How can I block this code with Net::HTTP in ruby?

Question

Here is a URL

http://192.168.1.2:1218/?name=verify_code_string_queue&opt=get&auth=verify_code_string_queue

It will return a string or a status code like SQS_GET_END

Now I need to break the loop when the url return a string,or keep blocking.

Here is my code

require 'net/http'
require 'open-uri'
loop do
  codeText = open("http://192.168.1.2:1218/?name=verify_code_string_queue&opt=get&auth=verify_code_string_queue") do |repo|
    repo.read
  end
  if codeText != "SQS_GET_END"
    break
  end
end

But it doesn't work,output cannot assign requested address - connect(2) (Errno::EADDRNOTAVAIL). Please tell me how to solve it,thanks

If its not the host you are working on, is 192.168.1.2 reachable from your host? — Anand Shah, Dec 28 '12 at 08:24
What is your question, exactly? Do you want to know why you get the EADDRNOTAVAIL error, or do you want to 'catch' the error and continue the loop? — rdvdijk, Dec 28 '12 at 09:03
rdvdijk,I want to know the reason why I get EADDRNOTAVAIL error. — ZhuRong, Dec 28 '12 at 09:45
Check this question and its answers: http://stackoverflow.com/questions/3886506/why-would-connect-give-eaddrnotavail — rdvdijk, Dec 28 '12 at 09:57
yeah,I checked the url you gave me,but it looks useless for me,thanks a lot anyway. — ZhuRong, Dec 28 '12 at 10:25

score 0 · Answer 1 · answered Dec 28 '12 at 10:44

The problem is that you are doing too many requests in a short time. This will result in the Errno::EADDRNOTAVAIL error. You can add a sleep within the loop, to limit the number of requests you make.

Something like this:

require 'net/http'
require 'open-uri'
loop do
  codeText = open("http://192.168.1.2:1218/?name=verify_code_string_queue&opt=get&auth=verify_code_string_queue") do |repo|
    repo.read
  end
  if codeText != "SQS_GET_END"
    break
  end
  sleep 1 # <= sleep for one second
end

How can I block this code with Net::HTTP in ruby?

1 Answers1