# frozen_string_literal: true
module MessageBus::Rack; end
class MessageBus::Rack::Diagnostics
def initialize(app, config = {})
@app = app
@bus = config[:message_bus] || MessageBus
end
def js_asset(name)
return generate_script_tag(name) unless @bus.cache_assets
@@asset_cache ||= {}
@@asset_cache[name] ||= generate_script_tag(name)
@@asset_cache[name]
end
def generate_script_tag(name)
""
end
def file_hash(asset)
require 'digest/sha1'
Digest::SHA1.hexdigest(asset_contents(asset))
end
def asset_contents(asset)
File.open(asset_path(asset)).read
end
def asset_path(asset)
File.expand_path("../../../../assets/#{asset}", __FILE__)
end
def index
html = <
#{js_asset "jquery-1.8.2.js"}
#{js_asset "handlebars.js"}
#{js_asset "ember.js"}
#{js_asset "message-bus.js"}
#{js_asset "application.handlebars"}
#{js_asset "index.handlebars"}
#{js_asset "application.js"}
HTML
return [200, { "content-type" => "text/html;" }, [html]]
end
def translate_handlebars(name, content)
"Ember.TEMPLATES['#{name}'] = Ember.Handlebars.compile(#{indent(content).inspect});"
end
# from ember-rails
def indent(string)
string.gsub(/$(.)/m, "\\1 ").strip
end
def call(env)
return @app.call(env) unless env['PATH_INFO'].start_with? '/message-bus/_diagnostics'
route = env['PATH_INFO'].split('/message-bus/_diagnostics')[1]
if @bus.is_admin_lookup.nil? || !@bus.is_admin_lookup.call(env)
return [403, {}, ['not allowed']]
end
return index unless route
if route == '/discover'
user_id = @bus.user_id_lookup.call(env)
@bus.publish('/_diagnostics/discover', user_id: user_id)
return [200, {}, ['ok']]
end
if route =~ /^\/hup\//
hostname, pid = route.split('/hup/')[1].split('/')
@bus.publish('/_diagnostics/hup', hostname: hostname, pid: pid.to_i)
return [200, {}, ['ok']]
end
asset = route.split('/assets/')[1]
if asset && !asset !~ /\//
content = asset_contents(asset)
split = asset.split('.')
if split[1] == 'handlebars'
content = translate_handlebars(split[0], content)
end
return [200, { 'content-type' => 'text/javascript;' }, [content]]
end
return [404, {}, ['not found']]
end
end