src/download.php

   1 <?php
   2
   3 /**
   4  * download.php
   5  *
   6  * Copyright (c) 1999-2003 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 = (int) $_GET['passed_id'];
  33 $ent_id = $_GET['ent_id'];
  34 $messages = $_SESSION['messages'];
  35
  36 if (isset($_GET['absolute_dl'])) {
  37    $absolute_dl = $_GET['absolute_dl'];
  38 }
  39
  40 /* end globals */
  41 $mailbox = decodeHeader($mailbox);
  42
  43 global $uid_support;
  44
  45 $imapConnection = sqimap_login($username, $key, $imapServerAddress, $imapPort, 0);
  46 $mbx_response =  sqimap_mailbox_select($imapConnection, $mailbox);
  47
  48 $message = &$messages[$mbx_response['UIDVALIDITY']]["$passed_id"];
  49 if (!is_object($message)) {
  50     $message = sqimap_get_message($imapConnection,$passed_id, $mailbox);
  51 }
  52 $subject = $message->rfc822_header->subject;
  53 if ($ent_id) {
  54     $message = &$message->getEntity($ent_id);
  55     $header = $message->header;
  56
  57     if ($message->rfc822_header) {
  58        $subject = $message->rfc822_header->subject;
  59        $charset = $header->content_type->properties['charset'];
  60     } else {
  61        $header = $message->header;
  62        $charset = $header->getParameter('charset');
  63     }
  64     $type0 = $header->type0;
  65     $type1 = $header->type1;
  66     $encoding = strtolower($header->encoding);
  67 } else {
  68     /* raw message */
  69     $type0 = 'message';
  70     $type1 = 'rfc822';
  71     $encoding = "US-ASCII";
  72 }
  73
  74 /*
  75  * lets redefine message as this particular entity that we wish to display.
  76  * it should hold only the header for this entity.  We need to fetch the body
  77  * yet before we can display anything.
  78  */
  79
  80 if (isset($override_type0)) {
  81     $type0 = $override_type0;
  82 }
  83 if (isset($override_type1)) {
  84     $type1 = $override_type1;
  85 }
  86 $filename = '';
  87 if (is_object($message->header->disposition)) {
  88     $filename = decodeHeader($header->disposition->getProperty('filename'));
  89     if (!$filename) {
  90         $filename = decodeHeader($header->disposition->getProperty('name'));
  91     }
  92     if (!$filename) {
  93         $filename = decodeHeader($header->getParameter('name'));
  94     }
  95 } else {
  96     $filename = decodeHeader($header->getParameter('name'));
  97 }
  98
  99 if (strlen($filename) < 1) {
 100     if ($type1 == 'plain' && $type0 == 'text') {
 101         $suffix = 'txt';
 102         $filename = $subject . '.txt';
 103     } else if ($type1 == 'richtext' && $type0 == 'text') {
 104         $suffix = 'rtf';
 105         $filename = $subject . '.rtf';
 106     } else if ($type1 == 'postscript' && $type0 == 'application') {
 107         $suffix = 'ps';
 108         $filename = $subject . '.ps';
 109     } else if ($type1 == 'rfc822' && $type0 == 'message') {
 110         $suffix = 'eml';
 111         $filename = $subject . '.msg';
 112     } else {
 113         $suffix = $type1;
 114     }
 115
 116     if (strlen($filename) < 1) {
 117        $filename = 'untitled'.strip_tags($ent_id).$suffix;
 118     } else {
 119        $filename = "$filename.$suffix";
 120     }
 121 }
 122
 123 /*
 124  * Note:
 125  *    The following sections display the attachment in different
 126  *    ways depending on how they choose.  The first way will download
 127  *    under any circumstance.  This sets the Content-type to be
 128  *    applicatin/octet-stream, which should be interpreted by the
 129  *    browser as "download me".
 130  *      The second method (view) is used for images or other formats
 131  *    that should be able to be handled by the browser.  It will
 132  *    most likely display the attachment inline inside the browser.
