asynchronous http request in ruby

 require 'net/http'

urls = [
  {'link' => 'http://www.google.com/'},
  {'link' => 'http://www.facebook.com/'},
 {'link' => 'http://www.yahoo.com/'}
]

urls.each do |u|
  u['content'] = Net::HTTP.get( URI.parse(u['link']) )
end

print urls

This will work as procedural code.. I just want to hit a server, no issues about the order. How can i do that in ruby. One option is using threads.

Here's an example using threads.

require 开发者_StackOverflow中文版'net/http'

urls = [
  {'link' => 'http://www.google.com/'},
  {'link' => 'http://www.facebook.com/'},
  {'link' => 'http://www.yahoo.com/'}
]

urls.each do |u|
  Thread.new do
    u['content'] = Net::HTTP.get( URI.parse(u['link']) )
    puts "Successfully requested #{u['link']}"

    if urls.all? {|u| u.has_key?("content") }
      puts "Fetched all urls!"
      exit
    end
  end
end

Any better solution..??

PS:- i want to hit mixpanel, so that's why I just want to make a http call and dont wait for the response.

Lightweight Async handling is the job of Threads (as you said) or Fibers.

Otherwise, you should consider EventMachine which is a very powerful tool.

EDIT: The above URL for Event Machine is dead. Here is their GitHub account, https://github.com/eventmachine/eventmachine . It serves as a good starting point.

Here is a great article covering the topic.

Generally, viable alternatives to using threads for this would be the use of a Fiber or you could use em-http-request. In the latter example you could leave out the callback handling for your particular purpose.

If its just about plain http requests in async style, probably Unirest is the best fit to achieve it.

Asnc request is as simple as:

response = Unirest.post "http://httpbin.org/post", 
                    headers:{ "Accept" => "application/json" }, 
                    parameters:{ :age => 23, :foo => "bar" } {|response|
response.code # Status code
response.headers # Response headers
response.body # Parsed body
response.raw_body # Unparsed body
}