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, 0);
  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 \"" . quotemeta($username) .
  78          "\" \"" . quotemeta($password) . "\"\r\n");
  79       $read = sqimap_read_data ($imap_stream, "a001", false, $response, $message);
  80
  81       /** If the connection was not successful, lets see why **/
  82       if ($response != "OK") {
  83          if (!$hide) {
  84             if ($response != "NO") {
  85                // "BAD" and anything else gets reported here.
  86                set_up_language($squirrelmail_language, true);
  87                if ($response == "BAD")
  88                    printf (_("Bad request: %s")."<br>\r\n", $message);
  89                else
  90                    printf (_("Unknown error: %s") . "<br>\n", $message);
  91                echo "<br>";
  92                echo _("Read data:") . "<br>\n";
  93                if (is_array($read))
  94                {
  95                    foreach ($read as $line)
  96                    {
  97                        echo htmlspecialchars($line) . "<br>\n";
  98                    }
  99                }
 100                exit;
 101             } else {
 102                // If the user does not log in with the correct
 103                // username and password it is not possible to get the
 104                // correct locale from the user's preferences.
 105                // Therefore, apply the same hack as on the login
 106                // screen.
 107
 108                // $squirrelmail_language is set by a cookie when
 109                // the user selects language and logs out
 110
 111                set_up_language($squirrelmail_language, true);
 112
 113                ?>
 114                   <html>
 115                      <body bgcolor=ffffff>
 116                         <br>
 117                         <center>
 118                         <table width=70% noborder bgcolor=ffffff align=center>
 119                            <tr>
 120                               <td bgcolor=dcdcdc>
 121                                  <font color=cc0000>
 122                                  <center>
 123                                  <?php echo _("ERROR") ?>
 124                                  </center>
 125                                  </font>
 126                               </td>
 127                            </tr>
 128                            <tr>
 129                               <td>
 130                                  <center>
 131                                  <?php echo _("Unknown user or password incorrect.") ?><br>
 132                                  <a href="login.php" target="_top"><?php echo _("Click here to try again") ?></a>
 133                                  </center>
 134                               </td>
 135                            </tr>
 136                         </table>
 137                         </center>
 138                      </body>
 139                   </html>
 140                <?php
 141                session_destroy();
 142                exit;
 143             }
 144          } else {
 145             exit;
 146          }
 147       }
 148
 149       return $imap_stream;
 150    }
 151
 152
 153
 154
 155    /******************************************************************************
 156     **  Simply logs out the imap session
 157     ******************************************************************************/
 158    function sqimap_logout ($imap_stream) {
 159       fputs ($imap_stream, "a001 LOGOUT\r\n");
 160    }
 161
 162 function sqimap_capability($imap_stream, $capability) {
 163         global $sqimap_capabilities;
 164         global $imap_general_debug;
 165
 166         if (!is_array($sqimap_capabilities)) {
 167                 fputs ($imap_stream, "a001 CAPABILITY\r\n");
 168                 $read = sqimap_read_data($imap_stream, "a001", true, $a, $b);
 169
 170                 $c = explode(' ', $read[0]);
 171                 for ($i=2; $i < count($c); $i++) {
 172                         list($k, $v) = explode('=', $c[$i]);
 173                         $sqimap_capabilities[$k] = ($v)?$v:TRUE;
 174                 }
 175         }
 176         return $sqimap_capabilities[$capability];
 177 }
 178
 179    /******************************************************************************
 180     **  Returns the delimeter between mailboxes:  INBOX/Test, or INBOX.Test...
 181     ******************************************************************************/
 182 function sqimap_get_delimiter ($imap_stream = false) {
 183    global $imap_general_debug;
 184    global $sqimap_delimiter;
 185    global $optional_delimiter;
 186
 187    /* Use configured delimiter if set */
 188    if((!empty($optional_delimiter)) && $optional_delimiter != "detect") {
 189       return $optional_delimiter;
 190    }
 191
 192         /* Do some caching here */
 193     if (!$sqimap_delimiter) {
 194                 if (sqimap_capability($imap_stream, "NAMESPACE")) {
 195                         /* According to something that I can't find, this is supposed to work on all systems