 133  *      And finally, the third one will be used by default.  If it
 134  *    is displayable (text or html), it will load them up in a text
 135  *    viewer (built in to squirrelmail).  Otherwise, it sets the
 136  *    content-type as application/octet-stream
 137  */
 138 if (isset($absolute_dl) && $absolute_dl) {
 139     DumpHeaders($type0, $type1, $filename, 1);
 140 } else {
 141     DumpHeaders($type0, $type1, $filename, 0);
 142 }
 143 /* be aware that any warning caused by download.php will corrupt the
 144  * attachment in case of ERROR reporting = E_ALL and the output is the screen */
 145 mime_print_body_lines ($imapConnection, $passed_id, $ent_id, $encoding);
 146
 147 /*
 148  * This function is verified to work with Netscape and the *very latest*
 149  * version of IE.  I don't know if it works with Opera, but it should now.
 150  */
 151 function DumpHeaders($type0, $type1, $filename, $force) {
 152     global $_SERVER, $languages, $squirrelmail_language;
 153     $isIE = $isIE6 = 0;
 154
 155     $HTTP_USER_AGENT = $_SERVER['HTTP_USER_AGENT'];
 156
 157     if (strstr($HTTP_USER_AGENT, 'compatible; MSIE ') !== false &&
 158         strstr($HTTP_USER_AGENT, 'Opera') === false) {
 159         $isIE = 1;
 160     }
 161
 162     if (strstr($HTTP_USER_AGENT, 'compatible; MSIE 6') !== false &&
 163         strstr($HTTP_USER_AGENT, 'Opera') === false) {
 164         $isIE6 = 1;
 165     }
 166
 167     if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
 168         function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) {
 169         $filename =
 170             $languages[$squirrelmail_language]['XTRA_CODE']('downloadfilename', $filename, $HTTP_USER_AGENT);
 171     } else {
 172        $filename = ereg_replace('[^-a-zA-Z0-9\.]', '_', $filename);
 173     }
 174
 175     // A Pox on Microsoft and it's Office!
 176     if (!$force) {
 177         // Try to show in browser window
 178         header("Content-Disposition: inline; filename=\"$filename\"");
 179         header("Content-Type: $type0/$type1; name=\"$filename\"");
 180     } else {
 181         // Try to pop up the "save as" box
 182         // IE makes this hard.  It pops up 2 save boxes, or none.
 183         // http://support.microsoft.com/support/kb/articles/Q238/5/88.ASP
 184         // But, accordint to Microsoft, it is "RFC compliant but doesn't
 185         // take into account some deviations that allowed within the
 186         // specification."  Doesn't that mean RFC non-compliant?
 187         // http://support.microsoft.com/support/kb/articles/Q258/4/52.ASP
 188         //
 189         // The best thing you can do for IE is to upgrade to the latest
 190         // version
 191         if ($isIE && !$isIE6) {
 192             // http://support.microsoft.com/support/kb/articles/Q182/3/15.asp
 193             // Do not have quotes around filename, but that applied to
 194             // "attachment"... does it apply to inline too?
 195             //
 196             // This combination seems to work mostly.  IE 5.5 SP 1 has
 197             // known issues (see the Microsoft Knowledge Base)
 198             header("Content-Disposition: inline; filename=$filename");
 199             // This works for most types, but doesn't work with Word files
 200             header("Content-Type: application/download; name=\"$filename\"");
 201
 202             // These are spares, just in case.  :-)
 203             //header("Content-Type: $type0/$type1; name=\"$filename\"");
 204             //header("Content-Type: application/x-msdownload; name=\"$filename\"");
 205             //header("Content-Type: application/octet-stream; name=\"$filename\"");
 206         } else {
 207             header("Content-Disposition: attachment; filename=\"$filename\"");
 208             // application/octet-stream forces download for Netscape
 209             header("Content-Type: application/octet-stream; name=\"$filename\"");
 210         }
 211     }
 212 }
 213 ?>