Add support for IPv6

[postmanlabs]

Add support for IPv6

[toreanderson]

Was this issue closed by mistake, or was it fixed when closed but later regressed?

At the time of writing, it does not seem to work:

$ host -t AAAA httpbin.org
httpbin.org has no AAAA record
$ curl https://httpbin.org/ip
{
  "origin": "84.214.x.y"
}

These tests were done from a dual-stacked machine, so curl would have preferred to use IPv6 if it could have, as demonstrated by using a different print my ip-service that is IPv6 capable:

$ curl http://icanhazip.com
2a02:fe0:x:y:825e:b586:2ada:4d2e
$ curl -4 http://icanhazip.com
84.214.x.y

[sigmavirus24]

I don't know why @kennethreitz closed this but I'll reiterate that this isn't a bug in the application code. We and icanhazip work the same way, we both use remote_addr from the request object in Flask. The difference is that httpbin is deployed on Heroku so we also return X-Forwarded-For. Heroku does not have IPv6 support thus this is purely a deployment issue.

[gruns]

+1

Please add IPv6 support.

[ikomwrestling]

Few years have passed and httpbin still have no IPv6 support.

@kennethreitz Please add support for IPv6.

[ad-m]

Heroku does not support IPv6 ( https://help.heroku.com/I8L6RW01/does-heroku-support-ipv6 ). Therefore, the change requires a complete change in the way the application is deployed.

[ssbarnea]

Any chance to make this happen? lacking support for ipv6 is critical for http verification. Broken ipv6 is a very common error.

[wanisfahmyDE]

I just used https://mockbin.org/ which has support for IPv6