Add m-esr52 at 52.6.0

1 files changed, 872 insertions, 0 deletions

diff --git a/dom/xhr/XMLHttpRequestMainThread.h b/dom/xhr/XMLHttpRequestMainThread.h
new file mode 100644
index 000000000..c9bcddf99
--- /dev/null
+++ b/dom/xhr/XMLHttpRequestMainThread.h
@@ -0,0 +1,872 @@
+/* -*- 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/. */
+
+#ifndef mozilla_dom_XMLHttpRequestMainThread_h
+#define mozilla_dom_XMLHttpRequestMainThread_h
+
+#include <bitset>
+#include "nsAutoPtr.h"
+#include "nsIXMLHttpRequest.h"
+#include "nsISupportsUtils.h"
+#include "nsIURI.h"
+#include "nsIHttpChannel.h"
+#include "nsIDocument.h"
+#include "nsIStreamListener.h"
+#include "nsWeakReference.h"
+#include "nsIChannelEventSink.h"
+#include "nsIAsyncVerifyRedirectCallback.h"
+#include "nsIInterfaceRequestor.h"
+#include "nsIHttpHeaderVisitor.h"
+#include "nsIProgressEventSink.h"
+#include "nsJSUtils.h"
+#include "nsTArray.h"
+#include "nsITimer.h"
+#include "nsIPrincipal.h"
+#include "nsIScriptObjectPrincipal.h"
+#include "nsISizeOfEventTarget.h"
+#include "nsIXPConnect.h"
+#include "nsIInputStream.h"
+#include "mozilla/Assertions.h"
+#include "mozilla/Attributes.h"
+#include "mozilla/DOMEventTargetHelper.h"
+#include "mozilla/MemoryReporting.h"
+#include "mozilla/NotNull.h"
+#include "mozilla/dom/MutableBlobStorage.h"
+#include "mozilla/dom/TypedArray.h"
+#include "mozilla/dom/XMLHttpRequest.h"
+#include "mozilla/dom/XMLHttpRequestBinding.h"
+#include "mozilla/dom/XMLHttpRequestEventTarget.h"
+#include "mozilla/dom/XMLHttpRequestString.h"
+
+#ifdef Status
+/* Xlib headers insist on this for some reason... Nuke it because
+   it'll override our member name */
+#undef Status
+#endif
+
+class nsIJARChannel;
+class nsILoadGroup;
+class nsIUnicodeDecoder;
+class nsIJSID;
+
+namespace mozilla {
+namespace dom {
+
+class Blob;
+class BlobSet;
+class DOMString;
+class FormData;
+class URLSearchParams;
+class XMLHttpRequestUpload;
+struct OriginAttributesDictionary;
+
+// A helper for building up an ArrayBuffer object's data
+// before creating the ArrayBuffer itself.  Will do doubling
+// based reallocation, up to an optional maximum growth given.
+//
+// When all the data has been appended, call getArrayBuffer,
+// passing in the JSContext* for which the ArrayBuffer object
+// is to be created.  This also implicitly resets the builder,
+// or it can be reset explicitly at any point by calling reset().
+class ArrayBufferBuilder
+{
+  uint8_t* mDataPtr;
+  uint32_t mCapacity;
+  uint32_t mLength;
+  void* mMapPtr;
+public:
+  ArrayBufferBuilder();
+  ~ArrayBufferBuilder();
+
+  void reset();
+
+  // Will truncate if aNewCap is < length().
+  bool setCapacity(uint32_t aNewCap);
+
+  // Append aDataLen bytes from data to the current buffer.  If we
+  // need to grow the buffer, grow by doubling the size up to a
+  // maximum of aMaxGrowth (if given).  If aDataLen is greater than
+  // what the new capacity would end up as, then grow by aDataLen.
+  //
+  // The data parameter must not overlap with anything beyond the
+  // builder's current valid contents [0..length)
+  bool append(const uint8_t* aNewData, uint32_t aDataLen,
+              uint32_t aMaxGrowth = 0);
+
+  uint32_t length()   { return mLength; }
+  uint32_t capacity() { return mCapacity; }
+
+  JSObject* getArrayBuffer(JSContext* aCx);
+
+  // Memory mapping to starting position of file(aFile) in the zip
+  // package(aJarFile).
+  //
+  // The file in the zip package has to be uncompressed and the starting
+  // position of the file must be aligned according to array buffer settings
+  // in JS engine.
