I'm trying to figure out the best way to handle requests to / and only / in Go and handle different methods in different ways. Here's the best I've come up with:
package main
import (
"fmt"
"html"
"log"
"net/http"
)
func main() {
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
if r.URL.Path != "/" {
http.NotFound(w, r)
return
}
if r.Method == "GET" {
fmt.Fprintf(w, "GET, %q", html.EscapeString(r.URL.Path))
} else if r.Method == "POST" {
fmt.Fprintf(w, "POST, %q", html.EscapeString(r.URL.Path))
} else {
http.Error(w, "Invalid request method.", 405)
}
})
log.Fatal(http.ListenAndServe(":8080", nil))
}
Is this idiomatic Go? Is this the best I can do with the standard http lib? I'd much rather do something like http.HandleGet("/", handler) as in express or Sinatra. Is there a good framework for writing simple REST services? web.go looks attractive but appears stagnant.
Thank you for your advice.
From Go 1.22.0 on you can put the HTTP method before the endpoint
package main
import (
"net/http"
)
func main() {
router := http.NewServeMux()
router.HandleFunc("GET /", myHandler)
router.HandleFunc("GET /other", myOtherHandler)
router.HandleFunc("POST /data", myPostHandler)
http.ListenAndServe(":8080", router)
}