#!/usr/pkg/bin/python2.7
# -*- coding: latin-1 -*-
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by the
# Free Software Foundation; either version 3, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY
# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
# for more details.

"Pythonic simple SOAP Client implementation"

__author__ = "Mariano Reingart (reingart@gmail.com)"
__copyright__ = "Copyright (C) 2008 Mariano Reingart"
__license__ = "LGPL 3.0"
__version__ = "1.05a"

TIMEOUT = 60

import hashlib
import os
import cPickle as pickle
import urllib2
from urlparse import urlparse
import tempfile
from simplexml import SimpleXMLElement, TYPE_MAP, REVERSE_TYPE_MAP, OrderedDict
from transport import get_http_wrapper, set_http_wrapper, get_Http
import logging

log = logging.getLogger(__name__)
logging.basicConfig(format='%(levelname)s:%(message)s', level=logging.WARNING)


class SoapFault(RuntimeError):
    def __init__(self,faultcode,faultstring):
        self.faultcode = faultcode
        self.faultstring = faultstring
        RuntimeError.__init__(self, faultcode, faultstring)

    def __str__(self):
        return self.__unicode__().encode("ascii", "ignore")

    def __unicode__(self):
        return u'%s: %s' % (self.faultcode, self.faultstring)

    def __repr__(self):
        return u"SoapFault(%s, %s)" % (repr(self.faultcode), 
                                       repr(self.faultstring))


# soap protocol specification & namespace
soap_namespaces = dict(
    soap11="http://schemas.xmlsoap.org/soap/envelope/",
    soap="http://schemas.xmlsoap.org/soap/envelope/",
    soapenv="http://schemas.xmlsoap.org/soap/envelope/",
    soap12="http://www.w3.org/2003/05/soap-env",
)


class SoapClient(object):
    "Simple SOAP Client (simil PHP)"
    def __init__(self, location = None, action = None, namespace = None,
                 cert = None, trace = False, exceptions = True, proxy = None, ns=False, 
                 soap_ns=None, wsdl = None, cache = False, cacert=None,
                 sessions=False, soap_server=None,
                 ):
        self.certssl = cert             
        self.keyssl = None              
        self.location = location        # server location (url)
        self.action = action            # SOAP base action
        self.namespace = namespace      # message 
        self.trace = trace              # show debug messages
        self.exceptions = exceptions    # lanzar execpiones? (Soap Faults)
        self.xml_request = self.xml_response = ''
        if not soap_ns and not ns:
            self.__soap_ns = 'soap' # 1.1
        elif not soap_ns and ns:
            self.__soap_ns = 'soapenv' # 1.2
        else:
            self.__soap_ns = soap_ns
        
        # SOAP Server (special cases like oracle or jbossas6)
        self.__soap_server = soap_server
        
        # SOAP Header support
        self.__headers = {}         # general headers
        self.__call_headers = None  # OrderedDict to be marshalled for RPC Call
        
        # check if the Certification Authority Cert is a string and store it
        if cacert and cacert.startswith("-----BEGIN CERTIFICATE-----"):
            fd, filename = tempfile.mkstemp()
            f = os.fdopen(fd, 'w+b', -1)
            if self.trace: log.info(u"Saving CA certificate to %s" % filename)
            f.write(cacert)
            cacert = filename
            f.close()
        self.cacert = cacert

        # Create HTTP wrapper
        Http = get_Http()
        self.http = Http(timeout=TIMEOUT, cacert=cacert, proxy=proxy, sessions=sessions)
        
