更改 Asp.net Core 中静态文件的标头

问题描述：

我正在使用包 Microsoft.AspNet.StaticFiles 并在 Startup.cs 中将其配置为 app.UseStaticFiles().如何更改已交付文件的标题?我想为图片、css 和 js 设置缓存过期等.

I am using package Microsoft.AspNet.StaticFiles and configuring it in Startup.cs as app.UseStaticFiles(). How can I change the headers of the delivered files ? I want to set cache expiry etc for images, css and js.

答

您可以使用 StaticFileOptions，它包含一个事件处理程序，在每次请求静态文件时调用该处理程序.

You can use StaticFileOptions, which contains an event handler that is called on each request of a static file.

您的 Startup.cs 应如下所示:

Your Startup.cs should look something like this:

// Add static files to the request pipeline.
app.UseStaticFiles(new StaticFileOptions()
{
    OnPrepareResponse = (context) =>
    {
        // Disable caching of all static files.
        context.Context.Response.Headers["Cache-Control"] = "no-cache, no-store";
        context.Context.Response.Headers["Pragma"] = "no-cache";
        context.Context.Response.Headers["Expires"] = "-1";
    }
});

当然，您可以修改上面的代码来检查内容类型，并且只修改 JS 或 CSS 或任何您想要的标题.

You can, of course, modify the above code to check the content type and only modify headers for JS or CSS or whatever you want.

更改 Asp.net Core 中静态文件的标头

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