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31 #ifndef MainThreadWebSocketChannel_h
32 #define MainThreadWebSocketChannel_h
34 #include "core/fileapi/FileError.h"
35 #include "core/fileapi/FileReaderLoaderClient.h"
36 #include "core/frame/ConsoleTypes.h"
37 #include "modules/websockets/WebSocketChannel.h"
38 #include "modules/websockets/WebSocketDeflateFramer.h"
39 #include "modules/websockets/WebSocketFrame.h"
40 #include "modules/websockets/WebSocketHandshake.h"
41 #include "modules/websockets/WebSocketPerMessageDeflate.h"
42 #include "platform/Timer.h"
43 #include "platform/network/SocketStreamHandleClient.h"
44 #include "wtf/Deque.h"
45 #include "wtf/Forward.h"
46 #include "wtf/PassOwnPtr.h"
47 #include "wtf/RefCounted.h"
48 #include "wtf/Vector.h"
49 #include "wtf/text/CString.h"
55 class FileReaderLoader;
56 class SocketStreamHandle;
57 class SocketStreamError;
58 class WebSocketChannelClient;
60 class MainThreadWebSocketChannel : public RefCounted<MainThreadWebSocketChannel>, public SocketStreamHandleClient, public WebSocketChannel, public FileReaderLoaderClient {
61 WTF_MAKE_FAST_ALLOCATED;
63 // You can specify the source file and the line number information
64 // explicitly by passing the last parameter.
65 // In the usual case, they are set automatically and you don't have to
67 static PassRefPtr<MainThreadWebSocketChannel> create(Document* document, WebSocketChannelClient* client, const String& sourceURL = String(), unsigned lineNumber = 0) { return adoptRef(new MainThreadWebSocketChannel(document, client, sourceURL, lineNumber)); }
68 virtual ~MainThreadWebSocketChannel();
70 bool send(const char* data, int length);
72 // WebSocketChannel functions.
73 virtual void connect(const KURL&, const String& protocol) OVERRIDE;
74 virtual String subprotocol() OVERRIDE;
75 virtual String extensions() OVERRIDE;
76 virtual WebSocketChannel::SendResult send(const String& message) OVERRIDE;
77 virtual WebSocketChannel::SendResult send(const ArrayBuffer&, unsigned byteOffset, unsigned byteLength) OVERRIDE;
78 virtual WebSocketChannel::SendResult send(PassRefPtr<BlobDataHandle>) OVERRIDE;
79 virtual unsigned long bufferedAmount() const OVERRIDE;
80 // Start closing handshake. Use the CloseEventCodeNotSpecified for the code
81 // argument to omit payload.
82 virtual void close(int code, const String& reason) OVERRIDE;
83 virtual void fail(const String& reason, MessageLevel, const String&, unsigned lineNumber) OVERRIDE;
84 using WebSocketChannel::fail;
85 virtual void disconnect() OVERRIDE;
87 virtual void suspend() OVERRIDE;
88 virtual void resume() OVERRIDE;
90 // SocketStreamHandleClient functions.
91 virtual void willOpenSocketStream(SocketStreamHandle*) OVERRIDE;
92 virtual void didOpenSocketStream(SocketStreamHandle*) OVERRIDE;
93 virtual void didCloseSocketStream(SocketStreamHandle*) OVERRIDE;
94 virtual void didReceiveSocketStreamData(SocketStreamHandle*, const char*, int) OVERRIDE;
95 virtual void didUpdateBufferedAmount(SocketStreamHandle*, size_t bufferedAmount) OVERRIDE;
96 virtual void didFailSocketStream(SocketStreamHandle*, const SocketStreamError&) OVERRIDE;
98 // FileReaderLoaderClient functions.
99 virtual void didStartLoading();
100 virtual void didReceiveData();
101 virtual void didFinishLoading();
102 virtual void didFail(FileError::ErrorCode);
104 using RefCounted<MainThreadWebSocketChannel>::ref;
105 using RefCounted<MainThreadWebSocketChannel>::deref;
108 // WebSocketChannel functions.
109 virtual void refWebSocketChannel() OVERRIDE { ref(); }
110 virtual void derefWebSocketChannel() OVERRIDE { deref(); }
113 MainThreadWebSocketChannel(Document*, WebSocketChannelClient*, const String&, unsigned);
115 bool appendToBuffer(const char* data, size_t len);
116 void skipBuffer(size_t len);
117 // Repeats parsing data from m_buffer until instructed to stop.
