625 lines
25 KiB
Python
625 lines
25 KiB
Python
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published by the
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# Free Software Foundation; either version 3, or (at your option) any later
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# version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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# for more details.
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"""Pythonic simple SOAP Server implementation"""
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from __future__ import unicode_literals
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import sys
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if sys.version > '3':
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unicode = str
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import datetime
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import sys
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import logging
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import warnings
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import re
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import traceback
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try:
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from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer
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except ImportError:
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from http.server import BaseHTTPRequestHandler, HTTPServer
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from . import __author__, __copyright__, __license__, __version__
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from .simplexml import SimpleXMLElement, TYPE_MAP, Date, Decimal
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log = logging.getLogger(__name__)
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# Deprecated?
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NS_RX = re.compile(r'xmlns:(\w+)="(.+?)"')
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class SoapFault(Exception):
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def __init__(self, faultcode=None, faultstring=None, detail=None):
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self.faultcode = faultcode or self.__class__.__name__
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self.faultstring = faultstring or ''
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self.detail = detail
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class SoapDispatcher(object):
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"""Simple Dispatcher for SOAP Server"""
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def __init__(self, name, documentation='', action='', location='',
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namespace=None, prefix=False,
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soap_uri="http://schemas.xmlsoap.org/soap/envelope/",
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soap_ns='soap',
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namespaces={},
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pretty=False,
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debug=False,
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**kwargs):
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"""
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:param namespace: Target namespace; xmlns=targetNamespace
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:param prefix: Prefix for target namespace; xmlns:prefix=targetNamespace
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:param namespaces: Specify additional namespaces; example: {'external': 'http://external.mt.moboperator'}
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:param pretty: Prettifies generated xmls
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:param debug: Use to add tracebacks in generated xmls.
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Multiple namespaces
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===================
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It is possible to support multiple namespaces.
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You need to specify additional namespaces by passing `namespace` parameter.
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>>> dispatcher = SoapDispatcher(
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... name = "MTClientWS",
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... location = "http://localhost:8008/ws/MTClientWS",
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... action = 'http://localhost:8008/ws/MTClientWS', # SOAPAction
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... namespace = "http://external.mt.moboperator", prefix="external",
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... documentation = 'moboperator MTClientWS',
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... namespaces = {
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... 'external': 'http://external.mt.moboperator',
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... 'model': 'http://model.common.mt.moboperator'
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... },
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... ns = True)
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Now the registered method must return node names with namespaces' prefixes.
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>>> def _multi_ns_func(self, serviceMsisdn):
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... ret = {
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... 'external:activateSubscriptionsReturn': [
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... {'model:code': '0'},
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... {'model:description': 'desc'},
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... ]}
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... return ret
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Our prefixes will be changed to those used by the client.
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"""
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self.methods = {}
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self.name = name
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self.documentation = documentation
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self.action = action # base SoapAction
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self.location = location
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self.namespace = namespace # targetNamespace
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self.prefix = prefix
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self.soap_ns = soap_ns
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self.soap_uri = soap_uri
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self.namespaces = namespaces
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self.pretty = pretty
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self.debug = debug
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@staticmethod
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def _extra_namespaces(xml, ns):
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"""Extends xml with extra namespaces.
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:param ns: dict with namespaceUrl:prefix pairs
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:param xml: XML node to modify
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"""
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if ns:
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_tpl = 'xmlns:%s="%s"'
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_ns_str = " ".join([_tpl % (prefix, uri) for uri, prefix in ns.items() if uri not in xml])
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xml = xml.replace('/>', ' ' + _ns_str + '/>')
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return xml
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def register_function(self, name, fn, returns=None, args=None, doc=None, response_element_name=None):
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self.methods[name] = fn, returns, args, doc or getattr(fn, "__doc__", ""), response_element_name or '%sResponse' % name
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def response_element_name(self, method):
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return self.methods[method][4]
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def dispatch(self, xml, action=None, fault=None):
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"""Receive and process SOAP call, returns the xml"""
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# a dict can be sent in fault to expose it to the caller
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# default values:
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prefix = self.prefix
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ret = None
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if fault is None:
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fault = {}
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soap_ns, soap_uri = self.soap_ns, self.soap_uri
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soap_fault_code = 'VersionMismatch'
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name = None
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# namespaces = [('model', 'http://model.common.mt.moboperator'), ('external', 'http://external.mt.moboperator')]
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_ns_reversed = dict(((v, k) for k, v in self.namespaces.items())) # Switch keys-values
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# _ns_reversed = {'http://external.mt.moboperator': 'external', 'http://model.common.mt.moboperator': 'model'}
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try:
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request = SimpleXMLElement(xml, namespace=self.namespace)
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# detect soap prefix and uri (xmlns attributes of Envelope)
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for k, v in request[:]:
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if v in ("http://schemas.xmlsoap.org/soap/envelope/",
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"http://www.w3.org/2003/05/soap-env",
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"http://www.w3.org/2003/05/soap-envelope",):
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soap_ns = request.attributes()[k].localName
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soap_uri = request.attributes()[k].value
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# If the value from attributes on Envelope is in additional namespaces
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elif v in self.namespaces.values():
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_ns = request.attributes()[k].localName
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_uri = request.attributes()[k].value
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_ns_reversed[_uri] = _ns # update with received alias
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# Now we change 'external' and 'model' to the received forms i.e. 'ext' and 'mod'
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# After that we know how the client has prefixed additional namespaces
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ns = NS_RX.findall(xml)
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for k, v in ns:
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if v in self.namespaces.values():
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_ns_reversed[v] = k
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soap_fault_code = 'Client'
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# parse request message and get local method
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method = request('Body', ns=soap_uri).children()(0)
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if action:
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# method name = action
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name = action[len(self.action)+1:-1]
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prefix = self.prefix
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if not action or not name:
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# method name = input message name
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name = method.get_local_name()
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prefix = method.get_prefix()
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log.debug('dispatch method: %s', name)
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function, returns_types, args_types, doc, response_element_name = self.methods[name]
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log.debug('returns_types %s', returns_types)
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# de-serialize parameters (if type definitions given)
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if args_types:
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args = method.children().unmarshall(args_types)
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elif args_types is None:
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args = {'request': method} # send raw request
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else:
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args = {} # no parameters
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soap_fault_code = 'Server'
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# execute function
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ret = function(**args)
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log.debug('dispathed method returns: %s', ret)
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except SoapFault as e:
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fault.update({
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'faultcode': "%s.%s" % (soap_fault_code, e.faultcode),
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'faultstring': e.faultstring,
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'detail': e.detail
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})
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except Exception: # This shouldn't be one huge try/except
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import sys
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etype, evalue, etb = sys.exc_info()
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log.error(traceback.format_exc())
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if self.debug:
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detail = u''.join(traceback.format_exception(etype, evalue, etb))
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detail += u'\n\nXML REQUEST\n\n' + xml.decode('UTF-8')
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else:
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detail = None
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fault.update({'faultcode': "%s.%s" % (soap_fault_code, etype.__name__),
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'faultstring': evalue,
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'detail': detail})
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# build response message
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if not prefix:
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xml = """<%(soap_ns)s:Envelope xmlns:%(soap_ns)s="%(soap_uri)s"/>"""
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else:
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xml = """<%(soap_ns)s:Envelope xmlns:%(soap_ns)s="%(soap_uri)s"
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xmlns:%(prefix)s="%(namespace)s"/>"""
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xml %= { # a %= {} is a shortcut for a = a % {}
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'namespace': self.namespace,
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'prefix': prefix,
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'soap_ns': soap_ns,
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'soap_uri': soap_uri
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}
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# Now we add extra namespaces
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xml = SoapDispatcher._extra_namespaces(xml, _ns_reversed)
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# Change our namespace alias to that given by the client.
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# We put [('model', 'http://model.common.mt.moboperator'), ('external', 'http://external.mt.moboperator')]
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# mix it with {'http://external.mt.moboperator': 'ext', 'http://model.common.mt.moboperator': 'mod'}
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mapping = dict(((k, _ns_reversed[v]) for k, v in self.namespaces.items())) # Switch keys-values and change value
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# and get {'model': u'mod', 'external': u'ext'}
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response = SimpleXMLElement(xml,
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namespace=self.namespace,
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namespaces_map=mapping,
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prefix=prefix)
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response['xmlns:xsi'] = "http://www.w3.org/2001/XMLSchema-instance"
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response['xmlns:xsd'] = "http://www.w3.org/2001/XMLSchema"
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body = response.add_child("%s:Body" % soap_ns, ns=False)
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if fault:
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# generate a Soap Fault (with the python exception)
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body.marshall("%s:Fault" % soap_ns, fault, ns=False)
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else:
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# return normal value
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res = body.add_child(self.response_element_name(name), ns=self.namespace)
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if not prefix:
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res['xmlns'] = self.namespace # add target namespace
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# serialize returned values (response) if type definition available
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if returns_types:
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# TODO: full sanity check of type structure (recursive)
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complex_type = isinstance(ret, dict)
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if complex_type:
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# check if type mapping correlates with return value
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types_ok = all([k in returns_types for k in ret.keys()])
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if not types_ok:
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warnings.warn("Return value doesn't match type structure: "
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"%s vs %s" % (str(returns_types), str(ret)))
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if not complex_type or not types_ok:
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# backward compatibility for scalar and simple types
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res.marshall(list(returns_types.keys())[0], ret, )
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else:
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# new style for complex classes
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for k, v in ret.items():
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res.marshall(k, v)
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elif returns_types is None:
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# merge xmlelement returned
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res.import_node(ret)
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elif returns_types == {}:
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log.warning('Given returns_types is an empty dict.')
