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jwt_writer.go
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/
jwt_writer.go
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package jwt
import (
"errors"
"github.com/golang-jwt/jwt/v5"
)
type JWTWriter struct {
Token *jwt.Token
}
func NewJWTWriter(token string) (*JWTWriter, error) {
// Parse the original JWT token
originalToken, _, err := new(jwt.Parser).ParseUnverified(token, jwt.MapClaims{})
if err != nil {
return nil, err
}
if originalToken == nil {
return nil, errors.New("invalid JWT token")
}
return &JWTWriter{Token: originalToken}, nil
}
func (j *JWTWriter) SignWithMethodAndKey(method jwt.SigningMethod, key interface{}) (string, error) {
// Create a new token with the new claims
newToken := jwt.NewWithClaims(method, j.Token.Claims)
// Sign the new token with the new secret key
tokenString, err := newToken.SignedString(key)
if err != nil {
return "", err
}
return tokenString, nil
}
func (j *JWTWriter) SignWithKey(key interface{}) (string, error) {
return j.SignWithMethodAndKey(j.Token.Method, key)
}