#Rack::Headercontrol
Rack Middleware that allows you set/override response headers for selected paths
If you want to set headers for all responses, have a look at Rack::ResponseHeaders from rack-contrib
Conditions can be set using strings or regexes. It will execute the passed block for every condition that matches
##Usage
use Rack::Headercontrol do |change|
change.path '/tralala' do |headers|
headers['X-Foo'] = 'bar'
end
change.path /./ do |headers|
headers.delete('X-Baz')
end
# Serve CORS headers for webfonts to enable them in Firefox
change.path %r{\.(woff|ttf|otf)$} do |headers|
headers['Access-Control-Allow-Origin'] = '*'
end
# Set far-future expires headers for versioned assets
change.path %r{/style/longlived\.(.?)\.css} do |headers|
expires_at = 10.years.from_now.utc
max_age = (expires_at - Time.now).floor
headers['Expires'] = expires_at.rfc2822
headers['Cache-Control'] = "public, max-age=#{max_age}"
# Best practice not to send Etags /w far-future expiring assets
headers.delete('Etag')
headers.delete 'Pragma'
headers.delete 'Last-Modified'
end
end