ctdlphp/ctdlsession.php

   1 <?PHP
   2 // $Id$
   3 //
   4 // This gets called from within the header functions.  It establishes or
   5 // connects to a PHP session, and then connects to Citadel if necessary.
   6 //
   7 // Web designers: please make changes in ctdlheader.php, not here.
   8 //
   9 // Copyright (c) 2003 by Art Cancro <ajc@uncensored.citadel.org>
  10 // This program is released under the terms of the GNU General Public License.
  11
  12
  13 function establish_citadel_session() {
  14
  15         global $session, $clientsocket;
  16
  17         if (strcmp('4.3.0', phpversion()) > 0) {
  18                 die("This program requires PHP 4.3.0 or newer.");
  19         }
  20
  21
  22         session_start();
  23
  24         if (isset($_SESSION["ctdlsession"])) {
  25                 $session = $_SESSION["ctdlsession"];
  26         }
  27         else {
  28                 $session = "CtdlSession." . time() . rand(1000,9999) ;
  29                 $_SESSION["ctdlsession"] = $session;
  30         }
  31
  32         // See if there's a Citadel connection proxy open for this session.
  33         // The name of the socket is identical to the name of the
  34         // session, and it's found in the /tmp directory.
  35
  36         $sockname = "/tmp/" . $session . ".socket" ;
  37         $errno = 0;
  38         $errstr = "";
  39         if (is_array(stat($sockname)))
  40                 $clientsocket = fsockopen(SOCKET_PREFIX.$sockname, 0, $errno, $errstr, 5);
  41         else
  42                 $clientsocket = false;
  43 //// TODO: if we get connection refused...
  44         echo "$socketname - $errno - $errstr";
  45
  46         if (!$clientsocket) {
  47                 // It ain't there, dude.  Open up the proxy. (C version)
  48                 //$cmd = "./sessionproxy " . $sockname ;
  49                 //exec($cmd);
  50
  51                 // It ain't there, dude.  Open up the proxy.  (PHP version)
  52                 if (CITADEL_DEBUG_PROXY){
  53                         $stdout = '>>/tmp/sessionproxyout.txt ';
  54                 }
  55                 else{
  56                         $stdout = '>/dev/null ';
  57                 }
  58
  59                 $cmd = "./sessionproxy.php " . $sockname .
  60                         " </dev/null ".$stdout."2>&1 " .
  61                         " 3>&1 4>&1 5>&1 6>&1 7>&1 8>&1 & " ;
  62                 exec($cmd);
  63                 sleep(1);
  64
  65                 // Keep attempting connections 10 times per second up to 100 times
  66                 $attempts = 0;
  67                 while (!$clientsocket) {
  68                         usleep(100);
  69                         if (is_array(stat($sockname)))
  70                                 $clientsocket = fsockopen(SOCKET_PREFIX.$sockname, 0, $errno, $errstr, 5);
  71                         else
  72                                 $clientsocket = false;
  73                         $attempts += 1;
  74                         if ($attempts > 100) {
  75                                 echo "ERROR: unable to start connection proxy. ";
  76                                 echo "Please contact your system administrator.<BR>\n";
  77                                 flush();
  78                                 exit(1);
  79                         }
  80                 }
  81
  82                 // At this point we have a good connection to Citadel.
  83                 $identity=array(
  84                         "DevelNr" => '0',
  85                         "ClientID" => '8',
  86                         "VersionNumber" => '001',
  87                         "ClientInfoString" => 'PHP web client|',
  88                         "Remote Address" => $_SERVER['REMOTE_ADDR'] );
  89
  90                 ctdl_iden($identity);   // Identify client
  91                 ctdl_MessageFormatsPrefered(array("text/html","text/plain"));
  92                 if (isset($_SESSION["username"])) {
  93                         login_existing_user(
  94                                 $_SESSION["username"],
  95                                 $_SESSION["password"]
  96                         );
  97                 }
  98
  99                 if (isset($_SESSION["room"])) {
 100                         ctdl_goto($_SESSION["room"]);
 101                 }
 102                 else {
 103                         ctdl_goto("_BASEROOM_");
 104                 }
 105         }
 106
 107         if (!isset($_SESSION["serv_humannode"])) {
 108                 $server_info = ctdl_get_serv_info();
 109                 // print_r($server_info);
 110                 $keys = array_keys($server_info);
 111                 foreach ($keys as $key)
 112                         $_SESSION[$key] = $server_info[$key];
 113         }
 114
 115         // If the user is trying to call up any page other than
 116         // login.php logout.php do_login.php,
 117         // and the session is not logged in, redirect to login.php
 118         //
 119         if (isset($_SESSION["logged_in"]) && ($_SESSION["logged_in"] != 1)) {
 120                 $filename = basename(getenv('SCRIPT_NAME'));
 121                 if (    (strcmp($filename, "login.php"))
 122                    &&   (strcmp($filename, "logout.php"))
 123                    &&   (strcmp($filename, "do_login.php"))
 124                 ) {
 125                         header("Location: login.php");
 126                         exit(0);
 127                 }
 128         }
 129
 130
 131 }
 132
 133
 134 //
 135 // Clear out both our Citadel session and our PHP session.  We're done.
 136 //
 137 function ctdl_end_session() {
 138         global $clientsocket, $session;
 139
 140         // Tell the Citadel server to terminate our connection.
 141         // (The extra newlines force it to see that the Citadel session
 142         // ended, and the proxy will quit.)
 143         //
 144         fwrite($clientsocket, "QUIT\n\n\n\n\n\n\n\n\n\n\n");
 145         $response = fgets($clientsocket, 4096);         // IGnore response
 146         fclose($clientsocket);
 147         unset($clientsocket);
 148
 149         // Now clear our PHP session.
 150         $_SESSION = array();
 151         session_write_close();
 152 }
 153
 154 ?>