Examples
Go Authentication API
Building an Authentication API
Go authentication API uses JWT for secure endpoints.
Introduction to JWT in Go
JSON Web Tokens (JWT) are an open standard used to share security information between a client and a server. Each JWT contains encoded JSON objects, including a set of claims. JWTs are signed using a cryptographic algorithm to ensure that the claims cannot be altered after the token is issued.
In Go, JWTs are commonly used to secure API endpoints by verifying the authenticity of requests. In this guide, we'll explore how to implement JWT authentication in a Go application.
Setting Up the Go Project
To get started, ensure you have Go installed on your machine. Initialize a new Go project and install the necessary packages:
Creating a JWT Token
The first step in JWT authentication is to create a token for authenticated users. You will need to define a secret key and use it to sign your tokens. Here's an example of how to create a JWT token in Go:
Verifying a JWT Token
Once a token is generated, it must be verified for authenticity on secure endpoints. Here is how you can verify a JWT token in your Go application:
Protecting Endpoints with JWT
To protect your API endpoints, you can create middleware that checks for the presence and validity of a JWT in the request headers. Here's an example of how to implement this:
In this example, the jwtMiddleware function intercepts incoming requests, checks for a valid JWT, and allows access to the endpoint if the token is verified. Otherwise, it returns a 403 Forbidden status.
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