MVC 路由 - 通配符 URL，但受限制

Question

我基本上想这样做：

routes.MapRoute(
  "Pass-through",
  "/api/{*url}",
  new { controller = "PassThrough", action = "PassThroughToApi" });

我将请求发送到的控制器有：

public ContentResult PassThroughToApi(string url = null)

但是，我希望能够同时限制 URL。如：

routes.MapRoute(
  "Pass-through",
  "/api/v1/some/specific/address/{whatever}/{parameters}",
  new { controller = "PassThrough", action = "PassThroughToApi" });

但我仍然希望控制器将请求的 URL 作为变量获取，并且我不关心获取实际参数，只要 URL 与模式匹配即可。还是我应该从其他地方（例如上下文）获取请求的 URL，而不是作为参数传递给它？

Answer 1

您可以创建custom route constraint

public class ApiRedirectingConstraint : IRouteConstraint
{
    private string _matchUrl;

    public ApiRedirectingConstraint(string matchUrl)
    {
        _matchUrl = matchUrl;
    }

    public bool Match(HttpContextBase httpContext, Route route, string parameterName, RouteValueDictionary values, RouteDirection routeDirection)
    {
        string url = (string)values["url"];

        bool isMatch = true;
        //check url for specific match with _matchUrl

        return isMatch;
    }
}

并将其分配给Pass-through 路由

routes.MapRoute(
    "Pass-through",
    "/api/{*url}",
    new { controller = "PassThrough", action = "PassThroughToApi" },
    new { apiRedirect = new ApiRedirectingConstraint("/api/v1/some/specific/address/{whatever}/{parameters}") }
);