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package main
import (
"net/http"
"time"
jwt "github.com/dgrijalva/jwt-go"
"github.com/labstack/echo"
"github.com/labstack/echo/middleware"
)
func login(c echo.Context) error {
username := c.FormValue("username")
password := c.FormValue("password")
if username == "jon" && password == "shhh!" {
// Create token
token := jwt.New(jwt.SigningMethodHS256)
// Set claims
claims := token.Claims.(jwt.MapClaims)
claims["name"] = "Jon Snow"
claims["admin"] = true
claims["exp"] = time.Now().Add(time.Hour * 72).Unix()
// Generate encoded token and send it as response.
t, err := token.SignedString([]byte("secret"))
if err != nil {
return err
}
return c.JSON(http.StatusOK, map[string]string{
"token": t,
})
}
return echo.ErrUnauthorized
}
func accessible(c echo.Context) error {
return c.String(http.StatusOK, "Accessible")
}
func restricted(c echo.Context) error {
user := c.Get("user").(*jwt.Token)
claims := user.Claims.(jwt.MapClaims)
name := claims["name"].(string)
return c.String(http.StatusOK, "Welcome "+name+"!")
}
func main() {
e := echo.New()
// Middleware
e.Use(middleware.Logger())
e.Use(middleware.Recover())
// Login route
e.POST("/login", login)
// Unauthenticated route
e.GET("/", accessible)
// Restricted group
r := e.Group("/restricted")
r.Use(middleware.JWT([]byte("secret")))
r.GET("", restricted)
e.Logger.Fatal(e.Start(":1323"))
}
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