http request (using net http or RestClient) inside my rails controller

Question

I have problem creating http request inside my controller action. I used net/http and RestClient but I can't get it to work on my local server url i.e http://localhost:3000/engine/do_process, I always get requesttimeout however It works with other valid url.

Hope you can enlighten me on this one. I did some research but I can't find resources as to why I got this timeout problem.

Sample controller code:

require 'rest_client'

class LgController < ApplicationController
  def get_lgjson

     response =  RestClient.get("http://localhost:3000/engine/do_process_lg")
     @generated_json = response.to_str

  end
end

Show us the code to create the request please. My money is on that you're making another HTTP request to another part of your application and because WEBrick being a single-threaded server it's not able to serve it at the same time as the initial request. — Ryan Bigg, Oct 07 '11 at 03:11
require 'rest_client' class LgController < ApplicationController ef get_lgjson response = RestClient.get("http://localhost:3000/engine/do_process_lg") @generated_json = response.to_str end end — jemtech008, Oct 07 '11 at 03:14
What Ryan Bigg said: "it's not able to serve it at the same time as the initial request". That means RestClient#get cannot be responded to until your get_lgjson controller action finishes (i.e. never).... You want a multi threaded server, or maybe run two instances on different ports. — adzdavies, Oct 07 '11 at 03:50
@adzdavies thanks for the reply. I think i need a multi threaded server. Its my first time coding RoRs, i don't know which way to go. — jemtech008, Oct 07 '11 at 04:11

score 1 · Answer 1 · answered Jul 18 '16 at 16:20

I encountered this problem today, too, exactly in the same context: using the Ruby RestClient to make a HTTP request inside a controller. It worked earlier in a different project using OpenURI without problems. This was surprising because both http libraries, the RestClient and OpenURI for Ruby, use the same library Net::HTTP.

It is the URL that makes the difference. We can make a connection to an external URL in the controller, but not to localhost. The problem seems to be the duplicated connection to localhost. There is already a connection to localhost open, and we are trying to open a second one. This does not seem to work in a single-threaded web server like Thin for instance. A multi-threaded web server such as Puma could help.

score 0 · Answer 2 · answered Jun 19 '13 at 08:17

0

I think this is because you use single-threaded web server. You have two opportunities to fix.

use passenger
define if it makes sense to make net/http to localhost.

answered Jun 19 '13 at 08:17

Mike

1

http request (using net http or RestClient) inside my rails controller

2 Answers2