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55a1394342
Doing .pluck(:column).first is a very common pattern in Discourse and in most cases, a limit cause isn't being added. Instead of adding a limit clause to all these callsites, this commit adds two new methods to ActiveRecord::Relation: pluck_first, equivalent to limit(1).pluck(*columns).first and pluck_first! which, like other finder methods, raises an exception when no record is found
68 lines
1.7 KiB
Ruby
68 lines
1.7 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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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: [:show]
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)
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before_action :is_asset_path, :no_cookies, only: [:show]
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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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unless File.exist?(cache_file)
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content = query.pluck_first(:content)
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raise Discourse::NotFound if content.nil?
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FileUtils.mkdir_p(DISK_CACHE_PATH)
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File.write(cache_file, content)
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end
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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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send_file(cache_file, disposition: :inline)
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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 ||= query.pluck_first(:updated_at)
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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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end
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