AMF Remoting gateway in CherryPy with PyAMF

Introduction

CherryPy 3.0+ allows you to graft any WSGI application as a controller. PyAMF's WSGI gateway can thus be used to easily expose a set of methods via AMF remoting.

Example

The following example shows how a single method is exposed in this way:

import cherrypy
from pyamf.remoting.gateway.wsgi import WSGIGateway

# This is a function that we will expose
def echo(data):
   return data

services = {
   'myservice.echo': echo,
   # Add other exposed functions here
}

# This is the root controller for the rest of the website
class Root(object):
    def index(self):
        return "This is your main website"
    index.exposed = True

config = {
    '/crossdomain.xml': {
        'tools.staticfile.on': True,
        'tools.staticfile.filename': '/path/to/crossdomain.xml'
    }
}

# This is where we hook in the WSGIGateway
cherrypy.tree.graft(WSGIGateway(services), "/gateway/")

cherrypy.quickstart(Root(), config=config)

Here is a suitable crossdomain.xml file.

Now run the script to start the web server. To test the gateway you can use a Python AMF client like this:

from pyamf.remoting.client import RemotingService

gw = RemotingService('http://localhost:8080/gateway/')
service = gw.getService('myservice')

print service.echo('Hello World!')

You can easily expose more functions by adding them to the dictionary given to WSGIGateway. You can also create a totally different controller and expose it under another gateway URL.