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wangpengfei

2023-07-14 5f00d720ea52ababeb10954da4d33ab6c46e93b7

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package middleware
 
import (
    "aps_crm/conf"
    "aps_crm/model"
    "aps_crm/pkg/contextx"
    "aps_crm/pkg/ecode"
    "aps_crm/pkg/logx"
    "aps_crm/service"
    "aps_crm/utils"
    "github.com/gin-gonic/gin"
    "strconv"
    "strings"
    "time"
)
 
var jwtService = service.ServiceGroup.JwtService
 
func JWTAuth() gin.HandlerFunc {
    return func(c *gin.Context) {
        ctx := new(contextx.Context).SetCtx(c)
        // 我们这里jwt鉴权取头部信息 Authorization 登录时回返回token信息 这里前端需要把token存储到cookie或者本地localStorage中 不过需要跟后端协商过期时间 可以约定刷新令牌或者重新登录
        token := c.Request.Header.Get("Authorization")
        if token == "" {
            ctx.Fail(ecode.JWTEmpty)
            c.Abort()
            return
        }
        slices := strings.Split(token, " ")
        if len(slices) == 2 {
            token = slices[1]
        }
        if jwtService.IsBlacklist(token) {
            ctx.Fail(ecode.JWTInBlackList)
            c.Abort()
            return
        }
        j := utils.NewJWT()
        // parseToken 解析token包含的信息
        claims, err := j.ParseToken(token)
        if err != nil {
            if err == utils.TokenExpired {
                ctx.Fail(ecode.JWTExpire)
                c.Abort()
                return
            }
            ctx.Fail(ecode.JWTParseErr)
            c.Abort()
            return
        }
 
        // 已登录用户被管理员禁用 需要使该用户的jwt失效 此处比较消耗性能 如果需要 请自行打开
        // 用户被删除的逻辑 需要优化 此处比较消耗性能 如果需要 请自行打开
 
        //if user, err := userService.FindUserByUuid(claims.UUID.String()); err != nil || user.Hidden == 2 {
        //    _ = jwtService.JsonInBlacklist(system.JwtBlacklist{Jwt: token})
        //    response.FailWithDetailed(gin.H{"reload": true}, err.Error(), c)
        //    c.Abort()
        //}
        if claims.ExpiresAt-time.Now().Unix() < claims.BufferTime {
            dr, _ := utils.ParseDuration(conf.Conf.JWT.ExpiresTime)
            claims.ExpiresAt = time.Now().Add(dr).Unix()
            newToken, _ := j.CreateTokenByOldToken(token, *claims)
            newClaims, _ := j.ParseToken(newToken)
            c.Header("new-token", newToken)
            c.Header("new-expires-at", strconv.FormatInt(newClaims.ExpiresAt, 10))
            if conf.Conf.System.UseMultipoint {
                RedisJwtToken, err := jwtService.GetRedisJWT(newClaims.Username)
                if err != nil {
                    logx.Errorf("get redis jwt failed err:%v", err)
                } else { // 当之前的取成功时才进行拉黑操作
                    _ = jwtService.JsonInBlacklist(model.JwtBlacklist{Jwt: RedisJwtToken})
                }
                // 无论如何都要记录当前的活跃状态
                _ = jwtService.SetRedisJWT(newToken, newClaims.Username)
            }
        }
        c.Set("claims", claims)
        c.Next()
    }
}