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reverseproxy: Fix upstreams with placeholders with no port (#4046)

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Francis Lavoie 2021-03-03 12:12:31 -05:00 committed by GitHub
parent ad8d01cb66
commit 51f35ba03f
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102
caddytest/integration/caddyfile_adapt/reverse_proxy_upstream_placeholder.txt Normal file
View file

@ -0,0 +1,102 @@
: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}"
}
]
}
]
}
]
}
}
}
}
}

7
modules/caddyhttp/reverseproxy/caddyfile.go
View file

@ -184,6 +184,13 @@ func (h *Handler) UnmarshalCaddyfile(d *caddyfile.Dispenser) error {
if network != "" {
return caddy.JoinNetworkAddress(network, host, port), nil
}
// if the host is a placeholder, then we don't want to join with an empty port,
// because that would just append an extra ':' at the end of the address.
if port == "" && strings.Contains(host, "{") {
return host, nil
}
return net.JoinHostPort(host, port), nil
}