functions/imap_general.php

   1 <?php
   2
   3 /**
   4  * imap_general.php
   5  *
   6  * Copyright (c) 1999-2002 The SquirrelMail Project Team
   7  * Licensed under the GNU GPL. For full terms see the file COPYING.
   8  *
   9  * This implements all functions that do general imap functions.
  10  *
  11  * $Id$
  12  */
  13
  14 require_once('../functions/page_header.php');
  15
  16 global $sqimap_session_id;
  17 $sqimap_session_id = 1;
  18
  19 /* Sets an unique session id in order to avoid simultanous sessions crash. */
  20 function sqimap_session_id($unique_id = false) {
  21     global $data_dir, $username, $sqimap_session_id;
  22     if (!$unique_id) {
  23         return( sprintf("A%03d", $sqimap_session_id++) );
  24     } else {
  25         return( sprintf("A%03d", $sqimap_session_id++) . ' UID' );
  26     }
  27 }
  28
  29 /*
  30  * Both send a command and accept the result from the command.
  31  * This is to allow proper session number handling.
  32  */
  33 function sqimap_run_command_list ($imap_stream, $query, $handle_errors, &$response, &$message, $unique_id = false) {
  34     $sid = sqimap_session_id($unique_id);
  35     fputs ($imap_stream, $sid . ' ' . $query . "\r\n");
  36     $read = sqimap_read_data_list ($imap_stream, $sid, $handle_errors, $response, $message, $query );
  37     return $read;
  38 }
  39
  40 function sqimap_run_command ($imap_stream, $query, $handle_errors, &$response, &$message, $unique_id = false) {
  41     $sid = sqimap_session_id($unique_id);
  42     fputs ($imap_stream, $sid . ' ' . $query . "\r\n");
  43     $read = sqimap_read_data ($imap_stream, $sid, $handle_errors, $response, $message, $query);
  44     return $read;
  45 }
  46
  47
  48 /*
  49  * custom fgets function. gets a line from IMAP
  50  * no matter how big it may be
  51  */
  52
  53 function sqimap_fgets($imap_stream) {
  54     $read = '';
  55     $buffer = 4096;
  56     $results = '';
  57     while (strpos($read, "\n") === false) {
  58         if (!($read = fgets($imap_stream, $buffer))) {
  59             break;
  60         }
  61         $results .= $read;
  62     }
  63     return $results;
  64 }
  65
  66 /*
  67  * Reads the output from the IMAP stream.  If handle_errors is set to true,
  68  * this will also handle all errors that are received.  If it is not set,
  69  * the errors will be sent back through $response and $message
  70  */
  71
  72 function sqimap_read_data_list ($imap_stream, $pre, $handle_errors, &$response, &$message, $query = '') {
  73     global $color, $squirrelmail_language;
  74     $read = '';
  75     $pre_a = explode(' ',trim($pre));
  76     $pre = $pre_a[0];
  77     $resultlist = array();
  78     $data = array();
  79     $read = sqimap_fgets($imap_stream);
  80     while (1) {
  81         switch (true) {
  82             case preg_match("/^$pre (OK|BAD|NO)(.*)$/", $read, $regs):
  83             case preg_match('/^\* (BYE \[ALERT\])(.*)$/', $read, $regs):
  84                 $response = $regs[1];
  85                 $message = trim($regs[2]);
  86                 break 2;
  87             case preg_match("/^\* (OK \[PARSE\])(.*)$/", $read):
  88                 $read = sqimap_fgets($imap_stream);
  89                 break 1;
  90             case preg_match('/^\* [0-9]+ FETCH.*/', $read):
  91                 $fetch_data = array();
  92                 $fetch_data[] = $read;
  93                 $read = sqimap_fgets($imap_stream);
  94                 while (!preg_match('/^\* [0-9]+ FETCH.*/', $read) &&
  95                        !preg_match("/^$pre (OK|BAD|NO)(.*)$/", $read)) {
  96                     $fetch_data[] = $read;
  97                     $read = sqimap_fgets($imap_stream);
  98                 }
  99                 $resultlist[] = $fetch_data;
 100                 break 1;
 101             default:
 102                 $data[] = $read;
 103                 $read = sqimap_fgets($imap_stream);
 104                 break 1;
 105         }
 106     }
 107     if (!empty($data)) {
 108         $resultlist[] = $data;
 109     }
 110     elseif (empty($resultlist)) {
 111         $resultlist[] = array();
 112     }
 113     if ($handle_errors == false) {
 114         return( $resultlist );
 115     }
 116     elseif ($response == 'NO') {
 117     /* ignore this error from M$ exchange, it is not fatal (aka bug) */
 118         if (strstr($message, 'command resulted in') === false) {
 119             set_up_language($squirrelmail_language);
 120             echo "<br><b><font color=$color[2]>\n" .
 121                 _("ERROR : Could not complete request.") .
 122                 "</b><br>\n" .
 123                 _("Query:") .
 124                 $query . '<br>' .
 125                 _("Reason Given: ") .
 126                 $message . "</font><br>\n";
 127             exit;
 128         }
 129     }
 130     elseif ($response == 'BAD') {
 131         set_up_language($squirrelmail_language);
 132         echo "<br><b><font color=$color[2]>\n" .
 133             _("ERROR : Bad or malformed request.") .
 134             "</b><br>\n" .
 135             _("Query:") .
 136             $query . '<br>' .
 137             _("Server responded: ") .
 138             $message . "</font><br>\n";
 139         exit;
 140     }
 141     else {
 142         return $resultlist;
 143     }
 144 }
 145
 146 function sqimap_read_data ($imap_stream, $pre, $handle_errors, &$response, &$message, $query = '') {
 147     $res = sqimap_read_data_list($imap_stream, $pre, $handle_errors, $response, $message, $query);
 148     return $res[0];
 149 }
 150
 151 /*
 152  * Logs the user into the imap server.  If $hide is set, no error messages
 153  * will be displayed.  This function returns the imap connection handle.
 154  */
 155 function sqimap_login ($username, $password, $imap_server_address, $imap_port, $hide) {
 156     global $color, $squirrelmail_language, $HTTP_ACCEPT_LANGUAGE, $onetimepad;
 157
 158     $imap_stream = fsockopen ( $imap_server_address, $imap_port, $error_number, $error_string, 15);
 159     if ( !$imap_stream ) {
 160         return false;
 161     }
 162     $server_info = fgets ($imap_stream, 1024);
 163
 164     /* Decrypt the password */
 165     $password = OneTimePadDecrypt($password, $onetimepad);
 166
 167     /* Do some error correction */
 168     if (!$imap_stream) {
 169         if (!$hide) {
 170             set_up_language($squirrelmail_language, true);
 171             printf (_("Error connecting to IMAP server: %s.")."<br>\r\n", $imap_server_address);
 172             echo "$error_number : $error_string<br>\r\n";
 173         }
 174         exit;
 175     }
 176
 177     $query = 'LOGIN "' . quoteIMAP($username) .  '" "' . quoteIMAP($password) . '"';
 178     $read = sqimap_run_command ($imap_stream, $query, false, $response, $message);
 179
 180     /* If the connection was not successful, lets see why */
 181     if ($response != 'OK') {
 182         if (!$hide) {
 183             if ($response != 'NO') {
 184                 /* "BAD" and anything else gets reported here. */
 185                 set_up_language($squirrelmail_language, true);
 186                 if ($response == 'BAD') {
 187                    printf (_("Bad request: %s")."<br>\r\n", $message);
 188                 } else {
 189                    printf (_("Unknown error: %s") . "<br>\n", $message);
 190                 }
 191                 echo '<br>' . _("Read data:") . "<br>\n";
 192                 if (is_array($read)) {
 193                     foreach ($read as $line) {
 194                         echo htmlspecialchars($line) . "<br>\n";
 195                     }
 196                 }
 197                 exit;
 198             } else {
 199                 /*
 200                  * If the user does not log in with the correct
 201                  * username and password it is not possible to get the
 202                  * correct locale from the user's preferences.
 203                  * Therefore, apply the same hack as on the login
 204                  * screen.