+  nsresult mapToFileInPackage(const nsCString& aFile, nsIFile* aJarFile);
+
+protected:
+  static bool areOverlappingRegions(const uint8_t* aStart1, uint32_t aLength1,
+                                    const uint8_t* aStart2, uint32_t aLength2);
+};
+
+class nsXMLHttpRequestXPCOMifier;
+
+class RequestHeaders
+{
+  struct RequestHeader
+  {
+    nsCString mName;
+    nsCString mValue;
+  };
+  nsTArray<RequestHeader> mHeaders;
+  RequestHeader* Find(const nsACString& aName);
+
+public:
+  class CharsetIterator
+  {
+    bool mValid;
+    int32_t mCurPos, mCurLen, mCutoff;
+    nsACString& mSource;
+
+  public:
+    explicit CharsetIterator(nsACString& aSource);
+    bool Equals(const nsACString& aOther, const nsCStringComparator& aCmp) const;
+    void Replace(const nsACString& aReplacement);
+    bool Next();
+  };
+
+  bool Has(const char* aName);
+  bool Has(const nsACString& aName);
+  void Get(const char* aName, nsACString& aValue);
+  void Get(const nsACString& aName, nsACString& aValue);
+  void Set(const char* aName, const nsACString& aValue);
+  void Set(const nsACString& aName, const nsACString& aValue);
+  void MergeOrSet(const char* aName, const nsACString& aValue);
+  void MergeOrSet(const nsACString& aName, const nsACString& aValue);
+  void Clear();
+  void ApplyToChannel(nsIHttpChannel* aChannel) const;
+  void GetCORSUnsafeHeaders(nsTArray<nsCString>& aArray) const;
+};
+
+// Make sure that any non-DOM interfaces added here are also added to
+// nsXMLHttpRequestXPCOMifier.
+class XMLHttpRequestMainThread final : public XMLHttpRequest,
+                                       public nsIXMLHttpRequest,
+                                       public nsIJSXMLHttpRequest,
+                                       public nsIStreamListener,
+                                       public nsIChannelEventSink,
+                                       public nsIProgressEventSink,
+                                       public nsIInterfaceRequestor,
+                                       public nsSupportsWeakReference,
+                                       public nsITimerCallback,
+                                       public nsISizeOfEventTarget,
+                                       public MutableBlobStorageCallback
+{
+  friend class nsXHRParseEndListener;
+  friend class nsXMLHttpRequestXPCOMifier;
+
+public:
+  enum class ProgressEventType : uint8_t {
+    loadstart,
+    progress,
+    error,
+    abort,
+    timeout,
+    load,
+    loadend,
+    ENUM_MAX
+  };
+
+  XMLHttpRequestMainThread();
+
+  void Construct(nsIPrincipal* aPrincipal,
+                 nsIGlobalObject* aGlobalObject,
+                 nsIURI* aBaseURI = nullptr,
+                 nsILoadGroup* aLoadGroup = nullptr)
+  {
+    MOZ_ASSERT(aPrincipal);
+    MOZ_ASSERT_IF(nsCOMPtr<nsPIDOMWindowInner> win = do_QueryInterface(
+      aGlobalObject), win->IsInnerWindow());
+    mPrincipal = aPrincipal;
+    BindToOwner(aGlobalObject);
+    mBaseURI = aBaseURI;
+    mLoadGroup = aLoadGroup;
+  }
+
+  void InitParameters(bool aAnon, bool aSystem);
+
+  void SetParameters(bool aAnon, bool aSystem)
+  {
+    mIsAnon = aAnon || aSystem;
+    mIsSystem = aSystem;
+  }
+
