From: Francis Cianfrocca <garbagecat10@...>
Date: 2006-10-27T05:12:24+09:00
Subject: Re: threads

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On 10/24/06, Brad Tilley <rtilley@vt.edu> wrote:
>
> I'm rewriting some old Python scripts in Ruby. Just to learn a bit more.
> I want to thread this code to check websites concurrently. Could somone
> offer advice? What are reasonable limits on threads in Ruby?



Here's an EventMachine code sample that should do what you need. Notice,
this code is nonthreaded, but it still does all the HTTP GETs
simultaneously. Of course you'll want to do something more interesting in
the http.callback block.

#-------------------------------------

require 'rubygems'
require 'eventmachine'

$addrs = [
  "www.apple.com",
  "www.cisco.com",
  "www.microsoft.com"
]

def scan_addr addr
  http = EventMachine::Protocols::HttpClient.request(
    :host => addr,
    :port => 80,
    :request => "/"
  )

  http.callback {|response|
    puts response[:status]
    puts response[:headers]
    puts response[:content].length
  }
end

EventMachine.run {
  $addrs.each {|addr| scan_addr addr}
}

#-------------------------------------------------

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