 205                  *
 206                  * $squirrelmail_language is set by a cookie when
 207                  * the user selects language and logs out
 208                  */
 209
 210                 set_up_language($squirrelmail_language, true);
 211                 include_once( '../functions/display_messages.php' );
 212                 logout_error( _("Unknown user or password incorrect.") );
 213                 session_destroy();
 214                 exit;
 215             }
 216         } else {
 217             exit;
 218         }
 219     }
 220     return $imap_stream;
 221 }
 222
 223 /* Simply logs out the IMAP session */
 224 function sqimap_logout ($imap_stream) {
 225     /* Logout is not valid until the server returns 'BYE' */
 226     sqimap_run_command($imap_stream, 'LOGOUT', false, $response, $message);
 227 }
 228
 229 function sqimap_capability($imap_stream, $capability='') {
 230     global $sqimap_capabilities;
 231     if (!is_array($sqimap_capabilities)) {
 232         $read = sqimap_run_command($imap_stream, 'CAPABILITY', true, $a, $b);
 233
 234         $c = explode(' ', $read[0]);
 235         for ($i=2; $i < count($c); $i++) {
 236             $cap_list = explode('=', $c[$i]);
 237             if (isset($cap_list[1])) {
 238                 $sqimap_capabilities[$cap_list[0]] = $cap_list[1];
 239             } else {
 240                 $sqimap_capabilities[$cap_list[0]] = TRUE;
 241             }
 242         }
 243     }
 244     if ($capability) {
 245         if (isset($sqimap_capabilities[$capability])) {
 246             return $sqimap_capabilities[$capability];
 247         } else {
 248             return false;
 249         }
 250     }
 251     return $sqimap_capabilities;
 252 }
 253
 254 /* Returns the delimeter between mailboxes: INBOX/Test, or INBOX.Test */
 255 function sqimap_get_delimiter ($imap_stream = false) {
 256     global $sqimap_delimiter, $optional_delimiter;
 257
 258     /* Use configured delimiter if set */
 259     if((!empty($optional_delimiter)) && $optional_delimiter != 'detect') {
 260         return $optional_delimiter;
 261     }
 262
 263     /* Do some caching here */
 264     if (!$sqimap_delimiter) {
 265         if (sqimap_capability($imap_stream, 'NAMESPACE')) {
 266             /*
 267              * According to something that I can't find, this is supposed to work on all systems
 268              * OS: This won't work in Courier IMAP.
 269              * OS: According to rfc2342 response from NAMESPACE command is:
 270              * OS: * NAMESPACE (PERSONAL NAMESPACES) (OTHER_USERS NAMESPACE) (SHARED NAMESPACES)
 271              * OS: We want to lookup all personal NAMESPACES...
 272              */
 273             $read = sqimap_run_command($imap_stream, 'NAMESPACE', true, $a, $b);
 274             if (eregi('\\* NAMESPACE +(\\( *\\(.+\\) *\\)|NIL) +(\\( *\\(.+\\) *\\)|NIL) +(\\( *\\(.+\\) *\\)|NIL)', $read[0], $data)) {
 275                 if (eregi('^\\( *\\((.*)\\) *\\)', $data[1], $data2)) {
 276                     $pn = $data2[1];
 277                 }
 278                 $pna = explode(')(', $pn);
 279                 while (list($k, $v) = each($pna)) {
 280                     $lst = explode('"', $v);
 281                     if (isset($lst[3])) {
 282                         $pn[$lst[1]] = $lst[3];
 283                     } else {
 284                         $pn[$lst[1]] = '';
 285                     }
 286                 }
 287             }
 288             $sqimap_delimiter = $pn[0];
 289         } else {
 290             fputs ($imap_stream, ". LIST \"INBOX\" \"\"\r\n");
 291             $read = sqimap_read_data($imap_stream, '.', true, $a, $b);
 292             $quote_position = strpos ($read[0], '"');
 293             $sqimap_delimiter = substr ($read[0], $quote_position+1, 1);
 294         }
 295     }
 296     return $sqimap_delimiter;
 297 }
 298
 299
 300 /* Gets the number of messages in the current mailbox. */
 301 function sqimap_get_num_messages ($imap_stream, $mailbox) {
 302     $read_ary = sqimap_run_command ($imap_stream, "EXAMINE \"$mailbox\"", true, $result, $message);
 303     for ($i = 0; $i < count($read_ary); $i++) {
 304         if (ereg("[^ ]+ +([^ ]+) +EXISTS", $read_ary[$i], $regs)) {
 305             return $regs[1];
 306         }
 307     }
 308     return "BUG! Couldn't get number of messages in $mailbox!";
 309 }
 310
 311
 312 /* Returns a displayable email address.
