netflux-homepage/handler/handler.go

package handler

import (
	_ "embed"
	"net/http"
)

//go:embed static/index.html
var indexPage string

func New(matrixHostname, matrixBaseURL string) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		if r.Method != http.MethodGet && r.Method != http.MethodHead {
			w.WriteHeader(http.StatusMethodNotAllowed)
			w.Write([]byte("405 method not allowed\n"))
			return
		}

		switch r.URL.Path {
		case "/.well-known/matrix/server":
			w.Header().Add("content-type", "application/json")
			w.WriteHeader(http.StatusOK)
			w.Write([]byte(`{"m.server": "` + matrixHostname + `"}`))
		case "/.well-known/matrix/client":
			w.Header().Add("content-type", "application/json")
			w.WriteHeader(http.StatusOK)
			w.Write([]byte(`{"m.homeserver": {"base_url": "` + matrixBaseURL + `"}}`))
		case "/":
			w.Header().Add("content-type", "text/html")
			w.WriteHeader(http.StatusOK)
			if r.Method == http.MethodGet {
				w.Write([]byte(indexPage))
			}
		default:
			http.NotFound(w, r)
		}
	}
}