带有空字符串的 UriTemplate 的 WebInvoke

Question

当运行时在占位符中提供空字符串时，WebInvokeAttribute 和 UriTemplate 解析器的行为如何？

文档似乎没有涵盖这一点。

在一些继承的代码中，我遇到了当传递空字符串时方法无法正确解析的情况。与其他web方式没有明显的冲突。

谢谢！

更新：

在 UriTemplate 中，例如："/{x}/{y}?z={z}"，如果部分或全部值作为 "" 空字符串提供，会出现什么行为，但分隔符仍然存在，"/17/?z=", "//apple?z=", "//?z=%20" ， <代码>“//？z =”。另外，按照标准，浏览器是否允许在发送 URI 之前清理 URI？

Answer 1

空字符串意味着操作的 URI 位于与端点相同的地址 - 有关更多信息，请参阅下面的示例。

public class StackOverflow_6267866
{
    [ServiceContract]
    public interface ITest1
    {
        [WebInvoke(UriTemplate = "")]
        string EchoString(string text);
    }
    [ServiceContract]
    public interface ITest2
    {
        [WebInvoke(UriTemplate = "", BodyStyle = WebMessageBodyStyle.WrappedRequest)]
        int Add(int x, int y);
    }
    public class Service : ITest1, ITest2
    {
        public string EchoString(string text)
        {
            return text;
        }

        public int Add(int x, int y)
        {
            return x + y;
        }
    }
    static void SendPostRequest(string uri, string contentType, string body)
    {
        HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(uri);
        req.Method = "POST";
        req.ContentType = contentType;
        byte[] bodyBytes = Encoding.UTF8.GetBytes(body);
        req.GetRequestStream().Write(bodyBytes, 0, bodyBytes.Length);
        req.GetRequestStream().Close();

        HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
        Console.WriteLine("HTTP/{0} {1} {2}", resp.ProtocolVersion, (int)resp.StatusCode, resp.StatusDescription);
        foreach (string headerName in resp.Headers.AllKeys)
        {
            Console.WriteLine("{0}: {1}", headerName, resp.Headers[headerName]);
        }
        Console.WriteLine();
        Stream respStream = resp.GetResponseStream();
        Console.WriteLine(new StreamReader(respStream).ReadToEnd());
        Console.WriteLine();
        Console.WriteLine("  *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*  ");
        Console.WriteLine();
    }
    public static void Test()
    {
        string baseAddress = "http://" + Environment.MachineName + ":8000/Service";
        ServiceHost host = new ServiceHost(typeof(Service), new Uri(baseAddress));
        host.AddServiceEndpoint(typeof(ITest1), new WebHttpBinding(), "ITest1").Behaviors.Add(new WebHttpBehavior());
        host.AddServiceEndpoint(typeof(ITest2), new WebHttpBinding(), "ITest2").Behaviors.Add(new WebHttpBehavior());
        host.Open();
        Console.WriteLine("Host opened");

        SendPostRequest(baseAddress + "/ITest1", "application/json", "\"hello world\"");
        SendPostRequest(baseAddress + "/ITest1/", "application/json", "\"hello world\"");
        SendPostRequest(baseAddress + "/ITest2", "application/json", "{\"x\":123,\"y\":456}");
        SendPostRequest(baseAddress + "/ITest2/", "application/json", "{\"x\":123,\"y\":456}");

        Console.Write("Press ENTER to close the host");
        Console.ReadLine();
        host.Close();
    }
}