oauth2-proxy/oauth2-proxy

package sessions

import (
    "context"
    "errors"
    "net/http"
    "time"
)

// SessionStore is an interface to storing user sessions in the proxy
type SessionStore interface {
    Save(rw http.ResponseWriter, req *http.Request, s *SessionState) error
    Load(req *http.Request) (*SessionState, error)
    Clear(rw http.ResponseWriter, req *http.Request) error
    VerifyConnection(ctx context.Context) error
}

var ErrLockNotObtained = errors.New("lock: not obtained")
var ErrNotLocked = errors.New("tried to release not existing lock")

// Lock is an interface for controlling session locks
type Lock interface {
    // Obtain obtains the lock on the distributed
    // lock resource if no lock exists yet.
    // Otherwise it will return ErrLockNotObtained
    Obtain(ctx context.Context, expiration time.Duration) error
    // Peek returns true if the lock currently exists
    // Otherwise it returns false.
    Peek(ctx context.Context) (bool, error)
    // Refresh refreshes the expiration time of the lock,
    // if is still applied.
    // Otherwise it will return ErrNotLocked
    Refresh(ctx context.Context, expiration time.Duration) error
    // Release removes the existing lock,
    // Otherwise it will return ErrNotLocked
    Release(ctx context.Context) error
}