0),
mUploadEvent(aUploadEvent), mProgressEvent(true),
mLengthComputable(aLengthComputable), mResponseTextResult(NS_OK),
mStatusResult(NS_OK), mResponseResult(NS_OK)
{ }
EventRunnable(Proxy* aProxy, bool aUploadEvent, const nsString& aType)
: MainThreadProxyRunnable(aProxy->mWorkerPrivate, SkipWhenClearing, aProxy),
mType(aType), mResponse(JSVAL_VOID), mLoaded(0), mTotal(0),
mEventStreamId(aProxy->mInnerEventStreamId), mStatus(0), mReadyState(0),
mUploadEvent(aUploadEvent), mProgressEvent(false), mLengthComputable(0),
mResponseTextResult(NS_OK), mStatusResult(NS_OK), mResponseResult(NS_OK)
{ }
bool
PreDispatch(JSContext* aCx, WorkerPrivate* aWorkerPrivate)
{
nsRefPtr<nsXMLHttpRequest>& xhr = mProxy->mXHR;
NS_ASSERTION(xhr, "Must have an XHR here!");
if (NS_FAILED(xhr->GetResponseType(mResponseType))) {
NS_ERROR("This should never fail!");
}
mResponseTextResult = xhr->GetResponseText(mResponseText);
if (NS_SUCCEEDED(mResponseTextResult)) {
mResponseResult = mResponseTextResult;
if (mResponseText.IsVoid()) {
mResponse = JSVAL_NULL;
}
}
else {
JS::Rooted<JS::Value> response(aCx);
mResponseResult = xhr->GetResponse(aCx, response.address());
if (NS_SUCCEEDED(mResponseResult)) {
if (JSVAL_IS_UNIVERSAL(response)) {
mResponse = response;
}
else {
// Anything subject to GC must be cloned.
JSStructuredCloneCallbacks* callbacks =
aWorkerPrivate->IsChromeWorker() ?
ChromeWorkerStructuredCloneCallbacks(true) :
WorkerStructuredCloneCallbacks(true);
nsTArray<nsCOMPtr<nsISupports> > clonedObjects;
if (mResponseBuffer.write(aCx, response, callbacks, &clonedObjects)) {
mClonedObjects.SwapElements(clonedObjects);
}
else {
NS_WARNING("Failed to clone response!");
mResponseResult = NS_ERROR_DOM_DATA_CLONE_ERR;
}
}
}
}
mStatusResult = xhr->GetStatus(&mStatus);
xhr->GetStatusText(mStatusText);
mReadyState = xhr->ReadyState();
return true;
}
class StateDataAutoRooter : private JS::CustomAutoRooter
{
public:
explicit StateDataAutoRooter(JSContext* aCx, XMLHttpRequest::StateData* aData
MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
: CustomAutoRooter(aCx), mStateData(aData), mSkip(aCx, mStateData)
{
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
}
private:
virtual void trace(JSTracer* aTrc)
{
JS_CallHeapValueTracer(aTrc, &mStateData->mResponse,
"XMLHttpRequest::StateData::mResponse");
}
XMLHttpRequest::StateData* mStateData;
js::SkipRoot mSkip;
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
};
bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate)
{
if (mEventStreamId != mProxy->mOuterEventStreamId) {
// Threads raced, this event is now obsolete.
return true;
}
if (!mProxy->mXMLHttpRequestPrivate) {
// Object was finalized, bail.
return true;
}
if (mType.EqualsASCII(sEventStrings[STRING_loadstart])) {
if (mUploadEvent) {
mProxy->mSeenUploadLoadStart = true;
}
else {
mProxy->mSeenLoadStart = true;
}
}
else if (mType.EqualsASCII(sEventStrings[STRING_loadend])) {
if (mUploadEvent) {
mProxy->mSeenUploadLoadStart = false;
}
else {
mProxy->mSeenLoadStart = false;
}
}
else if (mType.EqualsASCII(sEventStrings[STRING_abort])) {
if ((mUploadEvent && !mProxy->mSeenUploadLoadStart) ||
(!mUploadEvent && !mProxy->mSeenLoadStart)) {
// We've already dispatched premature abort events.
return true;
}
}
else if (mType.EqualsASCII(sEventStrings[STRING_readystatechange])) {
if (mReadyState == 4 && !mUploadEvent && !mProxy->mSeenLoadStart) {
// We've already dispatched premature abort events.
return true;
}
}
if (mProgressEvent) {
// Cache these for premature abort events.
if (mUploadEvent) {
mProxy->mLastUploadLengthComputable = mLengthComputable;
mProxy->mLastUploadLoaded = mLoaded;
mProxy->mLastUploadTotal = mTotal;
}
else {
mProxy->mLastLengthComputable = mLengthComputable;
mProxy->mLastLoaded = mLoaded;
mProxy->mLastTotal = mTotal;
}
}
nsAutoPtr<XMLHttpRequest::StateData> state(new XMLHttpRequest::StateData());
StateDataAutoRooter rooter(aCx, state);
state->mResponseTextResult = mResponseTextResult;
state->mResponseText = mResponseText;
if (NS_SUCCEEDED(mResponseTextResult)) {
MOZ_ASSERT(JSVAL_IS_VOID(mResponse) || JSVAL_IS_NULL(mResponse));
state->mResponseResult = mResponseTextResult;
state->mResponse = mResponse;
}
else {
state->mResponseResult = mResponseResult;
if (NS_SUCCEEDED(mResponseResult)) {
if (mResponseBuffer.data()) {
MOZ_ASSERT(JSVAL_IS_VOID(mResponse));
JSAutoStructuredCloneBuffer responseBuffer;
mResponseBuffer.swap(responseBuffer);
JSStructuredCloneCallbacks* callbacks =
aWorkerPrivate->IsChromeWorker() ?
