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The Twisted Book

What is Twisted?

Twisted is an event-driven networking engine written in Python and licensed under the MIT license.

Easily Implement Custom Servers and Clients

Twisted makes it easy to implement servers. Here's a TCP server that echoes back everything that's written to it:

from twisted.internet import protocol, reactor

class Echo(protocol.Protocol):
    def dataReceived(self, data):
        self.transport.write(data)

class EchoFactory(protocol.Factory):
    def buildProtocol(self, addr):
        return Echo()

reactor.listenTCP(1234, EchoFactory())
reactor.run()

Learn more about writing servers, writing clients and the core networking libraries (SSL, scheduled events, unit testing, and more).

Scalable Web Applications

Twisted includes scalable, event-driven HTTP support. Here's a sample web application:

from twisted.web import server, resource
from twisted.internet import reactor

class HelloResource(resource.Resource):
    def render_GET(self, request):
        request.setHeader("content-type", "text/plain")
        return "Hello, world!"

reactor.listenTCP(8080, server.Site(HelloResource()))
reactor.run()

Learn more about web application development and Twisted's HTTP client.

And More!

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