+  NS_DECL_ISUPPORTS_INHERITED
+
+  // nsIXMLHttpRequest
+  NS_DECL_NSIXMLHTTPREQUEST
+
+  NS_FORWARD_NSIXMLHTTPREQUESTEVENTTARGET(XMLHttpRequestEventTarget::)
+
+  // nsIStreamListener
+  NS_DECL_NSISTREAMLISTENER
+
+  // nsIRequestObserver
+  NS_DECL_NSIREQUESTOBSERVER
+
+  // nsIChannelEventSink
+  NS_DECL_NSICHANNELEVENTSINK
+
+  // nsIProgressEventSink
+  NS_DECL_NSIPROGRESSEVENTSINK
+
+  // nsIInterfaceRequestor
+  NS_DECL_NSIINTERFACEREQUESTOR
+
+  // nsITimerCallback
+  NS_DECL_NSITIMERCALLBACK
+
+  // nsISizeOfEventTarget
+  virtual size_t
+    SizeOfEventTargetIncludingThis(MallocSizeOf aMallocSizeOf) const override;
+
+  NS_REALLY_FORWARD_NSIDOMEVENTTARGET(XMLHttpRequestEventTarget)
+
+  // states
+  virtual uint16_t ReadyState() const override;
+
+  // request
+  nsresult CreateChannel();
+  nsresult InitiateFetch(nsIInputStream* aUploadStream,
+                         int64_t aUploadLength,
+                         nsACString& aUploadContentType);
+
+  virtual void
+  Open(const nsACString& aMethod, const nsAString& aUrl,
+       ErrorResult& aRv) override;
+
+  virtual void
+  Open(const nsACString& aMethod, const nsAString& aUrl, bool aAsync,
+       const nsAString& aUsername, const nsAString& aPassword,
+       ErrorResult& aRv) override;
+
+  nsresult
+  Open(const nsACString& aMethod,
+       const nsACString& aUrl,
+       bool aAsync,
+       const nsAString& aUsername,
+       const nsAString& aPassword);
+
+  virtual void
+  SetRequestHeader(const nsACString& aName, const nsACString& aValue,
+                   ErrorResult& aRv) override
+  {
+    aRv = SetRequestHeader(aName, aValue);
+  }
+
+  virtual uint32_t
+  Timeout() const override
+  {
+    return mTimeoutMilliseconds;
+  }
+
+  virtual void
+  SetTimeout(uint32_t aTimeout, ErrorResult& aRv) override;
+
+  virtual bool WithCredentials() const override;
+
+  virtual void
+  SetWithCredentials(bool aWithCredentials, ErrorResult& aRv) override;
+
+  virtual XMLHttpRequestUpload*
+  GetUpload(ErrorResult& aRv) override;
+
+private:
+  virtual ~XMLHttpRequestMainThread();
+
+  class RequestBodyBase
+  {
+  public:
+    virtual nsresult GetAsStream(nsIInputStream** aResult,
+                                 uint64_t* aContentLength,
+                                 nsACString& aContentType,
+                                 nsACString& aCharset) const
+    {
+      NS_ASSERTION(false, "RequestBodyBase should not be used directly.");
+      return NS_ERROR_FAILURE;
+    }
+  };
+
+  template<typename Type>
+  class RequestBody final : public RequestBodyBase
+  {
+    Type* mBody;
+  public:
+    explicit RequestBody(Type* aBody) : mBody(aBody)
+    {
+    }
+    nsresult GetAsStream(nsIInputStream** aResult,
+                         uint64_t* aContentLength,
+                         nsACString& aContentType,
+                         nsACString& aCharset) const override;
+  };
+
+  nsresult SendInternal(const RequestBodyBase* aBody);
+
+  bool IsCrossSiteCORSRequest() const;
+  bool IsDeniedCrossSiteCORSRequest();
+
+  // Tell our channel what network interface ID we were told to use.
+  // If it's an HTTP channel and we were told to use a non-default
+  // interface ID.
