App for medical emergency charity. Anyone have a Java echo server?

[goodnewsjim]

Hello,

I found several Java socket echo servers that work well with Flash.

The problem is that when I get the <policy-file-request>, I don't know how to handle it to make Flash happy.

Does anyone have a bare bones Java echo server that can serve a cross domain policy file.

All I want to do is get "Hello World" working, and I'll be able to finish an app I'm doing pro bono for a non profit regarding medical emergencies.

I expected Cirrus to work on Android, but it didn't for me, so now I'm trying to do client<>server.  I am pretty sure client<>server will work, but I've been fighting with the cross domain policy request for 3-4 years now with no success.

,James

[goodnewsjim · Accepted solution]

Solution from Stackoverflow.com

package server; 

import java.io.BufferedReader; 

import java.io.IOException; 

import java.io.InputStreamReader; 

import java.net.ServerSocket; 

import java.net.Socket; 

public class PolicyServer { 

public static final String POLICY_XML =

        "<?xml version=\"1.0\"?>"

                + "<cross-domain-policy>"

                + "<allow-access-from domain=\"*\" to-ports=\"*\" />"

                + "</cross-domain-policy>\n";

public PolicyServer(){

    ServerSocket ss = null;

    try {

        ss = new ServerSocket(843);

    } catch (IOException e) {e.printStackTrace();}

    while(true){

        try {

            final Socket client = ss.accept();

            new Thread(new Runnable() {

                @Override

                public void run() {

                    try {

                        client.setSoTimeout(10000); //clean failed connections

                        client.getOutputStream().write(PolicyServer.POLICY_XML.getBytes());

                        client.getOutputStream().write(0x00); //write required endbit

                        client.getOutputStream().flush();

                        BufferedReader in = new BufferedReader(new InputStreamReader(client.getInputStream()));

                        //reading two lines emties flashs buffer and magically it works!

                        in.readLine();

                        in.readLine();

                    } catch (IOException e) {

                    }

                }

            }).start();

        } catch (Exception e) {}

    }

}