discourse/app/controllers/highlight_js_controller.rb
Vinoth Kannan af4938baf1
Revert "DEV: enable cors to all cdn get requests from workbox. (#10684)" (#11076)
This reverts commit e3de45359f.

We need to improve out strategy by adding a cache breaker with this change ... some assets on CDNs and clients may have incorrect CORS headers which can cause stuff to break.
2020-10-30 16:05:35 +11:00

44 lines
1.5 KiB
Ruby

# frozen_string_literal: true
class HighlightJsController < ApplicationController
skip_before_action :preload_json, :redirect_to_login_if_required, :check_xhr, :verify_authenticity_token, only: [:show]
def show
no_cookies
RailsMultisite::ConnectionManagement.with_hostname(params[:hostname]) do
current_version = HighlightJs.version(SiteSetting.highlighted_languages)
if current_version != params[:version]
return redirect_to path(HighlightJs.path)
end
# note, this can be slightly optimised by caching the bundled file, it cuts down on N reads
# our nginx config caches this so in practical terms it does not really matter and keeps
# code simpler
languages = SiteSetting.highlighted_languages.split('|')
# TODO: some languages require to be loaded before others
# this limitation should be fixed in highlight js 11, remove it when available
prepended_languages = ['csharp', 'c', 'c-like']
prepended_languages.each do |lang|
if languages.include?(lang)
languages.insert(0, languages.delete(lang))
else
languages.insert(0, lang)
end
end
highlight_js = HighlightJs.bundle(languages)
response.headers["Last-Modified"] = 10.years.ago.httpdate
response.headers["Content-Length"] = highlight_js.bytesize.to_s
immutable_for 1.year
render plain: highlight_js, disposition: nil, content_type: 'application/javascript'
end
end
end