.net WebService拦截器 && android Soap头部验证

//生成调用Webservice方法的SOAP请求信息。该信息由SoapSerializationEnvelope对象描述
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.headerOut = new Element[1];
envelope.headerOut[0] = buildAuthHeader();

......

public static Element buildAuthHeader(){
	Element hElement = new Element().createElement(Constants.NAMESPACE, "AuthHead");
	Element passwordElement = new Element().createElement(Constants.NAMESPACE, "loginInfo");
	passwordElement.setName("loginInfo");

	passwordElement.addChild(org.kxml2.kdom.Node.TEXT, "这是头部信息包含的内容");
	hElement.addChild(org.kxml2.kdom.Node.ELEMENT, passwordElement);
	return hElement;
}

......
<wsdl:types>  
    <s:schema ...>  
    ......

    <s:element name="AuthHead" type="tns:AuthHead"/>
         <s:complexType name="AuthHead">
            <s:sequence>
              <s:element minOccurs="0" maxOccurs="1" name="loginInfo" type="s:string" />
            </s:sequence>
          <s:anyAttribute />
     </s:complexType>

    ...... 
    </ s:schema >  
</wsdl:types>

public class AuthHead : SoapHeader
{
      public string loginInfo;
}

public AuthHead authToken;

......

[WebMethod]
[SoapHeader("authToken")]

public string getSoap()
{
    if (authToken == null)
    {
        return null;
    }else{

       //得到头部信息
       string loginInfo = authToken.loginInfo;

       //进行验证
       .......

     }
}