src/download.php

   1 <?php
   2
   3 /**
   4  * download.php
   5  *
   6  * Handles attachment downloads to the users computer.
   7  * Also allows displaying of attachments when possible.
   8  *
   9  * @copyright &copy; 1999-2006 The SquirrelMail Project Team
  10  * @license http://opensource.org/licenses/gpl-license.php GNU Public License
  11  * @version $Id$
  12  * @package squirrelmail
  13  */
  14
  15 /**
  16  * Include the SquirrelMail initialization file.
  17  */
  18 require('../include/init.php');
  19
  20 /* SquirrelMail required files. */
  21 require(SM_PATH . 'functions/imap_general.php');
  22 require(SM_PATH . 'functions/mailbox_display.php');
  23 require(SM_PATH . 'functions/mime.php');
  24
  25 header('Pragma: ');
  26 header('Cache-Control: cache');
  27
  28 /* globals */
  29 sqgetGlobalVar('mailbox_cache',$mailbox_cache,SQ_SESSION);
  30 sqgetGlobalVar('messages',   $messages,     SQ_SESSION);
  31 sqgetGlobalVar('mailbox',    $mailbox,      SQ_GET);
  32 sqgetGlobalVar('ent_id',     $ent_id,       SQ_GET);
  33 sqgetGlobalVar('absolute_dl',$absolute_dl,  SQ_GET);
  34 if ( sqgetGlobalVar('passed_id', $temp, SQ_GET) ) {
  35     $passed_id = (int) $temp;
  36 }
  37 if (!sqgetGlobalVar('account', $account, SQ_GET) ) {
  38     $account = 0;
  39 }
  40
  41 global $default_charset;
  42 set_my_charset();
  43
  44 /* end globals */
  45
  46 $imapConnection = sqimap_login($username, false, $imapServerAddress, $imapPort, 0);
  47 $aMailbox = sqm_api_mailbox_select($imapConnection, $account, $mailbox,array(),array());
  48
  49 if (isset($aMailbox['MSG_HEADERS'][$passed_id]['MESSAGE_OBJECT']) &&
  50     is_object($aMailbox['MSG_HEADERS'][$passed_id]['MESSAGE_OBJECT']) ) {
  51     $message = $aMailbox['MSG_HEADERS'][$passed_id]['MESSAGE_OBJECT'];
  52 } else {
  53    $message = sqimap_get_message($imapConnection, $passed_id, $mailbox);
  54    $aMailbox['MSG_HEADERS'][$passed_id]['MESSAGE_OBJECT'] = $message;
  55 }
  56
  57 $subject = $message->rfc822_header->subject;
  58 if ($ent_id) {
  59     // replace message with message part, if message part is requested.
  60     $message = $message->getEntity($ent_id);
  61     $header = $message->header;
  62
  63     if ($message->rfc822_header) {
  64        $subject = $message->rfc822_header->subject;
  65     } else {
  66        $header = $message->header;
  67     }
  68     $type0 = $header->type0;
  69     $type1 = $header->type1;
  70     $encoding = strtolower($header->encoding);
  71 } else {
  72     /* raw message */
  73     $type0 = 'message';
  74     $type1 = 'rfc822';
  75     $encoding = 'US-ASCII';
  76     $header = $message->header;
  77 }
  78
  79 /*
  80  * lets redefine message as this particular entity that we wish to display.
  81  * it should hold only the header for this entity.  We need to fetch the body
  82  * yet before we can display anything.
  83  */
  84
  85 if (isset($override_type0)) {
  86     $type0 = $override_type0;
  87 }
  88 if (isset($override_type1)) {
  89     $type1 = $override_type1;
  90 }
  91 $filename = '';
  92 if (is_object($message->header->disposition)) {
  93     $filename = $header->disposition->getProperty('filename');
  94     if (!$filename) {
  95         $filename = $header->disposition->getProperty('name');
  96     }
  97     if (!$filename) {
  98         $filename = $header->getParameter('name');
  99     }
 100 } else {
 101     $filename = $header->getParameter('name');
 102 }
 103
 104 $filename = decodeHeader($filename,true,false);
 105 $filename = charset_encode($filename,$default_charset,false);
 106
 107 // If name is not set, use subject of email
 108 if (strlen($filename) < 1) {
 109     $filename = decodeHeader($subject, true, true);
 110     $filename = charset_encode($filename,$default_charset,false);
 111     if ($type1 == 'plain' && $type0 == 'text')
 112         $suffix = 'txt';
 113     else if ($type1 == 'richtext' && $type0 == 'text')
 114         $suffix = 'rtf';
 115     else if ($type1 == 'postscript' && $type0 == 'application')
 116         $suffix = 'ps';
 117     else if ($type1 == 'rfc822' && $type0 == 'message')
 118         $suffix = 'msg';
 119     else
 120         $suffix = $type1;
 121
 122     if ($filename == '')
 123         $filename = 'untitled' . strip_tags($ent_id);
 124     $filename = $filename . '.' . $suffix;
 125 }
 126
 127 /**
 128  * Update mailbox_cache and close session in order to prevent
 129  * script locking on larger downloads. SendDownloadHeaders() and
 130  * mime_print_body_lines() don't write information to session.
 131  * mime_print_body_lines() call duration depends on size of
 132  * attachment and script can cause interface lockups, if session
 133  * is not closed.
 134  */
 135 $mailbox_cache[$aMailbox['NAME']] = $aMailbox;
 136 sqsession_register($mailbox_cache,'mailbox_cache');
 137 session_write_close();
 138
 139 /*
 140  * Note:
 141  *    The following sections display the attachment in different
 142  *    ways depending on how they choose.  The first way will download
 143  *    under any circumstance.  This sets the Content-type to be
 144  *    applicatin/octet-stream, which should be interpreted by the
 145  *    browser as "download me".
 146  *      The second method (view) is used for images or other formats
 147  *    that should be able to be handled by the browser.  It will
 148  *    most likely display the attachment inline inside the browser.
 149  *      And finally, the third one will be used by default.  If it
 150  *    is displayable (text or html), it will load them up in a text
 151  *    viewer (built in to SquirrelMail).  Otherwise, it sets the
 152  *    content-type as application/octet-stream
 153  */
 154 if (isset($absolute_dl) && $absolute_dl) {
 155     SendDownloadHeaders($type0, $type1, $filename, 1);
 156 } else {
 157     SendDownloadHeaders($type0, $type1, $filename, 0);
 158 }
 159 /* be aware that any warning caused by download.php will corrupt the
 160  * attachment in case of ERROR reporting = E_ALL and the output is the screen */
 161 mime_print_body_lines ($imapConnection, $passed_id, $ent_id, $encoding);
 162