通过LINQ到XML的解析策略

本文关键字：策略 XML LINQ 通过 | 更新日期: 2023-09-27 18:18:46

<wsdl:definitions xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"
 xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
 xmlns:tns="http://ttdev.com/ss"
 xmlns:xsd="http://www.w3.org/2001/XMLSchema"
 xmlns:sp="http://schemas.xmlsoap.org/ws/2005/07/securitypolicy"
 xmlns:wsp="http://schemas.xmlsoap.org/ws/2004/09/policy"
 xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wsswssecurity-utility-1.0.xsd"
 name="SecureService" targetNamespace="http://ttdev.com/ss">

<wsp:Policy wsu:Id="p1">
 <sp:SignedParts>
 <sp:Body />
 </sp:SignedParts>
</wsp:Policy>
<wsdl:binding name="SecureServiceSOAP" type="tns:SecureService">
<soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http" />
<wsdl:operation name="concat">
<wsp:PolicyReference URI="#p1" wsdl:required="true" />
<soap:operation soapAction="http://ttdev.com/ss/concat" />
<wsdl:input>
<soap:body parts="concatRequest" use="literal" />
</wsdl:input>
<wsdl:output>
<soap:body parts="concatResponse" use="literal" />
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
<wsdl:service name="SecureService">
<wsdl:port binding="tns:SecureServiceSOAP" name="SecureServiceSOAP">
<soap:address location="http://localhost:8080/axis2/services/SecureService" />
</wsdl:port>
</wsdl:service>
</wsdl:definitions>

此WSDL包含策略部分和操作部分因此，根据操作名称和Tag 的URI属性wsp:PolicyReference我想从WSDl

中获取整个策略XMl部分
<wsp:Policy wsu:Id="p1">
     <sp:SignedParts>
     <sp:Body />
     </sp:SignedParts>
    </wsp:Policy>

可以有许多策略，但其ID与我传递的操作名的策略引用的URI值匹配，即我想要的策略。

你能帮我获取策略XML部分吗?

当某人将pOperationName变量的值传递为concat时，则输出字符串应如下:

<wsp:Policy wsu:Id="p1">
 <sp:SignedParts>
 <sp:Body />
 </sp:SignedParts>
</wsp:Policy>

使用以下代码完成

 private string GetPolicy()
        {
            XDocument wsdlDocument = XDocument.Load(_wsdlPath);
            XName operationElementName = XName.Get("operation", "http://schemas.xmlsoap.org/wsdl/");
            XName policyReferenceElementName = XName.Get("PolicyReference", "http://schemas.xmlsoap.org/ws/2004/09/policy");
            XName policyElementName = XName.Get("Policy", "http://schemas.xmlsoap.org/ws/2004/09/policy");
            XName idAttributeName = XName.Get("Id", "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wsswssecurity-utility-1.0.xsd");
            var operationPolicy = from operation in wsdlDocument.Descendants(operationElementName)
                                  where operation.Attribute("name").Value == _operationSelected
                                  from policyReference in operation.Descendants(policyReferenceElementName)
                                  where policyReference.Attribute("URI").Value.StartsWith("#")
                                  let uri = policyReference.Attribute("URI").Value.Substring(1)
                                  from policy in wsdlDocument.Descendants(policyElementName)
                                  where policy.Attribute(idAttributeName).Value == uri            
                                  select policy.ToString();
            #region Removing Embedded Namespaces
            string temp = operationPolicy.FirstOrDefault();
            if (temp.Contains(Constants.WSPolicyNsURI.XMLNS_SP) || temp.Contains(Constants.WSPolicyNsURI.XMLNS_WSP) || temp.Contains(Constants.WSPolicyNsURI.XMLNS_WSU))
            {
                temp = temp.Replace(Constants.WSPolicyNsURI.XMLNS_SP, String.Empty);
                temp = temp.Replace(Constants.WSPolicyNsURI.XMLNS_WSP, String.Empty);
                temp = temp.Replace(Constants.WSPolicyNsURI.XMLNS_WSU, String.Empty);
            }
            #endregion
            return temp;
        }

通过LINQ到XML的解析策略

    private string GetPolicy(string pWsdlPath, string pOperationName)
    {
        XDocument wsdlDocument = XDocument.Load(pWsdlPath);
        XName operationElementName = XName.Get("operation", "http://schemas.xmlsoap.org/wsdl/");
        XName policyReferenceElementName = XName.Get("PolicyReference", "http://schemas.xmlsoap.org/ws/2004/09/policy");
        XName policyElementName = XName.Get("Policy", "http://schemas.xmlsoap.org/ws/2004/09/policy");
        XName idAttributeName = XName.Get("Id", "http://docs.oasis-open.org/wss/2004/01/oasis-200401-wsswssecurity-utility-1.0.xsd");
        var operationPolicy = from operation in wsdlDocument.Descendants(operationElementName)
                              where operation.Attribute("name").Value == "concat"
                              from policyReference in operation.Descendants(policyReferenceElementName)
                              where policyReference.Attribute("URI").Value.StartsWith("#")
                              let uri = policyReference.Attribute("URI").Value.Substring(1)
                              from policy in wsdlDocument.Descendants(policyElementName)
                              where policy.Attribute(idAttributeName).Value == uri
                              select policy.ToString();
        return operationPolicy.FirstOrDefault();
    }

首先，您为什么要使用XmlDocument ?直接使用XDocument.Load(pWsdlPath)

其次，您需要使用XNamespace:

XNamespace wsdl = "http://schemas.xmlsoap.org/wsdl/";
XNamespace wsp = "http://schemas.xmlsoap.org/ws/2004/09/policy";
var objOperationsList = wsdlElement
                  .Elements(wsdl + "binding")
                  .Select(Operation => new
                  {
                      OperationName = (string)Operation.Element(wsdl + "operation").Attribute("name"),
                      OperationPolicyURI = (string)Operation.Element(wsdl + "operation").Element(wsp + "PolicyReference").Attribute("URI")
                  });
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