go使用gin结合jwt做登录功能

1、安装gin

go get -u github.com/gin-gonic/gin

2、安装session

go get github.com/gin-contrib/sessions

3、安装JWT鉴权

go get "github.com/golang-jwt/jwt/v4"

4、创建一个jwt的工具文件

package utilsimport ("errors""github.com/golang-jwt/jwt/v4""time"
)type MyClaims struct {Phone                string `json:"phone"`jwt.RegisteredClaims        // 注意!这是jwt-go的v4版本新增的，原先是jwt.StandardClaims
}var MySecret = []byte("wjdsg") // 定义secret，后面会用到func Secret() jwt.Keyfunc {return func(token *jwt.Token) (interface{}, error) {return []byte(MySecret), nil // 这是我的secret}
}// 这里传入的是手机号，因为我项目登陆用的是手机号和密码
func MakeToken(phone string) (tokenString string, err error) {claim := MyClaims{Phone: phone,RegisteredClaims: jwt.RegisteredClaims{ExpiresAt: jwt.NewNumericDate(time.Now().Add(3 * time.Hour * time.Duration(1))), // 过期时间3小时IssuedAt:  jwt.NewNumericDate(time.Now()),                                       // 签发时间NotBefore: jwt.NewNumericDate(time.Now()),                                       // 生效时间}}token := jwt.NewWithClaims(jwt.SigningMethodHS256, claim) // 使用HS256算法tokenString, err = token.SignedString(MySecret)return tokenString, err
}// 解析jwt
func ParseToken(tokenss string) (*MyClaims, error) {token, err := jwt.ParseWithClaims(tokenss, &MyClaims{}, Secret())if err != nil {if ve, ok := err.(*jwt.ValidationError); ok {if ve.Errors&jwt.ValidationErrorMalformed != 0 {return nil, errors.New("非法令牌")} else if ve.Errors&jwt.ValidationErrorExpired != 0 {return nil, errors.New("令牌国企")} else if ve.Errors&jwt.ValidationErrorNotValidYet != 0 {return nil, errors.New("令牌未激活")} else {return nil, errors.New("令牌未知错误")}}}if claims, ok := token.Claims.(*MyClaims); ok && token.Valid {return claims, nil}return nil, errors.New("couldn't handle this token")
}

5、开始使用

package mainimport ("awesomeProject/utils""fmt""github.com/gin-contrib/sessions""github.com/gin-contrib/sessions/cookie""github.com/gin-gonic/gin""net/http"
)func main() {// 初始化gin服务rootRouter := gin.Default()// 创建cookie存储store := cookie.NewStore([]byte("secret"))//路由上加入session中间件rootRouter.Use(sessions.Sessions("mysession", store))//配置路由组group := rootRouter.Group("/wjdsg"){group.GET("/set", func(context *gin.Context) {session := sessions.Default(context)token, err := utils.MakeToken("15088888888")if err != nil {fmt.Println("jwt生产错误")}//将jwt保持到session中session.Set("adminId", token)session.Save()context.JSON(http.StatusOK, token)})group.GET("/get", func(context *gin.Context) {//获取jwtsession := sessions.Default(context)token := session.Get("adminId").(string)//解析jwtparseToken, err := utils.ParseToken(token)if err != nil {fmt.Println("jwt解析错误：", err)}m := make(map[string]interface{})m["jwt"] = tokenm["解析"] = parseTokencontext.JSON(http.StatusOK, m)})}//启动http服务，可以修改端口address := fmt.Sprintf(":%d", 8080)rootRouter.Run(address)
}

6、结果