如何在 Heroku 上托管的 Sinatra 应用程序中设置 HTTP 响应（缓存）标头
我有一个相当简单的应用程序（只有一个 index.html 文件和一个 css 文件 - 它实际上只是一个静态页面）托管在 Heroku 上。
我使用 Sinatra 在 Heroku 上托管它。 “应用程序”本身相当简单：
require 'rubygems'
require 'sinatra'
get "/" do
File.read(File.join('public', 'index.html'))
end
问题是，如何设置静态资源的 HTTP 响应标头？特别是，我想设置 Expires 标头以进行缓存。
编辑：我希望将上述标头添加到静态资产中（即位于 /public 下的标头，如背景图像、图标等）
I have a fairly simple app (just one index.html file and a css file - it really is just a static page) hosted on Heroku.
I use Sinatra to host it on Heroku. The 'app' itself is fairly simple:
require 'rubygems'
require 'sinatra'
get "/" do
File.read(File.join('public', 'index.html'))
end
The question is, how do I set the HTTP response header for the static assets? In particular, I wanted to set the Expires header for caching purposes.
EDIT: I'm looking to add the said header to the static assets (ie, the one that resides under /public, like background images, icons, etc)
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除了我不会仅仅为了提供静态文件而通过 Sinatra 堆栈这一事实之外，您还需要调用
缓存一分钟。
cache_control是 Sinatra 附带的 帮助程序。否则，我建议您查看 http://www.sinatrarb.com/configuration.html< /a> 查看 Sinatra 的设置方式，这样您就不必处理提供静态文件的问题。
希望这有帮助。
编辑：我刚刚看到您明确要求
Expires标头。我不确定，但这应该与 Cache-Control 完全相同。抱歉造成混乱Apart from the fact that I wouldn't get through the Sinatra stack just to serve static files, you'd call
to cache for a minute.
cache_controlis a helper that comes with Sinatra.Otherwise, I'd suggest you have a look at http://www.sinatrarb.com/configuration.html to see how Sinatra is set up so you don't have do deal with serving static files.
Hope this helps.
edit: I just saw you were explicitly asking for the
Expiresheader. I'm not sure, but that should be fairly the same way asCache-Control. Sorry for the confusion作为对 @awendt 答案的扩展，Sinatra 实际上可以处理静态文件，而无需显式定义路由并打印文件。
通过添加：
..您可以将
index.html和stylesheet.css添加到public/文件夹。然后，当您访问 http://localhost:9292/stylesheet.css 时，您将获得静态文件。如果您想使用其他文件夹名称，而不是默认的
public/，请尝试：如果我们想不那么明确，我们可以在无论如何，Sinatra 都会为我们启用
:static:)来源： http://www.sinatrarb.com/configuration.html#__enabledisable_static_file_routes
As an expansion to @awendt's answer, Sinatra can actually handle static files with out needing to explicitly define the route and print the file.
By adding:
..you can add your
index.htmlandstylesheet.cssto apublic/folder. Then when you visithttp://localhost:9292/stylesheet.cssyou'll be provided with the static file.If you want to use another folder name, instead of the default
public/, then try:If we want to be less explicit we can just create the
public/folder in the knowledge that Sinatra will enable:staticfor us anyway :)Source: http://www.sinatrarb.com/configuration.html#__enabledisable_static_file_routes