在Asp.net Core中更改静态文件的标题 [英] Change the headers of static files in Asp.net Core

问题描述

我正在使用软件包Microsoft.AspNet.StaticFiles，并将其在Startup.cs中配置为app.UseStaticFiles().如何更改已交付文件的标题?我想为图片，css和js设置缓存过期时间.

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.

推荐答案

您可以使用StaticFileOptions，它包含一个在静态文件的每个请求上调用的事件处理程序.

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

您的Startup.cs应该看起来像这样:

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";
    }
});

您当然可以修改上面的代码以检查内容类型，并且只修改JS或CSS或任何所需的标头.

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.

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