Ruby Sinatra Webservice running on localhost:4567 but not on IP

Question

I have a ruby(using sinatra) webservice on windows 7 32 bit OS. Its running on port 4567. Its working fine when I use localhost:4567 but when I replace localhost with the local ip of my machine say, 192.168.103.99:4567 it doesn't work, and fails to connect. I have already disabled the firewall, by-pass proxy and added port 4567 to exception, still no luck.

What might be the issue ?

Check localhost is bound to IPV4 localhost 127.0.0.1 and not an IPV6 localhost. Also, what web server are you using? Mongrel, Thin, Webrick, Passenger? — mcfinnigan, May 30 '13 at 09:29
ping localhost and see what ip address is resolved. To bind webrick to a specific ip, see this documentation: http://smyck.net/2007/03/11/how-to-bind-webrick-to-any-ip-address/ — mcfinnigan, May 30 '13 at 09:33
on pinging localhost its returning reply from something like ::1: which I think is ipv4 ? — foobar, May 30 '13 at 09:40
let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/30894/discussion-between-mcfinnigan-and-smilepleeeaz) — mcfinnigan, May 30 '13 at 09:58
Here's a [link](http://stackoverflow.com/questions/16118971/cannot-access-sinatra-app-through-the-local-network) that helped me once. — ss_everywhere, May 30 '13 at 10:28

foobar · Accepted Answer · 2021-02-24T22:52:28.783

59

Following worked for me.

ruby app.rb -o 0.0.0.0

edited Feb 24 '21 at 22:52

answered Jan 02 '14 at 09:37

foobar

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score 26 · Answer 2 · answered Apr 12 '14 at 10:25

When using the built-in server through the run! if app_file == $0 check, Sinatra's doc explains that set :bind, '0.0.0.0' is required to make the interface available outside the localhost layer.

It is not required to use a custom IP address or a reverse DNS (mydomain.com…): '0.0.0.0' is the legit value expected by Sinatra, which will be interpreted correctly.

Therefore, a minimal, self-contained Sinatra application made available on all interfaces, not only localhost, would be:

require 'sinatra/base'

class MyApp < Sinatra::Base
  set :bind, '0.0.0.0'

  get '/' do
    'Hello World'
  end

  run! if app_file == $0
end

score 11 · Answer 3 · answered May 30 '13 at 11:24

11

To set server hostname or IP-address use sinatra setting bind like

set :bind, '192.168.103.99'

answered May 30 '13 at 11:24

unused

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score 1 · Answer 4 · edited Apr 11 '14 at 23:14

1

this

require 'rubygems'
require 'sinatra'
require "dbi"

set :bind, '192.168.200.185'
get '/' do
    'hello word'
end

edited Apr 11 '14 at 23:14

A.J. Uppal

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answered Apr 11 '14 at 22:51

Erick Guardado

59
2

This works, but needs a bit of explanation for the answer. – FilBot3 Sep 02 '15 at 01:14

Ruby Sinatra Webservice running on localhost:4567 but not on IP

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