CSS 文件被阻止:MIME 类型不匹配(X-Content-Type-Options: nosniff) [英] CSS file blocked: MIME type mismatch (X-Content-Type-Options: nosniff)

问题描述

我正在开发一个 Angular 4 应用程序，我想应用一些全局样式.按照 angular 站点上的教程，我创建了一个样式.css"文件在我的应用程序的根目录中，我指的是我的应用程序的 index.html 中的那个样式表:

I am developing an Angular 4 app and I want to apply some global styles. Following the tutorial at the angular site, I've created a "styles.css" file in the root directory of my app, and I'm referring to that stylesheet in the index.html of my app:

<link rel="stylesheet" type="text/css" href="styles.css">

angular 应用编译成功:

The angular app is successfully compiled:

$ ng serve 
** NG Live Development Server is listening on localhost:4200, open your browser on http://localhost:4200 **
[...]
webpack: Compiled successfully.

但是当我在 Chromium 浏览器中访问 http://localhost:4200 时，控制台在

But when I visit http://localhost:4200 in a Chromium browser, the console shows an error at

GET http://localhost:4200/styles.css 

在 Firefox 浏览器中，错误更加明确:

In a Firefox browser, the error is a bit more explicit:

GET 
http://localhost:4200/styles.css [HTTP/1.1 404 Not Found 15ms]
The resource from "http://localhost:4200/styles.css" was blocked due to MIME type mismatch (X-Content-Type-Options: nosniff).

index.html 和styles.css 这两个文件都位于我的angular 应用程序的根目录中.我试图获得 更多信息问题:

Both files, index.html and styles.css are located in the root directory of my angular app. I've tried to get more info about the problem :

nosniff
    Blocks a request if the requested type is

        "style" and the MIME type is not "text/css", or
        "script" and the MIME type is not a JavaScript MIME type.

但我不明白为什么它会阻塞请求，因为我在引用样式表时指定了 type="text/css".

But I don't understand why it's bloking the request, since I've specified type="text/css" when referencing the stylesheet.

推荐答案

我刚刚遇到了同样的问题.这似乎是 Express 的一个怪癖，从搜索的点击次数判断，它可能出于多种不同的原因而表现出来nodejs 表达 css mime 类型"的网页.

I just ran into the same issue. It appears to be a quirk of Express that can manifest itself for a few different reasons, judging by the number of hits from searching the web for "nodejs express css mime type".

尽管我们在 <link 元素中添加了 type="text/css" 属性，但 Express 将 CSS 文件返回为

Despite the type="text/css" attribute we put in our <link elements, Express is returning the CSS file as

Content-Type: "text/html; charset=utf-8"

而它确实应该将其返回为

whereas it really should be returning it as

Content-Type: "text/css"

对我来说，快速而肮脏的解决方法是简单地删除 rel= 属性，即更改

For me, the quick and dirty workaround was to simply remove the rel= attribute, i.e., change

<link rel="stylesheet" type="text/css" href="styles.css">

到

<link type="text/css" href="styles.css">

测试确认已下载 CSS 文件并且样式确实有效，这对我的目的来说已经足够了.

Testing confirmed that the CSS file was downloaded and the styles did actually work, and that was good enough for my purposes.

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