discourse/app/controllers/theme_javascripts_controlle...

122 lines
3.3 KiB
Ruby

# frozen_string_literal: true
class ThemeJavascriptsController < ApplicationController
DISK_CACHE_PATH = "#{Rails.root}/tmp/javascript-cache"
TESTS_DISK_CACHE_PATH = "#{Rails.root}/tmp/javascript-cache/tests"
skip_before_action(
:check_xhr,
:handle_theme,
:preload_json,
:redirect_to_login_if_required,
:verify_authenticity_token,
only: %i[show show_map show_tests],
)
before_action :is_asset_path, :no_cookies, :apply_cdn_headers, only: %i[show show_map show_tests]
def show
raise Discourse::NotFound unless last_modified.present?
return render body: nil, status: 304 if not_modified?
# Security: safe due to route constraint
cache_file = "#{DISK_CACHE_PATH}/#{params[:digest]}.js"
write_if_not_cached(cache_file) do
content, has_source_map = query.pluck_first(:content, "source_map IS NOT NULL")
if has_source_map
content +=
"\n//# sourceMappingURL=#{params[:digest]}.map?__ws=#{Discourse.current_hostname}\n"
end
content
end
serve_file(cache_file)
end
def show_map
raise Discourse::NotFound unless last_modified.present?
return render body: nil, status: 304 if not_modified?
# Security: safe due to route constraint
cache_file = "#{DISK_CACHE_PATH}/#{params[:digest]}.map"
write_if_not_cached(cache_file) { query.pluck_first(:source_map) }
serve_file(cache_file)
end
def show_tests
digest = params[:digest]
raise Discourse::NotFound if !digest.match?(/\A\h{40}\z/)
theme = Theme.find_by(id: params[:theme_id])
raise Discourse::NotFound if theme.blank?
content, content_digest = theme.baked_js_tests_with_digest
raise Discourse::NotFound if content.blank? || content_digest != digest
@cache_file = "#{TESTS_DISK_CACHE_PATH}/#{digest}.js"
return render body: nil, status: 304 if not_modified?
write_if_not_cached(@cache_file) { content }
serve_file @cache_file
end
private
def query
@query ||= JavascriptCache.where(digest: params[:digest]).limit(1)
end
def last_modified
@last_modified ||=
begin
if params[:action].to_s == "show_tests"
File.exist?(@cache_file) ? File.ctime(@cache_file) : nil
else
query.pluck_first(:updated_at)
end
end
end
def not_modified?
cache_time =
begin
Time.rfc2822(request.env["HTTP_IF_MODIFIED_SINCE"])
rescue ArgumentError
nil
end
cache_time && last_modified && last_modified <= cache_time
end
def set_cache_control_headers
if Rails.env.development?
response.headers["Last-Modified"] = Time.zone.now.httpdate
immutable_for(1.second)
else
response.headers["Last-Modified"] = last_modified.httpdate if last_modified
immutable_for(1.year)
end
end
def write_if_not_cached(cache_file)
unless File.exist?(cache_file)
content = yield
raise Discourse::NotFound if content.nil?
FileUtils.mkdir_p(File.dirname(cache_file))
File.write(cache_file, content)
end
end
def serve_file(cache_file)
# this is only required for NGINX X-SendFile it seems
response.headers["Content-Length"] = File.size(cache_file).to_s
set_cache_control_headers
type = cache_file.end_with?(".map") ? "application/json" : "text/javascript"
send_file(cache_file, type: type, disposition: :inline)
end
end