<?php
  /**************************************************************************\
  * phpGroupWare API - Network                                               *
  * This file written by Mark Peters <skeeter@phpgroupware.org>              *
  * Handles opening network socket connections, taking proxy into account    *
  * Copyright (C) 2000, 2001 Mark Peters                                     *
  * -------------------------------------------------------------------------*
  * This library is part of the phpGroupWare API                             *
  * http://www.phpgroupware.org/api                                          * 
  * ------------------------------------------------------------------------ *
  * 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 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA            *
  \**************************************************************************/

  /* $Id$ */

class network
{
  var $socket;
  var $addcrlf = TRUE;
  var $error;
  var $errorset = 0;

  function network($addcrlf=true)
  {
    $this->errorset = 0;
    $this->set_addcrlf($addcrlf);
  }

  function set_addcrlf($value)
  {
    $this->addcrlf = $value;
  }

  function add_crlf($str)
  {
    if($this->addcrlf) {
      $str .= "\r\n";
    }
    return $str;
  }

  function set_error($code,$msg,$desc)
  {
    $this->error = array("code","msg","desc");
    $this->error["code"] = $code;
    $this->error["msg"] = $msg;
    $this->error["desc"] = $desc;
//    $this->close_port();
    $this->errorset = 1;
    return 0;
  }

  function open_port($server,$port,$timeout=15)
  {
    global $phpgw_info;

    switch($port) {
      case 80:
      case 443:
	if((isset($phpgw_info["server"]["httpproxy_server"]) && $phpgw_info["server"]["httpproxy_server"]) &&
	   (isset($phpgw_info["server"]["httpproxy_port"]) && $phpgw_info["server"]["httpproxy_port"])) {
	  $server = $phpgw_info["server"]["httpproxy_server"];
	  $port   = (int)$phpgw_info["server"]["httpproxy_port"];
	}
	break;
    }
    if(floor(phpversion()) == 4)
      $this->socket = fsockopen($server,$port,&$errcode,&$errmsg,$timeout);
    else
      $this->socket = fsockopen($server,$port,&$errcode,&$errmsg);
    if (!$this->socket) {
      return $this->set_error("Error","$errcode:$errmsg","Connection to $server:$port failed - could not open socket.");
    } else {
      return 1;
    }
  }

  function close_port()
  {
    return fclose($this->socket);
  }

  function read_port()
  {
    return fgets($this->socket, 1024);
  }

  function bs_read_port($bytes)
  {
    return fread($this->socket, $bytes);
  }

  function write_port($str)
  {
    $ok = fputs($this->socket,$this->add_crlf($str));
    if (!$ok)
    {
      return $this->set_error("Error","Connection Lost","lost connection to server");
    } else {
      return 1;
    }    
  }

  function bs_write_port($str,$bytes=0)
  {
    if ($bytes)
      $ok = fwrite($this->socket,$this->add_crlf($str),$bytes);
    else
      $ok = fwrite($this->socket,$this->add_crlf($str));

    if (!$ok)
    {
      return $this->set_error("Error","Connection Lost","lost connection to server");
    } else {
      return 1;
    }    
  }

  function msg2socket($str,$expected_response,$response)
  {
    if(!$this->socket && substr($expected_response,1,1) == "+") {
      return $this->set_error("521",
			      "socket does not exist",
			      "The required socket does not exist. The settings for your mail server may be wrong.");
    }
    if (!$this->write_port($str)) {
      if(substr($expected_response,1,1) == "+") {
	return $this->set_error("420",
				"lost connection",
				"Lost connection to pop server.");
      } else {
	return 0;
      }
    }
    $response = $this->read_port();
    if (!ereg(strtoupper($expected_response),strtoupper($response))) {
      if(substr($expected_response,1,1) == "+") {
	return $this->set_error("550",
				"",
				"");
      }	
      $pos = strpos(" ",$response);
      return $this->set_error(substr($response,0,$pos),
			      "invalid response($expected_response)",
			      substr($response,($pos + 1),(strlen($response)-$pos)));
    } else {
      return 1;
     }
  }

  // return contents of a web url as an array or false if timeout
  function gethttpsocketfile($file)
  {
    global $phpgw_info;

    $server = str_replace("http://","",$file);
    $file = strstr($server,"/");
    $server = str_replace("$file","",$server);
    if ($phpgw_info["server"]["httpproxy_server"]) {
       if ($this->open_port($server,80, 15)) {
          if (! $this->write_port("GET http://" . $server . $file . " HTTP/1.0\n\n")) {
          	return False;
          }
          $i = 0;
          while ($line = $this->read_port()) {
             if (feof($this->socket)) {
                break;
             }
             $lines[] = $line;
             $i++;
          }
          $this->close_port();
          return $lines;
       } else {
          return False;
       }
    } else {
       if ($this->open_port($server, 80, 15)) {
          if (!$this->write_port("GET $file HTTP/1.0\nHost: $server\n\n")) {
          	return 0;
          }
          while ($line = $this->read_port()) {
             $lines[] = $line;
          }
          $this->close_port();
          return $lines;
       } else {
          return 0;
       }
    }
  }
}