119 lines
3.4 KiB
C++
119 lines
3.4 KiB
C++
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// HTTPResponseParser.h
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// Declares the cHTTPResponseParser class representing the parser for incoming HTTP responses
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#pragma once
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#include "HTTPMessage.h"
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#include "TransferEncodingParser.h"
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class cHTTPResponseParser:
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public cHTTPMessage,
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protected cEnvelopeParser::cCallbacks,
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protected cTransferEncodingParser::cCallbacks
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{
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typedef cHTTPMessage Super;
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public:
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class cCallbacks
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{
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public:
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// Force a virtual destructor in descendants:
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virtual ~cCallbacks() {}
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/** Called when an error has occured while parsing. */
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virtual void OnError(const AString & a_ErrorDescription) = 0;
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/** Called when the status line is fully parsed. */
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virtual void OnStatusLine(const AString & a_StatusLine) = 0;
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/** Called when a single header line is parsed. */
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virtual void OnHeaderLine(const AString & a_Key, const AString & a_Value) = 0;
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/** Called when all the headers have been parsed. */
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virtual void OnHeadersFinished(void) = 0;
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/** Called for each chunk of the incoming body data. */
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virtual void OnBodyData(const void * a_Data, size_t a_Size) = 0;
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/** Called when the entire body has been reported by OnBodyData(). */
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virtual void OnBodyFinished(void) = 0;
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};
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cHTTPResponseParser(cCallbacks & a_Callbacks);
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/** Parses the incoming data and calls the appropriate callbacks.
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Returns the number of bytes from the end of a_Data that is already not part of this response.
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Returns AString::npos on an error. */
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size_t Parse(const char * a_Data, size_t a_Size);
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/** Called when the server indicates no more data will be sent (HTTP 1.0 socket closed).
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Finishes all parsing and calls apropriate callbacks (error if incomplete response). */
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void Finish(void);
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/** Returns true if the entire response has been already parsed. */
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bool IsFinished(void) const { return m_IsFinished; }
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protected:
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/** The callbacks used for reporting. */
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cCallbacks & m_Callbacks;
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/** Set to true if an error has been encountered by the parser. */
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bool m_HasHadError;
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/** True if the parser is still parsing the status or headers. */
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bool m_IsInHeaders;
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/** True if the response has been fully parsed. */
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bool m_IsFinished;
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/** The complete status line of the response. Empty if not parsed yet. */
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AString m_StatusLine;
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/** Buffer for the incoming data until the status line is parsed. */
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AString m_Buffer;
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/** Parser for the envelope data (headers) */
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cEnvelopeParser m_EnvelopeParser;
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/** The specific parser for the transfer encoding used by this response. */
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cTransferEncodingParserPtr m_TransferEncodingParser;
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/** Parses the status line out of the m_Buffer.
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Removes the status line from m_Buffer, if appropriate.
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Returns true if the entire status line has been parsed. */
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bool ParseStatusLine(void);
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/** Parses the message body.
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Processes transfer encoding and calls the callbacks for body data.
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Returns the number of bytes from the end of a_Data that is already not part of this response.
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Returns AString::npos on error. */
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size_t ParseBody(const char * a_Data, size_t a_Size);
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/** Called internally when the headers-parsing has just finished. */
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void HeadersFinished(void);
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// cEnvelopeParser::cCallbacks overrides:
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virtual void OnHeaderLine(const AString & a_Key, const AString & a_Value) override;
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// cTransferEncodingParser::cCallbacks overrides:
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virtual void OnError(const AString & a_ErrorDescription) override;
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virtual void OnBodyData(const void * a_Data, size_t a_Size) override;
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virtual void OnBodyFinished(void) override;
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};
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