ChromeWorkerStructuredCloneCallbacks(false) :
WorkerStructuredCloneCallbacks(false);
nsTArray<nsCOMPtr<nsISupports> > clonedObjects;
clonedObjects.SwapElements(mClonedObjects);
JS::Rooted<JS::Value> response(aCx);
if (!responseBuffer.read(aCx, &response, callbacks, &clonedObjects)) {
return false;
}
state->mResponse = response;
}
else {
state->mResponse = mResponse;
}
}
}
state->mStatusResult = mStatusResult;
state->mStatus = mStatus;
state->mStatusText = mStatusText;
state->mReadyState = mReadyState;
XMLHttpRequest* xhr = mProxy->mXMLHttpRequestPrivate;
xhr->UpdateState(*state);
if (mUploadEvent && !xhr->GetUploadObjectNoCreate()) {
return true;
}
JS::Rooted<JSString*> type(aCx, JS_NewUCStringCopyN(aCx, mType.get(), mType.Length()));
if (!type) {
return false;
}
nsXHREventTarget* target;
if (mUploadEvent) {
target = xhr->GetUploadObjectNoCreate();
}
else {
target = xhr;
}
MOZ_ASSERT(target);
nsCOMPtr<nsIDOMEvent> event;
if (mProgressEvent) {
NS_NewDOMProgressEvent(getter_AddRefs(event), target, nullptr, nullptr);
nsCOMPtr<nsIDOMProgressEvent> progress = do_QueryInterface(event);
if (progress) {
progress->InitProgressEvent(mType, false, false, mLengthComputable,
mLoaded, mTotal);
}
}
else {
NS_NewDOMEvent(getter_AddRefs(event), target, nullptr, nullptr);
if (event) {
event->InitEvent(mType, false, false);
}
}
if (!event) {
return false;
}
event->SetTrusted(true);
target->DispatchDOMEvent(nullptr, event, nullptr, nullptr);
// After firing the event set mResponse to JSVAL_NULL for chunked response
// types.
if (StringBeginsWith(mResponseType, NS_LITERAL_STRING("moz-chunked-"))) {
xhr->NullResponseText();
}
return true;
}
};
class WorkerThreadProxySyncRunnable : public nsRunnable
{
protected:
WorkerPrivate* mWorkerPrivate;
nsRefPtr<Proxy> mProxy;
uint32_t mSyncQueueKey;
private:
class ResponseRunnable : public MainThreadProxyRunnable
{
uint32_t mSyncQueueKey;
nsresult mErrorCode;
public:
ResponseRunnable(WorkerPrivate* aWorkerPrivate, Proxy* aProxy,
uint32_t aSyncQueueKey, nsresult aErrorCode)
: MainThreadProxyRunnable(aWorkerPrivate, SkipWhenClearing, aProxy),
mSyncQueueKey(aSyncQueueKey), mErrorCode(aErrorCode)
{
NS_ASSERTION(aProxy, "Don't hand me a null proxy!");
}
bool
WorkerRun(JSContext* aCx, WorkerPrivate* aWorkerPrivate)
{
if (NS_FAILED(mErrorCode)) {
Throw(aCx, mErrorCode);
aWorkerPrivate->StopSyncLoop(mSyncQueueKey, false);
}
else {
aWorkerPrivate->StopSyncLoop(mSyncQueueKey, true);
}
return true;
}
};
public:
WorkerThreadProxySyncRunnable(WorkerPrivate* aWorkerPrivate, Proxy* aProxy)
: mWorkerPrivate(aWorkerPrivate), mProxy(aProxy), mSyncQueueKey(0)
{
mWorkerPrivate->AssertIsOnWorkerThread();
NS_ASSERTION(aProxy, "Don't hand me a null proxy!");
}
bool
Dispatch(JSContext* aCx)
{
mWorkerPrivate->AssertIsOnWorkerThread();
AutoSyncLoopHolder syncLoop(mWorkerPrivate);
mSyncQueueKey = syncLoop.SyncQueueKey();
if (NS_FAILED(NS_DispatchToMainThread(this, NS_DISPATCH_NORMAL))) {
JS_ReportError(aCx, "Failed to dispatch to main thread!");
return false;
}
return syncLoop.RunAndForget(aCx);
}
virtual nsresult
MainThreadRun() = 0;
NS_IMETHOD
Run()
{
AssertIsOnMainThread();
uint32_t oldSyncQueueKey = mProxy->mSyncEventResponseSyncQueueKey;
mProxy->mSyncEventResponseSyncQueueKey = mSyncQueueKey;
nsresult rv = MainThreadRun();
nsRefPtr<ResponseRunnable> response =
new ResponseRunnable(mWorkerPrivate, mProxy, mSyncQueueKey, rv);
if (!response->Dispatch(nullptr)) {
NS_WARNING("Failed to dispatch response!");
}
mProxy->mSyncEventResponseSyncQueueKey = oldSyncQueueKey;
return NS_OK;
}
};
class SyncTeardownRunnable : public WorkerThreadProxySyncRunnable
{
public:
SyncTeardownRunnable(WorkerPrivate* aWorkerPrivate, Proxy* aProxy)
: WorkerThreadProxySyncRunnable(aWorkerPrivate, aProxy)
{
MOZ_ASSERT(aWorkerPrivate);
MOZ_ASSERT(aProxy);
}
virtual nsresult
MainThreadRun()
{
AssertIsOnMainThread();
mProxy->Teardown();
return NS_OK;
}
};
class SetBackgroundRequestRunnable : public WorkerThreadProxySyncRunnable
{
bool mValue;
public:
SetBackgroundRequestRunnable(WorkerPrivate* aWorkerPrivate, Proxy* aProxy,
bool aValue)
: WorkerThreadProxySyncRunnable(aWorkerPrivate, aProxy), mValue(aValue)
{ }
nsresult
MainThreadRun()
{
return mProxy->mXHR->SetMozBackgroundRequest(mValue);
}
};
class SetWithCredentialsRunnable : public WorkerThreadProxySyncRunnable
{
bool mValue;
public:
SetWithCredentialsRunnable(WorkerPrivate* aWorkerPrivate, Proxy* aProxy,
bool aValue)
: WorkerThreadProxySyncRunnable(aWorkerPrivate, aProxy), mValue(aValue)
{ }
nsresult
MainThreadRun()
{
return mProxy->mXHR->SetWithCredentials(mValue);
}
};
class SetResponseTypeRunnable : public WorkerThreadProxySyncRunnable
{
nsString mResponseType;
public:
SetResponseTypeRunnable(WorkerPrivate* aWorkerPrivate, Proxy* aProxy,
const nsAString& aResponseType)
: WorkerThreadProxySyncRunnable(aWorkerPrivate, aProxy),
