MSearchResponseHandler.java :  » Media » jems » net » kodeninja » UPnP » internal » discovery » Java Open Source

package net.kodeninja.UPnP.internal.discovery;

import java.net.MalformedURLException;
import java.net.URL;

import net.kodeninja.UPnP.UPnP;
import net.kodeninja.UPnP.UPnPCache;
import net.kodeninja.http.packet.HTTPBody;
import net.kodeninja.http.packet.HTTPHeader;
import net.kodeninja.http.packet.HTTPPacket;
import net.kodeninja.http.packet.HTTPResponseCode;
import net.kodeninja.http.service.HTTPSocket;
import net.kodeninja.http.service.handlers.PacketHandler;
import net.kodeninja.UPnP.identifiers.SSDPIdentifier;
import net.kodeninja.UPnP.identifiers.SSDPMalformedIdentifierException;
import net.kodeninja.UPnP.identifiers.USN;

public class MSearchResponseHandler implements PacketHandler {

  private UPnP host;
  
  public MSearchResponseHandler(UPnP host) {
    this.host = host;
  }
  
  public boolean process(HTTPSocket Socket, HTTPPacket<HTTPBody> Packet) {
    if (Packet.getHeader().getType() != HTTPHeader.HeaderType.RESPONSE)
      return false;
    
    if ((Packet.getHeader().getResponse().equals(HTTPResponseCode.HTTP_200_OK) == false) ||
        (Packet.getHeader().getParameter("EXT") == null) ||
        (Packet.getHeader().getParameter("ST") == null) ||
        (Packet.getHeader().getParameter("ST").equals("")))
      return false;
    
    try {
      UPnPCache cache;
      USN usn = USN.createInstance(Packet.getHeader().getParameter("USN"));
      String cacheControl = Packet.getHeader().getParameter("CACHE-CONTROL"); 
      int lifetime = Integer.parseInt(cacheControl.substring(cacheControl.indexOf("=") + 1));
      URL url = new URL(Packet.getHeader().getParameter("LOCATION"));
      String server = Packet.getHeader().getParameter("SERVER");
      SSDPIdentifier ident = SSDPIdentifier.createInstance(Packet.getHeader().getParameter("ST"));
      if (usn.getURN() != null) {
        if (usn.getURN().equals(ident) == false)
          throw new SSDPMalformedIdentifierException("URN described in USN and ST do not match.");
      }
      else if (usn.equals(ident) == false)
        throw new SSDPMalformedIdentifierException("UUID in USN and ST do not match.");
      
      cache = new UPnPCache(usn.getUUID(), ident, lifetime, url, server);
      host.addToCache(usn.getUUID(), cache);
    }
    catch (SSDPMalformedIdentifierException e) {
      e.printStackTrace();
    }
    catch (MalformedURLException e) {
      e.printStackTrace();
    }
    
    return true;
  }

}