Feature request: validate JWT tokens

[renatoargh]

I am asking for a feature not to decode the token but to check if a string is a jwt token.

I am not sure the best way to achieve this but I know that jwt tokens are formed by three base64 encoded strings separated by dots, this would be the simplest validation I suppose.

Thank you for the awesome work! :)

[IOAyman]

That would be a good validator 👍
The validation mechanisme of a JWT is well described in the RFC7519.

I'll submit a PR if I find some time in the weekend

[christiaanwesterbeek]

This is the simplified assertion I'm using currently:

assert.ok(/^[a-zA-Z0-9\-_]+\.[a-zA-Z0-9\-_]+\.[a-zA-Z0-9\-_]+$/.test(thing), 'is a valid jwt token')