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 Tools and Libs > Commons Http Client > How to set Custom User-Agent Header

How to set Custom User-Agent Header 

Commons Http Client is a HTTP agent implementation in java supporting client-side authentication, HTTP state management and HTTP connection management. This requires the libraries httpclient-4.1.2.jar, httpcore-4.1.2.jar, httpmime-4.1.2.jar, httpclient-cache-4.1.2.jar, commons-codec.jar and commons-logging-1.1.1.jar to be in classpath. The following example shows how to set custom user agent HTTP request header.

File Name  :  
com/bethecoder/tutorials/commons_httpclient/CustomUserAgentTest.java 
Author  :  Sudhakar KV
Email  :  kvenkatasudhakar@gmail.com
   
package com.bethecoder.tutorials.commons_httpclient;

import java.io.IOException;

import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.DefaultHttpClient;

public class CustomUserAgentTest {

  /**
   @param args
   @throws IOException 
   @throws ClientProtocolException 
   */
  public static void main(String[] argsthrows ClientProtocolException, IOException {
    HttpClient httpclient = new DefaultHttpClient();
    HttpGet httpget = new HttpGet("http://localhost:8080/HTTP_TEST_APP/print_headers.jsp");
    System.out.println("Requesting : " + httpget.getURI());

    try {
      /**
       * Set 'User-Agent' header with customized string.
       */
      httpget.addHeader("User-Agent""My Test Browser");
      
      ResponseHandler<String> responseHandler = new BasicResponseHandler();
            String responseBody = httpclient.execute(httpget, responseHandler);
            
      System.out.println("responseBody : " + responseBody);
    finally {
       httpclient.getConnectionManager().shutdown();
    }

  }

}
   

A simple Web Application which prints the request headers through JSP.

File Name  :  
/HTTP_TEST_APP/WebContent/print_headers.jsp 

It gives the following output,
File Name  :  OUTPUT


                    Print

   



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