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The .torrent-generator allowing projects to dynamically generator .torrent-data for their files. 

svn path=/trunk/boinc/; revision=12950
This commit is contained in:
Janus B. Kristensen 2007-06-17 13:43:18 +00:00
parent 0bca6eb680
commit e762c01b34
1 changed files with 57 additions and 0 deletions
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html/bt/torrent_cache.php Executable file
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<?php
/**
* The torrent cache and generator script takes care of dynamically generating .torrents
* when they are requested by clients.
* To optimize performance .torrent-objects are cached in the cache directory so that
* on any second request they can be directly sent without re-calculating the SHA1 strings.
*
* A file is requested by torrent_cache.php?file=/some_file.filetype
*
* Symlinks outside the $fileDirectory are not allowed. Either do hardlinking or make the
* entire $fileDirectory a symlink somewhere.
*
* The optional webseeds must be HTTP servers with a similar structure to $fileDirectory
* For instance if you have a webseed called "http://burp.boinc.dk/download/" and a file
* $fileDirectory/dir/file
* then the webseed musst respond to queries on http://burp.boinc.dk/download/dir/file.
*
* Please see config.php for the setting of these variables.
*/
require_once("config.php");
function isSubDir($possibleSubDir, $parent){
$realPossible = realpath($possibleSubDir);
$realParent = realpath($parent);
return (substr($realPossible, 0, strlen($realParent)) == $realParent);
}
// Get the file request and do some checkups
$file = $_GET["file"];
if (!$file) throw new IllegalArgumentException("No file specified");
if (strpos(urldecode($file), "..")!==false) throw new IllegalArgumentException("Cannot use '..' in path");
$file = $fileDirectory.$file;
if (($fileModTime = filemtime($file)) === false) throw new IllegalArgumentException("File does not exist");
if (!$fileFilter->isValid($file)) throw new IllegalArgumentException("File was not accepted by the server for tracking.");
// Everything's fine let's lookup the .torrent in the cache if needed:
$cache_args = "file=".$file."&modtime=".$fileModTime;
$cacheddata=get_cached_data(TORRENT_CACHE_TTL,$cache_args);
if ($cacheddata){ //If we have got the data in cache
$torrent = unserialize($cacheddata); // use the cached data
} else { //if not do queries etc to generate new data
for ($i=0; $i<sizeof($webseeds);$i++){
$realWebseeds[] = $webseeds[$i].substr($file, strlen($fileDirectory));
}
$torrent = new Torrent($file, $trackerURL, $realWebseeds);
$torrent->ensureSHA1Loaded();
db_init();
$torrent->register();
set_cache_data(serialize($torrent),$cache_args); //save data in cache
};
header("Content-type: application/x-bittorrent");
header("Content-Disposition: attachment; filename=\"".basename($file).".torrent\"");
echo $torrent->toEncoded();
?>