112 lines
2.8 KiB
Go
112 lines
2.8 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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"license-manager/internal/config"
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)
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type Claims struct {
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UserID int `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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var (
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ErrTokenExpired = errors.New("token has expired")
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ErrTokenNotValid = errors.New("token is not valid")
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ErrTokenMalformed = errors.New("token is malformed")
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ErrTokenNotFound = errors.New("token not found")
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)
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// GenerateToken 生成JWT Token
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func GenerateToken(userID int, username, role string) (string, error) {
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cfg := config.GetConfig()
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if cfg == nil {
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return "", errors.New("config not initialized")
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}
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expireTime := time.Now().Add(time.Duration(cfg.Auth.JWT.ExpireHours) * time.Hour)
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claims := &Claims{
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UserID: userID,
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Username: username,
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Role: role,
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RegisteredClaims: jwt.RegisteredClaims{
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ExpiresAt: jwt.NewNumericDate(expireTime),
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IssuedAt: jwt.NewNumericDate(time.Now()),
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NotBefore: jwt.NewNumericDate(time.Now()),
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Issuer: "license-manager",
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},
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}
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token := jwt.NewWithClaims(jwt.SigningMethodHS256, claims)
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tokenString, err := token.SignedString([]byte(cfg.Auth.JWT.Secret))
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if err != nil {
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return "", err
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}
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return tokenString, nil
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}
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// ParseToken 解析JWT Token
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func ParseToken(tokenString string) (*Claims, error) {
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cfg := config.GetConfig()
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if cfg == nil {
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return nil, errors.New("config not initialized")
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}
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token, err := jwt.ParseWithClaims(tokenString, &Claims{}, 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(cfg.Auth.JWT.Secret), nil
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})
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if err != nil {
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if errors.Is(err, jwt.ErrTokenExpired) {
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return nil, ErrTokenExpired
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}
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if errors.Is(err, jwt.ErrTokenMalformed) {
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return nil, ErrTokenMalformed
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}
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return nil, ErrTokenNotValid
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}
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if claims, ok := token.Claims.(*Claims); ok && token.Valid {
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return claims, nil
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}
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return nil, ErrTokenNotValid
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}
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// ValidateToken 验证Token是否有效
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func ValidateToken(tokenString string) (*Claims, error) {
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return ParseToken(tokenString)
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}
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// RefreshTokenIfNeeded 检查Token是否需要刷新，如果需要则返回新Token
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func RefreshTokenIfNeeded(tokenString string) (string, error) {
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claims, err := ParseToken(tokenString)
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if err != nil {
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return "", err
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}
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cfg := config.GetConfig()
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if cfg == nil {
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return "", errors.New("config not initialized")
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}
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// 检查是否需要刷新（剩余时间少于阈值）
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thresholdDuration := time.Duration(cfg.Auth.JWT.RefreshThresholdMinutes) * time.Minute
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if time.Until(claims.ExpiresAt.Time) < thresholdDuration {
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// 生成新Token
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return GenerateToken(claims.UserID, claims.Username, claims.Role)
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}
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// 不需要刷新，返回原Token
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return tokenString, nil
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} |