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#!/usr/bin/env python
# encoding: utf8
#
# Copyright © Burak Arslan <burak at arskom dot com dot tr>,
# Arskom Ltd. http://www.arskom.com.tr
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# 3. Neither the name of the owner nor the names of its contributors may be
# used to endorse or promote products derived from this software without
# specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY DIRECT,
# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
# OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
"""
This example shows how to define and use complex structures
in spyne. This example uses an extremely simple in-memory
dictionary to store the User objects.
"""
import logging
import random
from spyne import Application, rpc, Array, ComplexModel, Integer, String, \
Service, ResourceNotFoundError
from spyne.protocol.http import HttpRpc
from spyne.protocol.xml import XmlDocument
from spyne.server.wsgi import WsgiApplication
user_database = {}
userid_seq = 1
chars = [chr(i) for i in range(ord('a'), ord('z'))]
def randchars(n):
return ''.join(random.choice(chars) for _ in range(n))
class Permission(ComplexModel):
__namespace__ = "permission"
app = String(values=['library', 'delivery', 'accounting'])
perms = String(min_occurs=1, max_occurs=2, values=['read', 'write'])
class User(ComplexModel):
__namespace__ = "user"
userid = Integer
username = String
firstname = String
lastname = String
permissions = Array(Permission)
# add superuser to the 'database'
all_permissions = (
Permission(app='library', perms=['read', 'write']),
Permission(app='delivery', perms=['read', 'write']),
Permission(app='accounting', perms=['read', 'write']),
)
def randperms(n):
for p in random.sample(all_permissions, n):
yield Permission(app=p.app,
perms=random.sample(p.perms, random.randint(1, 2)))
user_database[0] = User(
userid=0,
username='root',
firstname='Super',
lastname='User',
permissions=all_permissions
)
def add_user(user):
global user_database
global userid_seq
user.userid = userid_seq
userid_seq = userid_seq + 1
user_database[user.userid] = user
class UserManager(Service):
@rpc(User, _returns=Integer)
def add_user(ctx, user):
add_user(user)
return user.userid
@rpc(_returns=User)
def super_user(ctx):
return user_database[0]
@rpc(_returns=User)
def random_user(ctx):
retval = User(
username=randchars(random.randrange(3, 12)),
firstname=randchars(random.randrange(3, 12)).title(),
lastname=randchars(random.randrange(3, 12)).title(),
permissions=randperms(random.randint(1, len(all_permissions)))
)
add_user(retval)
return retval
@rpc(Integer, _returns=User)
def get_user(ctx, userid):
global user_database
# If you rely on dict lookup raising KeyError here, you'll return an
# internal error to the client, which tells the client that there's
# something wrong in the server. However in this case, KeyError means
# invalid request, so it's best to return a client error.
# For the HttpRpc case, internal error is 500 whereas
# ResourceNotFoundError is 404.
if not (userid in user_database):
raise ResourceNotFoundError(userid)
return user_database[userid]
@rpc(User)
def modify_user(ctx, user):
global user_database
if not (user.userid in user_database):
raise ResourceNotFoundError(user.userid)
user_database[user.userid] = user
@rpc(Integer)
def delete_user(ctx, userid):
global user_database
if not (userid in user_database):
raise ResourceNotFoundError(userid)
del user_database[userid]
@rpc(_returns=Array(User))
def list_users(ctx):
global user_database
return user_database.values()
if __name__ == '__main__':
from wsgiref.simple_server import make_server
logging.basicConfig(level=logging.DEBUG)
logging.getLogger('spyne.protocol.xml').setLevel(logging.DEBUG)
application = Application([UserManager], 'spyne.examples.complex',
in_protocol=HttpRpc(), out_protocol=XmlDocument())
server = make_server('127.0.0.1', 8000, WsgiApplication(application))
logging.info("listening to http://127.0.0.1:8000")
logging.info("wsdl is at: http://localhost:8000/?wsdl")
server.serve_forever()
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