MANGO->proxy->agent

a) I created a html control with a button that makes a local call to a proxy java (proxyProcess) by ajax

<script language="javascript">
<!--
   var myRequest = null;
   
   function CreateXmlHttpReq( handler)
                {
                          alert("create XmllHttpReq");
                          var xmlhttp = null;
                          xmlhttp = new XMLHttpRequest();
                          xmlhttp.onreadystatechange = handler;
                          return xmlhttp;
                }
   function myHandler()
                {
                        
                        if (myRequest.readyState == 4 && myRequest.status == 200)
                        {
                                alert(myRequest.responseText);
                        }
                }

   function sendRequest( operation)
                {
                        var path = '?process=snmpd&command=' + operation;
                        var urlProxy  = 'http://xxx.xxx.xxx.xxx:8080/proxyPROCESS' + path;

                        alert("sendRequest to proxy \n" + urlProxy);

            try
            {
                    myRequest = CreateXmlHttpReq(myHandler);

                        myRequest.open( 'GET', urlProxy, true);
                        myRequest.send( null);
            }
            catch(e)
            {
                  alert(e.message);
            }

                }
-->
</script>
<input type="button" value="start " onclick="sendRequest('start')" />

b) I created a servlet (positioned between the servlet Mango) proxyProcess.class that received the request makes a remote call (http://yyy.yyy.yyy.yyy/provaXMango/PROCESSI/processCommands.php?process = "+ param1 + "& command =" + param2) to the server where I want to execute the command

public class proxyPROCESS extends HttpServlet 
{
	private static final long serialVersionUID = 1L;

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException 
	{
		try
		{
			
			String param1 = request.getParameter("process");
			String param2 = request.getParameter("command");
			URL url = new URL("http://yyy.yyy.yyy.yyy/provaXMango/PROCESSI/processCommands.php?process=" + param1 + "&command=" + param2);
			HttpURLConnection conn = (HttpURLConnection)url.openConnection();
			
			int code = conn.getResponseCode();
			
			//conn.disconnect();
		} 
		catch(MalformedURLException ex) 
		{
			ex.printStackTrace();
		} 
		catch(IOException ioex) 
		{
			ioex.printStackTrace();
		}

		
	}

}

c) I created an php agent on the remote server to run command

<?php
	 
	$availableProcess = array();
	getProcess( $availableProcess);
	
	$qs = $_SERVER['QUERY_STRING'];
	$process = $_GET['process'];
	$command = $_GET['command'];
	
	
	//comando to execute
	$completeCommand = "sudo /etc/init.d/" . $process . " " . $command;
	$tmp = exec( $completeCommand, $outputs, $ret_var);	
?>

To execute commands with www user with sudo, you need to enable the www user to run the desired command in sudoers, for example

apache  yyy.yyy.yyy.yyy=NOPASSWD: /etc/init.d/snmpd

Everything works correctly!

Probably this is not the optimal solution, but it works!

Ciao

But this did give me an idea. It's not as straightforward for your needs as you might like, but i believe it will offer a lot of general power. I've added a new "process" event handler, which provides active and inactive "process command" values. "Commands" are basically shell commands. When the event is raised the active command will be executed, and vice versa.

A command could be "java -X" (although this wouldn't really be very useful for much), or "wget ...", which would be good for your situation, as long as you're using *nix. This will be available in the next release.

Ciao