Learn Angular: 4 Angular Projects by Manjunath M & Jeremy Wilken & Simon Holmes & Ilya Bodrov-Krukowski

Author:Manjunath M & Jeremy Wilken & Simon Holmes & Ilya Bodrov-Krukowski [M, Manjunath]
Language: eng
Format: epub
Publisher: SitePoint
Published: 2018-06-14T23:00:00+00:00

Getting Data from a JWT

When we set the data for the JWT (in the generateJwt Mongoose method) we included the expiry date in an exp property. But if you look at a JWT, it seems to be a random string, like this following example:

eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJfaWQiOiI1NWQ0MjNjMTUxMzcxMmNkMzE3YTRkYT ciLCJlbWFpbCI6InNpbW9uQGZ1bGxzdGFja3RyYWluaW5nLmNvbSIsIm5hbWUiOiJTaW1vbiBIb2xtZ XMiLCJleHAiOjE0NDA1NzA5NDUsImlhdCI6MTQzOTk2NjE0NX0.jS50GlmolxLoKrA_24LDKaW3vNaY 94Y9EqYAFvsTiLg

So how do you read a JWT?

A JWT is actually made up of three separate strings, separated by a dot .. These three parts are:

Header — an encoded JSON object containing the type and the hashing algorithm used

Payload — an encoded JSON object containing the data, the real body of the token

Signature — an encrypted hash of the header and payload, using the “secret” set on the server.

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