gin gonic with jwt from auth0 (and CORS enabled)

main.go

package main

import (
	"github.com/auth0/go-jwt-middleware"
	"github.com/dgrijalva/jwt-go"
	"gopkg.in/gin-gonic/gin.v1"
)

func main() {
	startServer()
}

var jwtMiddleware = jwtmiddleware.New(jwtmiddleware.Options{
	ValidationKeyGetter: func(token *jwt.Token) (interface{}, error) {
		return []byte("your auth0 client secret here"), nil
	},
	SigningMethod: jwt.SigningMethodHS256,
})

func checkJWT() gin.HandlerFunc {
	return func(c *gin.Context) {
		jwtMid := *jwtMiddleware
		if err := jwtMid.CheckJWT(c.Writer, c.Request); err != nil {
			c.AbortWithStatus(401)
		}
	}
}

func corsMiddleware() gin.HandlerFunc {
	return func(c *gin.Context) {
		c.Writer.Header().Set("Access-Control-Allow-Origin", "http://localhost:3000")
		c.Writer.Header().Set("Access-Control-Max-Age", "86400")
		c.Writer.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE, UPDATE")
		c.Writer.Header().Set("Access-Control-Allow-Headers", "Origin, Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization")
		c.Writer.Header().Set("Access-Control-Expose-Headers", "Content-Length")
		c.Writer.Header().Set("Access-Control-Allow-Credentials", "true")

		if c.Request.Method == "OPTIONS" {
			c.AbortWithStatus(200)
		} else {
			c.Next()
		}
	}
}

func startServer() {
	r := gin.Default()
	r.Use(corsMiddleware())

	r.GET("/ping", func(g *gin.Context) {
		g.JSON(200, gin.H{"text": "Hello from public"})
	})

	r.GET("/secured/ping", checkJWT(), func(g *gin.Context) {
		g.JSON(200, gin.H{"text": "Hello from private"})
	})

	r.Run(":3002")
}

hey thanks for this snippet, help me a lot!
may i know where did you get the information about jwMiddleware has checkjwt() function? (line 23)

Awesome, you helped me out alot. None of the popular CORS frameworks was working for me, but this did!