functions/imap_general.php

   1 <?php
   2    /**
   3     **  imap.php
   4     **
   5     **  This implements all functions that do general imap functions.
   6     **/
   7
   8    $imap_general_debug = false;
   9    //$imap_general_debug = false;
  10
  11    /******************************************************************************
  12     **  Reads the output from the IMAP stream.  If handle_errors is set to true,
  13     **  this will also handle all errors that are received.  If it is not set,
  14     **  the errors will be sent back through $response and $message
  15     ******************************************************************************/
  16    function sqimap_read_data ($imap_stream, $pre, $handle_errors, &$response, &$message) {
  17       global $color, $squirrelmail_language, $imap_general_debug;
  18
  19       $counter = 0;
  20       do {
  21           $data[$counter] = $read = fgets ($imap_stream, 4096);
  22           if ($imap_general_debug) { echo "<small><tt><font color=cc0000>$read</font></tt></small><br>"; flush(); }
  23           $counter++;
  24       } while (! ereg("^$pre (OK|BAD|NO)(.*)$", $read, $regs));
  25
  26       $response = $regs[1];
  27       $message = trim($regs[2]);
  28
  29       if ($imap_general_debug) echo "--<br>";
  30
  31       if ($handle_errors == true) {
  32          if ($response == "NO") {
  33             set_up_language($squirrelmail_language);
  34             echo "<br><b><font color=$color[2]>\n";
  35             echo _("ERROR : Could not complete request.");
  36             echo "</b><br>\n";
  37             echo _("Reason Given: ");
  38             echo $message . "</font><br>\n";
  39             exit;
  40          } else if ($response == "BAD") {
  41             set_up_language($squirrelmail_language);
  42             echo "<br><b><font color=$color[2]>\n";
  43             echo _("ERROR : Bad or malformed request.");
  44             echo "</b><br>\n";
  45             echo _("Server responded: ");
  46             echo $message . "</font><br>\n";
  47             exit;
  48          }
  49       }
  50
  51       return $data;
  52    }
  53
  54    /******************************************************************************
  55     **  Logs the user into the imap server.  If $hide is set, no error messages
  56     **  will be displayed.  This function returns the imap connection handle.
  57     ******************************************************************************/
  58    function sqimap_login ($username, $password, $imap_server_address, $imap_port, $hide) {
  59       global $color, $squirrelmail_language, $HTTP_ACCEPT_LANGUAGE, $onetimepad;
  60
  61       $imap_stream = fsockopen ($imap_server_address, $imap_port, &$error_number, &$error_string);
  62       $server_info = fgets ($imap_stream, 1024);
  63
  64       // Decrypt the password
  65       $password = OneTimePadDecrypt($password, $onetimepad);
  66
  67       /** Do some error correction **/
  68       if (!$imap_stream) {
  69          if (!$hide) {
  70             set_up_language($squirrelmail_language, true);
  71             printf (_("Error connecting to IMAP server: %s.")."<br>\r\n", $imap_server_address);
  72             echo "$error_number : $error_string<br>\r\n";
  73          }
  74          exit;
  75       }
  76
  77       fputs ($imap_stream, "a001 LOGIN \"$username\" \"$password\"\r\n");
  78       $read = sqimap_read_data ($imap_stream, "a001", false, $response, $message);
  79
  80       /** If the connection was not successful, lets see why **/
  81       if ($response != "OK") {
  82          if (!$hide) {
  83             if ($response != "NO") {
  84                // "BAD" and anything else gets reported here.
  85                set_up_language($squirrelmail_language, true);
  86                if ($response == "BAD")
  87                    printf (_("Bad request: %s")."<br>\r\n", $message);
  88                else
  89                    printf (_("Unknown error: %s") . "<br>\n", $message);
  90                echo "<br>";
  91                echo _("Read data:") . "<br>\n";
  92                if (is_array($read))
  93                {
  94                    foreach ($read as $line)
  95                    {
  96                        echo htmlspecialchars($line) . "<br>\n";
  97                    }
  98                }
  99                exit;
 100             } else {
 101                // If the user does not log in with the correct
 102                // username and password it is not possible to get the
 103                // correct locale from the user's preferences.
 104                // Therefore, apply the same hack as on the login
 105                // screen.
