public static class PreRouteHandler
{
public static void HttpPreRoute(this HttpConfiguration config)
{
config.Services.Replace(typeof(IHttpActionInvoker), new HttpWebApiControllerActionInvoker());
config.Services.Replace(typeof(IHttpControllerSelector), new HttpNotFoundDefaultHttpControllerSelector(config));
config.Services.Replace(typeof(IHttpActionSelector), new HttpNotFoundControllerActionSelector());
}
}
public class HttpNotFoundDefaultHttpControllerSelector : DefaultHttpControllerSelector
{
JsonMediaTypeFormatter formatter = new JsonMediaTypeFormatter();
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 OutResult() { code = OutCode.失败, msg = "无效请求" };
if (code == HttpStatusCode.NotFound || code == HttpStatusCode.MethodNotAllowed)
{
ex.Response.Content = new ObjectContent(typeof(OutResult), result, formatter);
}
ex.Response.StatusCode = HttpStatusCode.OK;
throw;
}
return decriptor;
}
}
public class HttpNotFoundControllerActionSelector : ApiControllerActionSelector
{
JsonMediaTypeFormatter formatter = new JsonMediaTypeFormatter();
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 OutResult() { code = OutCode.失败, msg = "无效请求" };
if (code == HttpStatusCode.NotFound || code == HttpStatusCode.MethodNotAllowed)
{
ex.Response.Content = new ObjectContent(typeof(OutResult), result, formatter);
}
ex.Response.StatusCode = HttpStatusCode.OK;
throw ex;
}
return decriptor;
}
}
public class HttpWebApiControllerActionInvoker : ApiControllerActionInvoker
{
JsonMediaTypeFormatter formatter = new JsonMediaTypeFormatter();
public override Task<HttpResponseMessage> InvokeActionAsync(HttpActionContext actionContext, CancellationToken cancellationToken)
{
var responseMessage = base.InvokeActionAsync(actionContext, cancellationToken);
if (responseMessage.Exception != null)
{
var baseException = responseMessage.Exception.InnerExceptions[0];
var result = new OutResult() { code = OutCode.失败, msg = "无效请求" };
if (baseException is TimeoutException)
{
result.code = OutCode.请求超时;
result.msg = "请求超时";
}
return Task.Run(() => new HttpResponseMessage()
{
Content = new ObjectContent(typeof(OutResult), result, formatter),
StatusCode = HttpStatusCode.OK
}, cancellationToken);
}
return responseMessage;
}
}
WebApiConfig中:
public static void Register(HttpConfiguration config)
{
GlobalConfiguration.Configuration.Formatters.XmlFormatter.SupportedMediaTypes.Clear();
GlobalConfiguration.Configuration.Formatters.JsonFormatter.MediaTypeMappings.Add(new QueryStringMapping("datatype", "json", "application/json"));
GlobalConfiguration.Configuration.Formatters.JsonFormatter.SerializerSettings.Converters.Add(
new Newtonsoft.Json.Converters.IsoDateTimeConverter()
{
DateTimeFormat = "yyyy-MM-dd HH:mm:ss"
}
);
config.Filters.Add(new OutResultAttribute());
config.Filters.Add(new GlobalExceptionFilter());
config.EnableCors();
// Web API 配置和服务
// Web API 路由
config.MapHttpAttributeRoutes();
config.Routes.MapHttpRoute(
name: "DefaultApi",
routeTemplate: "{controller}/{action}/{id}",
defaults: new { id = RouteParameter.Optional }
);
config.HttpPreRoute();//此处新增
}
本文转自94cool博客园博客，原文链接：http://www.cnblogs.com/94cool/p/6876970.html，如需转载请自行联系原作者
