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