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 /**
  26  * If a message is viewed from the search page, $aMailbox[$passed_id]['MESSAGE_OBJECT']
  27  * is not initialized, which makes this page error out on line 65 with an
  28  * undefined function.  We need to include some additional files in case the
  29  * object has not been initialized.
  30  *
  31  * TODO: Determine why the object in question is not initialized when coming from
  32  *       a search page and correct.  Once that is done, we can remove these
  33  *       includes.
  34  */
  35 require(SM_PATH . 'functions/imap_messages.php');
  36 require(SM_PATH . 'functions/date.php');
  37
  38 header('Pragma: ');
  39 header('Cache-Control: cache');
  40
  41 /* globals */
  42 sqgetGlobalVar('mailbox_cache',$mailbox_cache,SQ_SESSION);
  43 sqgetGlobalVar('messages',   $messages,     SQ_SESSION);
  44 sqgetGlobalVar('mailbox',    $mailbox,      SQ_GET);
  45 sqgetGlobalVar('ent_id',     $ent_id,       SQ_GET);
  46 sqgetGlobalVar('absolute_dl',$absolute_dl,  SQ_GET);
  47 if ( sqgetGlobalVar('passed_id', $temp, SQ_GET) ) {
  48     $passed_id = (int) $temp;
  49 }
  50 if (!sqgetGlobalVar('account', $account, SQ_GET) ) {
  51     $account = 0;
  52 }
  53
  54 global $default_charset;
  55 set_my_charset();
  56
  57 /* end globals */
  58
  59 $imapConnection = sqimap_login($username, false, $imapServerAddress, $imapPort, 0);
  60 $aMailbox = sqm_api_mailbox_select($imapConnection, $account, $mailbox,array(),array());
  61
  62 if (isset($aMailbox['MSG_HEADERS'][$passed_id]['MESSAGE_OBJECT']) &&
  63     is_object($aMailbox['MSG_HEADERS'][$passed_id]['MESSAGE_OBJECT']) ) {
  64     $message = $aMailbox['MSG_HEADERS'][$passed_id]['MESSAGE_OBJECT'];
  65 } else {
  66     $message = sqimap_get_message($imapConnection, $passed_id, $mailbox);
  67     $aMailbox['MSG_HEADERS'][$passed_id]['MESSAGE_OBJECT'] = $message;
  68 }
  69
  70 $subject = $message->rfc822_header->subject;
  71 if ($ent_id) {
  72     // replace message with message part, if message part is requested.
  73     $message = $message->getEntity($ent_id);
  74     $header = $message->header;
  75
  76     if ($message->rfc822_header) {
  77        $subject = $message->rfc822_header->subject;
  78     } else {
  79        $header = $message->header;
  80     }
  81     $type0 = $header->type0;
  82     $type1 = $header->type1;
  83     $encoding = strtolower($header->encoding);
  84 } else {
  85     /* raw message */
  86     $type0 = 'message';
  87     $type1 = 'rfc822';
  88     $encoding = 'US-ASCII';
  89     $header = $message->header;
  90 }
  91
  92 /*
  93  * lets redefine message as this particular entity that we wish to display.
  94  * it should hold only the header for this entity.  We need to fetch the body
  95  * yet before we can display anything.
  96  */
  97
  98 if (isset($override_type0)) {
  99     $type0 = $override_type0;
 100 }
 101 if (isset($override_type1)) {
 102     $type1 = $override_type1;
 103 }
 104 $filename = '';
 105 if (is_object($message->header->disposition)) {
 106     $filename = $header->disposition->getProperty('filename');
 107     if (!$filename) {
 108         $filename = $header->disposition->getProperty('name');
 109     }
 110     if (!$filename) {
 111         $filename = $header->getParameter('name');
 112     }
 113 } else {
 114     $filename = $header->getParameter('name');
 115 }
 116
 117 $filename = decodeHeader($filename,true,false);
 118 $filename = charset_encode($filename,$default_charset,false);
 119
 120 // If name is not set, use subject of email
 121 if (strlen($filename) < 1) {
 122     $filename = decodeHeader($subject, true, true);
 123     $filename = charset_encode($filename,$default_charset,false);
 124     if ($type1 == 'plain' && $type0 == 'text')
 125         $suffix = 'txt';
 126     else if ($type1 == 'richtext' && $type0 == 'text')
 127         $suffix = 'rtf';
 128     else if ($type1 == 'postscript' && $type0 == 'application')
 129         $suffix = 'ps';
 130     else if ($type1 == 'rfc822' && $type0 == 'message')
 131         $suffix = 'msg';
 132     else
 133         $suffix = $type1;
 134
 135     if ($filename == '')
 136         $filename = 'untitled' . strip_tags($ent_id);
 137     $filename = $filename . '.' . $suffix;
 138 }
 139
 140 /**
 141  * Update mailbox_cache and close session in order to prevent
 142  * script locking on larger downloads. SendDownloadHeaders() and
 143  * mime_print_body_lines() don't write information to session.
 144  * mime_print_body_lines() call duration depends on size of
 145  * attachment and script can cause interface lockups, if session
 146  * is not closed.
 147  */
 148 $mailbox_cache[$aMailbox['NAME']] = $aMailbox;
 149 sqsession_register($mailbox_cache,'mailbox_cache');
 150 session_write_close();
 151
 152 /*
 153  * Note:
 154  *    The following sections display the attachment in different
 155  *    ways depending on how they choose.  The first way will download
 156  *    under any circumstance.  This sets the Content-type to be
 157  *    applicatin/octet-stream, which should be interpreted by the
 158  *    browser as "download me".
 159  *      The second method (view) is used for images or other formats
 160  *    that should be able to be handled by the browser.  It will
 161  *    most likely display the attachment inline inside the browser.
 162  *      And finally, the third one will be used by default.  If it
 163  *    is displayable (text or html), it will load them up in a text
 164  *    viewer (built in to SquirrelMail).  Otherwise, it sets the
 165  *    content-type as application/octet-stream
 166  */
 167 if (isset($absolute_dl) && $absolute_dl) {
 168     SendDownloadHeaders($type0, $type1, $filename, 1);
 169 } else {
 170     SendDownloadHeaders($type0, $type1, $filename, 0);
 171 }
 172 /* be aware that any warning caused by download.php will corrupt the
 173  * attachment in case of ERROR reporting = E_ALL and the output is the screen */
 174 mime_print_body_lines ($imapConnection, $passed_id, $ent_id, $encoding);
 175