src/download.php

   1 <?php
   2
   3 /**
   4  * download.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  * Handles attachment downloads to the users computer.
  10  * Also allows displaying of attachments when possible.
  11  *
  12  * $Id$
  13  */
  14
  15 /* Path for SquirrelMail required files. */
  16 define('SM_PATH','../');
  17
  18 /* SquirrelMail required files. */
  19 require_once(SM_PATH . 'include/validate.php');
  20 require_once(SM_PATH . 'functions/imap.php');
  21 require_once(SM_PATH . 'functions/mime.php');
  22
  23 header('Pragma: ');
  24 header('Cache-Control: cache');
  25
  26 /* globals */
  27
  28 $key = $_COOKIE['key'];
  29 $username = $_SESSION['username'];
  30 $onetimepad = $_SESSION['onetimepad'];
  31 $mailbox = $_GET['mailbox'];
  32 $passed_id = $_GET['passed_id'];
  33 $ent_id = $_GET['ent_id'];
  34 $messages = $_SESSION['messages'];
  35 if (isset($_GET['passed_ent_id'])) {
  36    $passed_ent_id = $_GET['passed_ent_id'];
  37 } else {
  38    $passed_ent_id = '';
  39 }
  40
  41 if (isset($_GET['absolute_dl'])) {
  42    $absolute_dl = $_GET['absolute_dl'];
  43 }
  44
  45 /* end globals */
  46 $mailbox = decodeHeader($mailbox);
  47
  48 global $uid_support;
  49
  50 $imapConnection = sqimap_login($username, $key, $imapServerAddress, $imapPort, 0);
  51 $mbx_response =  sqimap_mailbox_select($imapConnection, $mailbox);
  52
  53 $message = &$messages[$mbx_response['UIDVALIDITY']]["$passed_id"];
  54 if (!is_object($message)) {
  55     $message = sqimap_get_message($imapConnection,$passed_id, $mailbox);
  56 }
  57 $subject = $message->rfc822_header->subject;
  58 $message = &$message->getEntity($ent_id);
  59 $header = $message->header;
  60 if ($message->rfc822_header) {
  61    $subject = $message->rfc822_header->subject;
  62    $charset = $header->content_type->properties['charset'];
  63 } else {
  64    $header = $message->header;
  65    $charset = $header->getParameter('charset');
  66 }
  67 $type0 = $header->type0;
  68 $type1 = $header->type1;
  69 $encoding = strtolower($header->encoding);
  70
  71 /*
  72  * lets redefine message as this particular entity that we wish to display.
  73  * it should hold only the header for this entity.  We need to fetch the body
  74  * yet before we can display anything.
  75  */
  76
  77 if (isset($override_type0)) {
  78     $type0 = $override_type0;
  79 }
  80 if (isset($override_type1)) {
  81     $type1 = $override_type1;
  82 }
  83 $filename = '';
  84 if (is_object($message->header->disposition)) {
  85     $filename = decodeHeader($header->disposition->getProperty('filename'));
  86     if (!$filename) {
  87         $filename = decodeHeader($header->disposition->getProperty('name'));
  88     }
  89 }
  90 if (strlen($filename) < 1) {
  91     if ($type1 == 'plain' && $type0 == 'text') {
  92         $suffix = 'txt';
  93         $filename = $subject . '.txt';
  94     } else if ($type1 == 'richtext' && $type0 == 'text') {
  95         $suffix = 'rtf';
  96         $filename = $subject . '.rtf';
  97     } else if ($type1 == 'postscript' && $type0 == 'application') {
  98         $suffix = 'ps';
  99         $filename = $subject . '.ps';
 100     } else if ($type1 == 'rfc822' && $type0 == 'message') {
 101         $suffix = 'eml';
 102         $filename = $subject . '.msg';
 103     } else {
 104         $suffix = $type1;
 105     }
 106
 107     if (strlen($filename) < 1) {
 108        $filename = "untitled$ent_id.$suffix";
 109     } else {
 110        $filename = "$filename.$suffix";
 111     }
 112 }
 113
 114 /*
 115  * Note:
 116  *    The following sections display the attachment in different
 117  *    ways depending on how they choose.  The first way will download
 118  *    under any circumstance.  This sets the Content-type to be
 119  *    applicatin/octet-stream, which should be interpreted by the
 120  *    browser as "download me".
