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