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