81 lines
1.9 KiB
Go
81 lines
1.9 KiB
Go
package utils
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import (
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"errors"
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"time"
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"github.com/golang-jwt/jwt/v5"
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)
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// JWTClaims JWT声明
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type JWTClaims struct {
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UserID uint `json:"user_id"`
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Username string `json:"username"`
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Role string `json:"role"`
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jwt.RegisteredClaims
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}
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// JWTManager JWT管理器
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type JWTManager struct {
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secretKey string
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}
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// NewJWTManager 创建JWT管理器
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func NewJWTManager(secretKey string) *JWTManager {
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return &JWTManager{
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secretKey: secretKey,
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}
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}
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// GenerateToken 生成JWT token
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func (j *JWTManager) GenerateToken(userID uint, username string) (string, error) {
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claims := JWTClaims{
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UserID: userID,
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Username: username,
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Role: "", // 不再使用role字段
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RegisteredClaims: jwt.RegisteredClaims{
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ExpiresAt: jwt.NewNumericDate(time.Now().Add(24 * time.Hour)),
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IssuedAt: jwt.NewNumericDate(time.Now()),
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NotBefore: jwt.NewNumericDate(time.Now()),
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},
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}
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token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
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return token.SignedString([]byte(j.secretKey))
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}
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// ParseToken 解析JWT token
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func (j *JWTManager) ParseToken(tokenString string) (*JWTClaims, error) {
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token, err := jwt.ParseWithClaims(tokenString, &JWTClaims{}, func(token *jwt.Token) (interface{}, error) {
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if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
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return nil, errors.New("unexpected signing method")
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}
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return []byte(j.secretKey), nil
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})
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if err != nil {
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return nil, err
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}
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if claims, ok := token.Claims.(*JWTClaims); ok && token.Valid {
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return claims, nil
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}
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return nil, errors.New("invalid token")
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}
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// RefreshToken 刷新token
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func (j *JWTManager) RefreshToken(tokenString string) (string, error) {
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claims, err := j.ParseToken(tokenString)
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if err != nil {
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return "", err
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}
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// 检查token是否即将过期（剩余时间少于1小时）
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if time.Until(claims.ExpiresAt.Time) < time.Hour {
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return j.GenerateToken(claims.UserID, claims.Username)
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}
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return tokenString, nil
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}
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