Unable to append to servers via API without overwiting

Help
1

1. The problem I’m having:

Unable to append to servers through API POST. A POST to /config/apps/http/servers/… simply overwrites any previous servers

2. Error messages and/or full log output:

3. Caddy version:

2.7.5

4. How I installed and ran Caddy:

a. System environment:

Ubuntu 22.04.3 LTS , installed through apt

b. Command:

Sending a POST to /config/apps/http/servers/… with the following body

{
    "bye": {
        "listen": [
            ":2016"
        ],
        "routes": [
            {
                "handle": [
                    {
                        "handler": "static_response",
                        "body": "Goodbye, world!"
                    }
                ]
            }
        ]
    }
}

c. Service/unit/compose file:

d. My complete Caddy config:

{   
    "apps": {
        "http": {
            "http_port": 8080,
            "https_port": 4343,
            "servers": {
                 "hello": {
                    "listen": [
                        ":2015"
                    ],
                    "routes": [
                    {
                        "handle": [
                        {
                            "handler": "static_response",
                            "body": "Hello, world!"
                        }
                        ]
                    }
                    ]
                }
            }
        }
    }
}

5. Links to relevant resources:

Having the same problem as the person here : Unable to append http/servers config through API

If I try to make the servers block an array I see this error as a response when trying to append to servers :

Error: loading initial config: loading new config: loading http app module: decoding module config: http: json: cannot unmarshal array into Go struct field App.servers of type map[string]*caddyhttp.Server
2

/apps/http/servers/ is a map (object), not an array:

hence POST replaces the value.

3

Right. So my objective is to have a dynamically populated list of servers updated via the API.

What approach would you suggest to accomplish this without rewriting the entire list of servers every time a change to 1 server’s options needs to happen?

4

I did it like this:

$ curl -H "Content-Type: application/json" \
    -d '{ <...> }' \
     "http://localhost:2019/config/apps/http/servers/<name>"

Replace <...> with the server config and <name> with the name you want to give the server (the name isn’t important, it’s for your own reference and convenience).