package main

import (
	"io"
	"log"
	"net/http"
	"os"
)

func main() {
	p := os.Getenv("PORT")
	if err := http.ListenAndServe(":"+p, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		b, _ := io.ReadAll(r.Body)
		log.Printf("> %s (%+v) %s", r.URL, r.Header, b)
		body := os.Getenv("BODY")
		if body == "-" {
			body = string(b)
		}
		w.Write([]byte(body))
	})); err != nil {
		panic(err)
	}
}