Question

我一直在努力WCF Json-Rpc Service Model。我对WCF和WCF的可扩展性还不熟悉，但最后我现在能够处理来自Web浏览器的请求:)总结一下，我现在已经实现了一个端点行为，一个操作选择器和一个消息格式化器。

您可以在此post on MSDN forum找到最新的源代码。

我现在正在尝试为它创建一个WCF客户端，但我遇到了以下错误：

Manual addressing is enabled on this factory, so all messages sent must be pre-addressed.

这就是我创建客户端的方式：

    private int communicationTimeout = 10;
    private int communicationPort = 80;
    private string jsonRpcRoot = "/json.rpc";

    public void InitializeClient()
    { 
        Uri baseAddress = new UriBuilder(Uri.UriSchemeHttp, Environment.MachineName, communicationPort, jsonRpcRoot).Uri;
        EndpointAddress address = new EndpointAddress(baseAddress.AbsoluteUri);

        ChannelFactory<IJsonService> channelFactory = new ChannelFactory<IJsonService>(new WebHttpBinding(), address);
        channelFactory.Endpoint.Behaviors.Add(new JsonRpcEndpointBehavior());

        IJsonService typedProxy = channelFactory.CreateChannel();

        int a = typedProxy.StartTransport(10);
    }

这是我的（测试）服务合同。我保持尽可能简单

[ServiceContract(Namespace = "")]
public interface IJsonService
{
    [OperationContract]
    IList<Mission> GetMissions();

    [OperationContract]
    int StartTransport(int missionId);

    [OperationContract]
    int TransportCompleted(int missionId);
}

Answer 1

我的问题的答案就在于消息格式化程序。

该错误表示构建并返回到WCF堆栈的消息不包含地址。

为了满足此规则，IClientMessageFormatter应在

中包含一些值

Message.Headers.To

我已将IClientMessageFormatter.SerializeRequest实现更改为：

    public Message SerializeRequest(MessageVersion messageVersion, object[] parameters)
    {
        string jsonText = SerializeJsonRequestParameters(parameters);

        // Compose message
        Message message = Message.CreateMessage(messageVersion, _clientOperation.Action, new JsonRpcBodyWriter(Encoding.UTF8.GetBytes(jsonText)));
        message.Properties.Add(WebBodyFormatMessageProperty.Name, new WebBodyFormatMessageProperty(WebContentFormat.Raw));
        _address.ApplyTo(message);

        HttpRequestMessageProperty reqProp = new HttpRequestMessageProperty();
        reqProp.Headers[HttpRequestHeader.ContentType] = "application/json";
        message.Properties.Add(HttpRequestMessageProperty.Name, reqProp);

        UriBuilder builder = new UriBuilder(message.Headers.To);
        builder.Query = string.Format("jsonrpc={0}", HttpUtility.UrlEncode(jsonText));
        message.Headers.To = builder.Uri;
        message.Properties.Via = builder.Uri;

        return message;
    }

具有自定义端点行为的WCF ChannelFactory（Json-Rpc）

1 个答案: