author Ehsan Akhgari <>
Wed, 22 Aug 2012 11:56:38 -0400
changeset 108991 a16372ce30b5f6b747246b01fcd215a4bf3b6342
parent 107500 a2d271ce54ffcd1cc5ec08fab56d86fb0062b76d
child 109691 41696b70b514b97941f82e2fd8e5b8ac95b0c642
child 110823 0a1f4d81635adf13c29c71aa80d4e44198125119
child 113574 c4f83d9d8243f3f853a5356188164a5fddee2b5a
permissions -rw-r--r--
Bug 579517 - Part 1: Automated conversion of NSPR numeric types to stdint types in Gecko; r=bsmedberg This patch was generated by a script. Here's the source of the script for future reference: function convert() { echo "Converting $1 to $2..." find . ! -wholename "*nsprpub*" \ ! -wholename "*security/nss*" \ ! -wholename "*/.hg*" \ ! -wholename "obj-ff-dbg*" \ ! -name nsXPCOMCID.h \ ! -name prtypes.h \ -type f \ \( -iname "*.cpp" \ -o -iname "*.h" \ -o -iname "*.c" \ -o -iname "*.cc" \ -o -iname "*.idl" \ -o -iname "*.ipdl" \ -o -iname "*.ipdlh" \ -o -iname "*.mm" \) | \ xargs -n 1 sed -i -e "s/\b$1\b/$2/g" } convert PRInt8 int8_t convert PRUint8 uint8_t convert PRInt16 int16_t convert PRUint16 uint16_t convert PRInt32 int32_t convert PRUint32 uint32_t convert PRInt64 int64_t convert PRUint64 uint64_t convert PRIntn int convert PRUintn unsigned convert PRSize size_t convert PROffset32 int32_t convert PROffset64 int64_t convert PRPtrdiff ptrdiff_t convert PRFloat64 double

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 */

#ifndef nsXMLHttpRequest_h__
#define nsXMLHttpRequest_h__

#include "nsIXMLHttpRequest.h"
#include "nsISupportsUtils.h"
#include "nsString.h"
#include "nsIURI.h"
#include "nsIHttpChannel.h"
#include "nsIDocument.h"
#include "nsIStreamListener.h"
#include "nsWeakReference.h"
#include "jsapi.h"
#include "nsIScriptContext.h"
#include "nsIChannelEventSink.h"
#include "nsIAsyncVerifyRedirectCallback.h"
#include "nsIInterfaceRequestor.h"
#include "nsIHttpHeaderVisitor.h"
#include "nsIProgressEventSink.h"
#include "nsCOMArray.h"
#include "nsJSUtils.h"
#include "nsTArray.h"
#include "nsIJSNativeInitializer.h"
#include "nsIDOMLSProgressEvent.h"
#include "nsITimer.h"
#include "nsDOMProgressEvent.h"
#include "nsDOMEventTargetHelper.h"
#include "nsContentUtils.h"
#include "nsDOMFile.h"
#include "nsDOMBlobBuilder.h"
#include "nsIPrincipal.h"
#include "nsIScriptObjectPrincipal.h"

#include "mozilla/Assertions.h"
#include "mozilla/dom/BindingUtils.h"
#include "mozilla/dom/TypedArray.h"
#include "mozilla/dom/XMLHttpRequestBinding.h"
#include "mozilla/dom/XMLHttpRequestUploadBinding.h"

class nsILoadGroup;
class AsyncVerifyRedirectCallbackForwarder;
class nsIUnicodeDecoder;
class nsIDOMFormData;

#define IMPL_EVENT_HANDLER(_lowercase, _capitalized)                    \
  JSObject* GetOn##_lowercase(JSContext* /* unused */ )                 \
  {                                                                     \
    return GetListenerAsJSObject(mOn##_capitalized##Listener);          \
  }                                                                     \
  void SetOn##_lowercase(JSContext* aCx, JSObject* aCallback, ErrorResult& aRv) \
  {                                                                     \
    aRv = SetJSObjectListener(aCx, NS_LITERAL_STRING(#_lowercase),      \
                              mOn##_capitalized##Listener,              \
                              aCallback);                               \

class nsXHREventTarget : public nsDOMEventTargetHelper,
                         public nsIXMLHttpRequestEventTarget
  typedef mozilla::dom::XMLHttpRequestResponseType

  virtual ~nsXHREventTarget() {}

  IMPL_EVENT_HANDLER(loadstart, LoadStart)
  IMPL_EVENT_HANDLER(progress, Progress)
  IMPL_EVENT_HANDLER(abort, Abort)
  IMPL_EVENT_HANDLER(error, Error)
  IMPL_EVENT_HANDLER(timeout, Timeout)
  IMPL_EVENT_HANDLER(loadend, Loadend)
  virtual void DisconnectFromOwner();
  static inline JSObject* GetListenerAsJSObject(nsDOMEventListenerWrapper* aWrapper)
    if (!aWrapper) {
      return nullptr;

    nsCOMPtr<nsIXPConnectJSObjectHolder> holder =
    JSObject* obj;
    return holder && NS_SUCCEEDED(holder->GetJSObject(&obj)) ? obj : nullptr;
  inline nsresult SetJSObjectListener(JSContext* aCx,
                                      const nsAString& aType,
                                      nsRefPtr<nsDOMEventListenerWrapper>& aWrapper,
                                      JSObject* aCallback)
    nsCOMPtr<nsIDOMEventListener> listener;
    if (aCallback) {
      nsresult rv =
      NS_ENSURE_SUCCESS(rv, rv);

    return RemoveAddEventListener(aType, aWrapper, listener);

  nsRefPtr<nsDOMEventListenerWrapper> mOnLoadListener;
  nsRefPtr<nsDOMEventListenerWrapper> mOnErrorListener;
  nsRefPtr<nsDOMEventListenerWrapper> mOnAbortListener;
  nsRefPtr<nsDOMEventListenerWrapper> mOnLoadStartListener;
  nsRefPtr<nsDOMEventListenerWrapper> mOnProgressListener;
  nsRefPtr<nsDOMEventListenerWrapper> mOnLoadendListener;
  nsRefPtr<nsDOMEventListenerWrapper> mOnTimeoutListener;

class nsXMLHttpRequestUpload : public nsXHREventTarget,
                               public nsIXMLHttpRequestUpload
  nsXMLHttpRequestUpload(nsDOMEventTargetHelper* aOwner)

  virtual JSObject* WrapObject(JSContext *cx, JSObject *scope,
                               bool *triedToWrap)
    return mozilla::dom::XMLHttpRequestUploadBinding::Wrap(cx, scope, this, triedToWrap);
  nsISupports* GetParentObject()
    return GetOwner();

  bool HasListeners()
    return mListenerManager && mListenerManager->HasListeners();

class nsXMLHttpRequest : public nsXHREventTarget,
                         public nsIXMLHttpRequest,
                         public nsIJSXMLHttpRequest,
                         public nsIStreamListener,
                         public nsIChannelEventSink,
                         public nsIProgressEventSink,
                         public nsIInterfaceRequestor,
                         public nsSupportsWeakReference,
                         public nsIJSNativeInitializer,
                         public nsITimerCallback
  friend class nsXHRParseEndListener;
  virtual ~nsXMLHttpRequest();

  virtual JSObject* WrapObject(JSContext *cx, JSObject *scope,
                               bool *triedToWrap)
    return mozilla::dom::XMLHttpRequestBinding::Wrap(cx, scope, this, triedToWrap);
  nsISupports* GetParentObject()
    return GetOwner();

  // The WebIDL constructor.
  static already_AddRefed<nsXMLHttpRequest>
  Constructor(JSContext* aCx,
              nsISupports* aGlobal,
              const mozilla::dom::MozXMLHttpRequestParameters& aParams,
              ErrorResult& aRv)
    nsCOMPtr<nsPIDOMWindow> window = do_QueryInterface(aGlobal);
    nsCOMPtr<nsIScriptObjectPrincipal> principal = do_QueryInterface(aGlobal);
    if (!window || ! principal) {
      return NULL;

    nsRefPtr<nsXMLHttpRequest> req = new nsXMLHttpRequest();
    req->Construct(principal->GetPrincipal(), window);
    req->InitParameters(aParams.mozAnon, aParams.mozSystem);
    return req.forget();

  void Construct(nsIPrincipal* aPrincipal,
                 nsPIDOMWindow* aOwnerWindow,
                 nsIURI* aBaseURI = NULL)
    MOZ_ASSERT_IF(aOwnerWindow, aOwnerWindow->IsInnerWindow());
    mPrincipal = aPrincipal;
    mBaseURI = aBaseURI;

