response_parser.h

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// Copyright (C) 2017-2018,2021 Internet Systems Consortium, Inc. ("ISC")
//
// 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 HTTP_RESPONSE_PARSER_H
#define HTTP_RESPONSE_PARSER_H

#include <http/http_message_parser_base.h>
#include <http/response.h>
#include <boost/shared_ptr.hpp>

namespace isc {
namespace http {

class HttpResponseParser;

typedef boost::shared_ptr<HttpResponseParser> HttpResponseParserPtr;

class HttpResponseParser : public HttpMessageParserBase {
public:



    static const int RECEIVE_START_ST = SM_DERIVED_STATE_MIN + 101;

    static const int HTTP_VERSION_H_ST = SM_DERIVED_STATE_MIN + 102;

    static const int HTTP_VERSION_T1_ST = SM_DERIVED_STATE_MIN + 103;

    static const int HTTP_VERSION_T2_ST = SM_DERIVED_STATE_MIN + 104;

    static const int HTTP_VERSION_P_ST = SM_DERIVED_STATE_MIN + 105;

    static const int HTTP_VERSION_SLASH_ST = SM_DERIVED_STATE_MIN + 106;

    static const int HTTP_VERSION_MAJOR_START_ST = SM_DERIVED_STATE_MIN + 107;

    static const int HTTP_VERSION_MAJOR_ST = SM_DERIVED_STATE_MIN + 108;

    static const int HTTP_VERSION_MINOR_START_ST = SM_DERIVED_STATE_MIN + 109;

    static const int HTTP_VERSION_MINOR_ST = SM_DERIVED_STATE_MIN + 110;

    static const int HTTP_STATUS_CODE_START_ST = SM_DERIVED_STATE_MIN + 111;

    static const int HTTP_STATUS_CODE_ST = SM_DERIVED_STATE_MIN + 112;

    static const int HTTP_PHRASE_START_ST = SM_DERIVED_STATE_MIN + 113;

    static const int HTTP_PHRASE_ST = SM_DERIVED_STATE_MIN + 114;

    static const int EXPECTING_NEW_LINE1_ST = SM_DERIVED_STATE_MIN + 115;

    static const int HEADER_LINE_START_ST = SM_DERIVED_STATE_MIN + 116;

    static const int HEADER_LWS_ST = SM_DERIVED_STATE_MIN + 117;

    static const int HEADER_NAME_ST = SM_DERIVED_STATE_MIN + 118;

    static const int SPACE_BEFORE_HEADER_VALUE_ST = SM_DERIVED_STATE_MIN + 119;

    static const int HEADER_VALUE_ST = SM_DERIVED_STATE_MIN + 120;

    static const int EXPECTING_NEW_LINE2_ST = SM_DERIVED_STATE_MIN + 121;

    static const int EXPECTING_NEW_LINE3_ST = SM_DERIVED_STATE_MIN + 122;

    static const int HTTP_BODY_ST = SM_DERIVED_STATE_MIN + 123;


    explicit HttpResponseParser(HttpResponse& response);

    void initModel();

private:

    virtual void defineStates();



    void receiveStartHandler();

    void versionHTTPHandler(const char expected_letter,
                            const unsigned int next_state);

    void numberStartHandler(const unsigned int next_state,
                            const std::string& number_name,
                            unsigned int* const storage);

    void numberHandler(const char following_character,
                       const unsigned int next_state,
                       const std::string& number_name,
                       unsigned int* const storage);

    void phraseStartHandler();

    void phraseHandler();

    void expectingNewLineHandler(const unsigned int next_state);

    void headerLineStartHandler();

    void headerLwsHandler();

    void headerNameHandler();

    void spaceBeforeHeaderValueHandler();

    void headerValueHandler();

    void bodyHandler();


    HttpResponse& response_;

    HttpResponseContextPtr context_;
};

} // end of namespace isc::http
} // end of namespace isc

#endif