The library helps managing sessions. It supports generating and verifying session's tokens. It also supports revoking and listing user sessions.

You need to implement TokenStore interface for storing session's tokens. You can store tokens in any SQL database, document database, or key-value store.

The token consists of two parts (secure random 16 bytes both): identifier and verifier divided by dot:

e331f62186318b18cdfa8be66b87ef5e.f2a4e2278609e1b59e529267d59187cb

Server sends this token to the client to store and use for subsequent requests.

Client sends this token back for verifying.

Example:

expirationPolicy := &session.ExpirationPolicy {
    Amount: 30,
    Unit: time.Duration(time.Hour * 24)
}
manager := session.NewManager(store, expirationPolicy)

token, err := manager.Generate("userId", "some-details")
if err != nil {
	fmt.Errorf("Unable to generate token %q", token)
}
valid, err := manager.Verify(token) // true
if err != nil {
	fmt.Errorf("Unable to verify token %q", token)
}
list, err := manager.List("userId") // list.size == 1
if err != nil {
	fmt.Errorf("User %q has no sessions", token)
}
err := manager.Revoke("identifier") // list.size == 0
if err != nil {
	fmt.ErrorF("Can't revoke session")
}

The library has no external dependencies.