问题描述
我正在构建一个同时运行EM :: WebSocket服务器和Sinatra服务器的Ruby应用.我个人认为这两个都可以处理SIGINT.但是,当在同一个应用程序中同时运行两个应用程序时,当我按Ctrl + C组合键时,该应用程序将继续运行.我的假设是其中一个正在捕获SIGINT,而另一个也无法捕获它.不过,我不确定该如何解决.
I'm building a Ruby app that runs both an EM::WebSocket server as well as a Sinatra server. Individually, I believe both of these are equipped to handle a SIGINT. However, when running both in the same app, the app continues when I press Ctrl+C. My assumption is that one of them is capturing the SIGINT, preventing the other from capturing it as well. I'm not sure how to go about fixing it, though.
下面是代码:
require 'thin'
require 'sinatra/base'
require 'em-websocket'
EventMachine.run do
class Web::Server < Sinatra::Base
get('/') { erb :index }
run!(port: 3000)
end
EM::WebSocket.start(port: 3001) do |ws|
# connect/disconnect handlers
end
end
推荐答案
我遇到了同样的问题.对我而言,关键似乎是从signals: false
:
I had the same issue. The key for me seemed to be to start Thin in the reactor loop with signals: false
:
Thin::Server.start(
App, '0.0.0.0', 3000,
signals: false
)
这是一个简单的聊天服务器的完整代码:
This is complete code for a simple chat server:
require 'thin'
require 'sinatra/base'
require 'em-websocket'
class App < Sinatra::Base
# threaded - False: Will take requests on the reactor thread
# True: Will queue request for background thread
configure do
set :threaded, false
end
get '/' do
erb :index
end
end
EventMachine.run do
# hit Control + C to stop
Signal.trap("INT") {
puts "Shutting down"
EventMachine.stop
}
Signal.trap("TERM") {
puts "Shutting down"
EventMachine.stop
}
@clients = []
EM::WebSocket.start(:host => '0.0.0.0', :port => '3001') do |ws|
ws.onopen do |handshake|
@clients << ws
ws.send "Connected to #{handshake.path}."
end
ws.onclose do
ws.send "Closed."
@clients.delete ws
end
ws.onmessage do |msg|
puts "Received message: #{msg}"
@clients.each do |socket|
socket.send msg
end
end
end
Thin::Server.start(
App, '0.0.0.0', 3000,
signals: false
)
end
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