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; 1999-2007 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 /** This is the download page */
  16 define('PAGE_NAME', 'download');
  17
  18 /**
  19  * Include the SquirrelMail initialization file.
  20  */
  21 require('../include/init.php');
  22
  23 /* SquirrelMail required files. */
  24 require(SM_PATH . 'functions/imap_general.php');
  25 require(SM_PATH . 'functions/mailbox_display.php');
  26 require(SM_PATH . 'functions/mime.php');
  27
  28 /**
  29  * If a message is viewed from the search page, $aMailbox[$passed_id]['MESSAGE_OBJECT']
  30  * is not initialized, which makes this page error out on line 65 with an
  31  * undefined function.  We need to include some additional files in case the
  32  * object has not been initialized.
  33  *
  34  * TODO: Determine why the object in question is not initialized when coming from
  35  *       a search page and correct.  Once that is done, we can remove these
  36  *       includes.
  37  */
  38 require(SM_PATH . 'functions/imap_messages.php');
  39 require(SM_PATH . 'functions/date.php');
  40
  41 header('Pragma: ');
  42 header('Cache-Control: cache');
  43
  44 /* globals */
  45 sqgetGlobalVar('mailbox_cache',$mailbox_cache,SQ_SESSION);
  46 sqgetGlobalVar('messages',   $messages,     SQ_SESSION);
  47 sqgetGlobalVar('mailbox',    $mailbox,      SQ_GET);
  48 sqgetGlobalVar('ent_id',     $ent_id,       SQ_GET);
  49 sqgetGlobalVar('absolute_dl',$absolute_dl,  SQ_GET);
  50 if ( sqgetGlobalVar('passed_id', $temp, SQ_GET) ) {
  51     $passed_id = (int) $temp;
  52 }
  53 if (!sqgetGlobalVar('account', $account, SQ_GET) ) {
  54     $account = 0;
  55 }
  56
  57 global $default_charset;
  58 set_my_charset();
  59
  60 /* end globals */
  61
  62 $imapConnection = sqimap_login($username, false, $imapServerAddress, $imapPort, 0);
  63 $aMailbox = sqm_api_mailbox_select($imapConnection, $account, $mailbox,array(),array());
  64
  65 if (isset($aMailbox['MSG_HEADERS'][$passed_id]['MESSAGE_OBJECT']) &&
  66     is_object($aMailbox['MSG_HEADERS'][$passed_id]['MESSAGE_OBJECT']) ) {
  67     $message = $aMailbox['MSG_HEADERS'][$passed_id]['MESSAGE_OBJECT'];
  68 } else {
  69     $message = sqimap_get_message($imapConnection, $passed_id, $mailbox);
  70     $aMailbox['MSG_HEADERS'][$passed_id]['MESSAGE_OBJECT'] = $message;
  71 }
  72
  73 $subject = $message->rfc822_header->subject;
  74 if ($ent_id) {
  75     // replace message with message part, if message part is requested.
  76     $message = $message->getEntity($ent_id);
  77     $header = $message->header;
  78
  79     if ($message->rfc822_header) {
  80        $subject = $message->rfc822_header->subject;
  81     } else {
  82        $header = $message->header;
  83     }
  84     $type0 = $header->type0;
  85     $type1 = $header->type1;
  86     $encoding = strtolower($header->encoding);
  87 } else {
  88     /* raw message */
  89     $type0 = 'message';
  90     $type1 = 'rfc822';
  91     $encoding = 'US-ASCII';
  92     $header = $message->header;
  93 }
  94
  95 /*
  96  * lets redefine message as this particular entity that we wish to display.
  97  * it should hold only the header for this entity.  We need to fetch the body
  98  * yet before we can display anything.
  99  */
 100
 101 if (isset($override_type0)) {
 102     $type0 = $override_type0;
 103 }
 104 if (isset($override_type1)) {
 105     $type1 = $override_type1;
 106 }
 107 $filename = '';
 108 if (is_object($message->header->disposition)) {
 109     $filename = $header->disposition->getProperty('filename');
 110     if (!$filename) {
 111         $filename = $header->disposition->getProperty('name');
 112     }
 113     if (!$filename) {
 114         $filename = $header->getParameter('name');
 115     }
 116 } else {
 117     $filename = $header->getParameter('name');
 118 }
 119
 120 $filename = decodeHeader($filename,true,false);
 121 $filename = charset_encode($filename,$default_charset,false);
 122
 123 // If name is not set, use subject of email
 124 if (strlen($filename) < 1) {
 125     $filename = decodeHeader($subject, true, true);
 126     $filename = charset_encode($filename,$default_charset,false);
 127     if ($type1 == 'plain' && $type0 == 'text')
 128         $suffix = 'txt';
 129     else if ($type1 == 'richtext' && $type0 == 'text')
 130         $suffix = 'rtf';
 131     else if ($type1 == 'postscript' && $type0 == 'application')
 132         $suffix = 'ps';
 133     else if ($type1 == 'rfc822' && $type0 == 'message')
 134         $suffix = 'eml';
 135     else
 136         $suffix = $type1;
 137
 138     if ($filename == '')
 139         $filename = 'untitled' . strip_tags($ent_id);
 140     $filename = $filename . '.' . $suffix;
 141 }
 142
 143 /**
 144  * Update mailbox_cache and close session in order to prevent
 145  * script locking on larger downloads. SendDownloadHeaders() and
 146  * mime_print_body_lines() don't write information to session.
 147  * mime_print_body_lines() call duration depends on size of
 148  * attachment and script can cause interface lockups, if session
 149  * is not closed.
 150  */
 151 $mailbox_cache[$aMailbox['NAME']] = $aMailbox;
 152 sqsession_register($mailbox_cache,'mailbox_cache');
 153 session_write_close();
 154
 155 /*
 156  * Note:
 157  *    The following sections display the attachment in different
 158  *    ways depending on how they choose.  The first way will download
 159  *    under any circumstance.  This sets the Content-type to be
 160  *    applicatin/octet-stream, which should be interpreted by the
 161  *    browser as "download me".
 162  *      The second method (view) is used for images or other formats
 163  *    that should be able to be handled by the browser.  It will
 164  *    most likely display the attachment inline inside the browser.
 165  *      And finally, the third one will be used by default.  If it
 166  *    is displayable (text or html), it will load them up in a text
 167  *    viewer (built in to SquirrelMail).  Otherwise, it sets the
 168  *    content-type as application/octet-stream
 169  */
 170 if (isset($absolute_dl) && $absolute_dl) {
 171     SendDownloadHeaders($type0, $type1, $filename, 1);
 172 } else {
 173     SendDownloadHeaders($type0, $type1, $filename, 0);
 174 }
 175 /* be aware that any warning caused by download.php will corrupt the
 176  * attachment in case of ERROR reporting = E_ALL and the output is the screen */
 177 mime_print_body_lines ($imapConnection, $passed_id, $ent_id, $encoding);
 178