WCF HTTP 504 错误

Question

我有以下问题。我正在使用 Entity Framework 连接到 SQL Azure 并且可以正常工作(我在测试项目中对其进行了测试)。

但是当我尝试通过 WCF RESTful 服务获取它时，它会抛出错误 504。

我的运营契约(Contract):

[ServiceContract]
public interface IService
{
    [OperationContract]
    [WebGet(UriTemplate = "/Artikli", ResponseFormat = WebMessageFormat.Json)]
    IEnumerable<Artikal> GetArtikli();
}

[ServiceContract] 的实现:

public class Service : IService
{
    public IEnumerable<Artikal> GetArtikli()
    {
        using (var context = new CijenolomciEntities())
        {
            var result = context.Artikals.ToList();
            result.ForEach(a => context.Detach(a));
            return result;
        }

    }
}

整个事情都托管在本地 IIS 上。我使用 Fiddler，当我尝试到达时它会说什么

http://localhost:17916/Service.svc/Artikli 

是

[Fiddler] ReadResponse() 失败:服务器未返回对此请求的响应。

WCF App.Config 看起来像:

    <?xml version="1.0"?>
    <configuration>
        <connectionStrings>
            <add name="CijenolomciEntities" connectionString="My_Connection_String" providerName="System.Data.EntityClient" />
        </connectionStrings>

        <system.web>
        <compilation debug="true" targetFramework="4.0" />
        </system.web>

        <system.serviceModel>
            <protocolMapping>
                <add scheme="http" binding="webHttpBinding" />
            </protocolMapping>
            <behaviors>
                <endpointBehaviors>
                    <behavior>
                        <webHttp />
                    </behavior>
                </endpointBehaviors>
            <serviceBehaviors>
            <behavior>
                <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
                <serviceMetadata httpGetEnabled="true"/>
                <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->
                <serviceDebug includeExceptionDetailInFaults="false"/>
            </behavior>
            </serviceBehaviors>
        </behaviors>
        <serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
        </system.serviceModel>

        <system.webServer>
        <modules runAllManagedModulesForAllRequests="true"/>
        </system.webServer>

    </configuration>

编辑:当我尝试通过浏览器访问 URL 时，我得到以下信息:

Request Error

The server encountered an error processing the request. See server logs for more details.

Answer 1

尝试启用Tracing并查看您的请求是否超出了您收到超时错误的默认值。

检查跟踪日志以了解失败原因的详细错误，然后适本地执行所需的步骤以增加超时值或默认大小限制