Initial commit: 网络验证平台

backend/pkg/jwt/jwt.go

@@ -0,0 +1,75 @@
+package jwt
+
+import (
+	"errors"
+	"time"
+	"verification-platform-backend/internal/config"
+
+	"github.com/golang-jwt/jwt/v5"
+)
+
+// Claims JWT声明
+type Claims struct {
+	UserID   uint   `json:"user_id"`
+	Username string `json:"username"`
+	Role     string `json:"role"`
+	jwt.RegisteredClaims
+}
+
+// GenerateToken 生成JWT令牌
+func GenerateToken(userID uint, username, role string) (string, error) {
+	expireHours := config.GetInt("app.jwt_expire_hours")
+	if expireHours <= 0 {
+		expireHours = 24
+	}
+
+	expiresAt := time.Now().Add(time.Hour * time.Duration(expireHours))
+
+	claims := Claims{
+		UserID:   userID,
+		Username: username,
+		Role:     role,
+		RegisteredClaims: jwt.RegisteredClaims{
+			ExpiresAt: jwt.NewNumericDate(expiresAt),
+			IssuedAt:  jwt.NewNumericDate(time.Now()),
+			NotBefore: jwt.NewNumericDate(time.Now()),
+			Issuer:    config.GetString("app.name"),
+		},
+	}
+
+	token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
+	return token.SignedString([]byte(config.GetString("app.jwt_secret")))
+}
+
+// ParseToken 解析JWT令牌
+func ParseToken(tokenString string) (*Claims, error) {
+	token, err := jwt.ParseWithClaims(tokenString, &Claims{}, func(token *jwt.Token) (interface{}, error) {
+		return []byte(config.GetString("app.jwt_secret")), nil
+	})
+
+	if err != nil {
+		return nil, err
+	}
+
+	if claims, ok := token.Claims.(*Claims); ok && token.Valid {
+		return claims, nil
+	}
+
+	return nil, errors.New("invalid token")
+}
+
+// RefreshToken 刷新令牌
+func RefreshToken(tokenString string) (string, error) {
+	claims, err := ParseToken(tokenString)
+	if err != nil {
+		return "", err
+	}
+
+	// 检查令牌是否即将过期（30分钟内）
+	if time.Until(claims.ExpiresAt.Time) > 30*time.Minute {
+		return "", errors.New("token is still valid")
+	}
+
+	// 生成新令牌
+	return GenerateToken(claims.UserID, claims.Username, claims.Role)
+}