mResponseType(aResponseType)
{ }
nsresult
MainThreadRun()
{
nsresult rv = mProxy->mXHR->SetResponseType(mResponseType);
mResponseType.Truncate();
if (NS_SUCCEEDED(rv)) {
rv = mProxy->mXHR->GetResponseType(mResponseType);
}
return rv;
}
void
GetResponseType(nsAString& aResponseType) {
aResponseType.Assign(mResponseType);
}
};
class SetTimeoutRunnable : public WorkerThreadProxySyncRunnable
{
uint32_t mTimeout;
public:
SetTimeoutRunnable(WorkerPrivate* aWorkerPrivate, Proxy* aProxy,
uint32_t aTimeout)
: WorkerThreadProxySyncRunnable(aWorkerPrivate, aProxy),
mTimeout(aTimeout)
{ }
nsresult
MainThreadRun()
{
return mProxy->mXHR->SetTimeout(mTimeout);
}
};
class AbortRunnable : public WorkerThreadProxySyncRunnable
{
public:
AbortRunnable(WorkerPrivate* aWorkerPrivate, Proxy* aProxy)
: WorkerThreadProxySyncRunnable(aWorkerPrivate, aProxy)
{ }
nsresult
MainThreadRun()
{
mProxy->mInnerEventStreamId++;
WorkerPrivate* oldWorker = mProxy->mWorkerPrivate;
mProxy->mWorkerPrivate = mWorkerPrivate;
mProxy->mXHR->Abort();
mProxy->mWorkerPrivate = oldWorker;
mProxy->Reset();
return NS_OK;
}
};
class GetAllResponseHeadersRunnable : public WorkerThreadProxySyncRunnable
{
nsCString& mResponseHeaders;
public:
GetAllResponseHeadersRunnable(WorkerPrivate* aWorkerPrivate, Proxy* aProxy,
nsCString& aResponseHeaders)
: WorkerThreadProxySyncRunnable(aWorkerPrivate, aProxy),
mResponseHeaders(aResponseHeaders)
{ }
nsresult
MainThreadRun()
{
mProxy->mXHR->GetAllResponseHeaders(mResponseHeaders);
return NS_OK;
}
};
class GetResponseHeaderRunnable : public WorkerThreadProxySyncRunnable
{
const nsCString mHeader;
nsCString& mValue;
public:
GetResponseHeaderRunnable(WorkerPrivate* aWorkerPrivate, Proxy* aProxy,
const nsACString& aHeader, nsCString& aValue)
: WorkerThreadProxySyncRunnable(aWorkerPrivate, aProxy), mHeader(aHeader),
mValue(aValue)
{ }
nsresult
MainThreadRun()
{
return mProxy->mXHR->GetResponseHeader(mHeader, mValue);
}
};
class OpenRunnable : public WorkerThreadProxySyncRunnable
{
nsCString mMethod;
nsString mURL;
Optional<nsAString> mUser;
nsString mUserStr;
Optional<nsAString> mPassword;
nsString mPasswordStr;
bool mBackgroundRequest;
bool mWithCredentials;
uint32_t mTimeout;
public:
OpenRunnable(WorkerPrivate* aWorkerPrivate, Proxy* aProxy,
const nsACString& aMethod, const nsAString& aURL,
const Optional<nsAString>& aUser,
const Optional<nsAString>& aPassword,
bool aBackgroundRequest, bool aWithCredentials,
uint32_t aTimeout)
: WorkerThreadProxySyncRunnable(aWorkerPrivate, aProxy), mMethod(aMethod),
mURL(aURL),
mBackgroundRequest(aBackgroundRequest), mWithCredentials(aWithCredentials),
mTimeout(aTimeout)
{
if (aUser.WasPassed()) {
mUserStr = aUser.Value();
mUser = &mUserStr;
}
if (aPassword.WasPassed()) {
mPasswordStr = aPassword.Value();
mPassword = &mPasswordStr;
}
}
nsresult
MainThreadRun()
{
WorkerPrivate* oldWorker = mProxy->mWorkerPrivate;
mProxy->mWorkerPrivate = mWorkerPrivate;
nsresult rv = MainThreadRunInternal();
mProxy->mWorkerPrivate = oldWorker;
return rv;
}
nsresult
MainThreadRunInternal()
{
if (!mProxy->Init()) {
return NS_ERROR_DOM_INVALID_STATE_ERR;
}
nsresult rv;
if (mBackgroundRequest) {
rv = mProxy->mXHR->SetMozBackgroundRequest(mBackgroundRequest);
NS_ENSURE_SUCCESS(rv, rv);
}
if (mWithCredentials) {
rv = mProxy->mXHR->SetWithCredentials(mWithCredentials);
NS_ENSURE_SUCCESS(rv, rv);
}
if (mTimeout) {
rv = mProxy->mXHR->SetTimeout(mTimeout);
NS_ENSURE_SUCCESS(rv, rv);
}
NS_ASSERTION(!mProxy->mInOpen, "Reentrancy is bad!");
mProxy->mInOpen = true;
ErrorResult rv2;
mProxy->mXHR->Open(mMethod, mURL, true, mUser, mPassword, rv2);
NS_ASSERTION(mProxy->mInOpen, "Reentrancy is bad!");
mProxy->mInOpen = false;
if (rv2.Failed()) {
return rv2.ErrorCode();
}
rv = mProxy->mXHR->SetResponseType(NS_LITERAL_STRING("text"));
return rv;
}
};
class SendRunnable : public WorkerThreadProxySyncRunnable
{
nsString mStringBody;
JSAutoStructuredCloneBuffer mBody;
nsTArray<nsCOMPtr<nsISupports> > mClonedObjects;
uint32_t mSyncQueueKey;
bool mHasUploadListeners;
public:
SendRunnable(WorkerPrivate* aWorkerPrivate, Proxy* aProxy,
const nsAString& aStringBody, JSAutoStructuredCloneBuffer& aBody,
nsTArray<nsCOMPtr<nsISupports> >& aClonedObjects,
uint32_t aSyncQueueKey, bool aHasUploadListeners)
: WorkerThreadProxySyncRunnable(aWorkerPrivate, aProxy),
mStringBody(aStringBody), mSyncQueueKey(aSyncQueueKey),
mHasUploadListeners(aHasUploadListeners)
{
mBody.swap(aBody);
mClonedObjects.SwapElements(aClonedObjects);
}
nsresult
MainThreadRun()
{
nsCOMPtr<nsIVariant> variant;
if (mBody.data()) {
AutoSafeJSContext cx;
JSAutoRequest ar(cx);
nsIXPConnect* xpc = nsContentUtils::XPConnect();
NS_ASSERTION(xpc, "This should never be null!");
nsresult rv = NS_OK;
JSStructuredCloneCallbacks* callbacks =
mWorkerPrivate->IsChromeWorker() ?