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return response.as_xml(pretty=self.pretty)
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# Introspection functions:
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def list_methods(self):
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"""Return a list of aregistered operations"""
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return [(method, doc) for method, (function, returns, args, doc, response_element_name) in self.methods.items()]
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def help(self, method=None):
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"""Generate sample request and response messages"""
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(function, returns, args, doc, response_element_name) = self.methods[method]
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xml = """
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<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
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<soap:Body><%(method)s xmlns="%(namespace)s"/></soap:Body>
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</soap:Envelope>""" % {'method': method, 'namespace': self.namespace}
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request = SimpleXMLElement(xml, namespace=self.namespace, prefix=self.prefix)
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if args:
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items = args.items()
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elif args is None:
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items = [('value', None)]
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else:
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items = []
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for k, v in items:
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request(method).marshall(k, v, add_comments=True, ns=False)
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xml = """
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<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
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<soap:Body><%(response_element_name)s xmlns="%(namespace)s"/></soap:Body>
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</soap:Envelope>""" % {'response_element_name': response_element_name, 'namespace': self.namespace}
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response = SimpleXMLElement(xml, namespace=self.namespace, prefix=self.prefix)
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if returns:
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items = returns.items()
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elif args is None:
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items = [('value', None)]
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else:
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items = []
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for k, v in items:
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response(response_element_name).marshall(k, v, add_comments=True, ns=False)
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return request.as_xml(pretty=True), response.as_xml(pretty=True), doc
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def wsdl(self):
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"""Generate Web Service Description v1.1"""
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xml = """<?xml version="1.0"?>
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<wsdl:definitions name="%(name)s"
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targetNamespace="%(namespace)s"
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xmlns:tns="%(namespace)s"
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xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
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xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"
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xmlns:xsd="http://www.w3.org/2001/XMLSchema">
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<wsdl:documentation xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/">%(documentation)s</wsdl:documentation>
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<wsdl:types>
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<xsd:schema targetNamespace="%(namespace)s"
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elementFormDefault="qualified"
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xmlns:xsd="http://www.w3.org/2001/XMLSchema">
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</xsd:schema>
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</wsdl:types>
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</wsdl:definitions>
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""" % {'namespace': self.namespace, 'name': self.name, 'documentation': self.documentation}
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wsdl = SimpleXMLElement(xml)
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for method, (function, returns, args, doc, response_element_name) in self.methods.items():
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# create elements:
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def parse_element(name, values, array=False, complex=False):
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if not complex:
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element = wsdl('wsdl:types')('xsd:schema').add_child('xsd:element')
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complex = element.add_child("xsd:complexType")
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else:
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complex = wsdl('wsdl:types')('xsd:schema').add_child('xsd:complexType')
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element = complex
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element['name'] = name
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if values:
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items = values
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elif values is None:
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items = [('value', None)]
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else:
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items = []
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if not array and items:
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all = complex.add_child("xsd:all")
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elif items:
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all = complex.add_child("xsd:sequence")
