83 lines
2.1 KiB
JavaScript
83 lines
2.1 KiB
JavaScript
/**
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* Module dependencies.
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*/
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var pause = require('pause')
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, util = require('util')
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, Strategy = require('passport-strategy');
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/**
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* `SessionStrategy` constructor.
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*
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* @api public
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*/
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function SessionStrategy(options, deserializeUser) {
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if (typeof options == 'function') {
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deserializeUser = options;
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options = undefined;
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}
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options = options || {};
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Strategy.call(this);
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this.name = 'session';
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this._key = options.key || 'passport';
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this._deserializeUser = deserializeUser;
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}
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/**
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* Inherit from `Strategy`.
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*/
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util.inherits(SessionStrategy, Strategy);
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/**
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* Authenticate request based on the current session state.
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*
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* The session authentication strategy uses the session to restore any login
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* state across requests. If a login session has been established, `req.user`
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* will be populated with the current user.
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*
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* This strategy is registered automatically by Passport.
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*
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* @param {Object} req
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* @param {Object} options
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* @api protected
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*/
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SessionStrategy.prototype.authenticate = function(req, options) {
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if (!req.session) { return this.error(new Error('Login sessions require session support. Did you forget to use `express-session` middleware?')); }
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options = options || {};
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var self = this,
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su;
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if (req.session[this._key]) {
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su = req.session[this._key].user;
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}
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if (su || su === 0) {
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// NOTE: Stream pausing is desirable in the case where later middleware is
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// listening for events emitted from request. For discussion on the
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// matter, refer to: https://github.com/jaredhanson/passport/pull/106
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var paused = options.pauseStream ? pause(req) : null;
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this._deserializeUser(su, req, function(err, user) {
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if (err) { return self.error(err); }
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if (!user) {
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delete req.session[self._key].user;
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} else {
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var property = req._userProperty || 'user';
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req[property] = user;
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}
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self.pass();
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if (paused) {
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paused.resume();
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}
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});
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} else {
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self.pass();
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}
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};
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/**
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* Expose `SessionStrategy`.
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*/
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module.exports = SessionStrategy;
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