Here, we will learn How to get URL params in Gorilla Mux in go. To get params, we use mux.Vars(r *http.Request) function of gorilla mux.
Let’s register route first.
r := mux.NewRouter()
r.HandleFunc("/api/v1/users/{id}", handle_user_get).Methods("GET")
Above, You have defined GET API route with id as param. Now, pass 10 as id value in URL.
http://127.0.0.1:8000/api/v1/users/10
We will see how to get id value from the URL using gorilla mux in Go code.
func handle_user_get_oper(w http.ResponseWriter, r *http.Request) {
user_id := mux.Vars(r)["id"] // Get id value
fmt.Println("user_id: ", user_id)
}Output:
user_id: 10
How to get URL params in Gorilla Mux in Go code:
package main
import (
"fmt"
"net/http"
"github.com/gorilla/mux"
)
func handle_user_get(w http.ResponseWriter, r *http.Request) {
user_id := mux.Vars(r)["id"]
fmt.Println("user_id", user_id)
w.Write([]byte(fmt.Sprintf("User ID: %s", user_id)))
}
func main() {
r := mux.NewRouter()
// register handle func
r.HandleFunc("/api/v1/users/{id}", handle_user_get).Methods("GET")
fmt.Println("listening on : 127.0.0.1:8000")
http.ListenAndServe("127.0.0.1:8000", r)
}
You can use get API either by Postman or Curl:
curl -v http://127.0.0.1:8000/api/v1/users/20
Output:
User ID: 20
To learn more about golang, Please refer given below link:
References: