File: download.php

<?
#################################
#WebNapster Client copyright 2000 
#Aakash Kambuj - aakash@kambuj.com 
#Kalpak Kothari - kalpak@mit.edu
#################################
#
#You are welcome to modify and distribute this code, but please retain
#this copyright notice above any notices you put.  Please send us a
#copy of your modified code.
#
#Napster is a registered trademark of Napster Inc - http://www.napster.com
#

function download($rhost,$rport,$title,$filename) {
  $MTU = 2048;
  $title = rawurldecode($title);
  $title = stripslashes($title);
  $filename = rawurldecode($filename);
  $filename = stripslashes($filename);

  $remote_user = fsockopen($rhost, $rport, &$errstr, &$errno);    //open a connection to the remote user
  if (!$remote_user){
    echo "ERROR $errstr ($errno)<br>\n";
    return;
  }
    
  //read magic character '1'
  $dt = (string)fread($remote_user, 1);
  if ($dt != "1") {
    print("<br>ERROR Expected magic character '1' from remote user: $dt");
    return;
  } 

  fwrite($remote_user, "GET");        // write string "GET"
  flush();
  //send file name to get
  $mess = "idearingwn " . $title . " 0";
  //  echo "$mess <br>";
  fwrite($remote_user, $mess);

  //read the size of the mp3 file
  $file_length ="";
  $temp=0;
  for ($i=0;$i<$MTU;$i++){
    $temp = (int)fread($remote_user,1);
    if ($temp==255){
      break;
    } 
    $file_length .= $temp;
  }       
  
  $mpsize = (int)$file_length;

  if ($mpsize <= 0) {
    echo "<br>ERROR. Remote user sent an invalid filesize: $mpsize";
    fclose($remote_user);
    exit;
  }

  $num = pack("C",255);

  // start sending file. indicate browser to download.
  header( "Content-type: application/octet-stream" );
  header( "Content-Disposition: attachment; filename=$filename" );
    
  echo $num;   //first byte of mp3 file

  $count=1;
  do {
    $received = fread($remote_user, $MTU);
    $count +=$MTU;
    echo $received;
  } while ($count<$file_length);
  fclose($remote_user);
  exit;
}

download($rhost,$rport,$title,$filename);

?>