 121  *      The second method (view) is used for images or other formats
 122  *    that should be able to be handled by the browser.  It will
 123  *    most likely display the attachment inline inside the browser.
 124  *      And finally, the third one will be used by default.  If it
 125  *    is displayable (text or html), it will load them up in a text
 126  *    viewer (built in to squirrelmail).  Otherwise, it sets the
 127  *    content-type as application/octet-stream
 128  */
 129 if (isset($absolute_dl) && $absolute_dl) {
 130     DumpHeaders($type0, $type1, $filename, 1);
 131 } else {
 132     DumpHeaders($type0, $type1, $filename, 0);
 133 }
 134 /* be aware that any warning caused by download.php will corrupt the
 135  * attachment in case of ERROR reporting = E_ALL and the output is the screen */
 136 mime_print_body_lines ($imapConnection, $passed_id, $ent_id, $encoding);
 137
 138 /*
 139  * This function is verified to work with Netscape and the *very latest*
 140  * version of IE.  I don't know if it works with Opera, but it should now.
 141  */
 142 function DumpHeaders($type0, $type1, $filename, $force) {
 143     global $_SERVER, $languages, $squirrelmail_language;
 144     $isIE = $isIE6 = 0;
 145
 146     $HTTP_USER_AGENT = $_SERVER['HTTP_USER_AGENT'];
 147
 148     if (strstr($HTTP_USER_AGENT, 'compatible; MSIE ') !== false &&
 149         strstr($HTTP_USER_AGENT, 'Opera') === false) {
 150         $isIE = 1;
 151     }
 152
 153     if (strstr($HTTP_USER_AGENT, 'compatible; MSIE 6') !== false &&
 154         strstr($HTTP_USER_AGENT, 'Opera') === false) {
 155         $isIE6 = 1;
 156     }
 157
 158     if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
 159         function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) {
 160         $filename =
 161             $languages[$squirrelmail_language]['XTRA_CODE']('downloadfilename', $filename, $HTTP_USER_AGENT);
 162     } else {
 163        $filename = ereg_replace('[^-a-zA-Z0-9\.]', '_', $filename);
 164     }
 165
 166     // A Pox on Microsoft and it's Office!
 167     if (!$force) {
 168         // Try to show in browser window
 169         header("Content-Disposition: inline; filename=\"$filename\"");
 170         header("Content-Type: $type0/$type1; name=\"$filename\"");
 171     } else {
 172         // Try to pop up the "save as" box
 173         // IE makes this hard.  It pops up 2 save boxes, or none.
 174         // http://support.microsoft.com/support/kb/articles/Q238/5/88.ASP
 175         // But, accordint to Microsoft, it is "RFC compliant but doesn't
 176         // take into account some deviations that allowed within the
 177         // specification."  Doesn't that mean RFC non-compliant?
 178         // http://support.microsoft.com/support/kb/articles/Q258/4/52.ASP
 179         //
 180         // The best thing you can do for IE is to upgrade to the latest
 181         // version
 182         if ($isIE && !$isIE6) {
 183             // http://support.microsoft.com/support/kb/articles/Q182/3/15.asp
 184             // Do not have quotes around filename, but that applied to
 185             // "attachment"... does it apply to inline too?
 186             //
 187             // This combination seems to work mostly.  IE 5.5 SP 1 has
 188             // known issues (see the Microsoft Knowledge Base)
 189             header("Content-Disposition: inline; filename=$filename");
 190             // This works for most types, but doesn't work with Word files
 191             header("Content-Type: application/download; name=\"$filename\"");
 192
 193             // These are spares, just in case.  :-)
 194             //header("Content-Type: $type0/$type1; name=\"$filename\"");
 195             //header("Content-Type: application/x-msdownload; name=\"$filename\"");
 196             //header("Content-Type: application/octet-stream; name=\"$filename\"");
 197         } else {
 198             header("Content-Disposition: attachment; filename=\"$filename\"");
 199             // application/octet-stream forces download for Netscape
 200             header("Content-Type: application/octet-stream; name=\"$filename\"");
 201         }
 202     }
 203 }
 204 ?>