ruby爬虫高并发方案

em-synchrony

em-http-request

typhoeus

eventmachine

em-http-request example

Simple client example

  EventMachine.run {
    http = EventMachine::HttpRequest.new('http://127.0.0.1/').get :query => {'keyname' => 'value'}, :timeout => 10

    http.callback {
      p http.response_header.status
      p http.response_header
      p http.response

      EventMachine.stop
    }
  }

Multi-request example

Fire and wait for multiple requests to complete via the MultiRequest interface.

  EventMachine.run {
    multi = EventMachine::MultiRequest.new

    # add multiple requests to the multi-handler
    multi.add(EventMachine::HttpRequest.new('http://www.google.com/').get)
    multi.add(EventMachine::HttpRequest.new('http://www.yahoo.com/').get)

    multi.callback  {
      p multi.responses[:succeeded]
      p multi.responses[:failed]

      EventMachine.stop
    }
  }

Basic-Auth example

Full basic author support. For OAuth, check examples/oauth-tweet.rb file.

  EventMachine.run {
    http = EventMachine::HttpRequest.new('http://www.website.com/').get :head => {'authorization' => ['user', 'pass']}

    http.errback { failed }
    http.callback {
      p http.response_header
      EventMachine.stop
    }
  }

POSTing data example

  EventMachine.run {
    http1 = EventMachine::HttpRequest.new('http://www.website.com/').post :body => {"key1" => 1, "key2" => [2,3]}
    http2 = EventMachine::HttpRequest.new('http://www.website.com/').post :body => "some data"

    # ...
  }

Streaming body processing

Allows you to consume an HTTP stream of content in real-time. Each time a new piece of content is pushed to the client, it is passed to the stream callback for you to operate on.

  EventMachine.run {
    http = EventMachine::HttpRequest.new('http://www.website.com/').get
    http.stream { |chunk| print chunk }
  }

Streaming files from disk

Allows you to efficiently stream a (large) file from disk via EventMachine's FileStream interface.

  EventMachine.run {
    http = EventMachine::HttpRequest.new('http://www.website.com/').post :file => 'largefile.txt'
    http.callback { |chunk| puts "Upload finished!" }
  }

Proxy example

Full transparent proxy support with support for SSL tunneling.

  EventMachine.run {
    http = EventMachine::HttpRequest.new('http://www.website.com/').get :proxy => {
      :host => 'www.myproxy.com',
      :port => 8080,
      :authorization => ['username', 'password'] # authorization is optional
  }

SOCKS5 Proxy example

Tunnel your requests via connect via SOCKS5 proxies (ssh -D port somehost).

EventMachine.run {
  http = EventMachine::HttpRequest.new('http://www.website.com/').get :proxy => {
    :host => 'www.myproxy.com',
    :port => 8080,
    :type => :socks
}

Auto-follow 3xx redirects

Specify the max depth of redirects to follow, default is 0.

  EventMachine.run {
    http = EventMachine::HttpRequest.new('http://www.google.com/').get :redirects => 1
    http.callback { p http.last_effective_url }
  }

WebSocket example

Bi-directional communication with WebSockets: simply pass in a ws:// resource and the client will negotiate the connection upgrade for you. On successful handshake the callback is invoked, and any incoming messages will be passed to the stream callback. The client can also send data to the server at will by calling the "send" method!

  EventMachine.run {
    http = EventMachine::HttpRequest.new("ws://yourservice.com/websocket").get :timeout => 0

    http.errback { puts "oops" }
    http.callback {
      puts "WebSocket connected!"
      http.send("Hello client")
    }

    http.stream { |msg|
      puts "Recieved: #{msg}"
      http.send "Pong: #{msg}"
    }

    http.disconnect { puts "oops, dropped connection?" }
  }