webservice Quiz（Wsdl ＆Soap）

  <wsdl:types />
  <wsdl:message name="AddSoapIn">
    <wsdl:part name="a" type="s:int" />
    <wsdl:part name="b" type="s:int" />
  </wsdl:message>
  <wsdl:message name="AddSoapOut">
    <wsdl:part name="AddResult" type="s:int" />
  </wsdl:message>
  <wsdl:portType name="MathServiceSoap">
    <wsdl:operation name="Add">
      <wsdl:input message="tns:AddSoapIn" />
      <wsdl:output message="tns:AddSoapOut" />
    </wsdl:operation>
  </wsdl:portType>
  <wsdl:binding name="MathServiceSoap" type="tns:MathServiceSoap">
    <soap:binding transport="http://schemas.xmlsoap.org/soap/http" style="document" />
    <wsdl:operation name="Add">
      <soap:operation soapAction="http://idior.cnblogs.com/Math/Add" style="rpc" />
      <wsdl:input>
        <soap:body use="encoded" namespace="http://tempuri.org/" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" />
      </wsdl:input>
      <wsdl:output>
        <soap:body use="encoded" namespace="http://tempuri.org/" encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" />
      </wsdl:output>
    </wsdl:operation>
  </wsdl:binding>

以上是一段wsdl的片断，其中主要定义了一个Add方法。针对粗体字部分，我们得到以下使用该webservice的soap请求。

POST /WebService1/Service1.asmx HTTP/1.1
Host: localhost
Content-Type: text/xml; charset=utf-8
Content-Length: length
SOAPAction: "http://idior.cnblogs.com/Math/Add"

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:tns="http://tempuri.org/" xmlns:types="http://tempuri.org/encodedTypes" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body soap:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
    <tns:Add>
      <a xsi:type="xsd:int">int</a>
      <b xsi:type="xsd:int">int</b>
    </tns:Add>
  </soap:Body>
</soap:Envelope>

可以看出在WSDL中定义好的SoapAction被放在了Http的请求头中， 为了调用Add这个WebService中的方法，SOAP包中粗体字部分发出的请求恰恰对应了WSDL中定义的operation的name---Add.

那么对于下面的WSDL文件，我们又该发出怎样的SOAP请求呢？

<wsdl:types>
    <s:schema elementFormDefault="qualified" targetNamespace="http://tempuri.org/">
      <s:element name="Add">
        <s:complexType>
          <s:sequence>
            <s:element minOccurs="1" maxOccurs="1" name="a" type="s:int" />
            <s:element minOccurs="1" maxOccurs="1" name="b" type="s:int" />
          </s:sequence>
        </s:complexType>
      </s:element>
      <s:element name="AddReponse">
        <s:complexType>
          <s:sequence>
            <s:element minOccurs="1" maxOccurs="1" name="AddOperationResult" type="s:int" />
          </s:sequence>
        </s:complexType>
      </s:element>
    </s:schema>
  </wsdl:types>
  <wsdl:message name="AddOperationSoapIn">
    <wsdl:part name="parameters" element="tns:Add" />
  </wsdl:message>
  <wsdl:message name="AddOperationSoapOut">
    <wsdl:part name="parameters" element="tns:AddReponse" />
  </wsdl:message>
  <wsdl:portType name="MathServiceSoap">
    <wsdl:operation name="AddOperation">
      <wsdl:input message="tns:AddOperationSoapIn" />
      <wsdl:output message="tns:AddOperationSoapOut" />
    </wsdl:operation>
  </wsdl:portType>
  <wsdl:binding name="MathServiceSoap" type="tns:MathServiceSoap">
    <soap:binding transport="http://schemas.xmlsoap.org/soap/http" style="document" />
    <wsdl:operation name="AddOperation">
      <soap:operation soapAction="http://idior.cnblogs.com/Math/Add" style="document" />
      <wsdl:input>
        <soap:body use="literal" />
      </wsdl:input>
      <wsdl:output>
        <soap:body use="literal" />
      </wsdl:output>
    </wsdl:operation>
  </wsdl:binding>

现在为了调用AddOperation（注意 Add改成AddOperation了）方法，你认为Soap Body中对应的那个元素名???是什么呢？

POST /WebService1/Service1.asmx HTTP/1.1
Host: localhost
Content-Type: text/xml; charset=utf-8
Content-Length: length
SOAPAction: "http://idior.cnblogs.com/Math/Add"

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
  <soap:Body>
    <??? xmlns="http://tempuri.org/">
      <a>int</a>
      <b>int</b>
    </???> 
  </soap:Body>
</soap:Envelope>

原理说明