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#!/usr/bin/env python
"""Simple TCP Echo Server
This example shows how you can create a simple TCP Server (an Echo Service)
utilizing the builtin Socket Components that the circuits library ships with.
"""
from circuits import handler, Debugger
from circuits.net.sockets import TCPServer
class EchoServer(TCPServer):
@handler("read")
def on_read(self, sock, data):
"""Read Event Handler
This is fired by the underlying Socket Component when there has been
new data read from the connected client.
..note :: By simply returning, client/server socket components listen
to ValueChagned events (feedback) to determine if a handler
returned some data and fires a subsequent Write event with
the value returned.
"""
return data
# Start and "run" the system.
# Bind to port 0.0.0.0:8000
app = EchoServer(("0.0.0.0", 8000))
Debugger().register(app)
app.run()
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