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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
This example demonstrates how to render the output of a system process to a
twisted web server.
In order to run this, you need to have fortune installed. Fortune is a simple
game that displays a random message from a database of quotations. You will need
to change the path of the fortune program if it's not in the "/usr/game"
directory.
To test the script, copy fortune.rpy to any
directory, let's say /var/www/html/
Now, start your Twisted web server:
$ twistd -n web --path /var/www/html/
And visit http://127.0.0.1:8080/fortune.rpy with a web browser.
"""
from twisted.web.resource import Resource
from twisted.web import server
from twisted.internet import utils
class FortuneResource(Resource):
"""
This resource will only respond to HEAD & GET requests.
"""
# Link your fortune program to /usr/games or change the path.
fortune = "/usr/games/fortune"
def render_GET(self, request):
"""
Get a fortune and serve it as the response to this request.
Use L{utils.getProcessOutput}, which spawns a process and returns a
Deferred which fires with its output.
"""
request.write(b"<pre>\n")
deferred = utils.getProcessOutput(self.fortune)
deferred.addCallback(lambda s: (request.write(s + b"\n"), request.finish()))
deferred.addErrback(
lambda s: (request.write(str(s).encode("utf8")), request.finish())
)
return server.NOT_DONE_YET
resource = FortuneResource()
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