        # parse wsdl url
        self.services = wsdl and self.wsdl_parse(wsdl, debug=trace, cache=cache) 
        self.service_port = None                 # service port for late binding
        
        self.__ns = ns # namespace prefix or False to not use it
        if not ns:
            self.__xml = """<?xml version="1.0" encoding="UTF-8"?> 
<%(soap_ns)s:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
    xmlns:%(soap_ns)s="%(soap_uri)s">
<%(soap_ns)s:Header/>
<%(soap_ns)s:Body>
    <%(method)s xmlns="%(namespace)s">
    </%(method)s>
</%(soap_ns)s:Body>
</%(soap_ns)s:Envelope>"""
        else:
            self.__xml = """<?xml version="1.0" encoding="UTF-8"?>
<%(soap_ns)s:Envelope xmlns:%(soap_ns)s="%(soap_uri)s" xmlns:%(ns)s="%(namespace)s">
<%(soap_ns)s:Header/>
<%(soap_ns)s:Body>
    <%(ns)s:%(method)s>
    </%(ns)s:%(method)s>
</%(soap_ns)s:Body>
</%(soap_ns)s:Envelope>"""

        # parse wsdl url
        self.services = wsdl and self.wsdl_parse(wsdl, debug=trace, cache=cache) 
        self.service_port = None                 # service port for late binding

    def __getattr__(self, attr):
        "Return a pseudo-method that can be called"
        if not self.services: # not using WSDL?
            return lambda self=self, *args, **kwargs: self.call(attr,*args,**kwargs)
        else: # using WSDL:
            return lambda *args, **kwargs: self.wsdl_call(attr,*args,**kwargs)
        
    def call(self, method, *args, **kwargs):
        "Prepare xml request and make SOAP call, returning a SimpleXMLElement"                
        #TODO: method != input_message
        # Basic SOAP request:
        xml = self.__xml % dict(method=method, namespace=self.namespace, ns=self.__ns,
                                soap_ns=self.__soap_ns, soap_uri=soap_namespaces[self.__soap_ns])
        request = SimpleXMLElement(xml,namespace=self.__ns and self.namespace, prefix=self.__ns)
        # serialize parameters
        if kwargs:
            parameters = kwargs.items()
        else:
            parameters = args
        if parameters and isinstance(parameters[0], SimpleXMLElement):
            # merge xmlelement parameter ("raw" - already marshalled)
            for param in parameters[0].children():
                getattr(request,method).import_node(param)
        elif parameters:
            # marshall parameters:
            for k,v in parameters: # dict: tag=valor
                getattr(request,method).marshall(k,v)
        elif not self.__soap_server in ('oracle', ) or self.__soap_server in ('jbossas6',):
            # JBossAS-6 requires no empty method parameters!
            delattr(request("Body", ns=soap_namespaces.values(),), method)
        # construct header and parameters (if not wsdl given) except wsse
        if self.__headers and not self.services:
            self.__call_headers = dict([(k, v) for k, v in self.__headers.items()
                                        if not k.startswith("wsse:")])
        # always extract WS Security header and send it
        if 'wsse:Security' in self.__headers:
            #TODO: namespaces too hardwired, clean-up...
            header = request('Header' , ns=soap_namespaces.values(),)
            k = 'wsse:Security'
            v = self.__headers[k]
            header.marshall(k, v, ns=False, add_children_ns=False)
            header(k)['xmlns:wsse'] = 'http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd'
            #<wsse:UsernameToken xmlns:wsu='http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd'> 
        if self.__call_headers:
            header = request('Header' , ns=soap_namespaces.values(),)
            for k, v in self.__call_headers.items():
                ##if not self.__ns:
                ##    header['xmlns']
                header.marshall(k, v, ns=self.__ns, add_children_ns=False)
        self.xml_request = request.as_xml()
        self.xml_response = self.send(method, self.xml_request)
        response = SimpleXMLElement(self.xml_response, namespace=self.namespace)
        if self.exceptions and response("Fault", ns=soap_namespaces.values(), error=False):
            raise SoapFault(unicode(response.faultcode), unicode(response.faultstring))
        return response
    
