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('key',        $key,          SQ_COOKIE);
  30 sqgetGlobalVar('username',   $username,     SQ_SESSION);
  31 sqgetGlobalVar('onetimepad', $onetimepad,   SQ_SESSION);
  32 sqgetGlobalVar('mailbox_cache',$mailbox_cache,SQ_SESSION);
  33 sqgetGlobalVar('messages',   $messages,     SQ_SESSION);
  34 sqgetGlobalVar('mailbox',    $mailbox,      SQ_GET);
  35 sqgetGlobalVar('ent_id',     $ent_id,       SQ_GET);
  36 sqgetGlobalVar('absolute_dl',$absolute_dl,  SQ_GET);
  37 if ( sqgetGlobalVar('passed_id', $temp, SQ_GET) ) {
  38     $passed_id = (int) $temp;
  39 }
  40 if (!sqgetGlobalVar('account', $account, SQ_GET) ) {
  41     $account = 0;
  42 }
  43
  44 global $default_charset;
  45 set_my_charset();
  46
  47 /* end globals */
  48
  49 $imapConnection = sqimap_login($username, $key, $imapServerAddress, $imapPort, 0);
  50 $aMailbox = sqm_api_mailbox_select($imapConnection, $account, $mailbox,array(),array());
  51
  52 if (isset($aMailbox['MSG_HEADERS'][$passed_id]['MESSAGE_OBJECT']) &&
  53     is_object($aMailbox['MSG_HEADERS'][$passed_id]['MESSAGE_OBJECT']) ) {
  54     $message = $aMailbox['MSG_HEADERS'][$passed_id]['MESSAGE_OBJECT'];
  55 } else {
  56    $message = sqimap_get_message($imapConnection, $passed_id, $mailbox);
  57    $aMailbox['MSG_HEADERS'][$passed_id]['MESSAGE_OBJECT'] = $message;
  58 }
  59
  60 $subject = $message->rfc822_header->subject;
  61 if ($ent_id) {
  62     // replace message with message part, if message part is requested.
  63     $message = $message->getEntity($ent_id);
  64     $header = $message->header;
  65
  66     if ($message->rfc822_header) {
  67        $subject = $message->rfc822_header->subject;
  68     } else {
  69        $header = $message->header;
  70     }
  71     $type0 = $header->type0;
  72     $type1 = $header->type1;
  73     $encoding = strtolower($header->encoding);
  74 } else {
  75     /* raw message */
  76     $type0 = 'message';
  77     $type1 = 'rfc822';
  78     $encoding = 'US-ASCII';
  79     $header = $message->header;
  80 }
  81
  82 /*
  83  * lets redefine message as this particular entity that we wish to display.
  84  * it should hold only the header for this entity.  We need to fetch the body
  85  * yet before we can display anything.
  86  */
  87
  88 if (isset($override_type0)) {
  89     $type0 = $override_type0;
  90 }
  91 if (isset($override_type1)) {
  92     $type1 = $override_type1;
  93 }
  94 $filename = '';
  95 if (is_object($message->header->disposition)) {
  96     $filename = $header->disposition->getProperty('filename');
  97     if (!$filename) {
  98         $filename = $header->disposition->getProperty('name');
  99     }
 100     if (!$filename) {
 101         $filename = $header->getParameter('name');
 102     }
 103 } else {
 104     $filename = $header->getParameter('name');
 105 }
 106
 107 $filename = decodeHeader($filename,true,false);
 108 $filename = charset_encode($filename,$default_charset,false);
 109
 110 // If name is not set, use subject of email
 111 if (strlen($filename) < 1) {
 112     $filename = decodeHeader($subject, true, true);
 113     $filename = charset_encode($filename,$default_charset,false);
 114     if ($type1 == 'plain' && $type0 == 'text')
 115         $suffix = 'txt';
 116     else if ($type1 == 'richtext' && $type0 == 'text')
 117         $suffix = 'rtf';
 118     else if ($type1 == 'postscript' && $type0 == 'application')
 119         $suffix = 'ps';
 120     else if ($type1 == 'rfc822' && $type0 == 'message')
 121         $suffix = 'msg';
 122     else
 123         $suffix = $type1;
 124
 125     if ($filename == '')
 126         $filename = 'untitled' . strip_tags($ent_id);
 127     $filename = $filename . '.' . $suffix;
 128 }
 129
 130 /**
 131  * Update mailbox_cache and close session in order to prevent
 132  * script locking on larger downloads. SendDownloadHeaders() and
 133  * mime_print_body_lines() don't write information to session.
 134  * mime_print_body_lines() call duration depends on size of
 135  * attachment and script can cause interface lockups, if session
 136  * is not closed.
 137  */
 138 $mailbox_cache[$aMailbox['NAME']] = $aMailbox;
 139 sqsession_register($mailbox_cache,'mailbox_cache');
 140 session_write_close();
 141
 142 /*
 143  * Note:
 144  *    The following sections display the attachment in different
 145  *    ways depending on how they choose.  The first way will download
 146  *    under any circumstance.  This sets the Content-type to be
 147  *    applicatin/octet-stream, which should be interpreted by the
 148  *    browser as "download me".
 149  *      The second method (view) is used for images or other formats
 150  *    that should be able to be handled by the browser.  It will
 151  *    most likely display the attachment inline inside the browser.
 152  *      And finally, the third one will be used by default.  If it
 153  *    is displayable (text or html), it will load them up in a text
 154  *    viewer (built in to SquirrelMail).  Otherwise, it sets the
 155  *    content-type as application/octet-stream
 156  */
 157 if (isset($absolute_dl) && $absolute_dl) {
 158     SendDownloadHeaders($type0, $type1, $filename, 1);
 159 } else {
 160     SendDownloadHeaders($type0, $type1, $filename, 0);
 161 }
 162 /* be aware that any warning caused by download.php will corrupt the
 163  * attachment in case of ERROR reporting = E_ALL and the output is the screen */
 164 mime_print_body_lines ($imapConnection, $passed_id, $ent_id, $encoding);
 165