function MailifyPage($pagehash, $oldpagehash = false)
{
global $SERVER_ADMIN, $ArchivePageStore;
$from = isset($SERVER_ADMIN) ? $SERVER_ADMIN : 'foo@bar';
$head = "From {$from} " . ctime(time()) . "\r\n";
$head .= "Subject: " . encode_pagename_for_wikizip($pagehash['pagename']) . "\r\n";
$head .= "From: {$from} (PhpWiki)\r\n";
$head .= "Date: " . rfc1123date($pagehash['lastmodified']) . "\r\n";
$head .= "Mime-Version: 1.0 (Produced by PhpWiki 1.1.x)\r\n";
if (is_array($oldpagehash)) {
return $head . MimeMultipart(array(MimeifyPage($oldpagehash), MimeifyPage($pagehash)));
}
return $head . MimeifyPage($pagehash);
}
/** the designated file is sent to the visitor
*
* This transmits the file {$CFG->datadir}$file from
* the data directory to the visitor's browser, suggesting
* the name $name. The file is transmitted in chunks
* (see {@link readfile_chunked()}).
*
* Several different variations are possible.
*
* - by specifying a Time To Live of 0 seconds, this routine
* tries hard to defeat any caching by proxies
*
* - if the download flag is TRUE, this routine tries to
* prevent the visitor's browser to render the file in-line
* suggesting downloading instead
*
* Quirks
*
* - There appears to be a problem with Internet Explorer and https://
* and caching which requires a specific workaround. We simply check
* for 'https:' or 'http'.
*
* - Adobe Acrobat Reader has a bad track record of infecting
* user's computers with malware when PDF's are rendered in-line.
* Therefore we force download for that kind of files.
*
* - It is not easy to determine the exact mime type of files
* without resorting to a complex shadow-filesystem or a metadata
* table in the database. Therefore we 'guess' the mime type, either
* based on the information provided by the fileinfo PHP-module, or
* simply based on the extension of $file (which is not very reliable,
* but we have to do _something_). See {@link get_mimetype()} for details.
*
* @param string $file name of the file to send relative to $CFG->datadir
* @param string $name filename to suggest to the visitor/visitor's browser
* @param string $mimetype the mime type of the file; if not specified we use an educated guess
* @param int $ttl time to live (aka maximum age) in seconds, 0 implies file is not cacheable
* @param bool $download if TRUE we try to force a download
* @uses get_mimetype()
*/
function send_file_from_datadir($file, $name, $mimetype = '', $ttl = 86400, $download = FALSE)
{
global $CFG;
$path = $CFG->datadir . $file;
$mtime = filemtime($path);
$fsize = filesize($path);
if (empty($mimetype)) {
$mimetype = get_mimetype($path);
}
// Try to prevent inline rendering of PDF because of bugs in Adobe Reader
$ext = strtolower(pathinfo($path, PATHINFO_EXTENSION));
if ($mimetype == 'application/pdf' || $ext == 'pdf') {
$download = TRUE;
$ttl = 0;
}
$headers = array();
$headers['Last-Modified'] = rfc1123date($mtime);
$headers['Content-Disposition'] = sprintf('%s; filename=%s', $download ? 'attachment' : 'inline', urlencode($name));
$headers['Content-Type'] = $mimetype;
$headers['Content-Length'] = $fsize;
$headers['Accept-Ranges'] = 'none';
if ($ttl > 0) {
$headers['Cache-Control'] = sprintf('max-age=%d', $ttl);
$headers['Expires'] = rfc1123date(time() + $ttl);
$headers['Pragma'] = '';
} else {
if (strtolower(substr($CFG->www, 0, 6)) == 'https:') {
$ttl = 10;
$headers['Cache-Control'] = sprintf('max-age=%d', $ttl);
$headers['Expires'] = rfc1123date(time() - 86400);
// 24h in the past
$headers['Pragma'] = '';
} else {
$headers['Cache-Control'] = 'private, must-revalidate, max-age=0';
$headers['Expires'] = rfc1123date(time() - 86400);
// 24h in the past
$headers['Pragma'] = 'no-cache';
}
}
foreach ($headers as $k => $v) {
@header(trim($k . ': ' . $v));
}
$bytes = readfile_chunked($path);
return $bytes;
}