 106
 107                // $squirrelmail_language is set by a cookie when
 108                // the user selects language and logs out
 109
 110                set_up_language($squirrelmail_language, true);
 111
 112                ?>
 113                   <html>
 114                      <body bgcolor=ffffff>
 115                         <br>
 116                         <center>
 117                         <table width=70% noborder bgcolor=ffffff align=center>
 118                            <tr>
 119                               <td bgcolor=dcdcdc>
 120                                  <font color=cc0000>
 121                                  <center>
 122                                  <?php echo _("ERROR") ?>
 123                                  </center>
 124                                  </font>
 125                               </td>
 126                            </tr>
 127                            <tr>
 128                               <td>
 129                                  <center>
 130                                  <?php echo _("Unknown user or password incorrect.") ?><br>
 131                                  <a href="login.php" target="_top"><?php echo _("Click here to try again") ?></a>
 132                                  </center>
 133                               </td>
 134                            </tr>
 135                         </table>
 136                         </center>
 137                      </body>
 138                   </html>
 139                <?php
 140                session_destroy();
 141                exit;
 142             }
 143          } else {
 144             exit;
 145          }
 146       }
 147
 148       return $imap_stream;
 149    }
 150
 151
 152
 153
 154    /******************************************************************************
 155     **  Simply logs out the imap session
 156     ******************************************************************************/
 157    function sqimap_logout ($imap_stream) {
 158       fputs ($imap_stream, "a001 LOGOUT\r\n");
 159    }
 160
 161 function sqimap_capability($imap_stream, $capability) {
 162         global $sqimap_capabilities;
 163         global $imap_general_debug;
 164
 165         if (!is_array($sqimap_capabilities)) {
 166                 fputs ($imap_stream, "a001 CAPABILITY\r\n");
 167                 $read = sqimap_read_data($imap_stream, "a001", true, $a, $b);
 168
 169                 $c = explode(' ', $read[0]);
 170                 for ($i=2; $i < count($c); $i++) {
 171                         list($k, $v) = explode('=', $c[$i]);
 172                         $sqimap_capabilities[$k] = ($v)?$v:TRUE;
 173                 }
 174         }
 175         return $sqimap_capabilities[$capability];
 176 }
 177
 178    /******************************************************************************
 179     **  Returns the delimeter between mailboxes:  INBOX/Test, or INBOX.Test...
 180     ******************************************************************************/
 181 function sqimap_get_delimiter ($imap_stream = false) {
 182         global $imap_general_debug;
 183     global $sqimap_delimiter;
 184
 185         /* Do some caching here */
 186     if (!$sqimap_delimiter) {
 187                 if (sqimap_capability($imap_stream, "NAMESPACE")) {
 188                         /* According to something that I can't find, this is supposed to work on all systems
 189                            OS: This won't work in Courier IMAP.
 190                            OS:  According to rfc2342 response from NAMESPACE command is:
 191                            OS:  * NAMESPACE (PERSONAL NAMESPACES) (OTHER_USERS NAMESPACE) (SHARED NAMESPACES)
 192                            OS:  We want to lookup all personal NAMESPACES...
 193                         */
 194                         fputs ($imap_stream, "a001 NAMESPACE\r\n");
 195                         $read = sqimap_read_data($imap_stream, "a001", true, $a, $b);
 196                         if (eregi('\* NAMESPACE +(\( *\(.+\) *\)|NIL) +(\( *\(.+\) *\)|NIL) +(\( *\(.+\) *\)|NIL)', $read[0], $data)) {
 197                                 if (eregi('^\( *\((.*)\) *\)', $data[1], $data2))
 198                                         $pn = $data2[1];
 199                                 $pna = explode(')(', $pn);
 200                                 while (list($k, $v) = each($pna))
 201                                 {
 202                                         list($_, $n, $_, $d) = explode('"', $v);
 203                                         $pn[$n] = $d;
 204                                 }
 205 /* OS: We don't need this code right now, it is for other_users and shared folders
 206                                 if (eregi('^\( *\((.*)\) *\)', $data[2], $data2))
 207                                         $on = $data2[1];
 208                                 if (eregi('^\( *\((.*)\) *\)', $data[3], $data2))
 209                                         $sn = $data2[1];
 210                                 unset($data);
 211                                 $ona = explode(')(', $on);
 212                                 while (list($k, $v) = each($ona))
 213                                 {
 214                                         list($_, $n, $_, $d) = explode('"', $v);
 215                                         $on[$n] = $d;
 216                                 }
 217                                 $sna = explode(')(', $sn);
 218                                 while (list($k, $v) = each($sna))
 219                                 {
 220                                         list($_, $n, $_, $d) = explode('"', $v);
 221                                         $sn[$n] = $d;
 222                                 }
 223 */
 224                         }
 225                         $sqimap_delimiter = $pn[0];
 226                 } else {
 227                         fputs ($imap_stream, ". LIST \"INBOX\" \"\"\r\n");
 228                         $read = sqimap_read_data($imap_stream, ".", true, $a, $b);
 229                         $quote_position = strpos ($read[0], "\"");
 230                         $sqimap_delimiter = substr ($read[0], $quote_position+1, 1);
 231                 }
 232         }
 233         return $sqimap_delimiter;
 234 }
 235
 236
 237    /******************************************************************************
 238     **  Gets the number of messages in the current mailbox.