  // Initialize XMLHttpRequestParameter object.
  nsresult InitParameters(JSContext* aCx, const jsval* aParams);
  void InitParameters(bool aAnon, bool aSystem);


  // nsIXMLHttpRequest


  // nsIStreamListener

  // nsIRequestObserver

  // nsIChannelEventSink

  // nsIProgressEventSink

  // nsIInterfaceRequestor

  // nsITimerCallback

  // nsIJSNativeInitializer
  NS_IMETHOD Initialize(nsISupports* aOwner, JSContext* cx, JSObject* obj,
                       uint32_t argc, jsval* argv);


#ifdef DEBUG
  void StaticAssertions();

  // event handler
  IMPL_EVENT_HANDLER(readystatechange, Readystatechange)

  // states
  uint16_t GetReadyState();

  // request
  void Open(const nsAString& aMethod, const nsAString& aUrl, bool aAsync,
            const mozilla::dom::Optional<nsAString>& aUser,
            const mozilla::dom::Optional<nsAString>& aPassword,
            ErrorResult& aRv)
    aRv = Open(NS_ConvertUTF16toUTF8(aMethod), NS_ConvertUTF16toUTF8(aUrl),
               aAsync, aUser, aPassword);
  void SetRequestHeader(const nsAString& aHeader, const nsAString& aValue,
                        ErrorResult& aRv)
    aRv = SetRequestHeader(NS_ConvertUTF16toUTF8(aHeader),
  uint32_t GetTimeout()
    return mTimeoutMilliseconds;
  void SetTimeout(uint32_t aTimeout, ErrorResult& aRv);
  bool GetWithCredentials();
  void SetWithCredentials(bool aWithCredentials, nsresult& aRv);
  nsXMLHttpRequestUpload* GetUpload();

  class RequestBody
    RequestBody() : mType(Uninitialized)
    RequestBody(mozilla::dom::ArrayBuffer* aArrayBuffer) : mType(ArrayBuffer)
      mValue.mArrayBuffer = aArrayBuffer;
    RequestBody(nsIDOMBlob* aBlob) : mType(Blob)
      mValue.mBlob = aBlob;
    RequestBody(nsIDocument* aDocument) : mType(Document)
      mValue.mDocument = aDocument;
    RequestBody(const nsAString& aString) : mType(DOMString)
      mValue.mString = &aString;
    RequestBody(nsIDOMFormData* aFormData) : mType(FormData)
      mValue.mFormData = aFormData;
    RequestBody(nsIInputStream* aStream) : mType(InputStream)
      mValue.mStream = aStream;

    enum Type {
    union Value {
      mozilla::dom::ArrayBuffer* mArrayBuffer;
      nsIDOMBlob* mBlob;
      nsIDocument* mDocument;
      const nsAString* mString;
      nsIDOMFormData* mFormData;
      nsIInputStream* mStream;

    Type GetType() const
      MOZ_ASSERT(mType != Uninitialized);
      return mType;
    Value GetValue() const
      MOZ_ASSERT(mType != Uninitialized);
      return mValue;

    Type mType;
    Value mValue;

  static nsresult GetRequestBody(nsIVariant* aVariant,
                                 const Nullable<RequestBody>& aBody,
                                 nsIInputStream** aResult,
                                 nsACString& aContentType,
                                 nsACString& aCharset);

  nsresult Send(nsIVariant* aVariant, const Nullable<RequestBody>& aBody);
  nsresult Send(const Nullable<RequestBody>& aBody)
    return Send(nullptr, aBody);
  nsresult Send(const RequestBody& aBody)
    return Send(Nullable<RequestBody>(aBody));

  void Send(ErrorResult& aRv)
    aRv = Send(Nullable<RequestBody>());
  void Send(mozilla::dom::ArrayBuffer& aArrayBuffer, ErrorResult& aRv)
    aRv = Send(RequestBody(&aArrayBuffer));
  void Send(nsIDOMBlob* aBlob, ErrorResult& aRv)
    NS_ASSERTION(aBlob, "Null should go to string version");
    aRv = Send(RequestBody(aBlob));
  void Send(nsIDocument* aDoc, ErrorResult& aRv)
    NS_ASSERTION(aDoc, "Null should go to string version");
    aRv = Send(RequestBody(aDoc));
  void Send(const nsAString& aString, ErrorResult& aRv)
    if (DOMStringIsNull(aString)) {
    else {
      aRv = Send(RequestBody(aString));
  void Send(nsIDOMFormData* aFormData, ErrorResult& aRv)
    NS_ASSERTION(aFormData, "Null should go to string version");
    aRv = Send(RequestBody(aFormData));
  void Send(nsIInputStream* aStream, ErrorResult& aRv)
    NS_ASSERTION(aStream, "Null should go to string version");
    aRv = Send(RequestBody(aStream));
  void SendAsBinary(const nsAString& aBody, ErrorResult& aRv);

  void Abort();