    def send(self, method, xml):
        "Send SOAP request using HTTP"
        if self.location == 'test': return
        location = "%s" % self.location #?op=%s" % (self.location, method)
        if self.services:
            soap_action = self.action 
        else:
            soap_action = self.action+method
        headers={
                'Content-type': 'text/xml; charset="UTF-8"',
                'Content-length': str(len(xml)),
                "SOAPAction": "\"%s\"" % (soap_action)
                }
        log.info("POST %s" % location)
        if self.trace:
            print "-"*80
            print "POST %s" % location
            print '\n'.join(["%s: %s" % (k,v) for k,v in headers.items()])
            print u"\n%s" % xml.decode("utf8","ignore")
        response, content = self.http.request(
            location,"POST", body=xml, headers=headers )
        self.response = response
        self.content = content
        if self.trace: 
            print '\n'.join(["%s: %s" % (k,v) for k,v in response.items()])
            print content#.decode("utf8","ignore")
            print "="*80
        return content

    def get_operation(self, method):
        # try to find operation in wsdl file
        soap_ver = self.__soap_ns == 'soap12' and 'soap12' or 'soap11'
        if not self.service_port:
            for service_name, service in self.services.items():
                for port_name, port in [port for port in service['ports'].items()]:
                    if port['soap_ver'] == soap_ver:
                        self.service_port = service_name, port_name
                        break
                else:
                    raise RuntimeError("Cannot determine service in WSDL: "
                                       "SOAP version: %s" % soap_ver)
        else:
            port = self.services[self.service_port[0]]['ports'][self.service_port[1]]
        self.location = port['location']
        operation = port['operations'].get(unicode(method))
        if not operation:
            raise RuntimeError("Operation %s not found in WSDL: "
                               "Service/Port Type: %s" %
                               (method, self.service_port))
        return operation
    
    def wsdl_call(self, method, *args, **kwargs):
        "Pre and post process SOAP call, input and output parameters using WSDL"
        soap_uri = soap_namespaces[self.__soap_ns]
        operation = self.get_operation(method)
        # get i/o type declarations:
        input = operation['input']
        output = operation['output']
        header = operation.get('header')
        if 'action' in operation:
            self.action = operation['action']
        # sort parameters (same order as xsd:sequence)
        def sort_dict(od, d):
            if isinstance(od, dict):
                ret = OrderedDict()
                for k in od.keys():
                    v = d.get(k)
                    # don't append null tags!
                    if v is not None:
                        if isinstance(v, dict):
                            v = sort_dict(od[k], v)
                        elif isinstance(v, list):
                            v = [sort_dict(od[k][0], v1) 
                                    for v1 in v]
                        ret[str(k)] = v 
                return ret
            else:
                return d
        # construct header and parameters
        if header:
            self.__call_headers = sort_dict(header, self.__headers)
        if input and args:
            # convert positional parameters to named parameters:
            d = [(k, arg) for k, arg in zip(input.values()[0].keys(), args)]
            kwargs.update(dict(d))
        if input and kwargs:
            params = sort_dict(input.values()[0], kwargs).items()
            if self.__soap_server == "axis":
                # use the operation name
                method = method
            else:
                # use the message (element) name
                method = input.keys()[0]
        #elif not input:
            #TODO: no message! (see wsmtxca.dummy) 
        else:
            params = kwargs and kwargs.items()
        # call remote procedure
        response = self.call(method, *params)
        # parse results:
        resp = response('Body',ns=soap_uri).children().unmarshall(output)
        return resp and resp.values()[0] # pass Response tag children

    def help(self, method):
        "Return operation documentation and invocation/returned value example"
        operation = self.get_operation(method)
        input = operation['input']
        input = input and input.values() and input.values()[0]
        if isinstance(input, dict):
            input = ", ".join("%s=%s" % (k,repr(v)) for k,v 
                                 in input.items())
        elif isinstance(input, list):
            input = repr(input)
        output = operation['output'].values()[0]
        headers = operation.get('headers') or None
        return u"%s(%s)\n -> %s:\n\n%s\nHeaders: %s" % (
            method, 
            input or "",
            output and output or "",
            operation.get("documentation",""),
            headers,
            )

