Building RESTful Web services with Go

Creating a JWT in Go

The jwt-go package has a function called NewWithClaims that takes two arguments:

1. Signing method such as HMAC256, RSA, and so on
2. Claims map

For example, it looks like the following code snippet:

token := jwt.NewWithClaims(jwt.SigningMethodHS256, jwt.MapClaims{
    "username": "admin",
    "iat":time.Now().Unix(),
})

jwt.SigningMethodHS256 is an encryption algorithm that is available within the package. The second argument is a map with claims such as private (here username) and reserved (issued at). Now we can generate a tokenString using the SignedString function on a token:

tokenString, err := token.SignedString("my_secret_key")

This tokenString then should be passed back to the client.