| class ApplicationController < ActionController::Base | |
| protected | |
| def _log msg, is_json=false, level=:notice | |
| request.env[is_json ? 'firebug.logs_obj' : 'firebug.logs'] ||=[] | |
| request.env[is_json ? 'firebug.logs_obj' : 'firebug.logs'] = [[level.to_sym, (is_json ? msg.to_s.to_json : msg.to_s)]] | |
| end | |
| end |
| module Rack | |
| class FirebugLogger | |
| def initialize(app, options = {}) | |
| @app = app | |
| @options = options | |
| end | |
| def call(env) | |
| status, headers, orig_response = @app.call(env) | |
| return [status, headers, orig_response] unless (headers["Content-Type"] =~ /html/ && (env['firebug.logs'] || env['firebug.logs_obj'])) | |
| new_response = Rack::Response.new([], status, headers) | |
| js = "" | |
| if env['firebug.logs'] | |
| js = generate_js(env['firebug.logs']) | |
| end | |
| if env['firebug.logs_obj'] | |
| js = generate_js(env['firebug.logs_obj'], true) | |
| end | |
| if orig_response.body =~ /<body>/ | |
| orig_response.each do |line| | |
| line.gsub!("</body>", js + "\n</body>") | |
| new_response.write(line) | |
| end | |
| else | |
| new_response.write(orig_response.body + js) | |
| end | |
| new_response.finish | |
| end | |
| private | |
| def generate_js(logs, is_json=false) | |
| js = ["<script type=\"text/javascript\">"] | |
| start_group(js) | |
| logs.each do |level, log| | |
| level = sanitise_level(level) | |
| if is_json | |
| js << 'console.log(eval("("+'+log+'+")"))' | |
| else | |
| log.gsub!('"', '\"') | |
| js << "console.#{level.to_s}(\"#{log}\");" | |
| end | |
| end | |
| end_group(js) | |
| js << "</script>" | |
| js.join("\n") | |
| end | |
| def start_group(js) | |
| if @options[:group] | |
| js << "console.group(\"#{@options[:group]}\");" | |
| end | |
| end | |
| def sanitise_level(level) | |
| [:info, :debug, :warn, :error].include?(level) ? level : :debug | |
| end | |
| def end_group(js) | |
| if @options[:group] | |
| js << "console.groupEnd();" | |
| end | |
| end | |
| end | |
| end |
normal usage:
# from a controller
_log("test")
# helper or something
rails.env['firebug.logs'] = [[:notice, "test"]]
(object -> whatever that implements .to_json method in Rails):
# controller
_log( { :elo => "aha!" }.to_json, true)
# view, helper etc
rails.env['firebug.logs'] = [[:notice, {:elo => "aha!"}.to_json ]]