Ubuntu → Apache → Phusion Passenger → Rails 2.3.
The main part of my site reacts to your clicks. So, if you click on a link, it will send you on to the destination, and instantly regenerate your page.
But, if you hit the back button, you don't see the new page. Unfortunately, it's not showing up without a manual refresh; it appears the browser is caching it. I want to make sure the browser does not cache the page.
Separately, I do want to set far-future expiration dates for all my static assets.
What's the best way to solve this? Should I solve this in Ruby on Rails? Apache? JavaScript?
Alas. Neither of these suggestions forced the behavior I'm looking for.
Maybe there's a JavaScript answer? I could have Ruby on Rails write out a timestamp in a comment, and then have the JavaScript code check to see if the times are within five seconds (or whatever works). If yes, then fine, but if no, then reload the page?
Do you think this would work?
ベストアンサー1
I finally figured this out - http://blog.serendeputy.com/posts/how-to-prevent-browsers-from-caching-a-page-in-rails/ in application_controller.rb.
After Ruby on Rails 5:
class ApplicationController < ActionController::Base
before_action :set_cache_headers
private
def set_cache_headers
response.headers["Cache-Control"] = "no-cache, no-store"
response.headers["Pragma"] = "no-cache"
response.headers["Expires"] = "Mon, 01 Jan 1990 00:00:00 GMT"
end
end
Ruby on Rails 4 and older versions:
class ApplicationController < ActionController::Base
before_filter :set_cache_headers
private
def set_cache_headers
response.headers["Cache-Control"] = "no-cache, no-store"
response.headers["Pragma"] = "no-cache"
response.headers["Expires"] = "Mon, 01 Jan 1990 00:00:00 GMT"
end
end