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for k, v in items:
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e = all.add_child("xsd:element")
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e['name'] = k
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if array:
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e[:] = {'minOccurs': "0", 'maxOccurs': "unbounded"}
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if v in TYPE_MAP.keys():
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t = 'xsd:%s' % TYPE_MAP[v]
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elif v is None:
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t = 'xsd:anyType'
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elif isinstance(v, list):
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n = "ArrayOf%s%s" % (name, k)
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l = []
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for d in v:
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l.extend(d.items())
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parse_element(n, l, array=True, complex=True)
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t = "tns:%s" % n
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elif isinstance(v, dict):
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n = "%s%s" % (name, k)
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parse_element(n, v.items(), complex=True)
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t = "tns:%s" % n
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else:
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raise TypeError("unknonw type %s for marshalling" % str(v))
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e.add_attribute('type', t)
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parse_element("%s" % method, args and args.items())
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parse_element(response_element_name, returns and returns.items())
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# create messages:
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for m, e in ('Input', method), ('Output', response_element_name):
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message = wsdl.add_child('wsdl:message')
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message['name'] = "%s%s" % (method, m)
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part = message.add_child("wsdl:part")
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part[:] = {'name': 'parameters',
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'element': 'tns:%s' % e}
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# create ports
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portType = wsdl.add_child('wsdl:portType')
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portType['name'] = "%sPortType" % self.name
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for method, (function, returns, args, doc, response_element_name) in self.methods.items():
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op = portType.add_child('wsdl:operation')
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op['name'] = method
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if doc:
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op.add_child("wsdl:documentation", doc)
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input = op.add_child("wsdl:input")
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input['message'] = "tns:%sInput" % method
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output = op.add_child("wsdl:output")
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output['message'] = "tns:%sOutput" % method
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# create bindings
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binding = wsdl.add_child('wsdl:binding')
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binding['name'] = "%sBinding" % self.name
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binding['type'] = "tns:%sPortType" % self.name
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soapbinding = binding.add_child('soap:binding')
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soapbinding['style'] = "document"
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soapbinding['transport'] = "http://schemas.xmlsoap.org/soap/http"
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for method in self.methods.keys():
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op = binding.add_child('wsdl:operation')
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op['name'] = method
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soapop = op.add_child('soap:operation')
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soapop['soapAction'] = self.action + method
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soapop['style'] = 'document'
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input = op.add_child("wsdl:input")
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##input.add_attribute('name', "%sInput" % method)
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soapbody = input.add_child("soap:body")
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soapbody["use"] = "literal"
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output = op.add_child("wsdl:output")
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##output.add_attribute('name', "%sOutput" % method)
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soapbody = output.add_child("soap:body")
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soapbody["use"] = "literal"
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service = wsdl.add_child('wsdl:service')
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service["name"] = "%sService" % self.name
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service.add_child('wsdl:documentation', text=self.documentation)
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port = service.add_child('wsdl:port')
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port["name"] = "%s" % self.name
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port["binding"] = "tns:%sBinding" % self.name
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soapaddress = port.add_child('soap:address')
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soapaddress["location"] = self.location
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return wsdl.as_xml(pretty=True)
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class SOAPHandler(BaseHTTPRequestHandler):
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def do_GET(self):