    def wsdl_parse(self, url, debug=False, cache=False):
        "Parse Web Service Description v1.1"

        log.debug("wsdl url: %s" % url)
        # Try to load a previously parsed wsdl:
        force_download = False
        if cache:
            # make md5 hash of the url for caching... 
            filename_pkl = "%s.pkl" % hashlib.md5(url).hexdigest()
            if isinstance(cache, basestring):
                filename_pkl = os.path.join(cache, filename_pkl) 
            if os.path.exists(filename_pkl):
                log.debug("Unpickle file %s" % (filename_pkl, ))
                f = open(filename_pkl, "r")
                pkl = pickle.load(f)
                f.close()
                # sanity check:
                if pkl['version'][:-1] != __version__.split(" ")[0][:-1] or pkl['url'] != url:
                    import warnings
                    warnings.warn('version or url mismatch! discarding cached wsdl', RuntimeWarning) 
                    if debug:
                        log.debug('Version: %s %s' % (pkl['version'], __version__))
                        log.debug('URL: %s %s' % (pkl['url'], url))
                    force_download = True
                else:
                    self.namespace = pkl['namespace']
                    self.documentation = pkl['documentation']
                    return pkl['services']
        
        soap_ns = {
            "http://schemas.xmlsoap.org/wsdl/soap/": 'soap11',
            "http://schemas.xmlsoap.org/wsdl/soap12/": 'soap12',
            }
        wsdl_uri="http://schemas.xmlsoap.org/wsdl/"
        xsd_uri="http://www.w3.org/2001/XMLSchema"
        xsi_uri="http://www.w3.org/2001/XMLSchema-instance"
        
        get_local_name = lambda s: s and str((':' in s) and s.split(':')[1] or s)
        get_namespace_prefix = lambda s: s and str((':' in s) and s.split(':')[0] or None)
        
        # always return an unicode object:
        REVERSE_TYPE_MAP[u'string'] = unicode

        def fetch(url):
            "Download a document from a URL, save it locally if cache enabled"
            
            # check / append a valid schema if not given:
            o = urlparse(url)
            if not o.scheme in ('http','https', 'file'):
                for scheme in ('http','https', 'file'):
                    try:
                        if not url.startswith("/") and scheme in ('http', 'https'):
                            tmp_url = "%s://%s" % (scheme, url)
                        else:
                            tmp_url = "%s:%s" % (scheme, url)
                        if debug: log.debug("Scheme not found, trying %s" % scheme)
                        return fetch(tmp_url)
                    except Exception, e:
                        log.error(e)
                raise RuntimeError("No scheme given for url: %s" % url)

            # make md5 hash of the url for caching... 
            filename = "%s.xml" % hashlib.md5(url).hexdigest()
            if isinstance(cache, basestring):
                filename = os.path.join(cache, filename) 
            if cache and os.path.exists(filename) and not force_download:
                log.info("Reading file %s" % (filename, ))
                f = open(filename, "r")
                xml = f.read()
                f.close()
            else:
                if o.scheme == 'file':
                    log.info("Fetching url %s using urllib2" % (url, ))
                    f = urllib2.urlopen(url)
                    xml = f.read()
                else:
                    log.info("GET %s using %s" % (url, self.http._wrapper_version))
                    response, xml = self.http.request(url, "GET", None, {})
                if cache:
                    log.info("Writing file %s" % (filename, ))
                    if not os.path.isdir(cache):
                        os.makedirs(cache)
                    f = open(filename, "w")
                    f.write(xml)
                    f.close()
            return xml
        
        # Open uri and read xml:
        xml = fetch(url)
        # Parse WSDL XML:
        wsdl = SimpleXMLElement(xml, namespace=wsdl_uri)

        # detect soap prefix and uri (xmlns attributes of <definitions>)
        xsd_ns = None
        soap_uris = {}
        for k, v in wsdl[:]:
            if v in soap_ns and k.startswith("xmlns:"):
                soap_uris[get_local_name(k)] = v
            if v== xsd_uri and k.startswith("xmlns:"):
                xsd_ns = get_local_name(k)

