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jwt.go
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jwt.go
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package authentication
import (
"fmt"
"strconv"
"time"
"github.com/qingwave/weave/pkg/model"
"github.com/golang-jwt/jwt/v4"
)
const (
Issuer = "weave.io"
)
type CustomClaims struct {
ID uint `json:"id"`
Name string `json:"name"`
jwt.RegisteredClaims
}
type JWTService struct {
signKey []byte
issuer string
expireDuration time.Duration
}
func NewJWTService(secret string) *JWTService {
return &JWTService{
signKey: []byte(secret),
issuer: Issuer,
expireDuration: 7 * 24 * time.Hour,
}
}
func (s *JWTService) CreateToken(user *model.User) (string, error) {
if user == nil {
return "", fmt.Errorf("empty user")
}
now := time.Now()
token := jwt.NewWithClaims(
jwt.SigningMethodHS256,
CustomClaims{
Name: user.Name,
ID: user.ID,
RegisteredClaims: jwt.RegisteredClaims{
ExpiresAt: jwt.NewNumericDate(now.Add(s.expireDuration)),
NotBefore: jwt.NewNumericDate(now.Add(-1000 * time.Second)),
ID: strconv.Itoa(int(user.ID)),
Issuer: s.issuer,
},
},
)
return token.SignedString(s.signKey)
}
func (s *JWTService) ParseToken(tokenString string) (*model.User, error) {
token, err := jwt.ParseWithClaims(tokenString, &CustomClaims{}, func(token *jwt.Token) (i interface{}, err error) {
return s.signKey, nil
})
if err != nil {
return nil, err
}
claims, ok := token.Claims.(*CustomClaims)
if !ok || !token.Valid {
return nil, fmt.Errorf("invaild token")
}
user := &model.User{
ID: claims.ID,
Name: claims.Name,
}
return user, nil
}