python - SOAP 请求中的类型错误(使用 pysimplesoap)

Question

我正在尝试从荷兰政府土地登记处 ( WSDL here ) 的 SOAP 服务中获取相关信息 PySimpleSoap .到目前为止，我设法使用以下代码连接并请求有关特定属性的信息:

from pysimplesoap.client import SoapClient
client = SoapClient(wsdl='http://www1.kadaster.nl/1/schemas/kik-inzage/20141101/verzoekTotInformatie-2.1.wsdl', username='xxx', password='xxx', trace=True)

response = client.VerzoekTotInformatie(
    Aanvraag={
        'berichtversie': '4.7',  # Refers to the schema version
        'klantReferentie': klantReferentie,  # A reference we can set ourselves.
        'productAanduiding': '1185',  # a four-digit code referring to whether the response should be in "XML" (1185), "PDF" (1191) or "XML and PDF" (1057).
        'Ingang': {
            'Object': {
                'IMKAD_KadastraleAanduiding': {
                    'gemeente': 'ARNHEM AC',  # municipality
                    'sectie': 'AC',  # section code
                    'perceelnummer': '1234'  # Lot number
                }
            }
        }
    }
)

这个“有点”有效。我设置了 trace=True 所以我得到了大量的日志消息，在这些日志消息中我看到了一个巨大的 xml 输出 ( paste here )，它几乎包括了我请求的所有信息。但是，我也得到了这个回溯:

Traceback (most recent call last):
  File "<input>", line 1, in <module>
    'perceelnummer': perceelnummer
  File "/Library/Python/2.7/site-packages/pysimplesoap/client.py", line 181, in <lambda>
    return lambda *args, **kwargs: self.wsdl_call(attr, *args, **kwargs)
  File "/Library/Python/2.7/site-packages/pysimplesoap/client.py", line 346, in wsdl_call
    return self.wsdl_call_with_args(method, args, kwargs)
  File "/Library/Python/2.7/site-packages/pysimplesoap/client.py", line 372, in wsdl_call_with_args
    resp = response('Body', ns=soap_uri).children().unmarshall(output)
  File "/Library/Python/2.7/site-packages/pysimplesoap/simplexml.py", line 433, in unmarshall
    value = children and children.unmarshall(fn, strict)
  File "/Library/Python/2.7/site-packages/pysimplesoap/simplexml.py", line 433, in unmarshall
    value = children and children.unmarshall(fn, strict)
  File "/Library/Python/2.7/site-packages/pysimplesoap/simplexml.py", line 433, in unmarshall
    value = children and children.unmarshall(fn, strict)
  File "/Library/Python/2.7/site-packages/pysimplesoap/simplexml.py", line 380, in unmarshall
    raise TypeError("Tag: %s invalid (type not found)" % (name,))
TypeError: Tag: IMKAD_Perceel invalid (type not found)

据我所知，这意味着 simplexml parser 无法理解 IMKAD_Perceel 标签这(我猜)是因为它无法在 wdsl 文件中读取/找到此标记的定义。

所以我检查了解析 wsdl 文件的(大量)日志消息，并显示了这些行:

DEBUG:pysimplesoap.helpers:Parsing Element element: IMKAD_Perceel
DEBUG:pysimplesoap.helpers:Processing element IMKAD_Perceel element
DEBUG:pysimplesoap.helpers:IMKAD_Perceel has no children!
DEBUG:pysimplesoap.helpers:complexContent/simpleType/element IMKAD_Perceel = IMKAD_Perceel
DEBUG:pysimplesoap.helpers:Parsing Element complexType: IMKAD_Perceel
DEBUG:pysimplesoap.helpers:Processing element IMKAD_Perceel complexType
DEBUG:pysimplesoap.helpers:complexContent/simpleType/element IMKAD_Perceel = IMKAD_OnroerendeZaak
DEBUG:pysimplesoap.helpers:Processing element IMKAD_Perceel complexType

我猜这些行意味着 IMKAD_Perceel 定义是空的。所以我用了 SoapUI反省the WSDL file ，我在其中找到了 an url to this .xsd-file我在其中找到了 IMKAD_Perceel 的定义:

<xs:element name="IMKAD_Perceel" 
    substitutionGroup="ipkbo:IMKAD_OnroerendeZaak" 
    type="ipkbo:IMKAD_Perceel"
    />

标签确实似乎正在自行关闭，这意味着它是空的。这就是 pysimplesoap 认为 IMKAD_Perceel 未定义的原因吗？为什么它不能简单地解释 xml 并将其作为字典返回？ (如前所述，我收到的完整 xml 输出在 this paste 中)。

有谁知道我如何让 pysimplesoap 解释 xml 并将其转换为字典，无论它是否遵守 wsdl？

欢迎所有提示!

Answer 1

pysimplesoap 似乎无法处理 xml 模式中的 substitutionGroup。

你可以在 xsd 文件中看到:

<xs:element name="IMKAD_Perceel" 
substitutionGroup="ipkbo:IMKAD_OnroerendeZaak" 
type="ipkbo:IMKAD_Perceel"
/>

有这个 substitutionGroup，这意味着 IMKAD_Perceel 和 IMKAD_OnroerendeZaak 是同一个东西，可以互相替代。

在 soap 模式中，响应的这个特定部分定义为:

<xs:complexType name="BerichtGegevens">
 <xs:annotation>
   <xs:documentation>Inhoud van het bericht.</xs:documentation>    
 </xs:annotation>
 <xs:sequence>
   <xs:element ref="ipkbo:IMKAD_OnroerendeZaak" minOccurs="1" maxOccurs="1"/>
   <xs:element ref="ipkbo:Recht" minOccurs="1" maxOccurs="1"/><xs:element ref="ipkbo:IMKAD_Stuk" minOccurs="0" maxOccurs="unbounded"/>
   <xs:element ref="ipkbo:IMKAD_Persoon" minOccurs="1" maxOccurs="unbounded"/>
   <xs:element ref="ipkbo:GemeentelijkeRegistratie" minOccurs="0" maxOccurs="unbounded"/>
 </xs:sequence>
</xs:complexType>

但是，您可以看到实际的响应是这样的:

<ipkbo:BerichtGegevens>
  <ipkbo:IMKAD_Perceel>...</ipkbo:IMKAD_Perceel>
  <ipkbo:Recht>...</ipkbo:Recht>
  <ipkbo:IMKAD_AangebodenStuk>...</ipkbo:IMKAD_AangebodenStuk>
  <ipkbo:IMKAD_Persoon>...</ipkbo:IMKAD_Persoon>
</ipkbo:BerichtGegevens>

然后 pysimplesoap 似乎变得困惑，无法获得正确的响应类型。