ChromeWorkerStructuredCloneCallbacks(true) :
WorkerStructuredCloneCallbacks(true);
JS::Rooted<JS::Value> body(cx);
if (mBody.read(cx, &body, callbacks, &mClonedObjects)) {
if (NS_FAILED(xpc->JSValToVariant(cx, body.address(),
getter_AddRefs(variant)))) {
rv = NS_ERROR_DOM_INVALID_STATE_ERR;
}
}
else {
rv = NS_ERROR_DOM_DATA_CLONE_ERR;
}
mBody.clear();
mClonedObjects.Clear();
NS_ENSURE_SUCCESS(rv, rv);
}
else {
nsCOMPtr<nsIWritableVariant> wvariant =
do_CreateInstance(NS_VARIANT_CONTRACTID);
NS_ENSURE_TRUE(wvariant, NS_ERROR_UNEXPECTED);
if (NS_FAILED(wvariant->SetAsAString(mStringBody))) {
NS_ERROR("This should never fail!");
}
variant = wvariant;
}
NS_ASSERTION(!mProxy->mWorkerPrivate, "Should be null!");
mProxy->mWorkerPrivate = mWorkerPrivate;
NS_ASSERTION(mProxy->mSyncQueueKey == UINT32_MAX, "Should be unset!");
mProxy->mSyncQueueKey = mSyncQueueKey;
if (mHasUploadListeners) {
NS_ASSERTION(!mProxy->mUploadEventListenersAttached, "Huh?!");
if (!mProxy->AddRemoveEventListeners(true, true)) {
NS_ERROR("This should never fail!");
}
}
mProxy->mInnerChannelId++;
nsresult rv = mProxy->mXHR->Send(variant);
if (NS_SUCCEEDED(rv)) {
mProxy->mOutstandingSendCount++;
if (!mHasUploadListeners) {
NS_ASSERTION(!mProxy->mUploadEventListenersAttached, "Huh?!");
if (!mProxy->AddRemoveEventListeners(true, true)) {
NS_ERROR("This should never fail!");
}
}
}
return rv;
}
};
class SetRequestHeaderRunnable : public WorkerThreadProxySyncRunnable
{
nsCString mHeader;
nsCString mValue;
public:
SetRequestHeaderRunnable(WorkerPrivate* aWorkerPrivate, Proxy* aProxy,
const nsACString& aHeader, const nsACString& aValue)
: WorkerThreadProxySyncRunnable(aWorkerPrivate, aProxy), mHeader(aHeader),
mValue(aValue)
{ }
nsresult
MainThreadRun()
{
return mProxy->mXHR->SetRequestHeader(mHeader, mValue);
}
};
class OverrideMimeTypeRunnable : public WorkerThreadProxySyncRunnable
{
nsString mMimeType;
public:
OverrideMimeTypeRunnable(WorkerPrivate* aWorkerPrivate, Proxy* aProxy,
const nsAString& aMimeType)
: WorkerThreadProxySyncRunnable(aWorkerPrivate, aProxy), mMimeType(aMimeType)
{ }
nsresult
MainThreadRun()
{
mProxy->mXHR->OverrideMimeType(mMimeType);
return NS_OK;
}
};
class AutoUnpinXHR
{
public:
AutoUnpinXHR(XMLHttpRequest* aXMLHttpRequestPrivate)
: mXMLHttpRequestPrivate(aXMLHttpRequestPrivate)
{
MOZ_ASSERT(aXMLHttpRequestPrivate);
}
~AutoUnpinXHR()
{
if (mXMLHttpRequestPrivate) {
mXMLHttpRequestPrivate->Unpin();
}
}
void Clear()
{
mXMLHttpRequestPrivate = nullptr;
}
private:
XMLHttpRequest* mXMLHttpRequestPrivate;
};
} // anonymous namespace
void
Proxy::Teardown()
{
AssertIsOnMainThread();
if (mXHR) {
Reset();
// NB: We are intentionally dropping events coming from xhr.abort on the
// floor.
AddRemoveEventListeners(false, false);
mXHR->Abort();
if (mOutstandingSendCount) {
nsRefPtr<XHRUnpinRunnable> runnable =
new XHRUnpinRunnable(mWorkerPrivate, mXMLHttpRequestPrivate);
if (!runnable->Dispatch(nullptr)) {
NS_RUNTIMEABORT("We're going to hang at shutdown anyways.");
}
mWorkerPrivate = nullptr;
mOutstandingSendCount = 0;
}
mXHRUpload = nullptr;
mXHR = nullptr;
}
}
bool
Proxy::AddRemoveEventListeners(bool aUpload, bool aAdd)
{
AssertIsOnMainThread();
NS_ASSERTION(!aUpload ||
(mUploadEventListenersAttached && !aAdd) ||
(!mUploadEventListenersAttached && aAdd),
"Messed up logic for upload listeners!");
nsCOMPtr<nsIDOMEventTarget> target =
aUpload ?
do_QueryInterface(mXHRUpload) :
do_QueryInterface(static_cast<nsIXMLHttpRequest*>(mXHR.get()));
NS_ASSERTION(target, "This should never fail!");
uint32_t lastEventType = aUpload ? STRING_LAST_EVENTTARGET : STRING_LAST_XHR;
nsAutoString eventType;
for (uint32_t index = 0; index <= lastEventType; index++) {
eventType = NS_ConvertASCIItoUTF16(sEventStrings[index]);
if (aAdd) {
if (NS_FAILED(target->AddEventListener(eventType, this, false))) {
return false;
}
}
else if (NS_FAILED(target->RemoveEventListener(eventType, this, false))) {
return false;
}
}
if (aUpload) {
mUploadEventListenersAttached = aAdd;
}
return true;
}
NS_IMPL_ISUPPORTS1(Proxy, nsIDOMEventListener)
NS_IMETHODIMP
Proxy::HandleEvent(nsIDOMEvent* aEvent)
{
AssertIsOnMainThread();
if (!mWorkerPrivate || !mXMLHttpRequestPrivate) {
NS_ERROR("Shouldn't get here!");
return NS_OK;
}
nsString type;
if (NS_FAILED(aEvent->GetType(type))) {
NS_WARNING("Failed to get event type!");
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIDOMEventTarget> target;
if (NS_FAILED(aEvent->GetTarget(getter_AddRefs(target)))) {
NS_WARNING("Failed to get target!");
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsIXMLHttpRequestUpload> uploadTarget = do_QueryInterface(target);
nsCOMPtr<nsIDOMProgressEvent> progressEvent = do_QueryInterface(aEvent);
nsRefPtr<EventRunnable> runnable;
if (mInOpen && type.EqualsASCII(sEventStrings[STRING_readystatechange])) {
uint16_t readyState = 0;
if (NS_SUCCEEDED(mXHR->GetReadyState(&readyState)) &&
readyState == nsIXMLHttpRequest::OPENED) {
mInnerEventStreamId++;
}
}
if (progressEvent) {
bool lengthComputable;
uint64_t loaded, total;
if (NS_FAILED(progressEvent->GetLengthComputable(&lengthComputable)) ||
NS_FAILED(progressEvent->GetLoaded(&loaded)) ||
NS_FAILED(progressEvent->GetTotal(&total))) {
NS_WARNING("Bad progress event!");
return NS_ERROR_FAILURE;
}
runnable = new EventRunnable(this, !!uploadTarget, type, lengthComputable,
loaded, total);
}
else {
runnable = new EventRunnable(this, !!uploadTarget, type);
}
{
AutoSafeJSContext cx;
JSAutoRequest ar(cx);
runnable->Dispatch(cx);
}
if (!uploadTarget) {
if (type.EqualsASCII(sEventStrings[STRING_loadstart])) {
NS_ASSERTION(!mMainThreadSeenLoadStart, "Huh?!");
mMainThreadSeenLoadStart = true;
}
else if (mMainThreadSeenLoadStart &&
type.EqualsASCII(sEventStrings[STRING_loadend])) {
mMainThreadSeenLoadStart = false;
nsRefPtr<LoadStartDetectionRunnable> runnable =
new LoadStartDetectionRunnable(this, mXMLHttpRequestPrivate);
if (NS_FAILED(NS_DispatchToCurrentThread(runnable))) {
NS_WARNING("Failed to dispatch LoadStartDetectionRunnable!");
}
}
}
return NS_OK;
}
XMLHttpRequest::XMLHttpRequest(WorkerPrivate* aWorkerPrivate)
: mWorkerPrivate(aWorkerPrivate),
mResponseType(XMLHttpRequestResponseType::Text), mTimeout(0),
mRooted(false), mBackgroundRequest(false), mWithCredentials(false),
mCanceled(false), mMozAnon(false), mMozSystem(false)
{
mWorkerPrivate->AssertIsOnWorkerThread();
SetIsDOMBinding();
}
XMLHttpRequest::~XMLHttpRequest()
{
mWorkerPrivate->AssertIsOnWorkerThread();
ReleaseProxy(XHRIsGoingAway);
MOZ_ASSERT(!mRooted);
mozilla::DropJSObjects(this);
}
NS_IMPL_ADDREF_INHERITED(XMLHttpRequest, nsXHREventTarget)
NS_IMPL_RELEASE_INHERITED(XMLHttpRequest, nsXHREventTarget)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(XMLHttpRequest)
NS_INTERFACE_MAP_END_INHERITING(nsXHREventTarget)
NS_IMPL_CYCLE_COLLECTION_CLASS(XMLHttpRequest)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(XMLHttpRequest,
nsXHREventTarget)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mUpload)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(XMLHttpRequest,
nsXHREventTarget)
tmp->ReleaseProxy(XHRIsGoingAway);
NS_IMPL_CYCLE_COLLECTION_UNLINK(mUpload)
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(XMLHttpRequest,
nsXHREventTarget)
NS_IMPL_CYCLE_COLLECTION_TRACE_JSVAL_MEMBER_CALLBACK(mStateData.mResponse)
NS_IMPL_CYCLE_COLLECTION_TRACE_END
JSObject*
XMLHttpRequest::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aScope)
{
return XMLHttpRequestBinding_workers::Wrap(aCx, aScope, this);
}
// static
already_AddRefed<XMLHttpRequest>
XMLHttpRequest::Constructor(const GlobalObject& aGlobal,
const MozXMLHttpRequestParameters& aParams,
ErrorResult& aRv)
{
JSContext* cx = aGlobal.GetContext();
WorkerPrivate* workerPrivate = GetWorkerPrivateFromContext(cx);
MOZ_ASSERT(workerPrivate);
nsRefPtr<XMLHttpRequest> xhr = new XMLHttpRequest(workerPrivate);
if (workerPrivate->XHRParamsAllowed()) {
xhr->mMozAnon = aParams.mMozAnon;
xhr->mMozSystem = aParams.mMozSystem;
}
return xhr.forget();
}
void
XMLHttpRequest::ReleaseProxy(ReleaseType aType)
{
// Can't assert that we're on the worker thread here because mWorkerPrivate
// may be gone.
if (mProxy) {
if (aType == XHRIsGoingAway) {
// We're in a GC finalizer, so we can't do a sync call here (and we don't
// need to).
