WCF技术内幕 第二章 - 简单的Message

1.契约 - 接口 (客户端和服务端都要认识Message)

 namespace WCFService
 {
     [ServiceContract(Namespace = "http://wintellect.com/ProcessOrder")]
     public interface IOrderContract
     {
         [OperationContract(Action="urn:SubmitOrder")]
         void SubmitOrder(Message order);
     }
 }

2.服务端实现服务

 namespace WCFService
 {
     public sealed class MyService : IOrderContract
     {
         public void SubmitOrder(Message order)
         {
             string fileName = "Order" + order.Headers.MessageId.ToString() + ".xml";
             Console.WriteLine("Message ID {0} received", order.Headers.MessageId.ToString());
             System.Xml.XmlDictionaryWriter writer = System.Xml.XmlDictionaryWriter.CreateTextWriter(new FileStream(fileName, FileMode.Create));

             order.WriteMessage(writer);
             writer.Close();
         }
     }
 }

3.创建服务代理，对请求进行服务

 namespace WCFService
 {
     class Program
     {
         static void Main(string[] args)
         {
             WSHttpBinding binding = new WSHttpBinding(SecurityMode.None);

             binding.MessageEncoding = WSMessageEncoding.Text;

             Uri addressURI = new Uri(@"http://localhost:4000/Order");

             ServiceHost svc = new ServiceHost(typeof(MyService));
             svc.AddServiceEndpoint(typeof(IOrderContract), binding, addressURI);

             svc.Open();
             Console.WriteLine("The receiver is ready...");
             Console.ReadLine();

             svc.Close();
         }
     }
 }

4.客户端构造Message，发送服务请求

4.1.构造消息体

        public static Message GenerateMessage(Int32 productId, Int32 qty)
        {
            MemoryStream stream = new MemoryStream();  

            XmlDictionaryWriter writer = XmlDictionaryWriter.CreateTextWriter(stream, Encoding.UTF8, false);  

            writer.WriteStartElement("SubmitOrder");
            writer.WriteElementString("ProdID", productId.ToString());
            writer.WriteElementString("Qty", qty.ToString());
            writer.WriteEndElement();  

            writer.Flush();
            stream.Position = ;  

            XmlDictionaryReader reader = XmlDictionaryReader.CreateTextReader(stream, XmlDictionaryReaderQuotas.Max);  

            return Message.CreateMessage(MessageVersion.Soap12WSAddressing10, string.Empty, reader);
        }

4.2.构造消息头，并创建请求服务代理

namespace WCFClinet
{
    class Program
    {
        static void Main(string[] args)
        {
            EndpointAddress address = new EndpointAddress(@"http://localhost:4000/Order");
            WSHttpBinding binding = new WSHttpBinding(SecurityMode.None);
            binding.MessageEncoding = WSMessageEncoding.Text;

            ChannelFactory<IOrderContract> channel = new ChannelFactory<IOrderContract>(binding, address);
            IOrderContract proxy = channel.CreateChannel();

            Message msg = null;
            for (Int32 i = ; i < ; i++)
            {
                msg = GenerateMessage(i, i);

                UniqueId uniqueId = new UniqueId(i.ToString());
                msg.Headers.MessageId = uniqueId;

                Console.WriteLine("Sending msg # {0}", uniqueId.ToString());

                msg.Headers.Action = "urn:SubmitOrder";
                proxy.SubmitOrder(msg);
            }
        }

5.查看服务端接收到的消息（第三个Message）

 <s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope" xmlns:a="http://www.w3.org/2005/08/addressing">
     <s:Header>
         <a:Action s:mustUnderstand="1">urn:SubmitOrder</a:Action>
         <a:MessageID>3</a:MessageID>
         <a:ReplyTo>
             <a:Address>http://www.w3.org/2005/08/addressing/anonymous</a:Address>
         </a:ReplyTo>
         <a:To s:mustUnderstand="1">http://localhost:4000/Order</a:To>
         </s:Header>
     <s:Body>
         <SubmitOrder>
             <ProdID>3</ProdID>
             <Qty>3</Qty>
         </SubmitOrder>
     </s:Body>
 </s:Envelope>