Setting user agent of a java URLConnection

Question

I'm trying to parse a webpage using Java with URLConnection. I try to set up the user-agent like this:

java.net.URLConnection c = url.openConnection(); c.setRequestProperty("User-Agent", "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.4; en-US; rv:1.9.2.2) Gecko/20100316 Firefox/3.6.2"); 

But the resulting user agent is the one I specify, with "Java/1.5.0_19" appended to the end. Is there a way to truly set the user agent without this addition?

Answer 1

Just for clarification: setRequestProperty("User-Agent", "Mozilla ...") now works just fine and doesn't append java/xx at the end! At least with Java 1.6.30 and newer.

I listened on my machine with netcat(a port listener):

$ nc -l -p 8080 

It simply listens on the port, so you see anything which gets requested, like raw http-headers.

And got the following http-headers without setRequestProperty:

GET /foobar HTTP/1.1 User-Agent: Java/1.6.0_30 Host: localhost:8080 Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2 Connection: keep-alive 

And WITH setRequestProperty:

GET /foobar HTTP/1.1 User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.4; en-US; rv:1.9.2.2) Gecko/20100316 Firefox/3.6.2 Host: localhost:8080 Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2 Connection: keep-alive 

As you can see the user agent was properly set.

Full example:

import java.io.IOException; import java.net.URL; import java.net.URLConnection;   public class TestUrlOpener {      public static void main(String[] args) throws IOException {         URL url = new URL("http://localhost:8080/foobar");         URLConnection hc = url.openConnection();         hc.setRequestProperty("User-Agent", "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.4; en-US; rv:1.9.2.2) Gecko/20100316 Firefox/3.6.2");          System.out.println(hc.getContentType());     }  }