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<?
// (c) marco "harddisk" schuster
// marco @ vmsoft-gbr.de
// rapidshare account data here
$rsc_acc="123456789";
$rsc_pass="blublub";

//sanity check
if(isset($_GET["f"]))
        $file=$_GET["f"];
else
        die("no file given");

//is it a valid rs link?
$r="@(http.?\:\/\/)?(.*)?rapidshare\.com\/files\/(.*)\/(.*)$@isU";
if(preg_match($r,$file,$hit)) {
        $fid=$hit[3]; //file identifier
        $fn=$hit[4];  //file name
} else
        die("incorrect url");

//check if the premium account has enough traffic for the file
$pa_stats=file("http://api.rapidshare.com/cgi-bin/rsapi.cgi?sub=getaccountdetails_v1&type=prem&login=$rsc_acc&password=$rsc_pass&withcookie=1");
foreach($pa_stats as $line) {
        $pair=split("=",$line);
        $pa[trim($pair[0])]=trim($pair[1]);
}
if( !($pa["premkbleft"]>0) || !(strlen($pa["cookie"])>0) )
        die("can not access account data. report to author!");
else {
        $kbleft=$pa["premkbleft"];
        $cookie=$pa["cookie"];
}

//let's get some file data and check the file itself
$fstats=file("http://api.rapidshare.com/cgi-bin/rsapi.cgi?sub=checkfiles_v1&files=$fid&filenames=$fn");
$fstats=split(",",trim($fstats[0]));
$fs=$fstats[2]/1024;    //convert to KB
if($fs>$kbleft)
        die("premium account is empty or has not enough KB left (available: $kbleft KB, filesize $fs KB). wait 24 hrs or contact account owner.");

//check if the file is accessible
switch((int)trim($fstats[4])){
        case 0:
        case 4:
        case 5:
                header("HTTP/1.1 404 Not Found");
                die("file not available (deleted or locked)");
                break;
        case 1:
        case 2:
        case 6:
                $url="http://rs".$fstats[3].$fstats[5].".rapidshare.com/files/".$fstats[0]."/".$fstats[1]."";
                break;
        case 3:
                header("HTTP/1.1 503 Service Unavailable");
                die("rapidshare server down, retry later");
                break;
}

$multipart=false;

//was a part of the file requested? (partial download)
$range=$_SERVER["HTTP_RANGE"];
if($range) {
        //pass client Range header to rapidshare
        $cookie.="\r\nRange: $range";
        $multipart=true;
        header("X-UR-RANGE-Range: $range");
}

//octet-stream + attachment => client always stores file
header('Content-type: application/octet-stream');
header('Content-Disposition: attachment; filename="'.$fn.'"');
//always included so clients know this script supports resuming
header("Accept-Ranges: bytes");

//awful hack to pass rapidshare the premium cookie
$user_agent = ini_get("user_agent");
ini_set("user_agent",$user_agent . "\r\nCookie: enc=$cookie");
$httphandle = fopen($url,"r");
$headers = stream_get_meta_data($httphandle);

//let's check the return header of rapidshare for range / length indicators
//we'll just pass these to the client
foreach($headers["wrapper_data"] as $header) {
        $header=trim($header);
        if(substr(strtolower($header),0,strlen("content-range"))=="content-range") {
                header($header);
                header("X-RS-RANGE-".$header);
                $multipart=true; //content-range indicates partial download
        } elseif(substr(strtolower($header),0,strlen("Content-Length"))=="content-length") {
                header($header);
                header("X-RS-CL-".$header);
        }
}

//now show the client he has a partial download
if($multipart)
        header('HTTP/1.1 206 Partial Content');

fpassthru($httphandle); //simply proxy the file content
fclose($httphandle); //free up resources
ini_set("user_agent",$user_agent); //restore old user agent to revert the hack

exit;

?>