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{"header":{"session":"15618724056fab1058a5324dddec4d02"},"fault":{"code":256,"message":"invalid token"}}

"59f4a7" + util.generateSHA1("getStreamKeyFromSongIDEx:" + token + ":theTicketsAreNowDiamonds:59f4a7").toLowerCase();

import org.json.JSONObject;

public class MainClass {

   static Util util = new Util();
   /**
    * @param args
    * @throws Throwable
    */
   public static void main(String[] args) throws Throwable {
      String session = util.getSession();
      String secretKey = util.generateMD5(session);
      System.out.println(session);
      System.out.println(secretKey);
      String currentPost = "{\"method\":\"getCommunicationToken\",\"parameters\":{\"secretKey\":\"" + secretKey + "\"},\"header\":{\"privacy\":0,\"client\":\"htmlshark\",\"clientRevision\":\"20110906\",\"uuid\":\"A8E97220-4B23-4848-8D69-77736EFFBB02\",\"session\":\"" + session + "\",\"country\":{\"ID\":\"55\",\"CC1\":\"18014398509481984\",\"CC3\":\"0\",\"CC2\":\"0\",\"CC4\":\"0\",\"IPR\":\"9075\"}}}";
      String executerequest = util.executePost(currentPost, "http://grooveshark.com/more.php?getCommunicationToken");
      System.out.println(executerequest);
      JSONObject json = new JSONObject(executerequest);
      System.out.println(json.get("result"));
      String token = json.getString("result");
      currentPost = "{\"method\":\"getStreamKeyFromSongIDEx\",\"parameters\":{\"prefetch\":false,\"country\":{\"IPR\":\"9075\",\"CC2\":\"0\",\"ID\":\"55\",\"CC1\":\"18014398509481984\",\"CC3\":\"0\",\"CC4\":\"0\"},\"songID\":165150,\"mobile\":false},\"header\":{\"uuid\":\"9E2BC2EF-3B5D-46AA-9D15-CCB80826F4AF\",\"country\":{\"IPR\":\"9075\",\"CC2\":\"0\",\"ID\":\"55\",\"CC1\":\"18014398509481984\",\"CC3\":\"0\",\"CC4\":\"0\"},\"privacy\":0,\"session\":\"" + session + "\",\"token\":\"" + "59f4a7" + util.generateSHA1("getStreamKeyFromSongIDEx:" + token + ":theTicketsAreNowDiamonds:" + "59f4a7").toLowerCase() + "\",\"clientRevision\":\"20110906\",\"client\":\"jsqueue\"}}";
      executerequest = util.executePost(currentPost, "http://grooveshark.com/more.php?getStreamKeyFromSongIDEx");
      System.out.println(executerequest);
                //the line below is only for SHA testing purposes
      System.out.println(util.generateSHA1("abc"));
   }
}

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.math.BigInteger;
import java.net.URL;
import java.net.URLConnection;
import java.security.MessageDigest;

public class Util {
   public String executePost(String got, String urlString) throws Throwable {

      // Initialisation of Variables
      String line;
      String returnString;

      // Send data
      URL url = new URL(urlString);
      URLConnection conn = url.openConnection();
      conn.setDoOutput(true);
      conn.setRequestProperty("User-Agent",
            "Mozilla/5.0 (X11; Linux i686 rv: 8.0) Gecko/20100101 Firefox/8.0");
      conn.setRequestProperty("Content-Type", "application/json");
      conn.setRequestProperty("Referer", "http://grooveshark.com/JSQueue.swf?20111121.04");
      OutputStreamWriter wr = new OutputStreamWriter(conn.getOutputStream());
      wr.write(got);
      wr.flush();

      // Get response
      BufferedReader rd = new BufferedReader(new InputStreamReader(
            conn.getInputStream()));
      returnString = rd.readLine();

      while ((line = rd.readLine()) != null) {
         returnString += "\n" + line;
      }

      return returnString;
   }

   public String getContent(String urlString) throws Throwable {
      String returnString;
      String line;
      URL url = new URL(urlString);
      URLConnection conn = url.openConnection();
      conn.setRequestProperty("User-Agent",
            "Mozilla/5.0 (X11; Linux i686 rv: 8.0) Gecko/20100101 Firefox/8.0");
      BufferedReader in = new BufferedReader(new InputStreamReader(
            conn.getInputStream()));
      returnString = in.readLine();
      while ((line = in.readLine()) != null) {
         returnString += "\n" + line;
      }
      return returnString;
   }

   public String getSession() throws Throwable {

      URL url = new URL("http://grooveshark.com");
      URLConnection conn = url.openConnection();
      conn.setRequestProperty("User-Agent",
            "Mozilla/5.0 (X11; Linux i686 rv: 8.0) Gecko/20100101 Firefox/8.0");
      String split1[], split2[];
      split1 = conn.getHeaderField("Set-Cookie").split(";");
      split2 = split1[0].split("=");

      return split2[1];
   }

   public String generateMD5(String input) throws Throwable {

      String output;

      MessageDigest m = MessageDigest.getInstance("MD5");
      m.update(input.getBytes(), 0, input.length());
      output = new BigInteger(1, m.digest()).toString(16);

      while (output.length() < 32) {
         output = "0" + output;
      }

      return output;
   }

   public String generateSHA1(String input) throws Throwable {

      MessageDigest md = MessageDigest.getInstance("SHA1");
      md.update(input.getBytes());
      byte[] output = md.digest();

      return bytesToHex(output);
   }

   private String bytesToHex(byte[] b) {
      char hexDigit[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
            'A', 'B', 'C', 'D', 'E', 'F' };
      StringBuffer buf = new StringBuffer();
      for (int j = 0; j < b.length; j++) {
         buf.append(hexDigit[(b[j] >> 4) & 0x0f]);
         buf.append(hexDigit[b[j] & 0x0f]);
      }
      return buf.toString();
   }

}