  // response
  uint32_t GetStatus();
  void GetStatusText(nsString& aStatusText);
  void GetResponseHeader(const nsACString& aHeader, nsACString& aResult,
                         ErrorResult& aRv);
  void GetResponseHeader(const nsAString& aHeader, nsString& aResult,
                         ErrorResult& aRv)
    nsCString result;
    GetResponseHeader(NS_ConvertUTF16toUTF8(aHeader), result, aRv);
    if (result.IsVoid()) {
    else {
      // We use UTF8ToNewUnicode here because it truncates after invalid UTF-8
      // characters, CopyUTF8toUTF16 just doesn't copy in that case.
      uint32_t length;
      PRUnichar* chars = UTF8ToNewUnicode(result, &length);
      aResult.Adopt(chars, length);
  void GetAllResponseHeaders(nsString& aResponseHeaders);
  void OverrideMimeType(const nsAString& aMimeType)
    // XXX Should we do some validation here?
    mOverrideMimeType = aMimeType;
  XMLHttpRequestResponseType GetResponseType()
    return XMLHttpRequestResponseType(mResponseType);
  void SetResponseType(XMLHttpRequestResponseType aType, ErrorResult& aRv);
  JS::Value GetResponse(JSContext* aCx, ErrorResult& aRv);
  void GetResponseText(nsString& aResponseText, ErrorResult& aRv);
  nsIDocument* GetResponseXML(ErrorResult& aRv);

  bool GetMozBackgroundRequest();
  void SetMozBackgroundRequest(bool aMozBackgroundRequest, nsresult& aRv);
  bool GetMultipart();
  void SetMultipart(bool aMultipart, nsresult& aRv);

  bool GetMozAnon();
  bool GetMozSystem();

  nsIChannel* GetChannel()
    return mChannel;

  // We need a GetInterface callable from JS for chrome JS
  JS::Value GetInterface(JSContext* aCx, nsIJSIID* aIID, ErrorResult& aRv);

  // This creates a trusted readystatechange event, which is not cancelable and
  // doesn't bubble.
  static nsresult CreateReadystatechangeEvent(nsIDOMEvent** aDOMEvent);
  // For backwards compatibility aPosition should contain the headers for upload
  // and aTotalSize is LL_MAXUINT when unknown. Both those values are
  // used by nsXMLHttpProgressEvent. Normal progress event should not use
  // headers in aLoaded and aTotal is 0 when unknown.
  void DispatchProgressEvent(nsDOMEventTargetHelper* aTarget,
                             const nsAString& aType,
                             // Whether to use nsXMLHttpProgressEvent,
                             // which implements LS Progress Event.
                             bool aUseLSEventWrapper,
                             bool aLengthComputable,
                             // For Progress Events
                             uint64_t aLoaded, uint64_t aTotal,
                             // For LS Progress Events
                             uint64_t aPosition, uint64_t aTotalSize);
  void DispatchProgressEvent(nsDOMEventTargetHelper* aTarget,
                             const nsAString& aType,
                             bool aLengthComputable,
                             uint64_t aLoaded, uint64_t aTotal)
    DispatchProgressEvent(aTarget, aType, false,
                          aLengthComputable, aLoaded, aTotal,
                          aLoaded, aLengthComputable ? aTotal : LL_MAXUINT);

  // Dispatch the "progress" event on the XHR or XHR.upload object if we've
  // received data since the last "progress" event. Also dispatches
  // "uploadprogress" as needed.
  void MaybeDispatchProgressEvents(bool aFinalProgress);

