Question

我正在尝试api versioning使用header，但在different folder structure中如下所示。

在Controller folder V1内有CustomerController.cs个子文件夹和

在Controller folder V2

内的CustomerController.cs子文件夹中

当我使用URL上面的用户api版本工作正常。

我的问题是当我使用header尝试此方法时，它给出了以下错误：

{“消息”：“发生了错误。”，“ExceptionMessage”： “发现多个类型与名为'customer'的控制器相匹配。如果为此请求提供服务的路由，则会发生这种情况（'api / {controller} / {id}'）发现了多个控制器同名但不同的命名空间，不受支持。\ r \ n \ r \ n 请求'客户'找到以下匹配项控制器：\ r \ nApiVersion.Controllers.V1.CustomerController \ r \ nApiVersion.Controllers.V2.CustomerController“，”ExceptionType“：”System.InvalidOperationException“，”StackTrace“：” 在 System.Web.Http.Dispatcher.DefaultHttpControllerSelector.SelectController（HttpRequestMessage 请求）\ r \ n at System.Web.Http.Dispatcher.HttpControllerDispatcher.d__1.MoveNext（）” }

WebApiConfig.cs

 public static void Register(HttpConfiguration config)
        {
            config.MapHttpAttributeRoutes();
            config.Routes.MapHttpRoute(
                name: "DefaultApi",
                routeTemplate: "api/{controller}/{id}",
                defaults: new { id = RouteParameter.Optional }
            );
        }

CustomeControllerSelector.cs

        public override HttpControllerDescriptor SelectController(HttpRequestMessage request)
        {
            var controllers = GetControllerMapping();
            var routeData = request.GetRouteData();
            var controllerName = routeData.Values["controller"].ToString();
            //HttpControllerDescriptor controllerDescriptor;

            var version = GetVersionFromAcceptHeaderVersion(request);
            var controllerKey = String.Format(CultureInfo.InvariantCulture, "{0}.{1}",
                        version, controllerName);


            //if (controllers.TryGetValue(controllerName, out controllerDescriptor))
            // {

            if (!string.IsNullOrEmpty(version))
            {
                HttpControllerDescriptor versionedControllerDescriptor;
                if (controllers.TryGetValue(controllerKey, out versionedControllerDescriptor))
                {
                    return versionedControllerDescriptor;
                }
            }
            return null;
        }

          private string GetVersionFromAcceptHeaderVersion(HttpRequestMessage request)
        {
            var acceptHeader = request.Headers.Accept;
            foreach (var mime in acceptHeader)
            {
                if (mime.MediaType == "application/json" || mime.MediaType == "text/html")
                {
                    var version = mime.Parameters
                                    .Where(v => v.Name.Equals("version", StringComparison.OrdinalIgnoreCase))
                                    .FirstOrDefault();
                    if (version != null)
                    {
                        return version.Value;
                    }
                    return string.Empty;
                }
            }
            return string.Empty;
        }

Answer 1

我试过以下。截至目前工作 -

public class CustomControllerSelector : DefaultHttpControllerSelector
{
    //const string partName = "Webapi.Controllers";
    private readonly HttpConfiguration _config;

    public CustomControllerSelector(HttpConfiguration config)
        : base(config)
    {
        _config = config;
    }

    public override System.Web.Http.Controllers.HttpControllerDescriptor SelectController(HttpRequestMessage request)
    {
        var _route = request.GetRouteData();

        var controllerName = base.GetControllerName(request);

        var type = _config.Services.GetAssembliesResolver();
        var controlles = _config.Services.GetHttpControllerTypeResolver().GetControllerTypes(type);

        object name;
        _route.Values.TryGetValue("route", out name);

        //No more hard coding
        var partName = controllers.FirstOrDefault().Namespace;
        var st = name as string;
        if (st != null)
        {
            var conType = controlles.FirstOrDefault(a => a.Namespace == string.Format("{0}.{1}", partName, st));
                        if (conType != null)
                            return new System.Web.Http.Controllers.HttpControllerDescriptor(_config, controllerName, conType);
        }

        return base.SelectController(request);
    }
}

在WebApiConfig.cs中 -

config.Routes.MapHttpRoute(
            name: "DefaultApi",
            routeTemplate: "api/{controller}/{route}/{id}",
            defaults: new { id = RouteParameter.Optional }
        );

测试路线 -

http://localhost:60957/api/Another/Route/a
http://localhost:60957/api/Another/Route2/aaaaa

找到了与控制器匹配的多种类型

1 个答案: