Login | Register   
LinkedIn
Google+
Twitter
RSS Feed
Download our iPhone app
TODAY'S HEADLINES  |   ARTICLE ARCHIVE  |   FORUMS  |   TIP BANK
Browse DevX
Sign up for e-mail newsletters from DevX


Tip of the Day
Language: Java, Web
Expertise: Intermediate
Oct 16, 1998

Network Programming, Simple Browser

With Java, you can easily write a client program that connects to a Web server and downloads an HTML file. You can also easily expand this simple program into a Web crawler by parsing the downloaded file, extracting the links referenced in that file, and using similar code to download the referenced files from the servers identified by those links. But be careful--you might download the whole Web onto your computer!

This program displays a specified HTML file on a specified server in raw text format:

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

class SocketHttp01{
	public static void main(String[] args){
		String server = "www.phrantic.com";//server name
		int port = 80; //http port
		try{
			Socket socket = new Socket(server,port);//get socket

			//Get input and output streams from the socket      
			BufferedReader inputStream = 
					new BufferedReader(new InputStreamReader(
							socket.getInputStream()));
			PrintWriter outputStream = 
					new PrintWriter(new OutputStreamWriter(
							socket.getOutputStream()),true);

			outputStream.println("GET /scoop/2train.htm");
			//GET a specified file

			String line = null;
			while((line = inputStream.readLine()) != null) 
				System.out.println(line);
			//Loop reading and displaying lines.

		socket.close();
		}//end try
		catch(UnknownHostException e){
			System.out.println(e);
			System.out.println(
					"Connection Failure. Are you online?");
		}//end catch UnknownHostException
		catch(IOException e){System.out.println(e);}
	}//end main
}//end class SocketHttp01
Richard G.
 
Comment and Contribute

 

 

 

 

 


(Maximum characters: 1200). You have 1200 characters left.

 

 

Sitemap
Thanks for your registration, follow us on our social networks to keep up-to-date