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31 #ifndef WebSocketPerMessageDeflate_h
32 #define WebSocketPerMessageDeflate_h
34 #include "modules/websockets/WebSocketDeflater.h"
35 #include "modules/websockets/WebSocketExtensionProcessor.h"
36 #include "modules/websockets/WebSocketFrame.h"
37 #include "wtf/OwnPtr.h"
38 #include "wtf/PassOwnPtr.h"
42 // WebSocketPerMessageDeflate is a deflater / inflater for a WebSocket message with DEFLATE algorithm.
43 // See http://tools.ietf.org/html/draft-ietf-hybi-permessage-compression-08
44 class WebSocketPerMessageDeflate {
46 WebSocketPerMessageDeflate();
48 PassOwnPtr<WebSocketExtensionProcessor> createExtensionProcessor();
50 void enable(int windowBits, WebSocketDeflater::ContextTakeOverMode);
51 bool enabled() const { return m_enabled; }
53 // Deflate the given frame.
54 // Return true if the method succeeds.
55 // The method succeeds and does nothing if this object is not enabled.
56 // This method may rewrite the parameter.
57 // If the compression is done, the payload member of the frame will point the internal buffer
58 // and the pointer will be valid until resetDeflateBuffer is called.
59 bool deflate(WebSocketFrame&);
61 // Reset the internal buffer used by deflate.
62 // You must call this method between consecutive calls of the deflate method.
63 void resetDeflateBuffer();
65 // Inflate the given frame.
66 // Return true if the method succeeds.
67 // The method succeeds and does nothing if this object is not enabled.
68 // This method may rewrite the parameter.
69 // If the decompression is done, the payload member of the frame will point the internal buffer
70 // and the pointer will be valid until resetInflateBuffer is called.
71 bool inflate(WebSocketFrame&);
73 // Reset the internal buffer used by inflate.
74 // You must call this method between consecutive calls of the inflate method.
75 void resetInflateBuffer();
77 // Return the reason of the last failure in inflate or deflate.
78 String failureReason() { return m_failureReason; }
84 bool m_deflateOngoing;
85 bool m_inflateOngoing;
86 String m_failureReason;
87 OwnPtr<WebSocketDeflater> m_deflater;
88 OwnPtr<WebSocketInflater> m_inflater;
93 #endif // WebSocketPerMessageDeflate_h