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An XML-RPC Servlet

03.05.2006
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        // This depends upon the Apache XML-RPC library.

import java.io.IOException;
import java.io.OutputStream;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.xmlrpc.XmlRpcServer;

public class XmlRpcServlet extends HttpServlet {
    public class EchoHandler {
        public String echo(String input) {
            return input;
        }
    }
	
    private XmlRpcServer server = new XmlRpcServer();

    private static Log log = LogFactory.getLog(XmlRpcServlet.class);

	@Override
	public void init(ServletConfig config) throws ServletException {
        server.addHandler("echo", new EchoHandler());
	}

	@Override
	protected void doGet(HttpServletRequest request, 
			HttpServletResponse response) throws ServletException, IOException {
        doPost(request, response);
	}

	@Override
	protected void doPost(HttpServletRequest request, 
			HttpServletResponse response) throws ServletException, IOException {
        byte[] result = server.execute(request.getInputStream());
        
        response.setContentType("text/xml");
        response.setContentLength(result.length);
        
        OutputStream output = response.getOutputStream();
        output.write(result);
        output.flush();
    }
}

// The following needs to be added to your web.xml file to
// expose the servlet so it may be called remotely.
  <servlet>
    <servlet-name>XmlRpcServlet</servlet-name>
    <servlet-class>XmlRpcServlet</servlet-class>
  </servlet>

  <servlet-mapping>
    <servlet-name>XmlRpcServlet</servlet-name>
    <url-pattern>/remoteapi</url-pattern>        
  </servlet-mapping>