+  void PopulateNetworkInterfaceId();
+
+public:
+  virtual void
+  Send(JSContext* /*aCx*/, ErrorResult& aRv) override
+  {
+    aRv = SendInternal(nullptr);
+  }
+
+  virtual void
+  Send(JSContext* /*aCx*/, const ArrayBuffer& aArrayBuffer,
+       ErrorResult& aRv) override
+  {
+    RequestBody<const ArrayBuffer> body(&aArrayBuffer);
+    aRv = SendInternal(&body);
+  }
+
+  virtual void
+  Send(JSContext* /*aCx*/, const ArrayBufferView& aArrayBufferView,
+       ErrorResult& aRv) override
+  {
+    RequestBody<const ArrayBufferView> body(&aArrayBufferView);
+    aRv = SendInternal(&body);
+  }
+
+  virtual void
+  Send(JSContext* /*aCx*/, Blob& aBlob, ErrorResult& aRv) override
+  {
+    RequestBody<Blob> body(&aBlob);
+    aRv = SendInternal(&body);
+  }
+
+  virtual void Send(JSContext* /*aCx*/, URLSearchParams& aURLSearchParams,
+                    ErrorResult& aRv) override
+  {
+    RequestBody<URLSearchParams> body(&aURLSearchParams);
+    aRv = SendInternal(&body);
+  }
+
+  virtual void
+  Send(JSContext* /*aCx*/, nsIDocument& aDoc, ErrorResult& aRv) override
+  {
+    RequestBody<nsIDocument> body(&aDoc);
+    aRv = SendInternal(&body);
+  }
+
+  virtual void
+  Send(JSContext* aCx, const nsAString& aString, ErrorResult& aRv) override
+  {
+    if (DOMStringIsNull(aString)) {
+      Send(aCx, aRv);
+    } else {
+      RequestBody<const nsAString> body(&aString);
+      aRv = SendInternal(&body);
+    }
+  }
+
+  virtual void
+  Send(JSContext* /*aCx*/, FormData& aFormData, ErrorResult& aRv) override
+  {
+    RequestBody<FormData> body(&aFormData);
+    aRv = SendInternal(&body);
+  }
+
+  virtual void
+  Send(JSContext* aCx, nsIInputStream* aStream, ErrorResult& aRv) override
+  {
+    NS_ASSERTION(aStream, "Null should go to string version");
+    RequestBody<nsIInputStream> body(aStream);
+    aRv = SendInternal(&body);
+  }
+
+  void
+  Abort() {
+    ErrorResult rv;
+    Abort(rv);
+    MOZ_ASSERT(!rv.Failed());
+  }
+
+  virtual void
+  Abort(ErrorResult& aRv) override;
+
+  // response
+  virtual void
+  GetResponseURL(nsAString& aUrl) override;
+
+  virtual uint32_t
+  GetStatus(ErrorResult& aRv) override;
+
+  virtual void
+  GetStatusText(nsACString& aStatusText, ErrorResult& aRv) override;
+
+  virtual void
+  GetResponseHeader(const nsACString& aHeader, nsACString& aResult,
+                    ErrorResult& aRv) override;
+
+  void
+  GetResponseHeader(const nsAString& aHeader, nsAString& aResult,
+                    ErrorResult& aRv)
+  {
+    nsAutoCString result;
+    GetResponseHeader(NS_ConvertUTF16toUTF8(aHeader), result, aRv);
+    if (result.IsVoid()) {
+      aResult.SetIsVoid(true);
+    }
+    else {
+      // The result value should be inflated:
+      CopyASCIItoUTF16(result, aResult);
+    }
+  }
+
+  virtual void
+  GetAllResponseHeaders(nsACString& aResponseHeaders,
+                        ErrorResult& aRv) override;
+
+  bool IsSafeHeader(const nsACString& aHeaderName,
+                    NotNull<nsIHttpChannel*> aHttpChannel) const;
+
+  virtual void
+  OverrideMimeType(const nsAString& aMimeType, ErrorResult& aRv) override;
+
+  virtual XMLHttpRequestResponseType
+  ResponseType() const override
+  {
+    return XMLHttpRequestResponseType(mResponseType);
+  }
+
+  virtual void
+  SetResponseType(XMLHttpRequestResponseType aType,
+                  ErrorResult& aRv) override;
+
+  virtual void
+  GetResponse(JSContext* aCx, JS::MutableHandle<JS::Value> aResponse,
+              ErrorResult& aRv) override;
+
+  virtual void
+  GetResponseText(DOMString& aResponseText, ErrorResult& aRv) override;
+
+  void
+  GetResponseText(XMLHttpRequestStringSnapshot& aSnapshot,
+                  ErrorResult& aRv);
+
+  virtual nsIDocument*
+  GetResponseXML(ErrorResult& aRv) override;
+
+  virtual bool
+  MozBackgroundRequest() const override;
+
+  virtual void
+  SetMozBackgroundRequest(bool aMozBackgroundRequest, ErrorResult& aRv) override;
+
+  virtual bool
+  MozAnon() const override;
+
+  virtual bool
+  MozSystem() const override;
+
+  virtual nsIChannel*
+  GetChannel() const override
+  {
+    return mChannel;
+  }
+
+  virtual void
+  GetNetworkInterfaceId(nsACString& aId) const override
+  {
+    aId = mNetworkInterfaceId;
+  }
+
+  virtual void
+  SetNetworkInterfaceId(const nsACString& aId) override
+  {
+    mNetworkInterfaceId = aId;
+  }
+
+  // We need a GetInterface callable from JS for chrome JS
+  virtual void
+  GetInterface(JSContext* aCx, nsIJSID* aIID,
+               JS::MutableHandle<JS::Value> aRetval,
+               ErrorResult& aRv) override;
+
+  // This fires a trusted readystatechange event, which is not cancelable and
+  // doesn't bubble.
