init

serve/internal/middleware/auth.go

@@ -0,0 +1,183 @@
+package middleware
+
+import (
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/Nanqipro/YunQue-Tech-Projects/ai_english_learning/serve/config"
+	"github.com/Nanqipro/YunQue-Tech-Projects/ai_english_learning/serve/internal/common"
+	"github.com/Nanqipro/YunQue-Tech-Projects/ai_english_learning/serve/internal/utils"
+	"github.com/gin-gonic/gin"
+	"github.com/golang-jwt/jwt/v5"
+)
+
+// JWTClaims JWT声明结构
+type JWTClaims struct {
+	UserID   int64 `json:"user_id"`
+	Username string `json:"username"`
+	Email    string `json:"email"`
+	Type     string `json:"type"` // access, refresh
+	jwt.RegisteredClaims
+}
+
+// GenerateTokens 生成访问令牌和刷新令牌
+func GenerateTokens(userID int64, username, email string) (accessToken, refreshToken string, err error) {
+	cfg := config.GlobalConfig
+	now := time.Now()
+	
+	// 生成访问令牌
+	accessClaims := JWTClaims{
+		UserID:   userID,
+		Username: username,
+		Email:    email,
+		Type:     "access",
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(now.Add(time.Duration(cfg.JWT.AccessTokenTTL) * time.Second)),
+			IssuedAt:  jwt.NewNumericDate(now),
+			NotBefore: jwt.NewNumericDate(now),
+			Issuer:    cfg.App.Name,
+			Subject:   utils.Int64ToString(userID),
+			ID:        utils.GenerateUUID(),
+		},
+	}
+	
+	accessTokenObj := jwt.NewWithClaims(jwt.SigningMethodHS256, accessClaims)
+	accessToken, err = accessTokenObj.SignedString([]byte(cfg.JWT.Secret))
+	if err != nil {
+		return "", "", err
+	}
+	
+	// 生成刷新令牌
+	refreshClaims := JWTClaims{
+		UserID:   userID,
+		Username: username,
+		Email:    email,
+		Type:     "refresh",
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(now.Add(time.Duration(cfg.JWT.RefreshTokenTTL) * time.Second)),
+			IssuedAt:  jwt.NewNumericDate(now),
+			NotBefore: jwt.NewNumericDate(now),
+			Issuer:    cfg.App.Name,
+			Subject:   utils.Int64ToString(userID),
+			ID:        utils.GenerateUUID(),
+		},
+	}
+	
+	refreshTokenObj := jwt.NewWithClaims(jwt.SigningMethodHS256, refreshClaims)
+	refreshToken, err = refreshTokenObj.SignedString([]byte(cfg.JWT.Secret))
+	if err != nil {
+		return "", "", err
+	}
+	
+	return accessToken, refreshToken, nil
+}
+
+// ParseToken 解析JWT令牌
+func ParseToken(tokenString string) (*JWTClaims, error) {
+	cfg := config.GlobalConfig
+	
+	token, err := jwt.ParseWithClaims(tokenString, &JWTClaims{}, func(token *jwt.Token) (interface{}, error) {
+		return []byte(cfg.JWT.Secret), nil
+	})
+	
+	if err != nil {
+		return nil, err
+	}
+	
+	if claims, ok := token.Claims.(*JWTClaims); ok && token.Valid {
+		return claims, nil
+	}
+	
+	return nil, jwt.ErrInvalidKey
+}
+
+// AuthMiddleware JWT认证中间件
+func AuthMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		// 从请求头获取token
+		authHeader := c.GetHeader("Authorization")
+		if authHeader == "" {
+			common.UnauthorizedResponse(c, "缺少认证令牌")
+			c.Abort()
+			return
+		}
+		
+		// 检查Bearer前缀
+		parts := strings.SplitN(authHeader, " ", 2)
+		if len(parts) != 2 || parts[0] != "Bearer" {
+			common.UnauthorizedResponse(c, "认证令牌格式错误")
+			c.Abort()
+			return
+		}
+		
+		tokenString := parts[1]
+		
+		// 解析token
+		claims, err := ParseToken(tokenString)
+		if err != nil {
+			if err == jwt.ErrTokenExpired {
+				common.ErrorResponse(c, http.StatusUnauthorized, "访问令牌已过期")
+			} else {
+				common.UnauthorizedResponse(c, "无效的访问令牌")
+			}
+			c.Abort()
+			return
+		}
+		
+		// 检查token类型
+		if claims.Type != "access" {
+			common.UnauthorizedResponse(c, "令牌类型错误")
+			c.Abort()
+			return
+		}
+		
+		// 将用户信息存储到上下文中
+		c.Set("user_id", claims.UserID)
+		c.Set("username", claims.Username)
+		c.Set("email", claims.Email)
+		
+		c.Next()
+	}
+}
+
+// OptionalAuthMiddleware 可选认证中间件（不强制要求登录）
+func OptionalAuthMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		// 从请求头获取token
+		authHeader := c.GetHeader("Authorization")
+		if authHeader == "" {
+			c.Next()
+			return
+		}
+		
+		// 检查Bearer前缀
+		parts := strings.SplitN(authHeader, " ", 2)
+		if len(parts) != 2 || parts[0] != "Bearer" {
+			c.Next()
+			return
+		}
+		
+		tokenString := parts[1]
+		
+		// 解析token
+		claims, err := ParseToken(tokenString)
+		if err != nil {
+			c.Next()
+			return
+		}
+		
+		// 检查token类型
+		if claims.Type != "access" {
+			c.Next()
+			return
+		}
+		
+		// 将用户信息存储到上下文中
+		c.Set("user_id", claims.UserID)
+		c.Set("username", claims.Username)
+		c.Set("email", claims.Email)
+		
+		c.Next()
+	}
+}