web api control注册及重写DefaultHttpControllerSelector、ApiControllerActionSelector、ApiControllerActionInvoker

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namespace EWorkpal.WebApi
{
public class HttpNotFoundDefaultHttpControllerSelector : DefaultHttpControllerSelector
{
public HttpNotFoundDefaultHttpControllerSelector(HttpConfiguration configuration)
: base(configuration)
{
}
public override HttpControllerDescriptor SelectController(HttpRequestMessage request)
{
HttpControllerDescriptor decriptor = null;
try
{
decriptor = base.SelectController(request);
}
catch (HttpResponseException ex)
{
var code = ex.Response.StatusCode;
var result = new EWorkResultInfo<object> { Code = , Entity = ex.Response.Content.ReadAsAsync<object>().Result };
if (code == HttpStatusCode.NotFound || code == HttpStatusCode.MethodNotAllowed)
{
ex.Response.Content = new ObjectContent(typeof(EWorkResultInfo), result, GlobalConfiguration.Configuration.Formatters.JsonFormatter);
}
throw;
}
return decriptor;
} } public class HttpNotFoundControllerActionSelector : ApiControllerActionSelector
{
public override HttpActionDescriptor SelectAction(HttpControllerContext controllerContext)
{
HttpActionDescriptor decriptor = null;
try
{
decriptor = base.SelectAction(controllerContext);
}
catch (HttpResponseException ex)
{
var code = ex.Response.StatusCode;
var result = new EWorkResultInfo<object> { Code = , Entity = ex.Response.Content.ReadAsAsync<object>().Result };
if (code == HttpStatusCode.NotFound || code == HttpStatusCode.MethodNotAllowed)
{
ex.Response.Content = new ObjectContent(typeof(EWorkResultInfo), result, GlobalConfiguration.Configuration.Formatters.JsonFormatter);
}
throw;
}
return decriptor;
}
} public class CustomApiControllerActionInvoker : ApiControllerActionInvoker
{
public override Task<HttpResponseMessage> InvokeActionAsync(HttpActionContext actionContext, CancellationToken cancellationToken)
{
var responseMessage = base.InvokeActionAsync(actionContext, cancellationToken); if (responseMessage.Exception != null)
{
var baseException = responseMessage.Exception.InnerExceptions[]; var result = new EWorkResultInfo<object>
{
Message = baseException.Message, //"服务器内部错误",
Code = ,
Entity = responseMessage.Exception
}; if (baseException is TimeoutException)
{
result.Code = ;
//result.Message = "任务超时";
} return Task.Run(() => new HttpResponseMessage()
{
Content = new ObjectContent(typeof(EWorkResultInfo<object>), result, GlobalConfiguration.Configuration.Formatters.JsonFormatter)
}, cancellationToken);
}
return responseMessage;
}
}
}

webapi.config

public static class WebApiConfig
{
/// <summary>
///
/// </summary>
/// <param name="config"></param>
public static void Register(HttpConfiguration config)
{
// Web API configuration and services
config.Filters.Add(new EWorkAuthorize());
config.Filters.Add(new ModelValidationFilterAttribute());
config.Services.Replace(typeof(IHttpActionInvoker), new CustomApiControllerActionInvoker());
config.Services.Replace(typeof(IHttpControllerSelector), new HttpNotFoundDefaultHttpControllerSelector(config));
config.Services.Replace(typeof(IHttpActionSelector), new HttpNotFoundControllerActionSelector()); // Web API routes
config.MapHttpAttributeRoutes(); config.Routes.MapHttpRoute(
name: "DefaultApi",
routeTemplate: "api/{controller}/{action}"//,//{id}
//defaults: new { id = RouteParameter.Optional }
); var xmlFormatter = config.Formatters.FirstOrDefault(m => m is XmlMediaTypeFormatter);
config.Formatters.Remove(xmlFormatter); config.Formatters.JsonFormatter.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver();
//config.Formatters.JsonFormatter.SerializerSettings.NullValueHandling = NullValueHandling.Ignore;
config.Formatters.JsonFormatter.SerializerSettings.DateFormatString = "yyyy-MM-dd hh:mm"; }
}