Created
December 11, 2018 03:39
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JSON PARSER
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Map<String, dynamic> parseJwt(String token) { | |
final parts = token.split('.'); | |
if (parts.length != 3) { | |
throw Exception('invalid token'); | |
} | |
final payload = _decodeBase64(parts[1]); | |
final payloadMap = json.decode(payload); | |
if (payloadMap is! Map<String, dynamic>) { | |
throw Exception('invalid payload'); | |
} | |
return payloadMap; | |
} | |
String _decodeBase64(String str) { | |
String output = str.replaceAll('-', '+').replaceAll('_', '/'); | |
switch (output.length % 4) { | |
case 0: | |
break; | |
case 2: | |
output += '=='; | |
break; | |
case 3: | |
output += '='; | |
break; | |
default: | |
throw Exception('Illegal base64url string!"'); | |
} | |
return utf8.decode(base64Url.decode(output)); | |
} |
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