Setting an HTTP Timeout in Ruby 1.9.3

问题

I'm using Ruby 1.9.3 and need to GET a URL. I have this working with Net::HTTP, however, if the site is down, Net::HTTP ends up hanging.

While searching the internet, I've seen many people faced similar problems, all with hacky solutions. However, many of those posts are quite old.

Requirements:

• I'd prefer using Net::HTTP to installing a new gem.
• I need both the Body and the Response Code. (e.g. 200)
• I do not want to require open-uri, since that makes global changes and raises some security issues.
• I need to GET a URL within X seconds, or return error.

Using Ruby 1.9.3, how can I GET a URL while setting a timeout?

---

To clarify, my existing code looks like:

Net::HTTP.get_response(URI.parse(url))

Trying to add:

Net::HTTP.open_timeout(1000)

Results in:

NoMethodError: undefined method `open_timeout' for Net::HTTP:Class

回答1:

You can set the open_timeout attribute of the Net::HTTP object before making the connection.

uri = URI.parse(url)
Net::HTTP.new(uri.hostname, uri.port) do |http|
  http.open_timeout = 1000
  response = http.request_get(uri.request_uri)
end

回答2:

I tried all the solutions here and on the other questions about this problem but I only got everything right with the following code, The open-uri gem is a wrapper for net::http. I needed a get that had to wait longer than the default timeout and read the response. The code is also simpler.

require 'open-uri'
open(url, :read_timeout => 5 * 60) do |response|
  if response.read[/Return: Ok/i]
    log "sending ok"
  else
    raise "error sending, no confirmation received"
  end
end

来源：https://stackoverflow.com/questions/24387405/setting-an-http-timeout-in-ruby-1-9-3