![]() The server routes will have to check for the presence of a valid JWT in the Authorization header to grant a user access to a protected resource. The content of the header should look like the syntax below: Authorization: Bearer Whenever the user wants to access a protected route or resource, the user agent sends the same JWT, typically in the Authorization header using the Bearer schema. In JWT authentication-based systems, when a user successfully logs in using their credentials, a JSON Web Token will be returned back to the calling client. ![]() In this article, we’ll learn how to perform authentication requests on a Vue client app with a Node.js backend. But first, let’s review how JWT works in detail. To ensure that a JWT is valid, only the party holding the key or secret is responsible for signing the information. Once the backend server verifies that the signature is valid, it extracts the user data from the token as required. Once a user has logged into an app, a JWT is created on the server and returned back to the calling client, which is a common flow for JWT-based authentication systems.Įach subsequent request will include the JWT as an authorization header, allowing access to protected routes and resources. JWTs are commonly used for either authentication or to safely transmit information across different parties. Together with the header and the payload, a signature can be used to generate or construct a JWT. ![]() The signature can either be a secret or a public/private key pair. ![]() JWT, an acronym for JSON Web Token, is an open standard that allows developers to verify the authenticity of a type of information known as a claim via a signature. Editor’s note: This article was last updated on 23 March 2022 to correct bugs in the sample code and include up-to-date packages. ![]()
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