Version 1.0 final commit

Version 1.0 final commit

src/Bhutanio/BEncode/Bencode.php

@@ -5,9 +5,253 @@
  * A BEncode Wrapper for Laravel
  * Original src - https://wiki.theory.org/Decoding_encoding_bencoded_data_with_PHP
  * 
+ * GIT :: https://github.com/bhutanio/laravel-bencode
+ * 
  * @package laravel-bencode
  * @author Abi Xalmon
  */
 class BENCODE {
+
+	//public $announce = 'http://abi.io/announce';
+	public $announce = null;
+	// Torrent Comment
+	public $comment = null;
+	// Created by Program
+	public $created_by = null;
+
+	function __construct() {
+		// Here you can load default announce URL, comment and created_by from your configuration file.
+	}
+
+	// Set torrent data
+	/**
+	 * Data Setter
+	 * @param array $data [array of public variables]
+	 * eg:
+	 * 
+	 * 	BENCODE::set([
+	 *		'announce'=>'http://www.torrentsite.com',
+	 *		'comment'=>'Downloaded from torrentsite.com',
+	 *		'created_by'=>'TorrentSite v1.0'
+	 *	]);
+	 */
+	public function set($data=array())
+	{
+		if ( is_array($data) ) {
+			foreach ($data as $key => $value) {
+				$this->$key = $value;
+			}
+		}
+	}
+
+	/**
+	 * Decode a torrent file into Bencoded data
+	 * @param  string  $s 	[link to torrent file]
+	 * @param  integer $pos [file position pointer]
+	 * @return array/null 	[Array of Bencoded data]
+	 * eg:
+	 * 		$torrent = BENCODE::bdecode( File::get('MyMovieTorrent.torrent'));
+	 *  	var_dump($torrent);
+	 */
+	public function bdecode($s, &$pos=0)
+	{
+		if($pos>=strlen($s)) {
+			return null;
+		}
+		switch($s[$pos]){
+		case 'd':
+			$pos++;
+			$retval=array();
+			while ($s[$pos]!='e'){
+				$key=BENCODE::bdecode($s, $pos);
+				$val=BENCODE::bdecode($s, $pos);
+				if ($key===null || $val===null)
+					break;
+				$retval[$key]=$val;
+			}
+			$retval["isDct"]=true;
+			$pos++;
+			return $retval;
+
+		case 'l':
+			$pos++;
+			$retval=array();
+			while ($s[$pos]!='e'){
+				$val=BENCODE::bdecode($s, $pos);
+				if ($val===null)
+					break;
+				$retval[]=$val;
+			}
+			$pos++;
+			return $retval;
+
+		case 'i':
+			$pos++;
+			$digits=strpos($s, 'e', $pos)-$pos;
+			$val=round((float)substr($s, $pos, $digits));
+			$pos+=$digits+1;
+			return $val;
+
+	//	case "0": case "1": case "2": case "3": case "4":
+	//	case "5": case "6": case "7": case "8": case "9":
+		default:
+			$digits=strpos($s, ':', $pos)-$pos;
+			if ($digits<0 || $digits >20)
+				return null;
+			$len=(int)substr($s, $pos, $digits);
+			$pos+=$digits+1;
+			$str=substr($s, $pos, $len);
+			$pos+=$len;
+			//echo "pos: $pos str: [$str] len: $len digits: $digits\n";
+			return (string)$str;
+		}
+		return null;
+	}
+
+	/**
+	 * Created Torrent file from Bencoded data
+	 * @param  array $d [array data of a decoded torrent file]
+	 * @return string 	[data can be downloaded as torrent]
+	 */
+	public function bencode(&$d)
+	{
+		if(is_array($d)){
+			$ret="l";
+			$isDict = false;
+			if( isset($d["isDct"]) && $d["isDct"]===true ){
+				$isDict=1;
+				$ret="d";
+				// this is required by the specs, and BitTornado actualy chokes on unsorted dictionaries
+				ksort($d, SORT_STRING);
+			}
+			foreach($d as $key=>$value) {
+				if($isDict){
+					// skip the isDct element, only if it's set by us
+					if($key=="isDct" and is_bool($value)) continue;
+					$ret.=strlen($key).":".$key;
+				}
+				if (is_int($value) || is_float($value)){
+					$ret.="i${value}e";
