PPTConnection.h

// PPTConnection.h
 
// This file is part of bes, A C++ back-end server implementation framework
// for the OPeNDAP Data Access Protocol.
 
// Copyright (c) 2004-2009 University Corporation for Atmospheric Research
// Author: Patrick West <pwest@ucar.edu> and Jose Garcia <jgarcia@ucar.edu>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//
// You can contact University Corporation for Atmospheric Research at
// 3080 Center Green Drive, Boulder, CO 80301
 
// (c) COPYRIGHT University Corporation for Atmospheric Research 2004-2005
// Please read the full copyright statement in the file COPYRIGHT_UCAR.
//
// Authors:
//      pwest       Patrick West <pwest@ucar.edu>
//      jgarcia     Jose Garcia <jgarcia@ucar.edu>
 
#ifndef PPTConnection_h
#define PPTConnection_h 1
 
#include "Connection.h"
#include "PPTProtocolNames.h"
 
class Socket;
 
#define PPT_CHUNK_HEADER_SPACE 15
 
class PPTConnection: public Connection {
private:
    int _timeout = 0;
    char * _inBuff = nullptr;
    int _inBuff_len = 0;
 
    PPTConnection() = default;
 
    virtual int readChunkHeader(char *inBuff, int buff_size);
    void sendChunk(const std::string &buffer, std::map<std::string, std::string> &extensions) override;
    virtual void receive(std::ostream &strm, const int len);
 
protected:
    explicit PPTConnection(int timeout) : _timeout(timeout) { }
 
    virtual int readBuffer(char *inBuff, const unsigned int buff_size);
    virtual int readBufferNonBlocking(char *inBuff, const int buff_size);
 
    void send(const std::string &buffer) override;
    virtual void read_extensions(std::map<std::string, std::string> &extensions, const std::string &xstr);
 
public:
    ~PPTConnection() override;
 
    void initConnection() override = 0;
    void closeConnection() override = 0;
 
    std::string exit() override
    {
        return PPT_EXIT_NOW;
    }
 
    void send(const std::string &buffer, std::map<std::string, std::string> &extensions) override;
    void sendExtensions(std::map<std::string, std::string> &extensions) override;
    void sendExit() override;
    bool receive(std::map<std::string, std::string> &extensions, std::ostream *strm = nullptr) override;
 
    unsigned int getRecvChunkSize() override;
    unsigned int getSendChunkSize() override;
 
    void dump(std::ostream &strm) const override;
};
 
#endif // PPTConnection_h