flutter pub add jwt_decoder根據套件公開資料產生的選型評估，僅供參考。
jwt_decoder 套件是一個輕量級的 Dart 庫，專為高效解碼 JSON Web 權杖 (JWT) 而設計。它讓開發者能夠從 JWT 中提取載入資料，並檢查權杖是否已過期。此套件以簡單性為設計核心，支援所有主要平台，包括 Android、iOS、Web、macOS、Windows 和 Linux。該套件非常適合需要安全處理權杖的應用程式，例如依賴 JWT 進行使用者會話管理的驗證系統或 API 整合。
以下為關聯原始碼儲存庫的 README 原文快照，最新內容請造訪原始碼儲存庫。
This is a small library for decoding a json web token for dart / flutter. Since the header and payload is base64 encoded you can easily know the stored data with no password, you can also know if the token is expired or not.
If you like this library there's a version for Vue here. And for React here
main () {
String yourToken = "Your JWT";
Map<String, dynamic> decodedToken = JwtDecoder.decode(yourToken);
/*
If the token has a valid format, you will get a Map<String, dynamic>
Your decoded token can look like:
{
"sub": "1234567890",
"name": "Gustavo",
"iat": 1516239022,
"exp": 1516239022,
"randomKey": "something else"
}
*/
}
main () {
String yourToken = "Your JWT";
bool hasExpired = JwtDecoder.isExpired(yourToken);
// You will get a true / false response
// true: if the token is already expired
// false: if the token is not expired
}
main () {
String yourToken = "Your JWT";
DateTime expirationDate = JwtDecoder.getExpirationDate(token);
// 2025-01-13 13:04:18.000
print(expirationDate);
}
// Token payload must include an 'iat' field
main () {
String yourToken = "Your JWT";
Duration tokenTime = JwtDecoder.getTokenTime(token);
// 15
print(tokenTime.inDays);
}
MIT