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node.jsexpressexpress-session

Difference between req.sessionID and req.session.id in express-session

Can someone explain me the difference between req.sessionID and req.session.id with an example? In a request shouldn't they be same always?

Solution

  • There is none. Use the source.

    Excerpt of the relevant constructor function:

    function Session(req, data) {
  Object.defineProperty(this, 'req', { value: req });
  Object.defineProperty(this, 'id', { value: req.sessionID });

  // ...
}

    The reason why there are two ways to get the session ID is either "for convenience" or "for backward compatibility" – very probably both.