import java.net.URL;
import java.net.URLConnection;
import java.io.PipedReader;
import java.io.PipedWriter;
import java.io.PrintWriter;
import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Pipes {
  public static void main(String args[]) throws Exception {
      if (args.length != 2) {
	  System.err.println("Skriv: java Pipes urlnamn filnamn");
	  System.exit(1);
      } // if

      // Skapa en koppling till webbservern
      URL url = new URL(args[0]);
      URLConnection con = url.openConnection();
      BufferedReader reader = new BufferedReader(new InputStreamReader(con.getInputStream()));

      // Skapa en pipe
      PipedReader inPipe = new PipedReader();
      PipedWriter outPipe = new PipedWriter(inPipe);
      PrintWriter writer = new PrintWriter(outPipe);

      // Skapa tråd för skrivning till disk
      FileThread thread = new FileThread(args[1], inPipe);
      thread.start();

      // Läs URL-filen, skriv till pipe
      System.out.println("Startar URL-läsning...");
      while (true) {
	  String buf = reader.readLine();
	  if (buf == null) {
	      break;
	  }
	  writer.println(buf);
      } // while
      writer.close();

      System.out.println("Då var läsningen klar då.");
  } // main
} // pipes_c