71 lines
1.6 KiB
Go
71 lines
1.6 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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var (
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ErrTokenInvalid = errors.New("token无效")
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ErrTokenExpired = errors.New("token已过期")
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)
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// JWTClaims JWT声明
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type JWTClaims struct {
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UserID int `json:"user_id"`
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Username string `json:"username"`
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jwt.RegisteredClaims
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}
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// GenerateToken 生成JWT Token
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func GenerateToken(userID int, username, secret string, expiresInHours int) (string, error) {
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claims := JWTClaims{
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UserID: userID,
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Username: username,
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RegisteredClaims: jwt.RegisteredClaims{
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ExpiresAt: jwt.NewNumericDate(time.Now().Add(time.Duration(expiresInHours) * 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(secret))
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}
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// ParseToken 解析JWT Token
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func ParseToken(tokenString, secret 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("签名方法无效")
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}
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return []byte(secret), 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, ErrTokenInvalid
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}
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// ValidateToken 验证Token是否有效
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func ValidateToken(tokenString, secret string) error {
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claims, err := ParseToken(tokenString, secret)
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if err != nil {
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return err
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}
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if claims.ExpiresAt != nil && claims.ExpiresAt.Time.Before(time.Now()) {
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return ErrTokenExpired
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}
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return nil
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}
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