什么在config.ru上为heroku上的非rails应用程序？

Question

我有一个简单的红宝石(非rails)应用程序使用resque,并没有启动没有config.ru在heroku上.当我添加config.ru文件时,我在rackup本地运行时收到以下错误:

/usr/local/Cellar/ruby/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.5.2/lib/rack/builder.rb:133:in `to_app': missing run or map statement (RuntimeError)
from /Users/nickkarrasch/Dropbox/Coding/Ruby/smsnotifyv2/config.ru:in `<main>'
from /usr/local/Cellar/ruby/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.5.2/lib/rack/builder.rb:49:in `eval'
from /usr/local/Cellar/ruby/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.5.2/lib/rack/builder.rb:49:in `new_from_string'
from /usr/local/Cellar/ruby/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.5.2/lib/rack/builder.rb:40:in `parse_file'
from /usr/local/Cellar/ruby/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.5.2/lib/rack/server.rb:277:in `build_app_and_options_from_config'
from /usr/local/Cellar/ruby/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.5.2/lib/rack/server.rb:199:in `app'
from /usr/local/Cellar/ruby/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.5.2/lib/rack/server.rb:314:in `wrapped_app'
from /usr/local/Cellar/ruby/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.5.2/lib/rack/server.rb:250:in `start'
from /usr/local/Cellar/ruby/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.5.2/lib/rack/server.rb:141:in `start'
from /usr/local/Cellar/ruby/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rack-1.5.2/bin/rackup:4:in `<top (required)>'
from /usr/local/Cellar/ruby/1.9.3-p194/bin/rackup:23:in `load'
from /usr/local/Cellar/ruby/1.9.3-p194/bin/rackup:23:in `<main>'

我需要在config.ru中放入什么？

Answer 1

该文件(config.ru)的内容将取决于您实际尝试做什么以及您正在使用的框架,因为它仅用于配置Rack应用程序,它告诉Rack::Builder应该使用什么中间件以及使用哪个顺序.这些是Heroku文档中提供的用于部署机架应用程序的一些示例.:

Sinatra:

require './hello'
run Sinatra::Application

拉马兹:

require ::File.expand_path('./../hello', __FILE__)
Ramaze.start(:file => __FILE__, :started => true)
run Ramaze

露营

require './hello'
run Rack::Adapter::Camping.new(Hello)