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<%@ WebService Language="VJ#" Class="HeaderService" %>

import System.*;
import System.Web.Services.*;
import System.Web.Services.Protocols.*;


     // AuthHeader class extends from SoapHeader
    public class AuthHeader extends SoapHeader {
        public String Username;
        public String Password;
    }

    /** @attribute WebService(Description="Simple sample to demonstrate use of SOAP Headers", Namespace="Microsoft.Samples.XmlMessaging.WebServices") */
    public class HeaderService {

        public AuthHeader sHeader;

        /** @attribute WebMethod(Description="This method requires a custom soap header set by the caller") */
        /** @attribute SoapHeader("sHeader") */
        public String SecureMethod() {

            if (sHeader == null)
              return "ERROR: Please supply credentials";

            String usr = sHeader.Username;
            String pwd = sHeader.Password;

            if (AuthenticateUser(usr, pwd)) {
                 return "SUCCESS: " + usr;
            }
            else {
                 return "ERROR: Could not authenticate";
            }
        }

        private boolean AuthenticateUser(String usr, String pwd) {

            if ((usr != null)&&(pwd != null)) {
                // could query a database here for credentials...
                return true;
             }
            return false;
        }
    }