- function SendDownloadHeaders($type0, $type1, $filename, $force, $filesize=0) {
- global $languages, $squirrelmail_language;
- $isIE = $isIE6 = 0;
-
- sqgetGlobalVar('HTTP_USER_AGENT', $HTTP_USER_AGENT, SQ_SERVER);
-
- if (strstr($HTTP_USER_AGENT, 'compatible; MSIE ') !== false &&
- strstr($HTTP_USER_AGENT, 'Opera') === false) {
- $isIE = 1;
- }
-
- if (strstr($HTTP_USER_AGENT, 'compatible; MSIE 6') !== false &&
- strstr($HTTP_USER_AGENT, 'Opera') === false) {
- $isIE6 = 1;
- }
-
- if (isset($languages[$squirrelmail_language]['XTRA_CODE']) &&
- function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) {
- $filename =
- $languages[$squirrelmail_language]['XTRA_CODE']('downloadfilename', $filename, $HTTP_USER_AGENT);
- } else {
- $filename = ereg_replace('[\\/:\*\?"<>\|;]', '_', str_replace(' ', ' ', $filename));
- }
-
- // A Pox on Microsoft and it's Internet Explorer!
- //
- // IE has lots of bugs with file downloads.
- // It also has problems with SSL. Both of these cause problems
- // for us in this function.
- //
- // See this article on Cache Control headers and SSL
- // http://support.microsoft.com/default.aspx?scid=kb;en-us;323308
- //
- // The best thing you can do for IE is to upgrade to the latest
- // version
- //set all the Cache Control Headers for IE
- if ($isIE) {
- header ("Pragma: public");
- header ("Cache-Control: no-store, max-age=0, no-cache, must-revalidate"); # HTTP/1.1
- header ("Cache-Control: post-check=0, pre-check=0", false);
- header ("Cache-control: private");
-
- //set the inline header for IE, we'll add the attachment header later if we need it
- header ("Content-Disposition: inline; filename=$filename");
- }
-
- if (!$force) {
- // Try to show in browser window
- header ("Content-Disposition: inline; filename=\"$filename\"");
- header ("Content-Type: $type0/$type1; name=\"$filename\"");
- } else {
- // Try to pop up the "save as" box
-
- // IE makes this hard. It pops up 2 save boxes, or none.
- // http://support.microsoft.com/support/kb/articles/Q238/5/88.ASP
- // http://support.microsoft.com/default.aspx?scid=kb;EN-US;260519
- // But, according to Microsoft, it is "RFC compliant but doesn't
- // take into account some deviations that allowed within the
- // specification." Doesn't that mean RFC non-compliant?
- // http://support.microsoft.com/support/kb/articles/Q258/4/52.ASP
-
- // all browsers need the application/octet-stream header for this
- header ("Content-Type: application/octet-stream; name=\"$filename\"");
-
- // http://support.microsoft.com/support/kb/articles/Q182/3/15.asp
- // Do not have quotes around filename, but that applied to
- // "attachment"... does it apply to inline too?
- header ("Content-Disposition: attachment; filename=\"$filename\"");
-
- if ($isIE && !$isIE6) {
- // This combination seems to work mostly. IE 5.5 SP 1 has
- // known issues (see the Microsoft Knowledge Base)
-
- // This works for most types, but doesn't work with Word files
- header ("Content-Type: application/download; name=\"$filename\"");
-
- // These are spares, just in case. :-)
- //header("Content-Type: $type0/$type1; name=\"$filename\"");
- //header("Content-Type: application/x-msdownload; name=\"$filename\"");
- //header("Content-Type: application/octet-stream; name=\"$filename\"");
- } else {
- // another application/octet-stream forces download for Netscape
- header ("Content-Type: application/octet-stream; name=\"$filename\"");
- }
- }
-
- //send the content-length header if the calling function provides it
- if ($filesize > 0) {
- header("Content-Length: $filesize");
- }