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main.go
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main.go
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package main
import (
"fmt"
"net/http"
"github.com/gorilla/mux"
"github.com/urfave/negroni"
)
func handleMain(w http.ResponseWriter, r *http.Request) {
_, err := w.Write([]byte("{\"value\":42}\n"))
if err != nil {
fmt.Println("error handleMain", err)
}
}
func middleware1() negroni.Handler {
fmt.Println("carregando middleware 1")
return negroni.HandlerFunc(func(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
fmt.Println("empilhando middleware 1")
next(w, r)
fmt.Println("desempilhando middleware 1")
})
}
func middleware2() negroni.Handler {
fmt.Println("carregando middleware 2")
return negroni.HandlerFunc(func(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
fmt.Println("empilhando middleware 2")
next(w, r)
fmt.Println("desempilhando middleware 2")
})
}
func middleware3() negroni.Handler {
fmt.Println("carregando middleware 3")
return negroni.HandlerFunc(func(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
fmt.Println("empilhando middleware 3")
next(w, r)
fmt.Println("desempilhando middleware 3")
})
}
func main() {
n := negroni.Classic()
n.Use(middleware1())
n.Use(middleware2())
n.Use(middleware3())
fmt.Println("-=-=-=-=-=-=-=-=-=-=-=-=-=-")
r := mux.NewRouter().StrictSlash(true)
n.UseHandler(r)
r.HandleFunc("/", handleMain).Methods("GET")
fmt.Println("main listen at :8080")
err := http.ListenAndServe(":8080", n)
if err != nil {
fmt.Println(err)
}
}