support returning other error codes as per UPnP spec..

[git-p4: depot-paths = "//depot/": change = 765]

upnp.py

@@ -7,6 +7,10 @@ from twisted.web import soap
 
 import SOAPpy
 
+class errorCode(Exception):
+	def __init__(self, status):
+		self.status = status
+
 class UPnPPublisher(soap.SOAPPublisher):
 	"""UPnP requires OUT parameters to be returned in a slightly
 	different way than the SOAPPublisher class does."""
@@ -14,3 +18,15 @@ class UPnPPublisher(soap.SOAPPublisher):
 	def _gotResult(self, result, request, methodName):
 		response = SOAPpy.buildSOAP(kw=result, encoding=self.encoding)
 		self._sendResponse(request, response)
+
+	def _gotError(self, failure, request, methodName):
+		e = failure.value
+		status = 500
+		if isinstance(e, SOAPpy.faultType):
+			fault = e
+		else:
+			if isinstance(e, errorCode):
+				status = e.status
+			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=status)