+  nsresult FireReadystatechangeEvent();
+  void DispatchProgressEvent(DOMEventTargetHelper* aTarget,
+                             const ProgressEventType aType,
+                             int64_t aLoaded, int64_t aTotal);
+
+  // This is called by the factory constructor.
+  nsresult Init();
+
+  nsresult init(nsIPrincipal* principal,
+                nsPIDOMWindowInner* globalObject,
+                nsIURI* baseURI);
+
+  void SetRequestObserver(nsIRequestObserver* aObserver);
+
+  NS_DECL_CYCLE_COLLECTION_SKIPPABLE_SCRIPT_HOLDER_CLASS_INHERITED(XMLHttpRequestMainThread,
+                                                                   XMLHttpRequest)
+  bool AllowUploadProgress();
+
+  virtual void DisconnectFromOwner() override;
+
+  static void SetDontWarnAboutSyncXHR(bool aVal)
+  {
+    sDontWarnAboutSyncXHR = aVal;
+  }
+  static bool DontWarnAboutSyncXHR()
+  {
+    return sDontWarnAboutSyncXHR;
+  }
+
+  virtual void
+  SetOriginAttributes(const mozilla::dom::OriginAttributesDictionary& aAttrs) override;
+
+  void BlobStoreCompleted(MutableBlobStorage* aBlobStorage,
+                          Blob* aBlob,
+                          nsresult aResult) override;
+
+protected:
+  // XHR states are meant to mirror the XHR2 spec:
+  //   https://xhr.spec.whatwg.org/#states
+  enum class State : uint8_t {
+    unsent,           // object has been constructed.
+    opened,           // open() has been successfully invoked.
+    headers_received, // redirects followed and response headers received.
+    loading,          // response body is being received.
+    done,             // data transfer concluded, whether success or error.
+  };
+
+  nsresult DetectCharset();
+  nsresult AppendToResponseText(const char * aBuffer, uint32_t aBufferLen);
+  static nsresult StreamReaderFunc(nsIInputStream* in,
+                                   void* closure,
+                                   const char* fromRawSegment,
+                                   uint32_t toOffset,
+                                   uint32_t count,
+                                   uint32_t *writeCount);
+  nsresult CreateResponseParsedJSON(JSContext* aCx);
+  void CreatePartialBlob(ErrorResult& aRv);
+  bool CreateDOMBlob(nsIRequest *request);
+  // Change the state of the object with this. The broadcast argument
+  // determines if the onreadystatechange listener should be called.
+  nsresult ChangeState(State aState, bool aBroadcast = true);
+  already_AddRefed<nsILoadGroup> GetLoadGroup() const;
+  nsIURI *GetBaseURI();
+
+  already_AddRefed<nsIHttpChannel> GetCurrentHttpChannel();
+  already_AddRefed<nsIJARChannel> GetCurrentJARChannel();
+
+  void TruncateResponseText();
+
+  bool IsSystemXHR() const;
+  bool InUploadPhase() const;
+
+  void OnBodyParseEnd();
+  void ChangeStateToDone();
+
+  void StartProgressEventTimer();
+  void StopProgressEventTimer();
+
+  void MaybeCreateBlobStorage();
+
+  nsresult OnRedirectVerifyCallback(nsresult result);
+
+  already_AddRefed<nsXMLHttpRequestXPCOMifier> EnsureXPCOMifier();
+
+  nsCOMPtr<nsISupports> mContext;
+  nsCOMPtr<nsIPrincipal> mPrincipal;
+  nsCOMPtr<nsIChannel> mChannel;
+  nsCString mRequestMethod;
+  nsCOMPtr<nsIURI> mRequestURL;
+  nsCOMPtr<nsIDocument> mResponseXML;
+
+  nsCOMPtr<nsIStreamListener> mXMLParserStreamListener;
+
+  // used to implement getAllResponseHeaders()
+  class nsHeaderVisitor : public nsIHttpHeaderVisitor
+  {
+  public:
+    NS_DECL_ISUPPORTS
+    NS_DECL_NSIHTTPHEADERVISITOR
+    nsHeaderVisitor(const XMLHttpRequestMainThread& aXMLHttpRequest,
+                    NotNull<nsIHttpChannel*> aHttpChannel)
+      : mXHR(aXMLHttpRequest), mHttpChannel(aHttpChannel) {}
+    const nsACString &Headers() { return mHeaders; }
+  private:
+    virtual ~nsHeaderVisitor() {}
+
+    nsCString mHeaders;
+    const XMLHttpRequestMainThread& mXHR;
+    NotNull<nsCOMPtr<nsIHttpChannel>> mHttpChannel;
+  };
+
+  // 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.
