1.1 Uniform Resource Locators (URLs)

<..TestURL.java ..>

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

public class TestURL {
    public static void main(String[] args ) {
      for( int i=0; i<args.length; i++){
         System.out.println( "----------------------------------------" );
         System.out.println( args[i] );
         System.out.println( "----------------------------------------" );
         try{
            URL u = new URL( args[i] );
            System.out.println( "Authority: " + u.getAuthority() );
            System.out.println( "DefaultPort: " + u.getDefaultPort() );
            System.out.println( "File: " + u.getFile() );
            System.out.println( "Host: " + u.getHost() );
            System.out.println( "Path: " + u.getPath() );
            System.out.println( "Port: " + u.getPort() );
            System.out.println( "Protocol: " + u.getProtocol() );
            System.out.println( "Query: " + u.getQuery() );
            System.out.println( "Ref: " + u.getRef() );
            System.out.println( "UserInfo: " + u.getUserInfo() );
            System.out.println( "Content: " + u.getContent() );
        } catch (Exception e){ System.out.println( "error" ); }
} }  }

-_-_-

----------------------------------------
http://www.cis.ohio-state.edu:13/index.html#here
----------------------------------------
Authority: www.cis.ohio-state.edu:13
DefaultPort: 80
File: /index.html
Host: www.cis.ohio-state.edu
Path: /index.html
Port: 13
Protocol: http
Query: null
Ref: here
UserInfo: null
Content: sun.net.www.protocol.http.HttpURLConnection$HttpInputStream@6e1408
----------------------------------------
http://www.google.com/search?num=100&hl=en&lr=&ie=UTF-8&oe=UTF-8&q=foo
----------------------------------------
Authority: www.google.com
DefaultPort: 80
File: /search?num=100&hl=en&lr=&ie=UTF-8&oe=UTF-8&q=foo
Host: www.google.com
Path: /search
Port: -1
Protocol: http
Query: num=100&hl=en&lr=&ie=UTF-8&oe=UTF-8&q=foo
Ref: null
UserInfo: null
error
----------------------------------------
ftp://ftp.ohio-state.edu
----------------------------------------
Authority: ftp.ohio-state.edu
DefaultPort: 21
File:
Host: ftp.ohio-state.edu
Path:
Port: -1
Protocol: ftp
Query: null
Ref: null
UserInfo: null
error
----------------------------------------
file://localhost/n/gold/5/gurari/WWW/course/cis888w04/TestURL.java
----------------------------------------
Authority: localhost
DefaultPort: -1
File: /n/gold/5/gurari/WWW/course/cis888w04/TestURL.java
Host: localhost
Path: /n/gold/5/gurari/WWW/course/cis888w04/TestURL.java
Port: -1
Protocol: file
Query: null
Ref: null
UserInfo: null
Content: sun.net.www.content.text.PlainTextInputStream@e0be38
----------------------------------------
telnet://cis.ohio-state.edu
----------------------------------------
error
----------------------------------------
gopher://spinaltap.micro.umn.edu/00/Weather/Ohio/Columbus
----------------------------------------
Authority: spinaltap.micro.umn.edu
DefaultPort: 70
File: /00/Weather/Ohio/Columbus
Host: spinaltap.micro.umn.edu
Path: /00/Weather/Ohio/Columbus
Port: -1
Protocol: gopher
Query: null
Ref: null
UserInfo: null
error
----------------------------------------
http://www.err.ohio-state.edu/
----------------------------------------
Authority: www.err.ohio-state.edu
DefaultPort: 80
File: /
Host: www.err.ohio-state.edu
Path: /
Port: -1
Protocol: http
Query: null
Ref: null
UserInfo: null
error

protocol	host	port	file

http://www.cis.ohio-state.edu:80/index.html

http	www.cis.ohio-state.edu	80	index.html