feat: Initial commit

internal/utils/token.go

@@ -0,0 +1,48 @@
+package utils
+
+import (
+	"errors"
+	"time"
+
+	"baihu/internal/constant"
+
+	"github.com/golang-jwt/jwt/v5"
+)
+
+type Claims struct {
+	UserID   uint   `json:"user_id"`
+	Username string `json:"username"`
+	jwt.RegisteredClaims
+}
+
+// GenerateToken 生成 JWT token
+func GenerateToken(userID uint, username string) (string, error) {
+	claims := Claims{
+		UserID:   userID,
+		Username: username,
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(time.Now().Add(time.Duration(constant.TokenExpireDays) * 24 * time.Hour)),
+			IssuedAt:  jwt.NewNumericDate(time.Now()),
+		},
+	}
+
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+	return token.SignedString([]byte(constant.JWTSecret))
+}
+
+// ParseToken 解析 JWT token
+func ParseToken(tokenString string) (uint, string, error) {
+	token, err := jwt.ParseWithClaims(tokenString, &Claims{}, func(token *jwt.Token) (any, error) {
+		return []byte(constant.JWTSecret), nil
+	})
+
+	if err != nil {
+		return 0, "", err
+	}
+
+	if claims, ok := token.Claims.(*Claims); ok && token.Valid {
+		return claims.UserID, claims.Username, nil
+	}
+
+	return 0, "", errors.New("invalid token")
+}