bug: `/ip` returns origin IP with port, but should exclude the port

[gowy222]

Hi ,

I noticed an issue with the /ip endpoint. According to the description, it should return the origin IP. However, the current response includes the port number as well. For example:

{
  "origin": "23.XX.XXX.9:47782"
}

Expected behavior:
The IP address should not include the port. It should return just the IP, like:

{
  "origin": "23.XX.XXX.9"
}

Including the port may lead to inconsistencies or issues for systems expecting a pure IP address.

Steps to Reproduce:

Make a request to /ip

Observe that the returned origin field includes the port number

Thanks!

[mccutchen]

Interesting, thanks for the report!

I can’t quickly reproduce on my phone via https://httpbingo.org.

Can you provide example curl -v output showing what you’re seeing?

---

Ah, I was able to reproduce w/ go-httpbin running locally (via make run, in this case):

$ curl -v http://127.0.0.1:8080/ip
*   Trying 127.0.0.1:8080...
* Connected to 127.0.0.1 (127.0.0.1) port 8080
> GET /ip HTTP/1.1
> Host: 127.0.0.1:8080
> User-Agent: curl/8.7.1
> Accept: */*
>
* Request completely sent off
< HTTP/1.1 200 OK
< Access-Control-Allow-Credentials: true
< Access-Control-Allow-Origin: *
< Content-Type: application/json; charset=utf-8
< Date: Tue, 10 Jun 2025 11:42:22 GMT
< Content-Length: 34
<
{
  "origin": "127.0.0.1:64644"
}

[mccutchen]

Thanks again for the report, @gowy222! This was fixed in #212 (and actually tested in #213).

Just released the fix in v2.18.2.