 239     ******************************************************************************/
 240    function sqimap_get_num_messages ($imap_stream, $mailbox) {
 241       fputs ($imap_stream, "a001 EXAMINE \"$mailbox\"\r\n");
 242       $read_ary = sqimap_read_data ($imap_stream, "a001", true, $result, $message);
 243       for ($i = 0; $i < count($read_ary); $i++) {
 244          if (ereg("[^ ]+ +([^ ]+) +EXISTS", $read_ary[$i], $regs)) {
 245             return $regs[1];
 246          }
 247       }
 248       return "BUG!  Couldn't get number of messages in $mailbox!";
 249    }
 250
 251
 252    /******************************************************************************
 253     **  Returns a displayable email address
 254     ******************************************************************************/
 255    function sqimap_find_email ($string) {
 256       /** Luke Ehresman <lehresma@css.tayloru.edu>
 257        ** <lehresma@css.tayloru.edu>
 258        ** lehresma@css.tayloru.edu
 259        **
 260        ** What about
 261        **    lehresma@css.tayloru.edu (Luke Ehresman)
 262        **/
 263
 264       if (ereg("<([^>]+)>", $string, $regs)) {
 265           $string = $regs[1];
 266       }
 267       return trim($string);
 268    }
 269
 270
 271    /******************************************************************************
 272     **  Takes the From: field, and creates a displayable name.
 273     **    Luke Ehresman <lkehresman@yahoo.com>
 274     **           becomes:   Luke Ehresman
 275     **    <lkehresman@yahoo.com>
 276     **           becomes:   lkehresman@yahoo.com
 277     ******************************************************************************/
 278    function sqimap_find_displayable_name ($string) {
 279       $string = " ".trim($string);
 280       $orig_string = $string;
 281       if (strpos($string, "<") && strpos($string, ">")) {
 282          if (strpos($string, "<") == 1) {
 283             $string = sqimap_find_email($string);
 284          } else {
 285             $string = trim($string);
 286             $string = substr($string, 0, strpos($string, "<"));
 287             $string = ereg_replace ("\"", "", $string);
 288          }
 289
 290          if (trim($string) == "") {
 291             $string = sqimap_find_email($orig_string);
 292          }
 293       }
 294       return $string;
 295    }
 296
 297
 298    /******************************************************************************
 299     **  Returns the number of unseen messages in this folder
 300     ******************************************************************************/
 301    function sqimap_unseen_messages ($imap_stream, &$num_unseen, $mailbox) {
 302       //fputs ($imap_stream, "a001 SEARCH UNSEEN NOT DELETED\r\n");
 303       fputs ($imap_stream, "a001 STATUS \"$mailbox\" (UNSEEN)\r\n");
 304       $read_ary = sqimap_read_data ($imap_stream, "a001", true, $result, $message);
 305       ereg("UNSEEN ([0-9]+)", $read_ary[0], $regs);
 306       return $regs[1];
 307    }
 308
 309
 310    /******************************************************************************
 311     **  Saves a message to a given folder -- used for saving sent messages
 312     ******************************************************************************/
 313    function sqimap_append ($imap_stream, $sent_folder, $length) {
 314       fputs ($imap_stream, "a001 APPEND \"$sent_folder\" (\\Seen) \{$length}\r\n");
 315       $tmp = fgets ($imap_stream, 1024);
 316    }
 317
 318    function sqimap_append_done ($imap_stream) {
 319       fputs ($imap_stream, "\r\n");
 320       $tmp = fgets ($imap_stream, 1024);
 321    }
 322 ?>