添加jwt验证方法

utill/jwtUt.go

@@ -0,0 +1,106 @@
+package utill
+
+import (
+	"fmt"
+	"github.com/gin-gonic/gin"
+	"github.com/golang-jwt/jwt/v5"
+	"time"
+	"toutoukan/config"
+	"toutoukan/init/redisInit"
+	"toutoukan/model/usermodel"
+)
+
+// 生成JWT并存储到Redis
+func GenerateJWTAndStore(openid string) (string, error) {
+	// 1. 生成JWT
+	expirationTime := time.Now().Add(2 * time.Hour)
+	claims := &usermodel.JWTClaims{
+		OpenID: openid,
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(expirationTime),
+			IssuedAt:  jwt.NewNumericDate(time.Now()),
+			Issuer:    "toutoukan",
+		},
+	}
+
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+	tokenString, err := token.SignedString([]byte(config.Conf.Jwtsecret))
+	if err != nil {
+		return "", err
+	}
+
+	// 2. 存储到Redis（键：jwt:{token}，值：openid，过期时间与JWT一致）
+	redisKey := fmt.Sprintf("jwt:%s", tokenString)
+	err = redisInit.RedisClient.Set(
+		redisInit.Ctx,
+		redisKey,
+		openid,
+		2*time.Hour,
+	).Err()
+
+	return tokenString, err
+}
+
+// 验证JWT并检查Redis
+func ValidateJWTWithRedis(tokenString string) (*usermodel.JWTClaims, error) {
+	// 1. 先验证JWT签名和过期时间
+	token, err := jwt.ParseWithClaims(
+		tokenString,
+		&usermodel.JWTClaims{},
+		func(token *jwt.Token) (interface{}, error) {
+			if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
+				return nil, jwt.ErrSignatureInvalid
+			}
+			return []byte(config.Conf.Jwtsecret), nil
+		},
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	// 2. 验证Redis中是否存在（防止已登出的令牌）
+	redisKey := fmt.Sprintf("jwt:%s", tokenString)
+	exists, err := redisInit.RedisClient.Exists(redisInit.Ctx, redisKey).Result()
+	if err != nil {
+		return nil, fmt.Errorf("redis查询失败: %w", err)
+	}
+	if exists == 0 {
+		return nil, fmt.Errorf("令牌已失效")
+	}
+
+	// 3. 验证声明有效性
+	if claims, ok := token.Claims.(*usermodel.JWTClaims); ok && token.Valid {
+		return claims, nil
+	}
+	return nil, jwt.ErrSignatureInvalid
+}
+
+// 辅助函数：从请求头提取令牌
+func ExtractTokenFromHeader(c *gin.Context) string {
+	authHeader := c.GetHeader("Authorization")
+	var tokenString string
+	fmt.Sscanf(authHeader, "Bearer %s", &tokenString)
+	return tokenString
+}
+
+// JWT+Redis验证中间件
+func JWTAuthMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		tokenString := ExtractTokenFromHeader(c)
+		if tokenString == "" {
+			c.JSON(401, gin.H{"error": "请先登录", "code": "10033"})
+			c.Abort()
+			return
+		}
+
+		claims, err := ValidateJWTWithRedis(tokenString)
+		if err != nil {
+			c.JSON(401, gin.H{"error": "令牌无效或已过期", "code": "10034"})
+			c.Abort()
+			return
+		}
+
+		c.Set("openid", claims.OpenID)
+		c.Next()
+	}
+}