backend-linksee-api/utils/jwt.go

package utils

import (
	"github.com/dgrijalva/jwt-go"
	"github.com/gin-gonic/gin"
	"strconv"
	"time"
)

var jwtSecret = []byte("martin")

type Claims struct {
	Username string `json:"username"`
	Rolename string `json:"rolename"`
	UserId   string `json:"userid"`
	Id       int    `json:"id"`
	jwt.StandardClaims
}

func GenerateToken(username, rolename, userid string, id int) (string, error) {
	nowTime := time.Now()
	expireTime := nowTime.Add(3 * time.Hour)

	claims := Claims{
		username,
		rolename,
		userid,
		id,
		jwt.StandardClaims{
			ExpiresAt: expireTime.Unix(),
			Issuer:    "gin-blog",
		},
	}

	tokenClaims := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
	token, err := tokenClaims.SignedString(jwtSecret)

	return token, err
}

func ParseToken(token string) (*Claims, error) {
	tokenClaims, err := jwt.ParseWithClaims(token, &Claims{}, func(token *jwt.Token) (interface{}, error) {
		return jwtSecret, nil
	})

	if tokenClaims != nil {
		if claims, ok := tokenClaims.Claims.(*Claims); ok && tokenClaims.Valid {
			return claims, nil
		}
	}

	return nil, err
}

func GetId(c *gin.Context) int64 {
	valueString := c.GetString("CONTEXT_ID")
	val, _ := strconv.ParseInt(valueString, 10, 64)
	return val
}

func GetUserId(c *gin.Context) int64 {
	valueString := c.GetString("CONTEXT_USER_ID")
	val, _ := strconv.ParseInt(valueString, 10, 64)
	return val
}

func GetRoleName(c *gin.Context) string {
	return c.GetString("CONTEXT_ROLE_NAME")
}