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| .map((e) => e.toRadixString(16).padLeft(2, '0')) | ||
| .join() | ||
| .replaceAllMapped( | ||
| RegExp(r'(\w{8})(\w{4})(\w{4})(\w{4})(\w{12})'), | ||
| (m) => '${m[1]}-${m[2]}-${m[3]}-${m[4]}-${m[5]}', | ||
| ); |
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I've done this other places the classical implementation is:
final bytes = _randomBytes(16);
// Set V4 bits according to:
// https://tools.ietf.org/html/rfc4122#section-4.4
bytes[6] = (bytes[6] & 0x0f) | 0x40;
bytes[8] = (bytes[8] & 0x3f) | 0x80;
// Encode as UUIDv4
final s = hex.encode(bytes).substring;
return '${s(0, 8)}-${s(8, 12)}-${s(12, 16)}-${s(16, 20)}-${s(20)}';
Maybe, using toRadixString is nicer, since it avoids a dependency on package:convert.
| final out = scope<ffi.Uint8>(16); | ||
| _checkOp(ssl.RAND_bytes(out, 16) == 1); | ||
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| var bytes = out.asTypedList(16); |
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Maybe, we could just use fillRandomBytes, then we have less FFI stuff going on.
| check(uuid[8] == '-'); | ||
| check(uuid[13] == '-'); | ||
| check(uuid[18] == '-'); | ||
| check(uuid[23] == '-'); |
| /// } | ||
| /// | ||
| /// ``` | ||
| String randomUUID() => webCryptImpl.random.randomUUID(); |
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This generates a UUIDv4, there is a specification let's explain that:
https://tools.ietf.org/html/rfc4122#section-4.4
| /// } | ||
| /// | ||
| /// ``` | ||
| String randomUUID() => webCryptImpl.random.randomUUID(); |
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The name of the function in Dart should follow conventions:
https://dart.dev/effective-dart/style#do-capitalize-acronyms-and-abbreviations-longer-than-two-letters-like-words
randomUuid(), however, ugly 🙈
We could choose to just call it uuid(), I don't know. We do change names from Javascript when implementing them in Dart, like how getRandomValues became fillRandomBytes.
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uuid() looks good.
To add to this - based on the last discussion on randomUUID on w3c, support for UUIDv7 (or other variants), if added, would be in the form of parameters.
If someday webcrypto introduces ULID, it will likely be another in another class and that would be an issue for another day.
As for now, and for the near future as well, uuid() solves our purpose.
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Thank you for your feedback! I am currently in the middle of my examinations and will make the requested changes as soon as I get time. |
3 participants
Implement
randomUUIDinwebcrypto.dartChanges
randomUUID()method.randomUUIDimplementation, so implemented it based on the W3C spec.Testing
Notes