Python通过suds调用WCF服务 传递Python List 到 WCF Service

问题：

python传递list (or array, collection) of strings 到一个WCF service endpoint

The WCF interface:

[OperationContract]string[] TestList(IEnumerable<string> vals);

Binding in Web.config:

<endpoint address="http://localhost:13952/Service/Endpoint.svc" binding="basicHttpBinding" contract="Service.IEndpoint">

Python调用WCF服务:

from suds.client import Clienturl = 'http://localhost:13952/Service/Endpoint.svc?wsdl'client = Client(url)result = client.service.TestList(('a', 'b', 'c'))

错误:

suds.WebFault: Server raised fault: 'The formatter threw an exception while trying to deserialize the message: There was an error while trying to deserialize parameter http://tempuri.org/:vals. The InnerException message was 'Error in line 1 position 310. Expecting state 'Element'.. Encountered 'Text'  with name '', namespace ''. '.  Please see InnerException for more details.'

使用WireShark抓包，观察序列化后的soap数据，发现list序列化有错误，导致服务端无法反序列化。

解决方案：

使用Suds client factory。此步骤非常重要：

client.factory.create('ArrayOfString')

示例如下：

#!/usr/bin/env pythonimport unittestimport sudsfrom suds.client import Clientclass TestCSharpWebService(unittest.TestCase):    def setUp(self):        url = "http://localhost:8080/WebService.asmx?wsdl=0"        self.client = Client(url)    def test_service_definition(self):        # You can print client to see service definition.        self.assertTrue("orderAlphabetically" in self.client.__str__())        self.assertTrue("ArrayOfString" in self.client.__str__())    def test_orderAlphabetically_service(self):        # Instanciate your type using the factory and use it.        ArrayOfString = self.client.factory.create('ArrayOfString')        ArrayOfString.string = ['foo', 'bar', 'foobar', 'a', 'b', 'z']        result = self.client.service.orderAlphabetically(ArrayOfString)        # The result list contains suds.sax.text.Text which acts like a string.        self.assertEqual(            type(result.string[0]),            suds.sax.text.Text)        self.assertEqual(            [str(x) for x in result.string],            ['a', 'b', 'bar', 'foo', 'foobar', 'z'])if __name__ == '__main__':    unittest.main()

web service：

namespace WebServiceMono{    using System.Linq;    using System.Web.Services;    using System.Collections.Generic;    public class WebService : System.Web.Services.WebService    {        [WebMethod]        public string[] orderAlphabetically (List<string> list)        {            var result = list.OrderBy (s => s);            return result.ToArray ();        }    }}

使用client.factory.create('ArrayOfString')后可以很好的解决python list序列化问题。