Is there any free java open source application that can monitor website status?

Question

Anyone know any? I need to send in a http request and make sure the http response i got back is not http 500

Answer 1

You could use httpunit - web-centric unit testing

Answer 2

I believe Hyperic HQ meets all of your criteria. It is open source, I believe it is written at least partially in Java, and it is designed to do all kinds of server monitoring.

It should be able to handle not only the kind of monitoring you requested but other necessary monitoring like memory, CPU usage, and disk space on your servers as well.

Answer 3

http-unit or html-unit.

Answer 4

If you want to do this yourself, Apache HttpClient is an option:

GetMethod get = new GetMethod("http://www.stackoverflow.com");
try
{
    int resultCode = client.executeMethod(get);
    if (resultCode == 500)
    {
     //do something meaningful here

    } // if
} // try
catch (Exception e)
{
    e.printStackTrace();
}
finally
{
    get.releaseConnection();
}

Answer 5

While you find it you can use this:

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

public class SimplisticMonitor { 

    public static void main( String [] args ) throws IOException { 

        HttpURLConnection c = ( HttpURLConnection ) 
                      new URL( "http://stackoverflow.com" ).openConnection();

        System.out.println( c.getResponseCode() );
    }
}