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#!/usr/bin/python
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
# Composite deployment and integration with WSGI
from wsgiref.simple_server import make_server
from wsgiref.handlers import CGIHandler
from os import environ
from sys import stderr, argv
from util import *
from scdl import *
def requestPath(e):
return e.get("PATH_INFO", "")
def requestMethod(e):
return e.get("REQUEST_METHOD", "")
def contentType(ct):
if ct == None:
return []
return [("Content-type", ct)]
def status(st):
if st == 200:
return "200 OK"
if st == 404:
return "404 Not Found"
if st == 201:
return "201 Created"
return "500 Internal Server Error"
def result(r, st, ct = None, b = ()):
r(status(st), contentType(ct))
return b
# WSGI application function
def application(e, r):
# Read the deployed composite
comps = components(parse("domain-test.composite"))
print >> stderr, comps
# Find the requested component
path = tokens(requestPath(e))
uc = uriToComponent(path, comps)
uri = car(uc)
if uri == None:
return result(r, 404)
comp = cadr(uc)
mod = __import__(cadr(comp))
# Call the requested component function
id = path[len(uri):]
print >> stderr, id
m = requestMethod(e)
if (m == "GET"):
v = mod.get(id)
print >> stderr, v
# write returned content-type / content pair
if not isinstance(cadr(v), basestring):
return result(r, 200, car(v), cadr(v))
# TODO write an ATOM feed or entry
if nil(id):
return result(r, 200, "application/atom+xml;type=feed", ("Atom feed"))
return result(r, 200, "application/atom+xml;type=entry", ("Atom entry"))
if m == "DELETE":
v = mod.delete(id)
if v == False:
return result(r, 404)
return result(r, 200)
# TODO implement POST and PUT methods
return result(r, 500)
def serverType(e):
return e.get("SERVER_SOFTWARE", "")
# Run the WSGI application
if __name__ == "__main__":
st = serverType(environ)
if st == "":
make_server("", int(argv[1]), application).serve_forever()
else:
CGIHandler().run(application)
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