discourse/app/controllers/highlight_js_controller.rb
Joffrey JAFFEUX de038c0eab
FIX: highlightjs 10 requires some languages to be loaded before others (#10584)
cs is also not present in 10 and relies only on csharp file, but for cs alias to work csharp has to be loaded.
2020-09-02 21:32:57 +02:00

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