mirror of https://github.com/BOINC/boinc.git
89 lines
3.0 KiB
PHP
89 lines
3.0 KiB
PHP
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<?php
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/**
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* A .torrent is a metafile containing info about a P2P file
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* This class encapsulates all related .torrent information
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* for a single file.
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* We don't seem to need multifile support since the clients can
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* simply download a .torrent for each file they want to fetch.
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*/
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$cvs_version_tracker[]="\$Id$"; //Generated automatically - do not edit
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class Torrent {
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private $trackerURL; // String
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private $name; // String
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private $pieceLength = 524288; // (512KB)
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private $filename; // String
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private $webseeds; // URL String Array
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private $concattedSHA1; // Imploded string of SHA1 hashes
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private $generatedPieceLength;
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private $infoHash;
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/**
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* Filename is the full path to the file to be encapsulated.
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*/
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function __construct($filename, $trackerURL, $webseeds=array()){
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if (!file_exists($filename)) throw new IllegalArgumentException("No such file found");
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$this->filename = $filename;
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$this->trackerURL = $trackerURL;
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$this->webseeds = $webseeds;
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$this->name = basename($filename);
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}
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/**
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* Scans the entire file generating SHA1 hashes for each piece
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*/
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public function ensureSHA1Loaded(){
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if (!$this->concattedSHA1 || ($this->pieceLength!=$this->generatedPieceLength)){
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$fh = fopen($this->filename, "rb");
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if (!$fh) throw new Exception("No filehandle");
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$fsize = filesize($this->filename);
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$this->concattedSHA1 = "";
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for ($i = 0; $i<ceil($fsize/$this->pieceLength); $i++){
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fseek($fh, $i*$this->pieceLength);
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$this->concattedSHA1 .= sha1(fread($fh,$this->pieceLength), true);
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}
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$this->generatedPieceLength = $this->pieceLength;
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fclose($fh);
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if (!$this->concattedSHA1) throw new Exception("No SHA gotten");
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}
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}
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/**
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* Fetches all relevant information from the file and generates a
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* .torrent
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*/
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public function toEncoded(){
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$infoArray["name"] = $this->name;
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$infoArray["piece length"] = $this->pieceLength;
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$infoArray["length"] = filesize($this->filename);
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$this->ensureSHA1Loaded();
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$infoArray["pieces"] = $this->concattedSHA1;
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$infoDictionary = new BElement(BDictionary::toEncoded($infoArray));
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$this->infoHash = sha1($infoDictionary->toEncoded(), true);
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$metainfoArray = array("announce"=>$this->trackerURL, "info"=>$infoDictionary);
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$metainfoArray["url-list"] = new BElement(BList::toEncoded($this->webseeds));
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$metainfoDictionary = BDictionary::toEncoded($metainfoArray);
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return $metainfoDictionary;
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}
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/**
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* Registers this torrent in the database
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*/
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public function register(){
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$this->toEncoded();
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// Check if exists:
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$queryHandle = mysql_query("SELECT id from bittorrent_files where filename=\"".process_user_text($this->filename)."\"");
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if ($queryHandle && $data = mysql_fetch_object($queryHandle)){
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$extra = "id=".$data->id.", ";
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} else {
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$extra = "";
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}
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mysql_query("REPLACE into bittorrent_files set ".$extra."filename=\"".process_user_text($this->filename)."\", info_hash=\"".process_user_text($this->infoHash)."\", timestamp=".time());
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}
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}
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