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"""User viewable help information and wsdl"""
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args = self.path[1:].split("?")
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if self.path != "/" and args[0] not in self.server.dispatcher.methods.keys():
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self.send_error(404, "Method not found: %s" % args[0])
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else:
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if self.path == "/":
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# return wsdl if no method supplied
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response = self.server.dispatcher.wsdl()
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else:
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# return supplied method help (?request or ?response messages)
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req, res, doc = self.server.dispatcher.help(args[0])
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if len(args) == 1 or args[1] == "request":
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response = req
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else:
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response = res
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self.send_response(200)
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self.send_header("Content-type", "text/xml")
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self.end_headers()
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self.wfile.write(response)
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def do_POST(self):
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"""SOAP POST gateway"""
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request = self.rfile.read(int(self.headers.get('content-length')))
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# convert xml request to unicode (according to request headers)
|
|
if sys.version < '3':
|
|
encoding = self.headers.getparam("charset")
|
|
else:
|
|
encoding = self.headers.get_param("charset")
|
|
request = request.decode(encoding)
|
|
fault = {}
|
|
# execute the method
|
|
response = self.server.dispatcher.dispatch(request, fault=fault)
|
|
# check if fault dict was completed (faultcode, faultstring, detail)
|
|
if fault:
|
|
self.send_response(500)
|
|
else:
|
|
self.send_response(200)
|
|
self.send_header("Content-type", "text/xml")
|
|
self.end_headers()
|
|
self.wfile.write(response)
|
|
|
|
|
|
class WSGISOAPHandler(object):
|
|
|
|
def __init__(self, dispatcher):
|
|
self.dispatcher = dispatcher
|
|
|
|
def __call__(self, environ, start_response):
|
|
return self.handler(environ, start_response)
|
|
|
|
def handler(self, environ, start_response):
|
|
if environ['REQUEST_METHOD'] == 'GET':
|
|
return self.do_get(environ, start_response)
|
|
elif environ['REQUEST_METHOD'] == 'POST':
|
|
return self.do_post(environ, start_response)
|
|
else:
|
|
start_response('405 Method not allowed', [('Content-Type', 'text/plain')])
|
|
return ['Method not allowed']
|
|
|
|
def do_get(self, environ, start_response):
|
|
path = environ.get('PATH_INFO').lstrip('/')
|
|
query = environ.get('QUERY_STRING')
|
|
if path != "" and path not in self.dispatcher.methods.keys():
|
|
start_response('404 Not Found', [('Content-Type', 'text/plain')])
|
|
return ["Method not found: %s" % path]
|
|
elif path == "":
|
|
# return wsdl if no method supplied
|
|
response = self.dispatcher.wsdl()
|
|
else:
|
|
# return supplied method help (?request or ?response messages)
|
|
req, res, doc = self.dispatcher.help(path)
|
|
if len(query) == 0 or query == "request":
|
|
response = req
|
|
else:
|
|
response = res
|
|
start_response('200 OK', [('Content-Type', 'text/xml'), ('Content-Length', str(len(response)))])
|
|
return [response]
|
|
|
|
def do_post(self, environ, start_response):
|
|
length = int(environ['CONTENT_LENGTH'])
|
|
request = environ['wsgi.input'].read(length)
|
|
response = self.dispatcher.dispatch(request)
|
|
start_response('200 OK', [('Content-Type', 'text/xml'), ('Content-Length', str(len(response)))])
|
|
return [response]
|
|
|
|
|
|
if __name__ == "__main__":
|
|
|
|
dispatcher = SoapDispatcher(
|
|
name="PySimpleSoapSample",
|
|
location="http://localhost:8008/",
|
|
action='http://localhost:8008/', # SOAPAction
|
|
namespace="http://example.com/pysimplesoapsamle/", prefix="ns0",
|
|
documentation='Example soap service using PySimpleSoap',
|
|
trace=True, debug=True,
|
|
ns=True)
|
|
|
|
def adder(p, c, dt=None):
|
|
"""Add several values"""
|
|
dt = dt + datetime.timedelta(365)
|
|
return {'ab': p['a'] + p['b'], 'dd': c[0]['d'] + c[1]['d'], 'dt': dt}
|
|
|
|
def dummy(in0):
|
|
"""Just return input"""
|
|
return in0
|
|
|
|
def echo(request):
|
|
"""Copy request->response (generic, any type)"""
|
|
return request.value
|
|
|
|
dispatcher.register_function(
|
|
'Adder', adder,
|
|
returns={'AddResult': {'ab': int, 'dd': unicode, 'dt': datetime.date}},
|
|
args={'p': {'a': int, 'b': int}, 'dt': Date, 'c': [{'d': Decimal}]}
|
|
)
|
|
|
|
dispatcher.register_function(
|
|
'Dummy', dummy,
|
|
returns={'out0': str},
|
|
args={'in0': str}
|
|
)
|
|
|
|
dispatcher.register_function('Echo', echo)
|
|
|
|
if '--local' in sys.argv:
|
|
|
|
wsdl = dispatcher.wsdl()
|
|
|
|
for method, doc in dispatcher.list_methods():
|
|
request, response, doc = dispatcher.help(method)
|
|
|
|
if '--serve' in sys.argv:
|
|
log.info("Starting server...")
|
|
httpd = HTTPServer(("", 8008), SOAPHandler)
|
|
httpd.dispatcher = dispatcher
|
|
httpd.serve_forever()
|
|
|
|
if '--wsgi-serve' in sys.argv:
|
|
log.info("Starting wsgi server...")
|
|
from wsgiref.simple_server import make_server
|
|
application = WSGISOAPHandler(dispatcher)
|
|
wsgid = make_server('', 8008, application)
|
|
wsgid.serve_forever()
|
|
|
|
if '--consume' in sys.argv:
|
|
from .client import SoapClient
|
|
client = SoapClient(
|
|
location="http://localhost:8008/",
|
|
action='http://localhost:8008/', # SOAPAction
|
|
namespace="http://example.com/sample.wsdl",
|
|
soap_ns='soap',
|
|
trace=True,
|
|
ns="ns0",
|
|
)
|
|
p = {'a': 1, 'b': 2}
|
|
c = [{'d': '1.20'}, {'d': '2.01'}]
|
|
response = client.Adder(p=p, dt='2010-07-24', c=c)
|
|
result = response.AddResult
|
|
log.info(int(result.ab))
|
|
log.info(str(result.dd))
|
|
|
|
if '--consume-wsdl' in sys.argv:
|
|
from .client import SoapClient
|
|
client = SoapClient(
|
|
wsdl="http://localhost:8008/",
|
|
)
|
|
p = {'a': 1, 'b': 2}
|
|
c = [{'d': '1.20'}, {'d': '2.01'}]
|
|
dt = datetime.date.today()
|
|
response = client.Adder(p=p, dt=dt, c=c)
|
|
result = response['AddResult']
|
|
log.info(int(result['ab']))
|
|
log.info(str(result['dd']))
|
|
|