WCF HTTP/SOAP web服務 - 在故障返回異常消息

Question

我已經asimple WCF HTTP/SOAP的Web服務，該服務實現看起來是這樣的：現在

public CustomResponse DoSomething(CustomRequest request) 
{ 
    try 
    { 
     return InternalGubbins.WithErrorHandling.ProcessRequest(request); 
    } 
    catch 
    { 
     // Some sort of error occurred that is not gracefully 
     // handled elsewhere in the framework 
     throw new SoapException("Hmmm, it would seem that the cogs are meshed!", SoapException.ServerFaultCode); 
    } 
} 

，如果的SoapException拋出我想異常消息（即Hmmm, it would seem that the cogs are meshed!）將被返回給調用客戶端，而不需要任何額外的異常細節（即堆棧跟蹤）。

如果我將includeExceptionDetailInFaults設置爲true（服務器上的web.config），則帶有堆棧跟蹤等的完整異常將返回給客戶端。但是，如果我將它設置爲false，我得到一個通用的消息：

服務器無法處理請求 由於內部錯誤。有關錯誤 的更多信息， 上 IncludeExceptionDetailInFaults（無論是從ServiceBehaviorAttribute 或從 配置 行爲），以便在服務器上 或者反過來發送異常信息回 客戶端，或打開跟蹤按 Microsoft .NET Framework 3.0 SDK 文檔和檢查服務器 跟蹤日誌。

所以問題是，我怎樣才能讓我的SoapException消息返回到調用客戶端？即：

<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">http://schemas.microsoft.com/net/2005/12/windowscommunicationfoundation/dispatcher/fault</a:Action> 
     <a:RelatesTo>urn:uuid:185719f4-6113-4126-b956-7290be375342</a:RelatesTo> 
    </s:Header> 
    <s:Body> 
     <s:Fault> 
      <s:Code> 
       <s:Value>s:Receiver</s:Value> 
       <s:Subcode> 
        <s:Value xmlns:a="http://schemas.microsoft.com/net/2005/12/windowscommunicationfoundation/dispatcher">a:InternalServiceFault</s:Value> 
       </s:Subcode> 
      </s:Code> 
      <s:Reason> 
       <s:Text xml:lang="en-GB">Hmmm, it would seem that the cogs are meshed!</s:Text> 
      </s:Reason> 
     </s:Fault> 
    </s:Body> 
</s:Envelope> 

Answer 1

我認爲你需要聲明一個FaultContract的操作和使用FaultException（SoapException是前WCF）。我相信如果WCF不屬於服務合同的一部分，WCF不會將故障發回客戶端。我從來沒有嘗試SoapException，但肯定拋出一個FaultException對我來說一直工作正常。

[ServiceContract()]  
public interface ISomeService 
{ 
    [OperationContract] 
    [FaultContract(typeof(MyFault))] 
    CustomResponse DoSomething(CustomRequest request) 
} 

public class SomeService 
{ 
    public CustomResponse DoSomething(CustomRequest request) 
    { 
     ... 
     throw new FaultException<MyFault>(new MyFault()); 
    } 
} 

Answer 2

如果你不希望定義一個自定義異常類型，那麼試試這個

try  
{   
    return InternalGubbins.WithErrorHandling.ProcessRequest(request);  
}  
catch  
{ 
    throw new FaultException("Hmmm, it would seem that the cogs are meshed.");  
} 

這樣做會發送以下響應客戶端

<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/"> 
    <s:Header /> 
    <s:Body> 
    <s:Fault> 
     <faultcode>s:Client</faultcode> 
     <faultstring xml:lang="en-US">Hmmm, it would seem that the cogs are meshed.</faultstring> 
    </s:Fault> 
    </s:Body> 
</s:Envelope>