无效的SUDS封包

Question

当我尝试执行这段代码时：

mmurl = 'http://server/_mmwebext/mmwebext.dll?WSDL?server=localhost'
mmclient = Client(mmurl, plugins=[EnvelopeFixer()])
loginResult = mmclient.service[1].Login(u'localhost', u'user', u'pass')

会生成以下的信封：

<SOAP-ENV:Envelope xmlns:ns0="http://menandmice.com/webservices/" xmlns:ns1="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
   <SOAP-ENV:Header/>
   <ns1:Body>
      <ns0:Login>
         <ns0:server>localhost</ns0:server>
         <ns0:loginName>user</ns0:loginName>
         <ns0:password>pass</ns0:password>
      </ns0:Login>
   </ns1:Body>
</SOAP-ENV:Envelope>

返回的结果是：

<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
   <SOAP-ENV:Body>
      <SOAP-ENV:Fault>
         <faultcode>SOAP-ENV:Client</faultcode>
         <faultstring>Invalid command.</faultstring>
         <detail>
            <mmfaultdetails>
               <message>Invalid command.</message>
               <errorcode>5001</errorcode>
            </mmfaultdetails>
         </detail>
      </SOAP-ENV:Fault>
   </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

但是如果我在soapUI中把它改成

<SOAP-ENV:Envelope xmlns:ns0="http://menandmice.com/webservices/" xmlns:ns1="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
   <SOAP-ENV:Header/>
   <SOAP-ENV:Body>
      <ns0:Login>
         <ns0:server>localhost</ns0:server>
         <ns0:loginName>user</ns0:loginName>
         <ns0:password>pass</ns0:password>
      </ns0:Login>
   </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

就能成功返回了

<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
   <SOAP-ENV:Body>
      <LoginResponse xmlns="http://menandmice.com/webservices/">
         <session>UEk6A0UC5bRJ92MqeLiU</session>
      </LoginResponse>
   </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

所以我的问题是，我能不能强制suds创建一个<SOAP-ENV:Body>的标签，而不是<ns1:Body>？

我试着看看能不能改变发送的XML，并使用wireshark来监控网络流量，结果发现发送的消息并没有改变。发送的方法确实被调用了，因为我在控制台上看到了打印输出

class EnvelopeFixer(MessagePlugin):
    def sending(self, context):
        # context is the envelope text
        print type(context)
        context.envelope = context.envelope.upper()
        print context.envelope

        return context

我把EnvelopeFixer改成使用marshalled而不是直接发送，这似乎解决了问题

class EnvelopeFixer(MessagePlugin):

    def marshalled(self, context):
        root = context.envelope.getRoot()
        envelope = root.getChild("Envelope")
        envelope.getChildren()[1].setPrefix("SOAP-ENV")
        print envelope.getChildren()[1]

        return context

现在我已经把body元素的前缀改成了服务器要求的格式。太开心了！

Answer 1

很遗憾，这个RPC接口没有正确解析XML。解决这个问题的一种方法是给你的Client()添加一个插件，这样在发送之前可以修改数据包的内容。一个叫做MessagePlugin的插件可以让你在发送之前修改suds.sax.document.Document或者消息文本。

from suds.plugin import MessagePlugin
class EnvelopeFixer(MessagePlugin):
    def sending(self, context):
        # context is the envelope text
        context.envelope = context.envelope.upper()
        return context

client = Client(..., plugins=[EnvelopeFixer()])