 196                            OS: This won't work in Courier IMAP.
 197                            OS:  According to rfc2342 response from NAMESPACE command is:
 198                            OS:  * NAMESPACE (PERSONAL NAMESPACES) (OTHER_USERS NAMESPACE) (SHARED NAMESPACES)
 199                            OS:  We want to lookup all personal NAMESPACES...
 200                         */
 201                         fputs ($imap_stream, "a001 NAMESPACE\r\n");
 202                         $read = sqimap_read_data($imap_stream, "a001", true, $a, $b);
 203                         if (eregi('\* NAMESPACE +(\( *\(.+\) *\)|NIL) +(\( *\(.+\) *\)|NIL) +(\( *\(.+\) *\)|NIL)', $read[0], $data)) {
 204                                 if (eregi('^\( *\((.*)\) *\)', $data[1], $data2))
 205                                         $pn = $data2[1];
 206                                 $pna = explode(')(', $pn);
 207                                 while (list($k, $v) = each($pna))
 208                                 {
 209                                         list($_, $n, $_, $d) = explode('"', $v);
 210                                         $pn[$n] = $d;
 211                                 }
 212 /* OS: We don't need this code right now, it is for other_users and shared folders
 213                                 if (eregi('^\( *\((.*)\) *\)', $data[2], $data2))
 214                                         $on = $data2[1];
 215                                 if (eregi('^\( *\((.*)\) *\)', $data[3], $data2))
 216                                         $sn = $data2[1];
 217                                 unset($data);
 218                                 $ona = explode(')(', $on);
 219                                 while (list($k, $v) = each($ona))
 220                                 {
 221                                         list($_, $n, $_, $d) = explode('"', $v);
 222                                         $on[$n] = $d;
 223                                 }
 224                                 $sna = explode(')(', $sn);
 225                                 while (list($k, $v) = each($sna))
 226                                 {
 227                                         list($_, $n, $_, $d) = explode('"', $v);
 228                                         $sn[$n] = $d;
 229                                 }
 230 */
 231                         }
 232                         $sqimap_delimiter = $pn[0];
 233                 } else {
 234                         fputs ($imap_stream, ". LIST \"INBOX\" \"\"\r\n");
 235                         $read = sqimap_read_data($imap_stream, ".", true, $a, $b);
 236                         $quote_position = strpos ($read[0], "\"");
 237                         $sqimap_delimiter = substr ($read[0], $quote_position+1, 1);
 238                 }
 239         }
 240         return $sqimap_delimiter;
 241 }
 242
 243
 244    /******************************************************************************
 245     **  Gets the number of messages in the current mailbox.
 246     ******************************************************************************/
 247    function sqimap_get_num_messages ($imap_stream, $mailbox) {
 248       fputs ($imap_stream, "a001 EXAMINE \"$mailbox\"\r\n");
 249       $read_ary = sqimap_read_data ($imap_stream, "a001", true, $result, $message);
 250       for ($i = 0; $i < count($read_ary); $i++) {
 251          if (ereg("[^ ]+ +([^ ]+) +EXISTS", $read_ary[$i], $regs)) {
 252             return $regs[1];
 253          }
 254       }
 255       return "BUG!  Couldn't get number of messages in $mailbox!";
 256    }
 257
 258
 259    /******************************************************************************
 260     **  Returns a displayable email address
 261     ******************************************************************************/
 262    function sqimap_find_email ($string) {
 263       /** Luke Ehresman <lehresma@css.tayloru.edu>
 264        ** <lehresma@css.tayloru.edu>
 265        ** lehresma@css.tayloru.edu
 266        **
 267        ** What about
 268        **    lehresma@css.tayloru.edu (Luke Ehresman)
 269        **/
 270
 271       if (ereg("<([^>]+)>", $string, $regs)) {
 272           $string = $regs[1];
 273       }
 274       return trim($string);
 275    }
 276
 277
 278    /******************************************************************************
 279     **  Takes the From: field, and creates a displayable name.
 280     **    Luke Ehresman <lkehresman@yahoo.com>
 281     **           becomes:   Luke Ehresman
 282     **    <lkehresman@yahoo.com>
 283     **           becomes:   lkehresman@yahoo.com
 284     ******************************************************************************/
 285    function sqimap_find_displayable_name ($string) {
 286       $string = " ".trim($string);
 287       $orig_string = $string;
 288       if (strpos($string, "<") && strpos($string, ">")) {
 289          if (strpos($string, "<") == 1) {
 290             $string = sqimap_find_email($string);
 291          } else {
 292             $string = trim($string);
 293             $string = substr($string, 0, strpos($string, "<"));
 294             $string = ereg_replace ("\"", "", $string);
 295          }
 296
 297          if (trim($string) == "") {
 298             $string = sqimap_find_email($orig_string);
 299          }
 300       }
 301       return $string;
 302    }
 303
 304
 305    /******************************************************************************
 306     **  Returns the number of unseen messages in this folder
 307     ******************************************************************************/
 308    function sqimap_unseen_messages ($imap_stream, &$num_unseen, $mailbox) {
 309       //fputs ($imap_stream, "a001 SEARCH UNSEEN NOT DELETED\r\n");
 310       fputs ($imap_stream, "a001 STATUS \"$mailbox\" (UNSEEN)\r\n");
 311       $read_ary = sqimap_read_data ($imap_stream, "a001", true, $result, $message);
 312       ereg("UNSEEN ([0-9]+)", $read_ary[0], $regs);
 313       return $regs[1];
 314    }
 315
 316
 317    /******************************************************************************
 318     **  Saves a message to a given folder -- used for saving sent messages
 319     ******************************************************************************/
 320    function sqimap_append ($imap_stream, $sent_folder, $length) {
 321       fputs ($imap_stream, "a001 APPEND \"$sent_folder\" (\\Seen) \{$length}\r\n");
 322       $tmp = fgets ($imap_stream, 1024);
 323    }
 324
 325    function sqimap_append_done ($imap_stream) {
 326       fputs ($imap_stream, "\r\n");
 327       $tmp = fgets ($imap_stream, 1024);
 328    }
 329 ?>