app.UseMiddleware< T>（）导致500 [英] app.UseMiddleware<T>() causing 500

问题描述

如果我直接在 startup.cs 中调用中间件，例如：

If I call the middleware directly in my startup.cs, e.g.:

public void Configure(IApplicationBuilder app)
{
    app.UseMiddleware<StaticFileMiddleware>();
    app.UseMiddleware<DefaultFilesMiddleware>();
}

查看源代码，这正是扩展方法正在调用的代码。但是，我遇到了500错误和堆栈跟踪：

Looking at the source on GitHub, this is exactly the code that the extension methods are calling. However, I'm getting a 500 error and a stack trace:

 :(
Oops.
500 Internal Server Error
System.InvalidOperationException
The 'Invoke' method's first argument must be of type 'HttpContext'.
at Microsoft.AspNetCore.Builder.<>c__DisplayClass3_0.<UseMiddleware>b__0(RequestDelegate next)
at Microsoft.AspNetCore.Builder.Internal.ApplicationBuilder.Build()
at Microsoft.AspNetCore.Hosting.Internal.WebHost.BuildApplication()

Show raw exception details

System.InvalidOperationException: The 'Invoke' method's first argument must be of type 'HttpContext'.
   at Microsoft.AspNetCore.Builder.UseMiddlewareExtensions.<>c__DisplayClass3_0.b__0(RequestDelegate next)
   at Microsoft.AspNetCore.Builder.Internal.ApplicationBuilder.Build()
   at Microsoft.AspNetCore.Hosting.Internal.WebHost.BuildApplication()

此可能与我的没有可引用的静态文件扩展名问题。

无论哪种方式，我目前都无法获得一个简单的 index.html 页面来成功加载。

Either way, I currently can't get a simple index.html page to load successfully.

任何帮助？

谢谢

推荐答案

您可能正在使用RC1版本

You're probably using the RC1 version of the StaticFiles library inside of your project, instead of RC2.

在项目内部的StaticFiles库中，而不是RC2。在 project.json 中，更改以下内容：

In project.json, change this:

"dependencies": {
   "Microsoft.AspNet.StaticFiles": "1.0.0-rc1-final"
}

为此：

"dependencies": {
   "Microsoft.AspNetCore.StaticFiles": "1.0.0-rc2-final"
}

名称空间也已更改，但是一旦更正，您应该可以

The namespace also changed, but once that's corrected you should be good to go.

这篇关于app.UseMiddleware< T>（）导致500的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！