How to bypass the proxy using java

Question

Here belwo is my code

import java.io.IOException;
import java.net.URL;
import java.net.URLConnection;

import javax.swing.JEditorPane;
import javax.swing.JFrame;
import javax.swing.JScrollPane;

import com.sun.org.apache.xml.internal.security.utils.Base64;

public class webpageDisplay {

    /**
     * @param args
     * @throws IOException 
     */
    public static void main(String[] args) throws IOException {
        System.getProperties().put( "proxySet", "true" ); 
        System.getProperties().put( "proxyHost", "I given proxy host" ); 
        System.getProperties().put( "proxyPort", "85" ); 
        URL url=new URL("http://www.yahoo.com");
        URLConnection uc = url.openConnection ();
        String encoded = new String
              (Base64.encode(new String("user:pass").getBytes()));
        uc.setRequestProperty("Proxy-Authorization", "Basic " + encoded);
        uc.connect();

         //String url = "http://www.yahoo.com";
            JEditorPane editor = new JEditorPane(url);
            editor.setEditable(false);
            JScrollPane pane = new JScrollPane(editor);
            JFrame f = new JFrame("HTML Demo");
            f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            f.getContentPane().add(pane);
            f.setSize(800, 600);
            f.setVisible(true);


    }

}

even though i provided proxy host and userid still iam getting erorr as below

Exception in thread "main" java.net.UnknownHostException: www.yahoo.com
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:196)
    at java.net.Socket.connect(Socket.java:530)
    at java.net.Socket.connect(Socket.java:480)
    at sun.net.NetworkClient.doConnect(NetworkClient.java:169)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:406)
    at sun.net.www.http.HttpClient.openServer(HttpClient.java:541)
    at sun.net.www.http.HttpClient.<init>(HttpClient.java:245)
    at sun.net.www.http.HttpClient.New(HttpClient.java:318)
    at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:790)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:738)
    at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:649)
    at webpageDisplay.main(webpageDisplay.java:26)

Can anyone suggest how to resolve the issue or how can i bypass the proxy

proxySet does nothing. It is an urban myth.

user207421
– user207421

2012-04-17 10:23:33 +00:00
Commented Apr 17, 2012 at 10:23 — user207421
– user207421, Commented Apr 17, 2012 at 10:23

Community · Accepted Answer · 2017-05-23 12:02:02Z

2

You need to use the properties http.proxyHost and http.proxyPort rather than just proxyHost and proxyPort.

See the following questions for example code:

How to use an HTTP proxy in java

Connect to a site using proxy code in java

edited May 23, 2017 at 12:02

CommunityBot

11 silver badge

answered Apr 17, 2012 at 6:17

Deco

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Comments

vivekv · Accepted Answer · 2012-04-17 06:36:59Z

0

You have crossed half the bridge. The way you are passing UID/pwd has to be changed

You also need a java.net.Authenticator object whose static setDefault() method has to be called to setup authentication. See here for more information

http://docs.oracle.com/javase/6/docs/technotes/guides/net/http-auth.html

answered Apr 17, 2012 at 6:36

vivekv

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Comments

Manimaran Samuthirapandi · Accepted Answer · 2017-03-31 12:40:27Z

0

System.setProperty("http.proxyHost", "132.186.192.234");
System.setProperty("http.proxyPort", "8080");
System.setProperty("https.proxyUser", "ad001\\userid");
System.setProperty("https.proxyPassword", "sect");

answered Mar 31, 2017 at 12:40

Manimaran Samuthirapandi

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