HTTPMessageParser.h

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// HTTPMessageParser.h

// Declares the cHTTPMessageParser class that parses HTTP messages (request or response) being pushed into the parser,
// and reports the individual parts via callbacks





#pragma once

#include "EnvelopeParser.h"
#include "TransferEncodingParser.h"





class cHTTPMessageParser:
    protected cEnvelopeParser::cCallbacks,
    protected cTransferEncodingParser::cCallbacks
{
public:
    class cCallbacks
    {
    public:
        // Force a virtual destructor in descendants:
        virtual ~cCallbacks() {}

        virtual void OnError(const AString & a_ErrorDescription) = 0;

        virtual void OnFirstLine(const AString & a_FirstLine) = 0;

        virtual void OnHeaderLine(const AString & a_Key, const AString & a_Value) = 0;

        virtual void OnHeadersFinished(void) = 0;

        virtual void OnBodyData(const void * a_Data, size_t a_Size) = 0;

        virtual void OnBodyFinished(void) = 0;
    };

    cHTTPMessageParser(cCallbacks & a_Callbacks);

    size_t Parse(const char * a_Data, size_t a_Size);

    void Finish(void);

    bool IsFinished(void) const { return m_IsFinished; }

    void Reset(void);


protected:

    cCallbacks & m_Callbacks;

    bool m_HasHadError;

    bool m_IsFinished;

    AString m_FirstLine;

    AString m_Buffer;

    cEnvelopeParser m_EnvelopeParser;

    cTransferEncodingParserPtr m_TransferEncodingParser;

    AString m_TransferEncoding;

    size_t m_ContentLength;


    size_t ParseFirstLine(void);

    size_t ParseBody(const char * a_Data, size_t a_Size);

    void HeadersFinished(void);

    // cEnvelopeParser::cCallbacks overrides:
    virtual void OnHeaderLine(const AString & a_Key, const AString & a_Value) override;

    // cTransferEncodingParser::cCallbacks overrides:
    virtual void OnError(const AString & a_ErrorDescription) override;
    virtual void OnBodyData(const void * a_Data, size_t a_Size) override;
    virtual void OnBodyFinished(void) override;
};