Take a moment and think about the last change,.... will it scale
for multiple handlers? If you think about it the method is part
of the request and what we want is this handler never to be
invoked unless the method is GET, that sound like a routing
rule. However the muxer in package net/http does not support
this out of the box. We have two options
- Implement a midleware that checks it for us and use that
- Or use another package with this capability
Hard choice right ;-). Let's use the github.com/gorilla/mux package.
"net/http"
"os"
+
+ "github.com/gorilla/mux"
)
func main() {
@@ -18,19 +20,15 @@ func main() {
}
}
-func NewRouter() (router *http.ServeMux) {
- router = http.NewServeMux()
- router.Handle("/books", &books{})
+func NewRouter() (router *mux.Router) {
+ router = mux.NewRouter()
+ router.Handle("/books", &books{}).Methods("GET")
return
}
type books struct{}
func (h *books) ServeHTTP(w http.ResponseWriter, r *http.Request) {
- if r.Method != "GET" {
- w.WriteHeader(http.StatusMethodNotAllowed)
- return
- }
w.Header().Set("Content-Type", "application/json")
model := struct {
Message string `json:"message"`
