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