        # Extract useful data:
        self.namespace = wsdl['targetNamespace']
        self.documentation = unicode(wsdl('documentation', error=False) or '')
        
        services = {}
        bindings = {}           # binding_name: binding
        operations = {}         # operation_name: operation
        port_type_bindings = {} # port_type_name: binding
        messages = {}           # message: element
        elements = {}           # element: type def
        
        for service in wsdl.service:
            service_name=service['name']
            if not service_name:
                continue # empty service?
            if debug: log.debug("Processing service %s" % service_name)
            serv = services.setdefault(service_name, {'ports': {}})
            serv['documentation']=service['documentation'] or ''
            for port in service.port:
                binding_name = get_local_name(port['binding'])
                address = port('address', ns=soap_uris.values(), error=False)
                location = address and address['location'] or None
                soap_uri = address and soap_uris.get(address.get_prefix())
                soap_ver = soap_uri and soap_ns.get(soap_uri)
                bindings[binding_name] = {'service_name': service_name,
                    'location': location,
                    'soap_uri': soap_uri, 'soap_ver': soap_ver,
                    }
                serv['ports'][port['name']] = bindings[binding_name]
             
        for binding in wsdl.binding:
            binding_name = binding['name']
            if debug: log.debug("Processing binding %s" % service_name)
            soap_binding = binding('binding', ns=soap_uris.values(), error=False)
            transport = soap_binding and soap_binding['transport'] or None
            port_type_name = get_local_name(binding['type'])
            bindings[binding_name].update({
                'port_type_name': port_type_name,
                'transport': transport, 'operations': {},
                })
            port_type_bindings[port_type_name] = bindings[binding_name]
            for operation in binding.operation:
                op_name = operation['name']
                op = operation('operation',ns=soap_uris.values(), error=False)
                action = op and op['soapAction']
                d = operations.setdefault(op_name, {})
                bindings[binding_name]['operations'][op_name] = d
                d.update({'name': op_name})
                d['parts'] = {}
                body = operation.input('body', ns=soap_uris.values(), error=False)
                d['parts']['input_body'] = body and body['parts'] or None
                body = operation.output('body', ns=soap_uris.values(), error=False)
                d['parts']['output_body'] = body and body['parts'] or None
                header = operation.input('header', ns=soap_uris.values(), error=False)
                d['parts']['input_header'] = header and header['part'] or None
                headers = operation.output('header', ns=soap_uris.values(), error=False)
                d['parts']['output_header'] = header and header['part'] or None
                #if action: #TODO: separe operation_binding from operation
                if action:
                    d["action"] = action
        
        def make_key(element_name, element_type):
            "return a suitable key for elements"
            # only distinguish 'element' vs other types
            if element_type in ('complexType', 'simpleType'):
                eltype = 'complexType'
            else:
                eltype = element_type
            if eltype not in ('element', 'complexType', 'simpleType'):
                raise RuntimeError("Unknown element type %s = %s" % (unicode(element_name), eltype))
            return (unicode(element_name), eltype)
        
        #TODO: cleanup element/schema/types parsing:
        def process_element(element_name, node, element_type):
            "Parse and define simple element types"
            if debug: 
                log.debug("Processing element %s %s" % (element_name, element_type))
            for tag in node:
                if tag.get_local_name() in ("annotation", "documentation"):
                    continue
                elif tag.get_local_name() in ('element', 'restriction'):
                    if debug: log.debug("%s has not children! %s" % (element_name,tag))
                    children = tag # element "alias"?
                    alias = True
                elif tag.children():
                    children = tag.children()
                    alias = False
                else:
                    if debug: log.debug("%s has not children! %s" % (element_name,tag))
                    continue #TODO: abstract?
                d = OrderedDict()                    
                for e in children:
                    t = e['type']
                    if not t:
                        t = e['base'] # complexContent (extension)!
                    if not t:
                        t = 'anyType' # no type given!
                    t = t.split(":")
                    if len(t)>1:
                        ns, type_name = t
                    else:
                        ns, type_name = None, t[0]
                    if element_name == type_name:
                        pass ## warning with infinite recursion
                    uri = ns and e.get_namespace_uri(ns) or xsd_uri
                    if uri==xsd_uri:
                        # look for the type, None == any
                        fn = REVERSE_TYPE_MAP.get(unicode(type_name), None)
                    else:
                        # simple / complex type, postprocess later 
                        fn = elements.setdefault(make_key(type_name, "complexType"), OrderedDict())
                        
