caddy/caddytest/integration/caddyfile_adapt/reverse_proxy_upstream_placeholder.txt

:8884 { map {host} {upstream} { foo.example.com 1.2.3.4 default 2.3.4.5 }

# Upstream placeholder with a port should retain the port
reverse_proxy {upstream}:80

}

:8885 { map {host} {upstream} { foo.example.com 1.2.3.4:8080 default 2.3.4.5:8080 }

# Upstream placeholder with no port should not have a port joined
reverse_proxy {upstream}

}

{ "apps": { "http": { "servers": { "srv0": { "listen": [ ":8884" ], "routes": [ { "handle": [ { "defaults": [ "2.3.4.5" ], "destinations": [ "{upstream}" ], "handler": "map", "mappings": [ { "input": "foo.example.com", "outputs": [ "1.2.3.4" ] } ], "source": "{http.request.host}" }, { "handler": "reverse_proxy", "upstreams": [ { "dial": "{upstream}:80" } ] } ] } ] }, "srv1": { "listen": [ ":8885" ], "routes": [ { "handle": [ { "defaults": [ "2.3.4.5:8080" ], "destinations": [ "{upstream}" ], "handler": "map", "mappings": [ { "input": "foo.example.com", "outputs": [ "1.2.3.4:8080" ] } ], "source": "{http.request.host}" }, { "handler": "reverse_proxy", "upstreams": [ { "dial": "{upstream}" } ] } ] } ] } } } } }