c# - 捕获对 Web Api 2.0 的所有请求，无论是否已映射

Question

我有一个运行在 localhost:4512 的 Web API 2.0，我想拦截对域 localhost:4512 发出的所有请求，无论它们是否由特定路由处理或不。例如，我想捕获对 localhost:4512/abc.dfsada 或 localhost:4512/meh/abc.js

的请求

我已经用 DelegatingHandler 试过了，但是 unfortunately这只会拦截对已处理路由的请求:

public class ProxyHandler : DelegatingHandler
{
    private async Task<HttpResponseMessage> RedirectRequest(HttpRequestMessage request, CancellationToken cancellationToken)
    {
        var redirectLocation = "http://localhost:54957/";
        var localPath = request.RequestUri.LocalPath;
        var client = new HttpClient();
        var clonedRequest = await request.Clone();
        clonedRequest.RequestUri = new Uri(redirectLocation + localPath);

        return await client.SendAsync(clonedRequest, HttpCompletionOption.ResponseHeadersRead, cancellationToken);
    }

    protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
    {
        return RedirectRequest(request, cancellationToken);
    }
}

在 WebConfig.cs 中:

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

Answer 1

您可以在 Global.asax 类中使用 Application_BeginRequest 方法。当应用程序收到请求时，它会首先被调用

这是一个例子:

protected void Application_BeginRequest(object sender, EventArgs e)
{
    var request = ((System.Web.HttpApplication) sender).Request;
}