                    if e['name'] is not None and not alias:
                        e_name = unicode(e['name'])
                        d[e_name] = fn
                    else:
                        if debug: log.debug("complexConent/simpleType/element %s = %s" % (element_name, type_name))
                        d[None] = fn
                    if e['maxOccurs']=="unbounded" or (ns == 'SOAP-ENC' and type_name == 'Array'):
                        # it's an array... TODO: compound arrays?
                        d.array = True
                    if e is not None and e.get_local_name() == 'extension' and e.children():
                        # extend base element:
                        process_element(element_name, e.children(), element_type)
                elements.setdefault(make_key(element_name, element_type), OrderedDict()).update(d)

        # check axis2 namespace at schema types attributes
        self.namespace = dict(wsdl.types("schema", ns=xsd_uri)[:]).get('targetNamespace', self.namespace) 

        imported_schemas = {}

        def preprocess_schema(schema):
            "Find schema elements and complex types"
            for element in schema.children():
                if element.get_local_name() in ('import', ):
                    schema_namespace = element['namespace']
                    schema_location = element['schemaLocation']
                    if schema_location is None:
                        if debug: log.debug("Schema location not provided for %s!" % (schema_namespace, ))
                        continue
                    if schema_location in imported_schemas:
                        if debug: log.debug("Schema %s already imported!" % (schema_location, ))
                        continue
                    imported_schemas[schema_location] = schema_namespace
                    if debug: print "Importing schema %s from %s" % (schema_namespace, schema_location)
                    # Open uri and read xml:
                    xml = fetch(schema_location)
                    # Parse imported XML schema (recursively):
                    imported_schema = SimpleXMLElement(xml, namespace=xsd_uri)
                    preprocess_schema(imported_schema)

                element_type = element.get_local_name()
                if element_type in ('element', 'complexType', "simpleType"):
                    element_name = unicode(element['name'])
                    if debug: log.debug("Parsing Element %s: %s" % (element_type, element_name))
                    if element.get_local_name() == 'complexType':
                        children = element.children()
                    elif element.get_local_name() == 'simpleType':
                        children = element("restriction", ns=xsd_uri)
                    elif element.get_local_name() == 'element' and element['type']:
                        children = element
                    else:
                        children = element.children()
                        if children:
                            children = children.children()
                        elif element.get_local_name() == 'element':
                            children = element
                    if children:
                        process_element(element_name, children, element_type)

        def postprocess_element(elements):
            "Fix unresolved references (elements referenced before its definition, thanks .net)"
            for k,v in elements.items():
                if isinstance(v, OrderedDict):
                    if v.array:
                        elements[k] = [v] # convert arrays to python lists
                    if v!=elements: #TODO: fix recursive elements
                        postprocess_element(v)
                    if None in v and v[None]: # extension base?
                        if isinstance(v[None], dict):
                            for i, kk in enumerate(v[None]):
                                # extend base -keep orginal order-
                                elements[k].insert(kk, v[None][kk], i)
                            del v[None]
                        else:  # "alias", just replace
                            if debug: log.debug("Replacing %s = %s" % (k, v[None]))
                            elements[k] = v[None]
                            #break
                if isinstance(v, list):
                    for n in v: # recurse list
                        postprocess_element(n)