nsRefPtr<AsyncTeardownRunnable> runnable =
new AsyncTeardownRunnable(mProxy);
mProxy = nullptr;
if (NS_FAILED(NS_DispatchToMainThread(runnable))) {
NS_ERROR("Failed to dispatch teardown runnable!");
}
} else {
// This isn't necessary if the worker is going away or the XHR is going
// away.
if (aType == Default) {
// Don't let any more events run.
mProxy->mOuterEventStreamId++;
}
// We need to make a sync call here.
nsRefPtr<SyncTeardownRunnable> runnable =
new SyncTeardownRunnable(mWorkerPrivate, mProxy);
mProxy = nullptr;
if (!runnable->Dispatch(nullptr)) {
NS_ERROR("Failed to dispatch teardown runnable!");
}
}
}
}
void
XMLHttpRequest::MaybePin(ErrorResult& aRv)
{
mWorkerPrivate->AssertIsOnWorkerThread();
if (mRooted) {
return;
}
JSContext* cx = GetCurrentThreadJSContext();
if (!mWorkerPrivate->AddFeature(cx, this)) {
return;
}
NS_ADDREF_THIS();
mRooted = true;
}
void
XMLHttpRequest::MaybeDispatchPrematureAbortEvents(ErrorResult& aRv)
{
mWorkerPrivate->AssertIsOnWorkerThread();
MOZ_ASSERT(mProxy);
mStateData.mReadyState = 4;
if (mProxy->mSeenUploadLoadStart) {
MOZ_ASSERT(mUpload);
DispatchPrematureAbortEvent(mUpload, NS_LITERAL_STRING("abort"), true,
aRv);
if (aRv.Failed()) {
return;
}
DispatchPrematureAbortEvent(mUpload, NS_LITERAL_STRING("loadend"), true,
aRv);
if (aRv.Failed()) {
return;
}
mProxy->mSeenUploadLoadStart = false;
}
if (mProxy->mSeenLoadStart) {
DispatchPrematureAbortEvent(this, NS_LITERAL_STRING("readystatechange"),
false, aRv);
if (aRv.Failed()) {
return;
}
DispatchPrematureAbortEvent(this, NS_LITERAL_STRING("abort"), false, aRv);
if (aRv.Failed()) {
return;
}
DispatchPrematureAbortEvent(this, NS_LITERAL_STRING("loadend"), false,
aRv);
if (aRv.Failed()) {
return;
}
mProxy->mSeenLoadStart = false;
}
}
void
XMLHttpRequest::DispatchPrematureAbortEvent(EventTarget* aTarget,
const nsAString& aEventType,
bool aUploadTarget,
ErrorResult& aRv)
{
mWorkerPrivate->AssertIsOnWorkerThread();
MOZ_ASSERT(aTarget);
if (!mProxy) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
nsCOMPtr<nsIDOMEvent> event;
if (aEventType.EqualsLiteral("readystatechange")) {
NS_NewDOMEvent(getter_AddRefs(event), aTarget, nullptr, nullptr);
if (event) {
event->InitEvent(aEventType, false, false);
}
}
else {
NS_NewDOMProgressEvent(getter_AddRefs(event), aTarget, nullptr, nullptr);
nsCOMPtr<nsIDOMProgressEvent> progress = do_QueryInterface(event);
if (progress) {
if (aUploadTarget) {
progress->InitProgressEvent(aEventType, false, false,
mProxy->mLastUploadLengthComputable,
mProxy->mLastUploadLoaded,
mProxy->mLastUploadTotal);
}
else {
progress->InitProgressEvent(aEventType, false, false,
mProxy->mLastLengthComputable,
mProxy->mLastLoaded,
mProxy->mLastTotal);
}
}
}
if (!event) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
event->SetTrusted(true);
aTarget->DispatchDOMEvent(nullptr, event, nullptr, nullptr);
}
void
XMLHttpRequest::Unpin()
{
mWorkerPrivate->AssertIsOnWorkerThread();
MOZ_ASSERT(mRooted, "Mismatched calls to Unpin!");
JSContext* cx = GetCurrentThreadJSContext();
mWorkerPrivate->RemoveFeature(cx, this);
mRooted = false;
NS_RELEASE_THIS();
}
void
XMLHttpRequest::SendInternal(const nsAString& aStringBody,
JSAutoStructuredCloneBuffer& aBody,
nsTArray<nsCOMPtr<nsISupports> >& aClonedObjects,
ErrorResult& aRv)
{
mWorkerPrivate->AssertIsOnWorkerThread();
bool hasUploadListeners = mUpload ? mUpload->HasListeners() : false;
MaybePin(aRv);
if (aRv.Failed()) {
return;
}
AutoUnpinXHR autoUnpin(this);
Maybe<AutoSyncLoopHolder> autoSyncLoop;
uint32_t syncQueueKey = UINT32_MAX;
bool isSyncXHR = mProxy->mIsSyncXHR;
if (isSyncXHR) {
autoSyncLoop.construct(mWorkerPrivate);
syncQueueKey = autoSyncLoop.ref().SyncQueueKey();
}
mProxy->mOuterChannelId++;
JSContext* cx = mWorkerPrivate->GetJSContext();
nsRefPtr<SendRunnable> runnable =
new SendRunnable(mWorkerPrivate, mProxy, aStringBody, aBody,
aClonedObjects, syncQueueKey, hasUploadListeners);
if (!runnable->Dispatch(cx)) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
if (!isSyncXHR) {
autoUnpin.Clear();
MOZ_ASSERT(autoSyncLoop.empty());
return;
}
// If our sync XHR was canceled during the send call the worker is going
// away. We have no idea how far through the send call we got. There may
// be a ProxyCompleteRunnable in the sync loop, but rather than run the loop
// to get it we just let our RAII helpers clean up.
