till commented on issue #4656:
URL: https://github.com/apache/couchdb/issues/4656#issuecomment-2746152088
Here are examples in Elixir (I am sadly not profficient in Erlang) and Go
which both work. They bind on `0.0.0.0:31337` and the `curl` command works with
either.
```elixir
Mix.install([:plug_cowboy])
defmodule EchoServer do
use Plug.Router
plug :match
plug :dispatch
get "/" do
headers = conn.req_headers |> Enum.map_join("\n", fn {k, v} -> "#{k}:
#{v}" end)
send_resp(conn, 200, headers)
end
match _ do
send_resp(conn, 404, "Not Found")
end
end
{:ok, _} = Plug.Cowboy.http(EchoServer, [], ip: {0, 0, 0, 0}, port: 31337)
IO.puts("Echo server running on http://0.0.0.0:31337";)
Process.sleep(:infinity)
```
Here is my example in Go:
```go
package main
import (
"encoding/json"
"fmt"
"net/http"
"os"
)
func main() {
http.HandleFunc("/", respond)
if err := http.ListenAndServe("0.0.0.0:31337", nil); err != nil {
fmt.Println("err:", err)
os.Exit(1)
}
os.Exit(0)
}
func respond(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
json.NewEncoder(w).Encode(map[string]any{
"header": r.Header,
})
}
```
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