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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  :  
Author  :  Sudhakar KV
Email  :  [email protected]
package com.bethecoder.tutorials.commons_httpclient;


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 {



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

File Name  :  

It gives the following output,
File Name  :  OUTPUT



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