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# -*- test-case-name: twisted.web.test.test_soap -*-
# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
SOAP support for twisted.web.
Requires SOAPpy 0.10.1 or later.
Maintainer: Itamar Shtull-Trauring
Future plans:
SOAPContext support of some kind.
Pluggable method lookup policies.
"""
# SOAPpy
import SOAPpy
# twisted imports
from twisted.web import server, resource, client
from twisted.internet import defer
class SOAPPublisher(resource.Resource):
"""Publish SOAP methods.
By default, publish methods beginning with 'soap_'. If the method
has an attribute 'useKeywords', it well get the arguments passed
as keyword args.
"""
isLeaf = 1
# override to change the encoding used for responses
encoding = "UTF-8"
def lookupFunction(self, functionName):
"""Lookup published SOAP function.
Override in subclasses. Default behaviour - publish methods
starting with soap_.
@return: callable or None if not found.
"""
return getattr(self, "soap_%s" % functionName, None)
def render(self, request):
"""Handle a SOAP command."""
data = request.content.read()
p, header, body, attrs = SOAPpy.parseSOAPRPC(data, 1, 1, 1)
methodName, args, kwargs = p._name, p._aslist, p._asdict
# deal with changes in SOAPpy 0.11
if callable(args):
args = args()
if callable(kwargs):
kwargs = kwargs()
function = self.lookupFunction(methodName)
if not function:
self._methodNotFound(request, methodName)
return server.NOT_DONE_YET
else:
if hasattr(function, "useKeywords"):
keywords = {}
for k, v in kwargs.items():
keywords[str(k)] = v
d = defer.maybeDeferred(function, **keywords)
else:
d = defer.maybeDeferred(function, *args)
d.addCallback(self._gotResult, request, methodName)
d.addErrback(self._gotError, request, methodName)
return server.NOT_DONE_YET
def _methodNotFound(self, request, methodName):
response = SOAPpy.buildSOAP(SOAPpy.faultType("%s:Client" %
SOAPpy.NS.ENV_T, "Method %s not found" % methodName),
encoding=self.encoding)
self._sendResponse(request, response, status=500)
def _gotResult(self, result, request, methodName):
if not isinstance(result, SOAPpy.voidType):
result = {"Result": result}
response = SOAPpy.buildSOAP(kw={'%sResponse' % methodName: result},
encoding=self.encoding)
self._sendResponse(request, response)
def _gotError(self, failure, request, methodName):
e = failure.value
if isinstance(e, SOAPpy.faultType):
fault = e
else:
fault = SOAPpy.faultType("%s:Server" % SOAPpy.NS.ENV_T,
"Method %s failed." % methodName)
response = SOAPpy.buildSOAP(fault, encoding=self.encoding)
self._sendResponse(request, response, status=500)
def _sendResponse(self, request, response, status=200):
request.setResponseCode(status)
if self.encoding is not None:
mimeType = 'text/xml; charset="%s"' % self.encoding
else:
mimeType = "text/xml"
request.setHeader("Content-type", mimeType)
request.setHeader("Content-length", str(len(response)))
request.write(response)
request.finish()
class Proxy:
"""A Proxy for making remote SOAP calls.
Pass the URL of the remote SOAP server to the constructor.
Use proxy.callRemote('foobar', 1, 2) to call remote method
'foobar' with args 1 and 2, proxy.callRemote('foobar', x=1)
will call foobar with named argument 'x'.
"""
# at some point this should have encoding etc. kwargs
def __init__(self, url, namespace=None, header=None):
self.url = url
self.namespace = namespace
self.header = header
def _cbGotResult(self, result):
result = SOAPpy.parseSOAPRPC(result)
if hasattr(result, 'Result'):
return result.Result
elif len(result) == 1:
## SOAPpy 0.11.6 wraps the return results in a containing structure.
## This check added to make Proxy behaviour emulate SOAPProxy, which
## flattens the structure by default.
## This behaviour is OK because even singleton lists are wrapped in
## another singleton structType, which is almost always useless.
return result[0]
else:
return result
def callRemote(self, method, *args, **kwargs):
payload = SOAPpy.buildSOAP(args=args, kw=kwargs, method=method,
header=self.header, namespace=self.namespace)
return client.getPage(self.url, postdata=payload, method="POST",
headers={'content-type': 'text/xml',
'SOAPAction': method}
).addCallback(self._cbGotResult)
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