                        
        # process current wsdl schema:
        for schema in wsdl.types("schema", ns=xsd_uri): 
            preprocess_schema(schema)                

        postprocess_element(elements)

        for message in wsdl.message:
            if debug: log.debug("Processing message %s" % message['name'])
            for part in message('part', error=False) or []:
                element = {}
                element_name = part['element']
                if not element_name:
                    # some implementations (axis) uses type instead
                    element_name = part['type']
                type_ns = get_namespace_prefix(element_name)
                type_uri = wsdl.get_namespace_uri(type_ns)
                if type_uri == xsd_uri:
                    element_name = get_local_name(element_name)
                    fn = REVERSE_TYPE_MAP.get(unicode(element_name), None)
                    element = {part['name']: fn}
                    # emulate a true Element (complexType)
                    messages.setdefault((message['name'], None), {message['name']: OrderedDict()}).values()[0].update(element)
                else:
                    element_name = get_local_name(element_name)
                    fn = elements.get(make_key(element_name, 'element'))
                    if not fn:
                        # some axis servers uses complexType for part messages
                        fn = elements.get(make_key(element_name, 'complexType'))
                        element = {message['name']: {part['name']: fn}}
                    else:
                        element = {element_name: fn}
                    messages[(message['name'], part['name'])] = element

        def get_message(message_name, part_name):
            if part_name:
                # get the specific part of the message:
                return messages.get((message_name, part_name))
            else:
                # get the first part for the specified message:
                for (message_name_key, part_name_key), message in messages.items():
                    if message_name_key == message_name:
                        return message
                
        for port_type in wsdl.portType:
            port_type_name = port_type['name']
            if debug: log.debug("Processing port type %s" % port_type_name)
            binding = port_type_bindings[port_type_name]

            for operation in port_type.operation:
                op_name = operation['name']
                op = operations[op_name] 
                op['documentation'] = unicode(operation('documentation', error=False) or '')
                if binding['soap_ver']: 
                    #TODO: separe operation_binding from operation (non SOAP?)
                    input = get_local_name(operation.input['message'])
                    output = get_local_name(operation.output['message'])
                    header = get_local_name(op['parts'].get('input_header'))
                    op['input'] = get_message(input, op['parts'].get('input_body'))
                    op['output'] = get_message(output, op['parts'].get('output_body'))
                    op['header'] = get_message(input, op['parts'].get('input_header'))

        if debug:
            import pprint
            log.debug(pprint.pformat(services))
        
        # Save parsed wsdl (cache)
        if cache:
            f = open(filename_pkl, "wb")
            pkl = {
                'version': __version__.split(" ")[0], 
                'url': url, 
                'namespace': self.namespace, 
                'documentation': self.documentation,
                'services': services,
                }
            pickle.dump(pkl, f)
            f.close()
        
        return services

    def __setitem__(self, item, value):
        "Set SOAP Header value"
        self.__headers[item] = value

    def close(self):
        "Finish the connection and remove temp files"
        self.http.close()
        if self.cacert.startswith(tempfile.gettempdir()):
            if self.trace: log.info("removing %s" % self.cacert)
            os.unlink(self.cacert)
            

def parse_proxy(proxy_str):
    "Parses proxy address user:pass@host:port into a dict suitable for httplib2"
    if isinstance(proxy_str, unicode):
        proxy_str = proxy_str.encode("utf8")
    proxy_dict = {}
    if proxy_str is None:
        return 
    if "@" in proxy_str:
        user_pass, host_port = proxy_str.split("@")
    else:
        user_pass, host_port = "", proxy_str
    if ":" in host_port:
        host, port = host_port.split(":")
        proxy_dict['proxy_host'], proxy_dict['proxy_port'] = host, int(port)
    if ":" in user_pass:
        proxy_dict['proxy_user'], proxy_dict['proxy_pass'] = user_pass.split(":")
    return proxy_dict
    
    
if __name__ == "__main__":
    pass


