View source of URL

Question

i want to view the source of a URL which contains some parameters
for example: i want to view the html source for the url
"http://forum.java.sun.com/post.jsp?forum=31"
i tried using URL u = new URL(args[0]); and datainputstream and i was able to retrive htmlcode of url without parameters eg:http://www.google.com ; but i want to get the html code for url's with parameters. how can this be done?
thanx in advance
soumya

Answer 1

Here's a little program I wrote when I was playing around with the URL class. It works, but the html returned is the Sun page that asks you to logon with your userid/password. I don't know how to get around that.
Hope it helps.
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.HttpURLConnection;
public class URLTester
     private final static String PROTOCOL = "http://";
     public static void main(String args[])
          if ( args.length != 1 )
               System.out.println("Usage: java URLTester <url>");
               System.exit(-1);
          String urlString = args[0];
          try
               // Create URL object from the URL string
               URL url = new URL(PROTOCOL + urlString);
               System.out.println( "\nURL Info:");
               System.out.println( "\tProtocol = " + url.getProtocol() );
     System.out.println( "\tHost = " + url.getHost() );
     System.out.println( "\tFilename = " + url.getFile() );
     System.out.println( "\tPort = " + url.getPort() );
               System.out.println( "\tRef = " + url.getRef() );
               // The connection object has information that my be
               // retrieved without parsing the data returned
               HttpURLConnection conn = (HttpURLConnection)url.openConnection();
               conn.connect();
               System.out.println( "\nConnection Info:");
               System.out.println( "\tResponse Code : " + conn.getResponseCode() );
               System.out.println( "\tResponse Message : " + conn.getResponseMessage() );
               System.out.println( "\tEncoding : " + conn.getContentEncoding() );
               System.out.println( "\tLength : " + conn.getContentLength() );
               System.out.println( "\tType : " + conn.getContentType() );
               System.out.println( "\tDate : " + conn.getDate() );
               System.out.println( "\tExpires : " + conn.getExpiration() );
               System.out.println( "\tModified : " + conn.getLastModified() );
               System.out.println( "\tContent : " + conn.getContent() );
               System.out.println( "\tUseCaches : " + conn.getUseCaches() );
               // Get an input stream from the URLConnection object
               // Note: if you dont need connection information you can get an
               // input stream from the URL object ( url.openStream() )
               InputStreamReader isr = new InputStreamReader( conn.getInputStream() );
               BufferedReader in = new BufferedReader( isr );
               String line;
               System.out.println( "\nFile Info:" );
               while ( (line = in.readLine() ) != null )
                    System.out.println( line );
               in.close();
          catch(IOException e)
               System.out.println( e );