Caching .com files on the filesystem in Rails3 - ruby-on-rails

Question

I have a route like "http://example.com/sites/example.com"
get "/sites/:domainname", :to => 'controller#action', :constraints => { :domainname => /.*/ }
It works until the cached page public/sites/example.com generated (instead of public/sites/example.com.html), at which time it asks the user to save a .com file. How would I make the cached page saved as, e.g. public/sites/example.com.html? Or possibly have a different workaround.

Answer 1

The current workaround is to force the html extension in routes:
get "/sites/:domainname.html", :to => "sites#show", :as => :site, :constraints => { :domainname => /.*/ }
this results in public/sites/example.com.html being saved in the cache.

Answer 2

Looking at the source for, caches_page automatically assumes the extension of the cache file should be the "extension" it finds when the path contains a period (.). This logic is actually in another method, page_cache_file:
def page_cache_file(path, extension)
name = (path.empty? || path == "/") ? "/index" : URI.parser.unescape(path.chomp('/'))
unless (name.split('/').last || name).include? '.'
name << (extension || self.page_cache_extension)
end
return name
end
If needed, you could probably override this method to operate slightly differently within your controller, or else use the default ActionController::Base implementation. Here's a possible example:
class MyController < ApplicationController
class << self
private
# override the ActionController method
def page_cache_file(path, extension)
# use the default logic unless this is a /sites/:domainname request
# (may need to tweak the regex)
super unless path =~ %r{/sites/.*}
# otherwise customize logic to always include the extension
name = (path.empty? || path == "/") ? "/index" : URI.parser.unescape(path.chomp('/'))
name << (extension || self.page_cache_extension)
return name
end
end
end