How to set custom User-Agent with apache http client library 4.1?

Question

How to make HTTPClient use custom User-Agent header?

The following code submits empty user-agent. What am I missing?

import java.io.IOException;

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Answer 1

The line

request.setHeader("User-Agent", "MySuperUserAgent");

is missing. Add it and enjoy.

Answer 2

With httpcomponents 4.3 you should use the client builder to set the user agent:

HttpClient httpClient = HttpClients.custom()
                            .setUserAgent("my UserAgent 5.0")
                            .build();

httpClient.execute(new HttpGet("http://www.google.de"));

Answer 3

You can also set a global user agent value instead of per request:

String userAgent = "NewUseAgent/1.0";
HttpClient httpClient = new DefaultHttpClient();
httpclient.getParams().setParameter(CoreProtocolPNames.USER_AGENT, userAgent);