 313  *     Luke Ehresman <lehresma@css.tayloru.edu>
 314  *     "Luke Ehresman" <lehresma@css.tayloru.edu>
 315  *     <lehresma@css.tayloru.edu>
 316  *     lehresma@css.tayloru.edu (Luke Ehresman)
 317  *     lehresma@css.tayloru.edu
 318  * becomes: lehresma@css.tayloru.edu
 319  */
 320 function sqimap_find_email ($string) {
 321     if (ereg("<([^>]+)>", $string, $regs)) {
 322         $string = $regs[1];
 323     } else if (ereg("([^ ]+@[^ ]+)", $string, $regs)) {
 324         $string = $regs[1];
 325     }
 326     return trim($string);
 327 }
 328
 329
 330 /*
 331  * Takes the From: field and creates a displayable name.
 332  *     Luke Ehresman   <lkehresman@yahoo.com>
 333  *     "Luke Ehresman" <lkehresman@yahoo.com>
 334  *     lkehresman@yahoo.com (Luke Ehresman)
 335  * becomes: Luke Ehresman
 336  *     <lkehresman@yahoo.com>
 337  * becomes: lkehresman@yahoo.com
 338  */
 339 function sqimap_find_displayable_name ($string) {
 340     $string = trim($string);
 341
 342     if ( ereg('^(.+)<.*>', $string, $regs) ) {
 343         $orig_string = $string;
 344         $string = str_replace ('"', '', $regs[1] );
 345         if (trim($string) == '') {
 346              $string = sqimap_find_email($orig_string);
 347         }
 348         if( $string == '' || $string == ' ' ){
 349             $string = '&nbsp';
 350         }
 351     }
 352     elseif ( ereg('\((.*)\)', $string, $regs) ) {
 353         if( ( $regs[1] == '' ) || ( $regs[1] == ' ' ) ){
 354             if ( ereg('^(.+) \(', $string, $regs) ) {
 355                $string = ereg_replace( ' \(\)$', '', $string );
 356             } else {
 357                $string = '&nbsp';
 358             }
 359         } else {
 360             $string = $regs[1];
 361         }
 362     }
 363     else {
 364         $string = str_replace ('"', '', sqimap_find_email($string));
 365     }
 366
 367     return trim($string);
 368 }
 369
 370 /*
 371  * Returns the number of unseen messages in this folder
 372  */
 373 function sqimap_unseen_messages ($imap_stream, $mailbox) {
 374     $read_ary = sqimap_run_command ($imap_stream, "STATUS \"$mailbox\" (UNSEEN)", true, $result, $message);
 375     $i = 0;
 376     while (isset($read_ary[$i])) {
 377         if (ereg("UNSEEN ([0-9]+)", $read_ary[$i], $regs)) {
 378             break;
 379         }
 380         $i++;
 381     }
 382     return $regs[1];
 383 }
 384
 385
 386 /*
 387  *  Saves a message to a given folder -- used for saving sent messages
 388  */
 389 function sqimap_append ($imap_stream, $sent_folder, $length) {
 390     fputs ($imap_stream, sqimap_session_id() . " APPEND \"$sent_folder\" (\\Seen) \{$length}\r\n");
 391     $tmp = fgets ($imap_stream, 1024);
 392 }
 393
 394 function sqimap_append_done ($imap_stream) {
 395     fputs ($imap_stream, "\r\n");
 396     $tmp = fgets ($imap_stream, 1024);
 397 }
 398
 399 ?>