如何自定義WCF錯誤行爲

我正在創建一個WCF服務來提供REST-ful Web HTTP服務。這就是我想：「端點未找到」如何自定義WCF錯誤行爲

http://myservice/correct/url

，應返回的結果中JSON/XML

http://myservice/incorrect/url

，應返回一個自定義錯誤消息，而不是標準錯誤。

我讀了關於IErrorHandler接口，並擴展了WebHttpBehavior類。但不起作用。

來源

2011-07-08 davidshen84

最簡單的方法是定義操作來處理「Not Found」情況 - 通過使用'*'的UriTemplate（如果沒有其他模板匹配傳入的請求，它將匹配）。下面的代碼顯示了它的一個例子。

public class Post_0424d917_89cd_43c8_be70_5d4c6934b48c 
{ 
    [ServiceContract] 
    public interface ITest 
    { 
     [WebGet(UriTemplate = "/Echo?text={text}")] 
     string EchoGet(string text); 
     [WebInvoke(UriTemplate = "/Echo")] 
     string EchoPost(string text); 
     [WebGet(UriTemplate = "*")] 
     Stream ErrorForGet(); 
     [WebInvoke(UriTemplate = "*")] 
     Stream ErrorForPost(); 
    } 
    public class Service : ITest 
    { 
     public string EchoGet(string text) { return text; } 
     public string EchoPost(string text) { return text; } 
     public Stream ErrorForPost() { return this.ErrorForGet(); } 
     public Stream ErrorForGet() 
     { 
      WebOperationContext.Current.OutgoingResponse.StatusCode = HttpStatusCode.NotFound; 
      WebOperationContext.Current.OutgoingResponse.ContentType = "text/html"; 
      string result = @"<html> 
    <head> 
    <title>Resource not found</title> 
    </head> 
    <body> 
    <h1>This resource cannot be found</h1> 
    </body> 
</html>"; 
      return new MemoryStream(Encoding.UTF8.GetBytes(result)); 
     } 
    } 
    static void SendRequest(string uri, string method, string contentType, string body) 
    { 
     HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(uri); 
     req.Method = method; 
     if (!String.IsNullOrEmpty(contentType)) 
     { 
      req.ContentType = contentType; 
     } 

     if (body != null) 
     { 
      byte[] bodyBytes = Encoding.UTF8.GetBytes(body); 
      req.GetRequestStream().Write(bodyBytes, 0, bodyBytes.Length); 
      req.GetRequestStream().Close(); 
     } 

     HttpWebResponse resp; 
     try 
     { 
      resp = (HttpWebResponse)req.GetResponse(); 
     } 
     catch (WebException e) 
     { 
      resp = (HttpWebResponse)e.Response; 
     } 

     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(); 
     Console.WriteLine(new StreamReader(resp.GetResponseStream()).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(ITest), new WebHttpBinding(), "").Behaviors.Add(new WebHttpBehavior()); 
     host.Open(); 
     Console.WriteLine("Host opened"); 

     SendRequest(baseAddress + "/Echo?text=hello", "GET", null, null); 
     SendRequest(baseAddress + "/Echo", "POST", "application/json", "\"world\""); 

     SendRequest(baseAddress + "/NotFound", "GET", null, null); 
     SendRequest(baseAddress + "/NotFound", "POST", "text/xml", "<body/>"); 

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

來源

2011-07-08 16:59:29 carlosfigueira

如何自定義WCF錯誤行爲

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