Golang : Build new URL for named or registered route with Gorilla webtoolkit example
Problem :
Ok, you want to construct a new URL with Gorilla webtoolkit but don't know how. For example, you have a named / registered route HandleFunc()
defined and you want to build a URL based on the named route.
Solution :
Use the Get()
method to retrieve the route base on the route name. Supply the URL()
method with parameters. 1 key to 1 value.
package main
import (
"fmt"
"github.com/gorilla/mux"
"net/http"
)
func SayHelloWorld(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("Hello, World!"))
}
func ProcessPathVariables(w http.ResponseWriter, r *http.Request) {
// break down the variables for easier assignment
vars := mux.Vars(r)
name := vars["name"]
job := vars["job"]
age := vars["age"]
w.Write([]byte(fmt.Sprintf("Name is %s \n", name)))
w.Write([]byte(fmt.Sprintf("Job is %s \n", job)))
w.Write([]byte(fmt.Sprintf("Age is %s \n", age)))
route := mux.CurrentRoute(r)
w.Write([]byte(fmt.Sprintf("Route name is %v \n", route.GetName())))
}
func main() {
mx := mux.NewRouter()
mx.HandleFunc("/", SayHelloWorld).Name("home")
// this route name is person
mx.HandleFunc("/person/{name}/{job}/{age:[0-99]+}", ProcessPathVariables).Name("person")
// get the person route and build a new URL with 1 key to 1 value parameters.
url, err := mx.Get("person").
URL("name", "Boo",
"job", "CEO",
"age", "37")
if err != nil {
fmt.Println(err)
}
builtURL := url.String()
fmt.Printf("URL : %v \n", builtURL)
http.ListenAndServe(":8080", mx)
}
Output :
URL : /person/Boo/CEO/37
References :
By Adam Ng
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