Remove % from plain-text response

[James_Grande]

1. The problem I’m having:

I’ve added this subdomain block in my Caddyfile:

ip.mydomain.com {
	templates
	header Content-Type text/plain
	respond "{{.RemoteIP}}"
	encode zstd gzip
}

Whe I perform a curl to it from a terminal (macOS), I get the IP address, as expected, but a % symbol at the end as well.

What’s causing this and how can I remove it, please?

curl https://ip.mydomain.com
45.155.43.53%

Also, is it possible to receive the same response regardlress of whether I’m using https or http?

Thanks!

2. Error messages and/or full log output:

N/A

3. Caddy version:

v2.10.0 h1:fonubSaQKF1YANl8TXqGcn4IbIRUDdfAkpcsfI/vX5U=

4. How I installed and ran Caddy:

a. System environment:

Docker

[Mohammed90 (Mohammed Al Sahaf)]

@James_Grande

but a % symbol at the end as well.

That’s from the shell, not Caddy. The shell is telling you the response comes without \n.

@James_Grande

Also, is it possible to receive the same response regardlress of whether I’m using https or http?

Yes

[James_Grande]

@Mohammed90

That’s from the shell, not Caddy. The shell is telling you the response comes without \n.

I thought as much, but here’s what I get if I add \n at the end – respond "{{.RemoteIP}}\n":

curl https://ip.mydomain.com
10.0.0.1\n%

@Mohammed90

Yes

Would you mind telling how to get a response for http, as well as https. please?

[hmoffatt (Hamish Moffatt)]

@James_Grande

Would you mind telling how to get a response for http, as well as https. please?

Check what you are getting with curl -v - although it appears blank without -v you are probably getting a redirect to https.

[qrhfz]

caddy doesnt unescape string “\n” to new line apparently. but this works

:80 {
	templates
	header Content-Type text/plain
	respond "{{.RemoteIP}}
"
}

[James_Grande]

@qrhfz

caddy doesnt unescape string “\n” to new line apparently. but this works

Thank you! I did that and now I’m getting just the IP address. The important thing was to put the closing quote at the beginning of the line, with no indentation.

@hmoffatt

Check what you are getting with curl -v - although it appears blank without -v you are probably getting a redirect to https.

You’re right, there’s a redirect:

* Request completely sent off
< HTTP/1.1 301 Moved Permanently
< Server: nginx
< Date: Tue, 23 Sep 2025 06:25:51 GMT
< Content-Type: text/html
< Content-Length: 162
< Connection: keep-alive
< Location: https://ip.mydomain.com/

What do I have to do in order to get the IP, instead of the redirect?

Also, {{.RemoteIP}}, when queried from within the local network, returns the gateway’s IP – 10.0.0.1. How can I get the external address of the requesting machine?

[hmoffatt (Hamish Moffatt)]

@James_Grande

What do I have to do in order to get the IP, instead of the redirect?

You can disable the automatic redirect: Global options (Caddyfile) — Caddy Documentation

@James_Grande

Also, {{.RemoteIP}}, when queried from within the local network, returns the gateway’s IP – 10.0.0.1. How can I get the external address of the requesting machine?

That would be your gateway doing NAT I think, unless it is also a reverse proxy. In that case, you can’t.