+				}else if (is_string($value)) {
+					$ret.=strlen($value).":".$value;
+				} else {
+					$ret.=BENCODE::bencode ($value);
+				}
+			}
+			return $ret."e";
+		} elseif (is_string($d)) // fallback if we're given a single bencoded string or int
+			return strlen($d).":".$d;
+		elseif (is_int($d) || is_float($d))
+			return "i${d}e";
+		else
+			return null;
+	}
+
+	/**
+	 * Decode a torrent file into Bencoded data
+	 * @param  string $filename 	[File Path]
+	 * @return array/null 			[Array of Bencoded data]
+	 */
+	public function bdecode_file($filename)
+	{
+		if ( is_file($filename) ) {
+			$f=file_get_contents($filename, FILE_BINARY);
+			return BENCODE::bdecode($f);
+		}
+		return null;
+	}
+
+	/**
+	 * Generate list of files in a torrent
+	 * @param  array $data 	[array data of a decoded torrent file]
+	 * @return array 		[list of files in an array]
+	 */
+	public function filelist($data)
+	{
+		$FileCount = 0;
+		$FileList = array();
+		if(!isset($data['info']['files']) ) // Single file mode
+		{
+			$FileCount = 1;
+			$TotalSize = $data['info']['length'];
+			$FileList[]= array($data['info']['length'], $data['info']['name']);
+		} else { // Multiple file mode
+			$FileNames = array();
+			$TotalSize = 0;
+			$Files = $data['info']['files'];
+			foreach($Files as $File) {
+				$FileCount++;
+				$TotalSize+=$File['length'];
+				$FileSize = $File['length'];
+
+				$FileName = ltrim(implode('/',$File['path']), '/');
+
+				$FileList[] = array('size'=>$FileSize, 'name'=>$FileName);
+				$FileNames[] = $FileName;
+			}
+			array_multisort($FileNames, $FileList);
+		}
+		return array('file_count'=>$FileCount, 'total_size'=>$TotalSize, 'files'=>$FileList);
+	}
+
+	/**
+	 * Replace array data on Decoded torrent data so that it can be bencoded into a private torrent file.
+	 * Provide the custom data using BENCODE::set();
+	 * @param  array $data 	[array data of a decoded torrent file]
+	 * @return array 		[array data for torrent file]
+	 */
+	public function make_private($data)
+	{
+		// Remove announce
+		// announce-list is an unofficial extension to the protocol
+		// that allows for multiple trackers per torrent
+		unset($data['announce']);
+		unset($data['announce-list']);
+
+		// Bitcomet & Azureus cache peers in here
+		unset($data['nodes']);
+
+		// Azureus stores the dht_backup_enable flag here
+		unset($data['azureus_properties']);
+
+		// Remove web-seeds
+		unset($data['url-list']);
+
+		// Remove libtorrent resume info
+		unset($data['libtorrent_resume']);
+
+		// Remove profiles / Media Infos
+		unset($data['info']['profiles']);
+		unset($data['info']['file-duration']);
+		unset($data['info']['file-media']);
+
+		// Add Announce URL
+		if ( is_array($this->announce) ) {
+			$data['announce'] = reset($this->announce);
+			$data["announce-list"] = array();
+			$announce_list = array();
+			foreach ($this->announce as $announceUri) {
+				$announce_list[] = $announceUri;
+			}
+			$data["announce-list"] = $announce_list;
+		} else {
+			$data['announce'] = $this->announce;
+		}
+
+		// Add Comment
+		$data['comment'] = $this->comment;
+
+		// Created by and Created on
+		$data['created by'] = $this->created_by;
+		$data['creation date'] = time();
+
+		// Make Private
+		$data['info']['private'] = 1;
+
+		// Sort by key to respect spec
+		ksort($data['info']);
+		ksort($data);
 
+		return $data;
+	}
 }