WCF技术内幕 第二章

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 = 0;  
  
            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 = 0; i < 10; 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>