  // This is called by the factory constructor.
  nsresult Init();

  void SetRequestObserver(nsIRequestObserver* aObserver);

  bool AllowUploadProgress();
  void RootJSResultObjects();

  virtual void DisconnectFromOwner();
  friend class nsMultipartProxyListener;

  nsresult DetectCharset();
  nsresult AppendToResponseText(const char * aBuffer, uint32_t aBufferLen);
  static NS_METHOD StreamReaderFunc(nsIInputStream* in,
                void* closure,
                const char* fromRawSegment,
                uint32_t toOffset,
                uint32_t count,
                uint32_t *writeCount);
  nsresult CreateResponseParsedJSON(JSContext* aCx);
  nsresult CreatePartialBlob(void);
  bool CreateDOMFile(nsIRequest *request);
  // Change the state of the object with this. The broadcast argument
  // determines if the onreadystatechange listener should be called.
  nsresult ChangeState(uint32_t aState, bool aBroadcast = true);
  already_AddRefed<nsILoadGroup> GetLoadGroup() const;
  nsIURI *GetBaseURI();

  nsresult RemoveAddEventListener(const nsAString& aType,
                                  nsRefPtr<nsDOMEventListenerWrapper>& aCurrent,
                                  nsIDOMEventListener* aNew);

  nsresult GetInnerEventListener(nsRefPtr<nsDOMEventListenerWrapper>& aWrapper,
                                 nsIDOMEventListener** aListener);

  already_AddRefed<nsIHttpChannel> GetCurrentHttpChannel();

  bool IsSystemXHR();

  void ChangeStateToDone();

   * Check if aChannel is ok for a cross-site request by making sure no
   * inappropriate headers are set, and no username/password is set.
   * Also updates the XML_HTTP_REQUEST_USE_XSITE_AC bit.
  nsresult CheckChannelForCrossSiteRequest(nsIChannel* aChannel);

  void StartProgressEventTimer();

  friend class AsyncVerifyRedirectCallbackForwarder;
  void OnRedirectVerifyCallback(nsresult result);

  nsresult Open(const nsACString& method, const nsACString& url, bool async,
                const mozilla::dom::Optional<nsAString>& user,
                const mozilla::dom::Optional<nsAString>& password);

  nsCOMPtr<nsISupports> mContext;
  nsCOMPtr<nsIPrincipal> mPrincipal;
  nsCOMPtr<nsIChannel> mChannel;
  // mReadRequest is different from mChannel for multipart requests
  nsCOMPtr<nsIRequest> mReadRequest;
  nsCOMPtr<nsIDocument> mResponseXML;
  nsCOMPtr<nsIChannel> mCORSPreflightChannel;
  nsTArray<nsCString> mCORSUnsafeHeaders;

  nsRefPtr<nsDOMEventListenerWrapper> mOnReadystatechangeListener;

  nsCOMPtr<nsIStreamListener> mXMLParserStreamListener;

  // used to implement getAllResponseHeaders()
  class nsHeaderVisitor : public nsIHttpHeaderVisitor {
    nsHeaderVisitor() { }
    virtual ~nsHeaderVisitor() {}
    const nsACString &Headers() { return mHeaders; }
    nsCString mHeaders;

  // The bytes of our response body. Only used for DEFAULT, ARRAYBUFFER and
  // BLOB responseTypes
  nsCString mResponseBody;

  // The text version of our response body. This is incrementally decoded into
  // as we receive network data. However for the DEFAULT responseType we
  // lazily decode into this from mResponseBody only when .responseText is
  // accessed.
  // Only used for DEFAULT and TEXT responseTypes.
  nsString mResponseText;
  // For DEFAULT responseType we use this to keep track of how far we've
  // lazily decoded from mResponseBody to mResponseText
  uint32_t mResponseBodyDecodedPos;

  // Decoder used for decoding into mResponseText
  // Only used for DEFAULT, TEXT and JSON responseTypes.
  // In cases where we've only received half a surrogate, the decoder itself
  // carries the state to remember this. Next time we receive more data we
  // simply feed the new data into the decoder which will handle the second
  // part of the surrogate.
  nsCOMPtr<nsIUnicodeDecoder> mDecoder;

  nsCString mResponseCharset;

  enum ResponseType {

  void SetResponseType(nsXMLHttpRequest::ResponseType aType, ErrorResult& aRv);

  ResponseType mResponseType;