if (mCanceled) {
return;
}
autoUnpin.Clear();
if (!autoSyncLoop.ref().RunAndForget(cx)) {
aRv.Throw(NS_ERROR_FAILURE);
}
}
bool
XMLHttpRequest::Notify(JSContext* aCx, Status aStatus)
{
mWorkerPrivate->AssertIsOnWorkerThread();
MOZ_ASSERT(mWorkerPrivate->GetJSContext() == aCx);
if (aStatus >= Canceling && !mCanceled) {
mCanceled = true;
ReleaseProxy(WorkerIsGoingAway);
}
return true;
}
void
XMLHttpRequest::Open(const nsACString& aMethod, const nsAString& aUrl,
bool aAsync, const Optional<nsAString>& aUser,
const Optional<nsAString>& aPassword, ErrorResult& aRv)
{
mWorkerPrivate->AssertIsOnWorkerThread();
if (mCanceled) {
aRv.Throw(UNCATCHABLE_EXCEPTION);
return;
}
if (mProxy) {
MaybeDispatchPrematureAbortEvents(aRv);
if (aRv.Failed()) {
return;
}
}
else {
mProxy = new Proxy(this, mMozAnon, mMozSystem);
}
mProxy->mOuterEventStreamId++;
nsRefPtr<OpenRunnable> runnable =
new OpenRunnable(mWorkerPrivate, mProxy, aMethod, aUrl, aUser, aPassword,
mBackgroundRequest, mWithCredentials,
mTimeout);
if (!runnable->Dispatch(mWorkerPrivate->GetJSContext())) {
ReleaseProxy();
aRv.Throw(NS_ERROR_FAILURE);
return;
}
mProxy->mIsSyncXHR = !aAsync;
}
void
XMLHttpRequest::SetRequestHeader(const nsACString& aHeader,
const nsACString& aValue, ErrorResult& aRv)
{
mWorkerPrivate->AssertIsOnWorkerThread();
if (mCanceled) {
aRv.Throw(UNCATCHABLE_EXCEPTION);
return;
}
if (!mProxy) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
nsRefPtr<SetRequestHeaderRunnable> runnable =
new SetRequestHeaderRunnable(mWorkerPrivate, mProxy, aHeader, aValue);
if (!runnable->Dispatch(mWorkerPrivate->GetJSContext())) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
}
void
XMLHttpRequest::SetTimeout(uint32_t aTimeout, ErrorResult& aRv)
{
mWorkerPrivate->AssertIsOnWorkerThread();
if (mCanceled) {
aRv.Throw(UNCATCHABLE_EXCEPTION);
return;
}
mTimeout = aTimeout;
if (!mProxy) {
// Open may not have been called yet, in which case we'll handle the
// timeout in OpenRunnable.
return;
}
nsRefPtr<SetTimeoutRunnable> runnable =
new SetTimeoutRunnable(mWorkerPrivate, mProxy, aTimeout);
if (!runnable->Dispatch(mWorkerPrivate->GetJSContext())) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
}
void
XMLHttpRequest::SetWithCredentials(bool aWithCredentials, ErrorResult& aRv)
{
mWorkerPrivate->AssertIsOnWorkerThread();
if (mCanceled) {
aRv.Throw(UNCATCHABLE_EXCEPTION);
return;
}
mWithCredentials = aWithCredentials;
if (!mProxy) {
// Open may not have been called yet, in which case we'll handle the
// credentials in OpenRunnable.
return;
}
nsRefPtr<SetWithCredentialsRunnable> runnable =
new SetWithCredentialsRunnable(mWorkerPrivate, mProxy, aWithCredentials);
if (!runnable->Dispatch(mWorkerPrivate->GetJSContext())) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
}
void
XMLHttpRequest::SetMozBackgroundRequest(bool aBackgroundRequest,
ErrorResult& aRv)
{
mWorkerPrivate->AssertIsOnWorkerThread();
if (mCanceled) {
aRv.Throw(UNCATCHABLE_EXCEPTION);
return;
}
mBackgroundRequest = aBackgroundRequest;
if (!mProxy) {
// Open may not have been called yet, in which case we'll handle the
// background request in OpenRunnable.
return;
}
nsRefPtr<SetBackgroundRequestRunnable> runnable =
new SetBackgroundRequestRunnable(mWorkerPrivate, mProxy,
aBackgroundRequest);
if (!runnable->Dispatch(mWorkerPrivate->GetJSContext())) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
}
XMLHttpRequestUpload*
XMLHttpRequest::GetUpload(ErrorResult& aRv)
{
mWorkerPrivate->AssertIsOnWorkerThread();
if (mCanceled) {
aRv.Throw(UNCATCHABLE_EXCEPTION);
return nullptr;
}
if (!mUpload) {
mUpload = XMLHttpRequestUpload::Create(this);
if (!mUpload) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
}
return mUpload;
}
void
XMLHttpRequest::Send(ErrorResult& aRv)
{
mWorkerPrivate->AssertIsOnWorkerThread();
if (mCanceled) {
aRv.Throw(UNCATCHABLE_EXCEPTION);
return;
}
if (!mProxy) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
// Nothing to clone.
JSAutoStructuredCloneBuffer buffer;
nsTArray<nsCOMPtr<nsISupports> > clonedObjects;
SendInternal(NullString(), buffer, clonedObjects, aRv);
}
void
XMLHttpRequest::Send(const nsAString& aBody, ErrorResult& aRv)
{
mWorkerPrivate->AssertIsOnWorkerThread();
if (mCanceled) {
aRv.Throw(UNCATCHABLE_EXCEPTION);
return;
}
if (!mProxy) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
// Nothing to clone.
JSAutoStructuredCloneBuffer buffer;
nsTArray<nsCOMPtr<nsISupports> > clonedObjects;
SendInternal(aBody, buffer, clonedObjects, aRv);
}
void
XMLHttpRequest::Send(JSObject* aBody, ErrorResult& aRv)
{
mWorkerPrivate->AssertIsOnWorkerThread();
MOZ_ASSERT(aBody);
if (mCanceled) {
aRv.Throw(UNCATCHABLE_EXCEPTION);
return;
}
if (!mProxy) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
JSContext* cx = mWorkerPrivate->GetJSContext();
JS::Rooted<JS::Value> valToClone(cx);
if (JS_IsArrayBufferObject(aBody) || JS_IsArrayBufferViewObject(aBody) ||
file::GetDOMBlobFromJSObject(aBody)) {
valToClone.setObject(*aBody);
}
else {
JS::Rooted<JS::Value> obj(cx, JS::ObjectValue(*aBody));
JSString* bodyStr = JS::ToString(cx, obj);
if (!bodyStr) {
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
return;
}
valToClone.setString(bodyStr);
}
JSStructuredCloneCallbacks* callbacks =
mWorkerPrivate->IsChromeWorker() ?
