忽略中间件中的请求

Question

所以我希望 IIS 在请求某些 URL 时基本上不做任何事情，因为我想要从服务器端呈现到的 React 路由器来处理请求。

用过这个

我创建了一个检查每个请求的中间件。现在我不知道如何在找到正确的网址后忽略或中止此请求。

public class IgnoreRouteMiddleware
{

    private readonly RequestDelegate next;

    // You can inject a dependency here that gives you access
    // to your ignored route configuration.
    public IgnoreRouteMiddleware(RequestDelegate next)
    {
        this.next = next;
    }

    public async Task Invoke(HttpContext context)
    {
        if (context.Request.Path.HasValue &&
            context.Request.Path.Value!="/")
        {


           // cant stop anything here. Want to abort to ignore this request

        }

        await next.Invoke(context);
    }
}

Answer 1

如果要停止请求，请不要调用 next.Invoke(context)，因为这将调用管道中的下一个中间件。不调用它，只是结束请求（并且将处理next.Invoke(context)之后的先前中间件代码）。

在你的情况下，只需将调用移至 else 分支或否定 if 表达式

public class IgnoreRouteMiddleware
{

    private readonly RequestDelegate next;

    // You can inject a dependency here that gives you access
    // to your ignored route configuration.
    public IgnoreRouteMiddleware(RequestDelegate next)
    {
        this.next = next;
    }

    public async Task Invoke(HttpContext context)
    {
        if (!(context.Request.Path.HasValue && context.Request.Path.Value!="/"))
        {
            await next.Invoke(context);
        }
    }
}

另请务必阅读 ASP.NET Core Middleware 文档以更好地了解中间件的工作原理。

Middleware is software that is assembled into an application pipeline to handle requests and responses. Each component:

Chooses whether to pass the request to the next component in the pipeline.

Can perform work before and after the next component in the pipeline is invoked.

但如果您想要服务器端呈现，请考虑使用 Microsoft 的 JavaScript/SpaServices 库，该库已内置在较新的模板中 (ASP.NET Core 2.0.x)并注册后备路线，例如。

app.UseMvc(routes =>
{
    routes.MapRoute(
        name: "default",
        template: "{controller=Home}/{action=Index}/{id?}");

    routes.MapSpaFallbackRoute(
        name: "spa-fallback",
        defaults: new { controller = "Home", action = "Index" });
});

新模板还支持模块热替换

忽略中间件中的请求

Ignoring Request in middleware

reactjs.net

asp.net-core

react-router-v4