118 void processBuffer();
119 // Parses a handshake response or one frame from m_buffer and processes it.
120 bool processOneItemFromBuffer();
121 void resumeTimerFired(Timer<MainThreadWebSocketChannel>*);
122 void startClosingHandshake(int code, const String& reason);
123 void closingTimerFired(Timer<MainThreadWebSocketChannel>*);
125 // Parses one frame from m_buffer and processes it.
128 // It is allowed to send a Blob as a binary frame if hybi-10 protocol is in use. Sending a Blob
129 // can be delayed because it must be read asynchronously. Other types of data (String or
130 // ArrayBuffer) may also be blocked by preceding sending request of a Blob.
132 // To address this situation, messages to be sent need to be stored in a queue. Whenever a new
133 // data frame is going to be sent, it first must go to the queue. Items in the queue are processed
134 // in the order they were put into the queue. Sending request of a Blob blocks further processing
135 // until the Blob is completely read and sent to the socket stream.
136 enum QueuedFrameType {
137 QueuedFrameTypeString,
138 QueuedFrameTypeVector,
142 WebSocketFrame::OpCode opCode;
143 QueuedFrameType frameType;
144 // Only one of the following items is used, according to the value of frameType.
146 Vector<char> vectorData;
147 RefPtr<BlobDataHandle> blobData;
149 void enqueueTextFrame(const CString&);
150 void enqueueRawFrame(WebSocketFrame::OpCode, const char* data, size_t dataLength);
151 void enqueueBlobFrame(WebSocketFrame::OpCode, PassRefPtr<BlobDataHandle>);
153 void failAsError(const String& reason) { fail(reason, ErrorMessageLevel, m_sourceURLAtConnection, m_lineNumberAtConnection); }
154 void processOutgoingFrameQueue();
155 void abortOutgoingFrameQueue();
157 enum OutgoingFrameQueueStatus {
158 // It is allowed to put a new item into the queue.
159 OutgoingFrameQueueOpen,
160 // Close frame has already been put into the queue but may not have been sent yet;
161 // m_handle->close() will be called as soon as the queue is cleared. It is not
162 // allowed to put a new item into the queue.
163 OutgoingFrameQueueClosing,
164 // Close frame has been sent or the queue was aborted. It is not allowed to put
165 // a new item to the queue.
166 OutgoingFrameQueueClosed
169 // In principle, this method is called only by processOutgoingFrameQueue().
170 // It does work necessary to build frames including Blob loading for queued
171 // data in order. Calling this method directly jumps in the process.
172 bool sendFrame(WebSocketFrame::OpCode, const char* data, size_t dataLength);
174 enum BlobLoaderStatus {
175 BlobLoaderNotStarted,
187 Document* m_document;
188 WebSocketChannelClient* m_client;
189 OwnPtr<WebSocketHandshake> m_handshake;
190 RefPtr<SocketStreamHandle> m_handle;
191 Vector<char> m_buffer;
193 Timer<MainThreadWebSocketChannel> m_resumeTimer;
195 bool m_didFailOfClientAlreadyRun;
196 bool m_receivedClosingHandshake;
197 Timer<MainThreadWebSocketChannel> m_closingTimer;
198 ChannelState m_state;
199 bool m_shouldDiscardReceivedData;
200 unsigned long m_unhandledBufferedAmount;
202 unsigned long m_identifier; // m_identifier == 0 means that we could not obtain a valid identifier.
204 // Private members only for hybi-10 protocol.
205 bool m_hasContinuousFrame;
206 WebSocketFrame::OpCode m_continuousFrameOpCode;
207 Vector<char> m_continuousFrameData;
208 unsigned short m_closeEventCode;
209 String m_closeEventReason;
211 Deque<OwnPtr<QueuedFrame> > m_outgoingFrameQueue;
212 OutgoingFrameQueueStatus m_outgoingFrameQueueStatus;
214 // FIXME: Load two or more Blobs simultaneously for better performance.
215 OwnPtr<FileReaderLoader> m_blobLoader;
216 BlobLoaderStatus m_blobLoaderStatus;
218 String m_sourceURLAtConnection;
219 unsigned m_lineNumberAtConnection;
220 WebSocketPerMessageDeflate m_perMessageDeflate;
221 WebSocketDeflateFramer m_deflateFramer;
224 } // namespace WebCore
226 #endif // MainThreadWebSocketChannel_h