+  XMLHttpRequestString 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;
+
+  void MatchCharsetAndDecoderToResponseDocument();
+
+  XMLHttpRequestResponseType mResponseType;
+
+  // It is either a cached blob-response from the last call to GetResponse,
+  // but is also explicitly set in OnStopRequest.
+  RefPtr<Blob> mResponseBlob;
+  // Non-null only when we are able to get a os-file representation of the
+  // response, i.e. when loading from a file.
+  RefPtr<Blob> mDOMBlob;
+  // We stream data to mBlobStorage when response type is "blob" and mDOMBlob is
+  // null.
+  RefPtr<MutableBlobStorage> mBlobStorage;
+  // We stream data to mBlobStorage when response type is "moz-blob" and
+  // mDOMBlob is null.
+  nsAutoPtr<BlobSet> mBlobSet;
+
+  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;
+  nsCOMPtr<nsILoadGroup> mLoadGroup;
+
+  State mState;
+
+  bool mFlagSynchronous;
+  bool mFlagAborted;
+  bool mFlagParseBody;
+  bool mFlagSyncLooping;
+  bool mFlagBackgroundRequest;
+  bool mFlagHadUploadListenersOnSend;
+  bool mFlagACwithCredentials;
+  bool mFlagTimedOut;
+  bool mFlagDeleted;
+
+  // The XHR2 spec's send() flag. Set when the XHR begins uploading, until it
+  // finishes downloading (or an error/abort has occurred during either phase).
+  // Used to guard against the user trying to alter headers/etc when it's too
+  // late, and ensure the XHR only handles one in-flight request at once.
+  bool mFlagSend;
+
+  RefPtr<XMLHttpRequestUpload> mUpload;
+  int64_t mUploadTransferred;
+  int64_t mUploadTotal;
+  bool mUploadComplete;
+  bool mProgressSinceLastProgressEvent;
+
+  // Timeout support
+  PRTime mRequestSentTime;
+  uint32_t mTimeoutMilliseconds;
+  nsCOMPtr<nsITimer> mTimeoutTimer;
+  void StartTimeoutTimer();
+  void HandleTimeoutCallback();
+
+  nsCOMPtr<nsITimer> mSyncTimeoutTimer;
+
+  enum SyncTimeoutType {
+    eErrorOrExpired,
+    eTimerStarted,
+    eNoTimerNeeded
+  };
+
+  SyncTimeoutType MaybeStartSyncTimeoutTimer();
+  void HandleSyncTimeoutTimer();
+  void CancelSyncTimeoutTimer();
+
+  bool mErrorLoad;
+  bool mErrorParsingXML;
+  bool mWaitingForOnStopRequest;
+  bool mProgressTimerIsActive;
+  bool mIsHtml;
+  bool mWarnAboutMultipartHtml;
+  bool mWarnAboutSyncHtml;
+  int64_t mLoadTotal; // -1 if not known.
+  // Amount of script-exposed (i.e. after undoing gzip compresion) data
+  // received.
+  uint64_t mDataAvailable;
+  // Number of HTTP message body bytes received so far. This quantity is
+  // in the same units as Content-Length and mLoadTotal, and hence counts
+  // compressed bytes when the channel has gzip Content-Encoding. If the
+  // channel does not have Content-Encoding, this will be the same as
+  // mDataReceived except between the OnProgress that changes mLoadTransferred
+  // and the corresponding OnDataAvailable (which changes mDataReceived).
+  // Ordering of OnProgress and OnDataAvailable is undefined.
+  int64_t mLoadTransferred;
+  nsCOMPtr<nsITimer> mProgressNotifier;
+  void HandleProgressTimerCallback();
+
+  bool mIsSystem;
+  bool mIsAnon;
+
+  // A platform-specific identifer to represent the network interface
+  // that this request is associated with.
+  nsCString mNetworkInterfaceId;
+
+  /**
+   * Close the XMLHttpRequest's channels.
+   */
+  void CloseRequest();
+
+  /**
+   * Close the XMLHttpRequest's channels and dispatch appropriate progress
+   * events.
+   *
+   * @param aType The progress event type.
+   */
+  void CloseRequestWithError(const ProgressEventType aType);
+
+  bool mFirstStartRequestSeen;
+  bool mInLoadProgressEvent;
+
+  nsCOMPtr<nsIAsyncVerifyRedirectCallback> mRedirectCallback;
+  nsCOMPtr<nsIChannel> mNewRedirectChannel;
+
+  JS::Heap<JS::Value> mResultJSON;
+
+  ArrayBufferBuilder mArrayBufferBuilder;
+  JS::Heap<JSObject*> mResultArrayBuffer;
+  bool mIsMappedArrayBuffer;
+
+  void ResetResponse();
+
+  bool ShouldBlockAuthPrompt();
+
+  RequestHeaders mAuthorRequestHeaders;
+
+  // Helper object to manage our XPCOM scriptability bits
+  nsXMLHttpRequestXPCOMifier* mXPCOMifier;
+
+  static bool sDontWarnAboutSyncXHR;
+};
+
+class MOZ_STACK_CLASS AutoDontWarnAboutSyncXHR
+{
+public:
+  AutoDontWarnAboutSyncXHR() : mOldVal(XMLHttpRequestMainThread::DontWarnAboutSyncXHR())
+  {
+    XMLHttpRequestMainThread::SetDontWarnAboutSyncXHR(true);
+  }
+
+  ~AutoDontWarnAboutSyncXHR()
+  {
+    XMLHttpRequestMainThread::SetDontWarnAboutSyncXHR(mOldVal);
+  }
+
+private:
+  bool mOldVal;
+};
+
+// A shim class designed to expose the non-DOM interfaces of
+// XMLHttpRequest via XPCOM stuff.
+class nsXMLHttpRequestXPCOMifier final : public nsIStreamListener,
+                                         public nsIChannelEventSink,
+                                         public nsIAsyncVerifyRedirectCallback,
+                                         public nsIProgressEventSink,
+                                         public nsIInterfaceRequestor,
+                                         public nsITimerCallback
+{
+  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+  NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(nsXMLHttpRequestXPCOMifier,
+                                           nsIStreamListener)
+
+  explicit nsXMLHttpRequestXPCOMifier(XMLHttpRequestMainThread* aXHR) :
+    mXHR(aXHR)
+  {
+  }
+
+private:
+  ~nsXMLHttpRequestXPCOMifier() {
+    if (mXHR) {
+      mXHR->mXPCOMifier = nullptr;
+    }
+  }
+
+public:
+  NS_FORWARD_NSISTREAMLISTENER(mXHR->)
+  NS_FORWARD_NSIREQUESTOBSERVER(mXHR->)
+  NS_FORWARD_NSICHANNELEVENTSINK(mXHR->)
+  NS_FORWARD_NSIASYNCVERIFYREDIRECTCALLBACK(mXHR->)
+  NS_FORWARD_NSIPROGRESSEVENTSINK(mXHR->)
+  NS_FORWARD_NSITIMERCALLBACK(mXHR->)
+
+  NS_DECL_NSIINTERFACEREQUESTOR
+
+private:
+  RefPtr<XMLHttpRequestMainThread> mXHR;
+};
+
+class nsXHRParseEndListener : public nsIDOMEventListener
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_IMETHOD HandleEvent(nsIDOMEvent *event) override
+  {
+    nsCOMPtr<nsIXMLHttpRequest> xhr = do_QueryReferent(mXHR);
+    if (xhr) {
+      static_cast<XMLHttpRequestMainThread*>(xhr.get())->OnBodyParseEnd();
+    }
+    mXHR = nullptr;
+    return NS_OK;
+  }
+  explicit nsXHRParseEndListener(nsIXMLHttpRequest* aXHR)
+    : mXHR(do_GetWeakReference(aXHR)) {}
+private:
+  virtual ~nsXHRParseEndListener() {}
+
+  nsWeakPtr mXHR;
+};
+
+} // dom namespace
+} // mozilla namespace
+
+#endif // mozilla_dom_XMLHttpRequestMainThread_h