61 lines
1.5 KiB
Go
61 lines
1.5 KiB
Go
// service/jwt_service.go
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package service
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import (
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"errors"
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"fmt"
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"time"
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"github.com/golang-jwt/jwt/v5"
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)
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type JWTService interface {
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GenerateToken(userID uint, email string) (string, error)
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ValidateToken(tokenString string) (*jwt.Token, error)
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ExtractUserID(token *jwt.Token) (uint, error)
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}
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type jwtService struct {
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secretKey string
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}
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func NewJWTService(secretKey string) JWTService {
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return &jwtService{secretKey: secretKey}
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}
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type Claims struct {
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UserID uint `json:"user_id"`
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Email string `json:"email"`
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jwt.RegisteredClaims
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}
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func (j *jwtService) GenerateToken(userID uint, email string) (string, error) {
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claims := &Claims{
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UserID: userID,
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Email: email,
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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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},
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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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func (j *jwtService) ValidateToken(tokenString string) (*jwt.Token, error) {
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return 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, fmt.Errorf("unexpected signing method: %v", token.Header["alg"])
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}
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return []byte(j.secretKey), nil
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})
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}
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func (j *jwtService) ExtractUserID(token *jwt.Token) (uint, error) {
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claims, ok := token.Claims.(*Claims)
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if !ok {
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return 0, errors.New("invalid token claims")
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}
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return claims.UserID, nil
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} |