/**
 * HTTPGet.java
 * 
 * @author Jeff Ondich
 * @version 5/11/05
 *
 * This is a simple example of one way to retrieve a web file's source.
 * This program retrieves the same file twice--once using the raw
 * InputStream returned by URL.openStream, and once using a Scanner
 * object based on that InputStream.  For people Java using pre-1.5
 * you might want to investigate BufferedReader approaches
 * to taking input from the InputStream.
 */

import java.io.*;
import java.util.*;
import java.net.*;

class HTTPGet
{
    public static void main( String[] args )
    {
        String urlString = "http://cs.carleton.edu/faculty/jondich/courses/cs257_s07/index.html";

        System.out.print( retrievePageViaInputStream( urlString ) );
        System.out.println( "\n==========================================\n" );
        System.out.print( retrievePageViaScanner( urlString ) );
    }


    public static String retrievePageViaInputStream( String urlString )
    {
        String resultString = "";

        try
        {
            URL url = new URL( urlString );
            InputStream in = url.openStream();

            int ch;
            while( (ch=in.read()) != -1 )
                resultString += (char)ch;
        }

        catch( MalformedURLException e )
        {
            System.err.println( "Bad URL format: " + e.getMessage() );
        }

        catch( IOException e )
        {
            System.err.println( "No such URL: " + e.getMessage() );
        }

        return resultString;
    }


    public static String retrievePageViaScanner( String urlString )
    {
        String resultString = "";

        try
        {
            URL url = new URL( urlString );
            Scanner in = new Scanner( url.openStream() );

            while( in.hasNextLine() )
            {
                resultString += in.nextLine();
                resultString += '\n';
            }
        }

        catch( MalformedURLException e )
        {
            System.err.println( "Bad URL format: " + e.getMessage() );
        }

        catch( IOException e )
        {
            System.err.println( "No such URL: " + e.getMessage() );
        }

        return resultString;
    }
}