/*
* This file is part of rasdaman community.
*
* Rasdaman community is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Rasdaman community 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with rasdaman community.  If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann /
rasdaman GmbH.
*
* For more information please see <http://www.rasdaman.org>
* or contact Peter Baumann via <baumann@rasdaman.com>.
/
/**
 * SOURCE: rasmgr_comm.hh
 *
 * MODULE: rasmgr
 * CLASS:  HTTPComm
 *
 * PURPOSE:
 *   Performs reliable, but blocking HTTP communication. used by the slave rasmgr
 *    
 * COMMENTS:
 *   Will be removed, the plan is to have only non-blocking communication
 *
*/

#ifndef RASMGR_COMM_HH
#define RASMGR_COMM_HH

#include "rasmgr.hh"

#define MAXMSG 1024
#define MAXMSGOUTBUFF 20000 


class HTTPComm
  {
    public:
      HTTPComm();
      ~HTTPComm();
      void closeListenSocket();
      void shouldExit();
      char *decodeFlag(int statusFlag);
    protected:
      int initListenSocket(int port);
      int makeSocket(int port);
      int sendAnswer(int socket,int len);
      int getMessage();
            
    protected:
      bool isMessage(const char *messageStart);
     // pid_t parentPID;
      int listen_socket;
      fd_set active_fd_set,read_fd_set;
   
      struct timeval tv;
      timeval *tvptr;
      char *header;
      char *body;
      char inBuffer[MAXMSG];
      char outBuffer[MAXMSGOUTBUFF];
            
      bool exitRequest;
    private:
      int realGetMessage();  
   };	

// status flags that rasmgr understands 
// - these come from rasserver   
#define SERVER_DOWN         0
#define SERVER_AVAILABLE    1
#define SERVER_REGULARSIG   3
// - this comes from slave rasmgr and LSM  
#define SERVER_CRASHED      2

// textual representation of the above status flags -- PB 2004-jul-16
#define SERVER_DOWN_TXT       "server down"
#define SERVER_AVAILABLE_TXT  "server available"
#define SERVER_REGULARSIG_TXT "server alive"
#define SERVER_CRASHED_TXT    "server aborted"

   
 /* This two functions where written late in the night, when we came back from BLVA
    (Bayerisches Landesvermessungsamt), where we had problems on DEC+CompaqTrue64
     this &@$! operating system wasn't able to send a message in one piece which was written in one piece
 */
int readWholeMessage(int socket,char *destBuffer,int buffSize);
int writeWholeMessage(int socket,char *destBuffer,int buffSize);
   
#endif