Using captured groups from path_regexp

[remino (Rem)]

1. The problem I’m having:

I’m trying to match paths by regexp and respond with data from its captured groups.

While other placeholders work, those for captured groups just output {http.regexp…}.

2. Error messages and/or full log output:

HTTP/1.1 200 OK
Content-Type: text/plain; charset=utf-8
Server: Caddy
X-Numbers-Header: You requested the number {http.regexp.numbers.1} from darwin
Date: Mon, 22 Apr 2024 23:20:27 GMT
Content-Length: 60

You requested the number {http.regexp.numbers.1} from darwin

3. Caddy version:

v2.7.6

4. How I installed and ran Caddy:

a. System environment:

Via Homebrew on macOS Sonoma.

b. Command:

caddy run

c. Service/unit/compose file:

N/A

d. My complete Caddy config:

:6789

@numbers path_regexp /numbers/(\d+)

route @numbers {
	header {
		X-Numbers-Header "You requested the number {re.numbers.1} from {system.os}"
	}

	respond "You requested the number {re.numbers.1} from {system.os}"
}

5. Links to relevant resources:

[remino (Rem)]

:6789

@numbers path_regexp numbers /numbers/(\d+)

route @numbers {
	header {
		X-Numbers-Header "You requested the number {re.numbers.1} from {system.os}"
	}

	respond "You requested the number {re.numbers.1} from {system.os}"
}

Figured it out. See above. I had to add a numbers in @numbers to name my regexp (as the latter is the name for just the matcher, I think).

I guess I missed the part in the docs saying that. I wish there was a working example of this in there.

[francislavoie]

Actually, in v2.8.0 it will work without specifying the name for the path_regexp matcher, it will inherit the name from the named matcher. I’m working on the docs for that right now.