ChromeWorkerStructuredCloneCallbacks(false) :
WorkerStructuredCloneCallbacks(false);
nsTArray<nsCOMPtr<nsISupports> > clonedObjects;
JSAutoStructuredCloneBuffer buffer;
if (!buffer.write(cx, valToClone, callbacks, &clonedObjects)) {
aRv.Throw(NS_ERROR_DOM_DATA_CLONE_ERR);
return;
}
SendInternal(EmptyString(), buffer, clonedObjects, aRv);
}
void
XMLHttpRequest::SendAsBinary(const nsAString& aBody, ErrorResult& aRv)
{
NS_NOTYETIMPLEMENTED("Implement me!");
aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
return;
}
void
XMLHttpRequest::Abort(ErrorResult& aRv)
{
mWorkerPrivate->AssertIsOnWorkerThread();
if (mCanceled) {
aRv.Throw(UNCATCHABLE_EXCEPTION);
}
if (!mProxy) {
return;
}
MaybeDispatchPrematureAbortEvents(aRv);
if (aRv.Failed()) {
return;
}
mProxy->mOuterEventStreamId++;
nsRefPtr<AbortRunnable> runnable = new AbortRunnable(mWorkerPrivate, mProxy);
if (!runnable->Dispatch(mWorkerPrivate->GetJSContext())) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
}
void
XMLHttpRequest::GetResponseHeader(const nsACString& aHeader,
nsACString& aResponseHeader, ErrorResult& aRv)
{
mWorkerPrivate->AssertIsOnWorkerThread();
if (mCanceled) {
aRv.Throw(UNCATCHABLE_EXCEPTION);
return;
}
if (!mProxy) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
nsCString responseHeader;
nsRefPtr<GetResponseHeaderRunnable> runnable =
new GetResponseHeaderRunnable(mWorkerPrivate, mProxy, aHeader,
responseHeader);
if (!runnable->Dispatch(mWorkerPrivate->GetJSContext())) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
aResponseHeader = responseHeader;
}
void
XMLHttpRequest::GetAllResponseHeaders(nsACString& aResponseHeaders,
ErrorResult& aRv)
{
mWorkerPrivate->AssertIsOnWorkerThread();
if (mCanceled) {
aRv.Throw(UNCATCHABLE_EXCEPTION);
return;
}
if (!mProxy) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
nsCString responseHeaders;
nsRefPtr<GetAllResponseHeadersRunnable> runnable =
new GetAllResponseHeadersRunnable(mWorkerPrivate, mProxy, responseHeaders);
if (!runnable->Dispatch(mWorkerPrivate->GetJSContext())) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
aResponseHeaders = responseHeaders;
}
void
XMLHttpRequest::OverrideMimeType(const nsAString& aMimeType, ErrorResult& aRv)
{
mWorkerPrivate->AssertIsOnWorkerThread();
if (mCanceled) {
aRv.Throw(UNCATCHABLE_EXCEPTION);
return;
}
// We're supposed to throw if the state is not OPENED or HEADERS_RECEIVED. We
// can detect OPENED really easily but we can't detect HEADERS_RECEIVED in a
// non-racy way until the XHR state machine actually runs on this thread
// (bug 671047). For now we're going to let this work only if the Send()
// method has not been called.
if (!mProxy || SendInProgress()) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
nsRefPtr<OverrideMimeTypeRunnable> runnable =
new OverrideMimeTypeRunnable(mWorkerPrivate, mProxy, aMimeType);
if (!runnable->Dispatch(mWorkerPrivate->GetJSContext())) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
}
void
XMLHttpRequest::SetResponseType(XMLHttpRequestResponseType aResponseType,
ErrorResult& aRv)
{
mWorkerPrivate->AssertIsOnWorkerThread();
if (mCanceled) {
aRv.Throw(UNCATCHABLE_EXCEPTION);
return;
}
if (!mProxy || SendInProgress()) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return;
}
// "document" is fine for the main thread but not for a worker. Short-circuit
// that here.
if (aResponseType == XMLHttpRequestResponseType::Document) {
return;
}
nsString responseType;
ConvertResponseTypeToString(aResponseType, responseType);
nsRefPtr<SetResponseTypeRunnable> runnable =
new SetResponseTypeRunnable(mWorkerPrivate, mProxy, responseType);
if (!runnable->Dispatch(mWorkerPrivate->GetJSContext())) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
nsString acceptedResponseTypeString;
runnable->GetResponseType(acceptedResponseTypeString);
mResponseType = ConvertStringToResponseType(acceptedResponseTypeString);
}
jsval
XMLHttpRequest::GetResponse(JSContext* /* unused */, ErrorResult& aRv)
{
if (NS_SUCCEEDED(mStateData.mResponseTextResult) &&
JSVAL_IS_VOID(mStateData.mResponse)) {
MOZ_ASSERT(mStateData.mResponseText.Length());
MOZ_ASSERT(NS_SUCCEEDED(mStateData.mResponseResult));
JSString* str =
JS_NewUCStringCopyN(mWorkerPrivate->GetJSContext(),
mStateData.mResponseText.get(),
mStateData.mResponseText.Length());
if (!str) {
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
return JSVAL_VOID;
}
mStateData.mResponse = STRING_TO_JSVAL(str);
}
aRv = mStateData.mResponseResult;
return mStateData.mResponse;
}
void
XMLHttpRequest::GetResponseText(nsAString& aResponseText, ErrorResult& aRv)
{
aRv = mStateData.mResponseTextResult;
aResponseText = mStateData.mResponseText;
}
void
XMLHttpRequest::UpdateState(const StateData& aStateData)
{
mStateData = aStateData;
if (JSVAL_IS_GCTHING(mStateData.mResponse)) {
mozilla::HoldJSObjects(this);
}
}
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