使用 Sinatra、Thin、Rails 和 Rack::Cascade 时出现 Rack::Session:Cookie 错误

Question

我有一个组合的 Sinatra/Rails 应用程序，它使用 Rack::Session::Cookie 共享会话。当使用Rack::Handler::Thin.run app启动时，应用程序工作正常，但如果rackup文件以thin start启动，我会在Rack中收到错误： :Session::Cookie：

!! Unexpected error while processing request: no marshal_dump is defined for class Proc
no marshal_dump is defined for class Proc
 /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/session/cookie.rb:64:in `dump'
 /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/session/cookie.rb:64:in `commit_session'
 /usr/local/lib/ruby/gems/1.9.1/gems/rack-1.0.1/lib/rack/session/cookie.rb:38:in `call'
 /usr/local/lib/ruby/gems/1.9.1/gems/thin-1.2.5/lib/thin/connection.rb:76:in `block in pre_process'
 /usr/local/lib/ruby/gems/1.9.1/gems/thin-1.2.5/lib/thin/connection.rb:74:in `catch'
 /usr/local/lib/ruby/gems/1.9.1/gems/thin-1.2.5/lib/thin/connection.rb:74:in `pre_process'
 /usr/local/lib/ruby/gems/1.9.1/gems/thin-1.2.5/lib/thin/connection.rb:57:in `process'
 /usr/local/lib/ruby/gems/1.9.1/gems/thin-1.2.5/lib/thin/connection.rb:42:in `receive_data'
 /usr/local/lib/ruby/gems/1.9.1/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `run_machine'
 /usr/local/lib/ruby/gems/1.9.1/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `run'
 /usr/local/lib/ruby/gems/1.9.1/gems/thin-1.2.5/lib/thin/backends/base.rb:57:in `start'
 /usr/local/lib/ruby/gems/1.9.1/gems/thin-1.2.5/lib/thin/server.rb:156:in `start'
 /usr/local/lib/ruby/gems/1.9.1/gems/thin-1.2.5/lib/thin/controllers/controller.rb:80:in `start'
 /usr/local/lib/ruby/gems/1.9.1/gems/thin-1.2.5/lib/thin/runner.rb:177:in `run_command'
 /usr/local/lib/ruby/gems/1.9.1/gems/thin-1.2.5/lib/thin/runner.rb:143:in `run!'
 /usr/local/lib/ruby/gems/1.9.1/gems/thin-1.2.5/bin/thin:6:in `'

rackup 文件如下所示：

require ::File::dirname(__FILE__) + '/config/environment'
require 'thin'

app = Rack::Builder.new {
  use Rails::Rack::Static
  run Rack::Cascade.new([Sinatra::Application, ActionController::Dispatcher.new])
}.to_app

use Rack::Session::Cookie, :key => '_example', :domain => 'example.org',
  :secret => 'secret'

# have to use this
Rack::Handler::Thin.run app, :Port => 4000, :Host => "0.0.0.0"
# want to use: run app

Answer 1

您是否尝试过这样的操作：

app = Rack::Builder.new {
  use Rack::Session::Cookie, :key => '_example', :domain => 'example.org', :secret => 'secret'
  use Rails::Rack::Static
  run Rack::Cascade.new([Sinatra::Application, ActionController::Dispatcher.new])
}.to_app

看起来您的问题是您在 app 之外使用 Rack::Session::Cookie。