Soundcloud mp3 extract0r

<?php
/*	@name: soundcloud-mp3-extract0r.php
 *	@author: c0re <http://enigmagroup.org/>
 *	@version: 1.0
 *	@copyright: <http://creativecommons.org/licenses/by-nc-sa/3.0/>
 */
 
print 
'------------------------------------------------------
                   _     _           _ 
 ___ ___ _ _ ___ _| |___| |___ _ _ _| |
|_ -| . | | |   | . |  _| | . | | | . |
|___|___|___|_|_|___|___|_|___|___|___|
                          mp3 extract0r
 
by c0re <http://enigmagroup.org/>
 
usage: php '.htmlspecialchars($_SERVER['PHP_SELF']).' <URL> <newName>
------------------------------------------------------';
 
$url = urldecode(@$argv[1]); //1 parameter is original url
$name = htmlspecialchars(@$argv[2]); //2 parameter is the name of the file
if(empty($url) || empty($name)) {
	die("\n[-]ERROR: invalide arguments passed");
}
 
//now we combine all and get our mp3 ;)
downloadMp3(getSource($url),$name); 
	print("\n\n[DONE] file saved in ".@getcwd()."\\".$name.".mp3\n");
?>
 
<?php
function getSource($url)
{
	//with a strong regex pattern to validate urls copy as you like..
	$pattern = '%\b(?:(?:http|https)://|www\.)[\d.a-z-]+\.[a-z]{2,6}(?::\d{1,5}+)?(?:/[!$\'()*+,._a-z-]++){0,10}(?:/[!$\'()*+,._a-z-]+)?(?:\?[!$&\'()*+,.=_a-z-]*)?%i';
	//..we check if url is valid
	if(!preg_match($pattern, $url)) {
		die("\n[-]ERROR: argv[1] doesnt look like an URL");
	}
	//next check if curl is available
	if (!function_exists('curl_init')) {
		print("\n\nWARNING: cURL not installed!\ntrying file_get_contents ...\n");
		$markup = file_get_contents($url);
		if(empty($markup)) {
			die("\n[-]ERROR: couldnt get markup");
		}
		//find anything between streamUrl":" and ",
		//( eg: "streamUrl":"http://media.soundcloud.com/stream/3mZyUWW9iikL?stream_token=wK1Cm", ) 
		if(preg_match('/streamUrl\"\:\"(.*?)\"\,/', $markup, $stream)) {
			//return the splitted array from the regex
			return $stream[1];
		}
	}
	//set a blank + useragent for the header
	$referer = "";
	$useragent = "Mozilla/5.0 (Windows; U; Windows NT 6.1; de; rv:1.9.2.13) Gecko/20101203 Firefox/3.6.13";
	//send an header array containing normal looking firefox 3.x.x data
	$header = array( 
		"Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
		"Accept-Language: en-us;q=0.5,en;q=0.3",
		"Accept-Encoding: gzip,deflate",
		"Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7",
		"Keep-Alive: 115",
		"Connection: keep-alive"
		);	
	//initialize the handle
	$curl = curl_init();
	//stuff it all in an array for curl_setopt
	$options = array(
		CURLOPT_URL => $url,				//set the url
		CURLOPT_RETURNTRANSFER => true,		//return webpage
		CURLOPT_BINARYTRANSFER => true,		//return untouch data
		CURLOPT_USERAGENT => $useragent,	//send custom useragent
		CURLOPT_REFERER => $referer,		//send custom refferer
		CURLOPT_HTTPHEADER => $header,		//send custom header
		CURLOPT_ENCODING => "",       		//handle all encodings
		CURLOPT_HEADER => false, 			//dont return headers
		CURLOPT_TIMEOUT => 10				//a little break
		);		
	//apply the options array
	curl_setopt_array($curl, $options);
	//execute the whole thing
	$markup = curl_exec($curl);
	//get the answer for error code checking
	$returncode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
	//close handle, free up memory
	curl_close($curl);
	//check for html error codes
	if($returncode != 200 && $returncode != 302 && $returncode != 304) {
		die("\n[-]ERROR: this URL seems not alive!");
	}
	//check if we got html source to search
	if(!empty($markup)) {
		//find anything between streamUrl":" and ",
		//( eg: "streamUrl":"http://media.soundcloud.com/stream/3mZyUWW9iikL?stream_token=wK1Cm", ) 
		if(preg_match('/streamUrl\"\:\"(.*?)\"\,/', $markup, $stream)) {
			//return the splitted array from the regex
			return $stream[1];
		}
		else { die("\[-]nERROR: cant find the streamUrl"); }
	} 
	else { die("\n[-]ERROR: couldnt receive html source"); }
}
function downloadMp3($stream,$name)
{
	//check if we find any extension in $name
	if(stristr($name, '.mp3')) {
		die("\n[-]ERROR: argv[2] doesnt need any kind of extension");
	}
	//just send a blank referer now
	$referer = "";
	//initialize the handle
	$curl = curl_init();
	//set the new filename
	$filename = dirname(__FILE__).'/'.$name.'.mp3';
	//set the filehandle for writing
	$handle = fopen($filename,'w');
	//stuff it all in an array for curl_setopt
	$options = array(
		CURLOPT_URL => $stream,			//set the url
		CURLOPT_FOLLOWLOCATION => true,	//follow location headers
		/* 
		PLEASE NOTE: without curlopt_followlocation set this wont
					 work because soundcloud redirects you to a
					 random created link
		 */
		CURLOPT_REFERER => $referer,	//sent custom refferer
		CURLOPT_HEADER => false, 		//dont return headers
		CURLOPT_FILE => $handle,		//set the file handle
		);		
	//apply the options array
	curl_setopt_array($curl, $options);
	//execute it
	curl_exec($curl);
	//close handle, free up memory
	curl_close($curl);
	//close the file handle, free up memory
	fclose($handle);
}
?>