  // It is either a cached blob-response from the last call to GetResponse,
  // but is also explicitly set in OnStopRequest.
  nsCOMPtr<nsIDOMBlob> mResponseBlob;
  // Non-null only when we are able to get a os-file representation of the
  // response, i.e. when loading from a file, or when the http-stream
  // caches into a file or is reading from a cached file.
  nsRefPtr<nsDOMFile> mDOMFile;
  // We stream data to mBuilder when response type is "blob" or "moz-blob"
  // and mDOMFile is null.
  nsRefPtr<nsDOMBlobBuilder> mBuilder;

  nsString mOverrideMimeType;

   * The notification callbacks the channel had when Send() was
   * called.  We want to forward things here as needed.
  nsCOMPtr<nsIInterfaceRequestor> mNotificationCallbacks;
   * Sink interfaces that we implement that mNotificationCallbacks may
   * want to also be notified for.  These are inited lazily if we're
   * asked for the relevant interface.
  nsCOMPtr<nsIChannelEventSink> mChannelEventSink;
  nsCOMPtr<nsIProgressEventSink> mProgressEventSink;

  nsIRequestObserver* mRequestObserver;

  nsCOMPtr<nsIURI> mBaseURI;

  uint32_t mState;

  nsRefPtr<nsXMLHttpRequestUpload> mUpload;
  uint64_t mUploadTransferred;
  uint64_t mUploadTotal;
  bool mUploadLengthComputable;
  bool mUploadComplete;
  bool mProgressSinceLastProgressEvent;
  uint64_t mUploadProgress; // For legacy
  uint64_t mUploadProgressMax; // For legacy

  // Timeout support
  PRTime mRequestSentTime;
  uint32_t mTimeoutMilliseconds;
  nsCOMPtr<nsITimer> mTimeoutTimer;
  void StartTimeoutTimer();
  void HandleTimeoutCallback();

  bool mErrorLoad;
  bool mWaitingForOnStopRequest;
  bool mProgressTimerIsActive;
  bool mProgressEventWasDelayed;
  bool mIsHtml;
  bool mWarnAboutMultipartHtml;
  bool mWarnAboutSyncHtml;
  bool mLoadLengthComputable;
  uint64_t mLoadTotal; // 0 if not known.
  uint64_t mLoadTransferred;
  nsCOMPtr<nsITimer> mProgressNotifier;
  void HandleProgressTimerCallback();

  bool mIsSystem;
  bool mIsAnon;

   * Close the XMLHttpRequest's channels and dispatch appropriate progress
   * events.
   * @param aType The progress event type.
   * @param aFlag A XML_HTTP_REQUEST_* state flag defined in
   *              nsXMLHttpRequest.cpp.
  void CloseRequestWithError(const nsAString& aType, const uint32_t aFlag);

  bool mFirstStartRequestSeen;
  bool mInLoadProgressEvent;
  nsCOMPtr<nsIAsyncVerifyRedirectCallback> mRedirectCallback;
  nsCOMPtr<nsIChannel> mNewRedirectChannel;
  jsval mResultJSON;
  JSObject* mResultArrayBuffer;

  void ResetResponse();

  struct RequestHeader
    nsCString header;
    nsCString value;
  nsTArray<RequestHeader> mModifiedRequestHeaders;


// helper class to expose a progress DOM Event

class nsXMLHttpProgressEvent : public nsIDOMProgressEvent,
                               public nsIDOMLSProgressEvent
  nsXMLHttpProgressEvent(nsIDOMProgressEvent* aInner,
                         uint64_t aCurrentProgress,
                         uint64_t aMaxProgress,
                         nsPIDOMWindow* aWindow);
  virtual ~nsXMLHttpProgressEvent();


  void WarnAboutLSProgressEvent(nsIDocument::DeprecatedOperations);

  // Use nsDOMProgressEvent so that we can forward
  // most of the method calls easily.
  nsRefPtr<nsDOMProgressEvent> mInner;
  nsCOMPtr<nsPIDOMWindow> mWindow;
  uint64_t mCurProgress;
  uint64_t mMaxProgress;

class nsXHRParseEndListener : public nsIDOMEventListener
  NS_IMETHOD HandleEvent(nsIDOMEvent *event)
    nsCOMPtr<nsIXMLHttpRequest> xhr = do_QueryReferent(mXHR);
    if (xhr) {
    mXHR = nullptr;
    return NS_OK;
  nsXHRParseEndListener(nsIXMLHttpRequest* aXHR)
    : mXHR(do_GetWeakReference(aXHR)) {}
  virtual ~nsXHRParseEndListener() {}
  nsWeakPtr mXHR;