import SocketServer
import subprocess
import sys

class MyRequestHandler(SocketServer.StreamRequestHandler):
    def handle(self):
        print >>sys.stderr, repr(self.rfile), self.rfile._sock
        print >>sys.stderr, repr(self.wfile), self.wfile._sock
        s = subprocess.Popen(['echo','Hallo Client'],
                             stdin=self.rfile,
                             stdout=self.wfile,
                             stderr=None,
                         )
        s.wait()

if sys.argv[1:]:
    port = int(sys.argv[1])
else:
    port = 8000
server_address = ('', port)

SocketServer.TCPServer.allow_reuse_address = True
d = SocketServer.TCPServer(server_address, MyRequestHandler)
print "Serving on %s port %s ..." % d.socket.getsockname()

# handle one request only
d.handle_request()
d.server_close()