auth-verify-go-snippet.go

else {
	jwtToken := authHeader[1]
	token, err := jwt.Parse(jwtToken, func(token *jwt.Token) (interface{}, error) {
				if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
					return nil, fmt.Errorf("Unexpected signing method: %v", token.Header["alg"])
				}
				return []byte(SECRETKEY), nil
			})
			if claims, ok := token.Claims.(jwt.MapClaims); ok && token.Valid {
				ctx := context.WithValue(r.Context(), "props", claims)
				// Access context values in handlers like this
				// props, _ := r.Context().Value("props").(jwt.MapClaims)
				next.ServeHTTP(w, r.WithContext(ctx))
			} else {
				fmt.Println(err)
				w.WriteHeader(http.StatusUnauthorized)
				w.Write([]byte("Unauthorized"))
			}
		}