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// **********************************************************************
//
// Copyright (c) 2003-2018 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************

#ifndef ICE_HTTP_PARSER_H
#define ICE_HTTP_PARSER_H

#include <IceUtil/Shared.h>
#include <IceUtil/Handle.h>
#include <Ice/Config.h>

namespace IceInternal
{

std::vector<unsigned char> calcSHA1(const std::vector<unsigned char>&);

typedef std::map<std::string, std::pair<std::string, std::string> > HeaderFields;

class WebSocketException
{
public:
    WebSocketException(const std::string&);

    std::string reason;
};

class HttpParser : public IceUtil::Shared
{
public:

    HttpParser();

    enum Type
    {
        TypeUnknown,
        TypeRequest,
        TypeResponse
    };

    const Ice::Byte* isCompleteMessage(const Ice::Byte*, const Ice::Byte*) const;

    bool parse(const Ice::Byte*, const Ice::Byte*);

    Type type() const;

    std::string method() const;
    std::string uri() const;
    int versionMajor() const;
    int versionMinor() const;

    int status() const;
    std::string reason() const;

    bool getHeader(const std::string&, std::string&, bool) const;

    std::map<std::string, std::string> getHeaders() const;

private:

    Type _type;

    std::string _method;
    std::string _uri;

    HeaderFields _headers;
    std::string _headerName;

    int _versionMajor;
    int _versionMinor;

    int _status;
    std::string _reason;

    enum State
    {
        StateInit,
        StateType,
        StateTypeCheck,
        StateRequest,
        StateRequestMethod,
        StateRequestMethodSP,
        StateRequestURI,
        StateRequestURISP,
        StateRequestLF,
        StateHeaderFieldStart,
        StateHeaderFieldContStart,
        StateHeaderFieldCont,
        StateHeaderFieldNameStart,
        StateHeaderFieldName,
        StateHeaderFieldNameEnd,
        StateHeaderFieldValueStart,
        StateHeaderFieldValue,
        StateHeaderFieldValueEnd,
        StateHeaderFieldLF,
        StateHeaderFieldEndLF,
        StateVersion,
        StateVersionH,
        StateVersionHT,
        StateVersionHTT,
        StateVersionHTTP,
        StateVersionMajor,
        StateVersionMinor,
        StateResponse,
        StateResponseVersionSP,
        StateResponseStatus,
        StateResponseReasonStart,
        StateResponseReason,
        StateResponseLF,
        StateComplete
    };
    State _state;
};
typedef IceUtil::Handle<HttpParser> HttpParserPtr;

}

#endif