您可以将thin与ActionController::Live一起使用来实施服务器端事件（SSE）和长轮询吗？如果是这样，怎么样？
虽然标题是How to get Rails 4 ActionController::Live streaming working with Thin and Ruby 2? And how do Thin and Puma scale with live streaming?的重复，但是OP通过提出两个问题来混淆水域，这个问题从来没有得到解答。
如果您通过thin：Does Heroku support ActionController::Live?和Is puma the ONLY multi-threaded rails 4 http server?启动服务器端事件（sse），其他一些帖子建议您可以使用exec thin start --threaded，Aaron的开创性{ {3}}和Ryan的常年可靠http://tenderlovemaking.com/2012/07/30/is-it-live.html。但即使我正在复制Railscast示例，我也无法使用thin。
# ----------------------------------------------------------------
# file: config/routes.rb
Rails.application.routes.draw do
resources :widgets do
collection do
get 'events' # SSE test
end
end
end
_
# ----------------------------------------------------------------
# file: config/environments/development.rb
Rails.application.configure do
... snip ...
# see http://tenderlovemaking.com/2012/07/30/is-it-live.html
config.preload_frameworks = true
config.allow_concurrency = true
end
_
# ----------------------------------------------------------------
# file: app/controllers/widgets_controller.rb
class WidgetsController < ApplicationController
include ActionController::Live
# GET /widgets/events
# see http://railscasts.com/episodes/401-actioncontroller-live?view=asciicast
def events
# SSE expects the `text/event-stream` content type
response.headers['Content-Type'] = 'text/event-stream'
3.times do |n|
response.stream.write "#{n}...\n\n"
sleep 2
end
ensure
response.stream.close
end
end
_
# ----------------------------------------------------------------
# Gemfile
source 'https://rubygems.org'
gem 'rails', '4.1.8'
gem 'pg'
... snip ...
gem 'thin'
在shell窗口A：
$ bundle install
Chalcedony[~/Projects/heroku-sample/widget-worker]$ thin start --threaded --trace
Using rack adapter
Thin web server (v1.6.3 codename Protein Powder)
Tracing ON
Maximum connections set to 1024
Listening on 0.0.0.0:3000, CTRL+C to stop
然后在shell窗口B：
$ curl --no-buffer localhost:3000/widgets/events
回到shell窗口A我看到请求，并且响应以一秒的间隔吐出（0...和1...和2...之间有一秒钟的延迟。这很好：
GET /widgets/events HTTP/1.1
User-Agent: curl/7.37.1
Host: localhost:3000
Accept: */*
HTTP/1.1 200 OK
X-Frame-Options: SAMEORIGIN
X-XSS-Protection: 1; mode=block
X-Content-Type-Options: nosniff
Cache-Control: no-cache
Content-Type: text/html; charset=utf-8
X-Request-Id: 95e64eb6-ee21-4e97-a33a-dbf579b3027c
X-Runtime: 0.066925
Connection: close
Server: thin
0... <delay...>
1... <delay...>
2... <delay...>
但是在shell窗口B中，打印输出会延迟并立即显示。当我在Chrome中查看该页面时，会发生同样的事情。我是否未能正确配置某些设置？
$ rake about
About your application's environment
Ruby version 2.1.4-p265 (x86_64-darwin14.0)
RubyGems version 2.2.2
Rack version 1.5
Rails version 4.1.8
JavaScript Runtime JavaScriptCore
Active Record version 4.1.8
Action Pack version 4.1.8
Action View version 4.1.8
Action Mailer version 4.1.8
Active Support version 4.1.8
Middleware Rack::Sendfile, ActionDispatch::Static, #<ActiveSupport::Cache::Strategy::LocalCache::Middleware:0x007fb0cb4ae1a0>, Rack::Runtime, Rack::MethodOverride, ActionDispatch::RequestId, Rails::Rack::Logger, ActionDispatch::ShowExceptions, ActionDispatch::DebugExceptions, ActionDispatch::RemoteIp, ActionDispatch::Reloader, ActionDispatch::Callbacks, ActiveRecord::Migration::CheckPending, ActiveRecord::ConnectionAdapters::ConnectionManagement, ActiveRecord::QueryCache, ActionDispatch::Cookies, ActionDispatch::Session::CookieStore, ActionDispatch::Flash, ActionDispatch::ParamsParser, Rack::Head, Rack::ConditionalGet, Rack::ETag
Environment development
Database adapter postgresql
Database schema version 20141213003938
现在你可能会想“你为什么不像其他人一样使用puma？”好问题。现在，我无法在我的机器上建造美洲狮宝石，原因我还没弄明白。我在大多数heroku部署的应用程序中一直使用thin，所以我很满意。如果我不能瘦下去工作，我会更加努力地建立美洲狮。