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jwt.go
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jwt.go
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package middleware
import (
"MyGlog/utils"
"MyGlog/utils/errmsg"
"github.com/dgrijalva/jwt-go"
"github.com/gin-gonic/gin"
"log"
"net/http"
"strings"
"time"
)
var JwtKey = []byte(utils.JwtKey)
var code int
type MyCliams struct {
Username string `json:"username"`
jwt.StandardClaims
}
// 生成token
func SetToken(username string) (string, int) {
expireTime := time.Now().Add(10 * time.Hour)
SetCliams := MyCliams{
username,
jwt.StandardClaims{
ExpiresAt: expireTime.Unix(),
Issuer: "superM",
},
}
reqCliams := jwt.NewWithClaims(jwt.SigningMethodHS256, SetCliams)
token, err := reqCliams.SignedString(JwtKey)
if err != nil {
log.Println(err.Error())
return "", errmsg.ERROR
}
return token, errmsg.SUCCESS
}
// 验证token
func CheckToken(token string) (*MyCliams, int) {
settoken, err := jwt.ParseWithClaims(token, &MyCliams{}, func(*jwt.Token) (interface{}, error) {
return JwtKey, nil
})
if err != nil {
return nil, errmsg.ERROR
}
if settoken != nil {
if key, ok := settoken.Claims.(*MyCliams); ok && settoken.Valid {
return key, errmsg.SUCCESS
}
}
return nil, errmsg.ERROR
}
// jwt中间件
func JwtToken() gin.HandlerFunc {
return func(c *gin.Context) {
tokenHeader := c.Request.Header.Get("Authorization")
code = errmsg.SUCCESS
if tokenHeader == "" {
code = errmsg.ERROR_TOKEN_NOT_EXIST
c.JSON(http.StatusOK, gin.H{
"code": code,
"msg": errmsg.GetErrMsg(code),
})
c.Abort()
return
}
checkToken := strings.SplitN(tokenHeader, " ", 2)
if len(checkToken) != 2 || checkToken[0] != "Bearer" {
code = errmsg.ERROR_TOKEN_FORMAT_WRONG
c.JSON(http.StatusOK, gin.H{
"code": code,
"msg": errmsg.GetErrMsg(code),
})
c.Abort()
return
}
key, checkcode := CheckToken(checkToken[1])
if checkcode == errmsg.ERROR {
code = errmsg.ERROR_TOKEN_WRONG
c.JSON(http.StatusOK, gin.H{
"code": code,
"msg": errmsg.GetErrMsg(code),
})
c.Abort()
return
}
if time.Now().Unix() > key.ExpiresAt {
code = errmsg.ERROR_TOKEN_RUNTIME_OUT
c.JSON(http.StatusOK, gin.H{
"code": code,
"msg": errmsg.GetErrMsg(code),
})
c.Abort()
return
}
c.Set("username", key.Username)
c.Next()
}
}