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120 lines
3.2 KiB
JavaScript
120 lines
3.2 KiB
JavaScript
/**
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* Module dependencies.
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*/
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const passport = require('passport-strategy')
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const util = require('util')
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function lookup(obj, field) {
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if (!obj) { return null; }
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var chain = field.split(']').join('').split('[');
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for (var i = 0, len = chain.length; i < len; i++) {
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var prop = obj[chain[i]];
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if (typeof (prop) === 'undefined') { return null; }
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if (typeof (prop) !== 'object') { return prop; }
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obj = prop;
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}
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return null;
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}
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/**
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* `Strategy` constructor.
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*
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* The local authentication strategy authenticates requests based on the
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* credentials submitted through an HTML-based login form.
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*
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* Applications must supply a `verify` callback which accepts `username` and
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* `password` credentials, and then calls the `done` callback supplying a
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* `user`, which should be set to `false` if the credentials are not valid.
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* If an exception occured, `err` should be set.
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*
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* Optionally, `options` can be used to change the fields in which the
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* credentials are found.
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*
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* Options:
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* - `usernameField` field name where the username is found, defaults to _username_
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* - `passwordField` field name where the password is found, defaults to _password_
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* - `passReqToCallback` when `true`, `req` is the first argument to the verify callback (default: `false`)
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*
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* Examples:
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*
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* passport.use(new LocalStrategy(
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* function(username, password, done) {
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* User.findOne({ username: username, password: password }, function (err, user) {
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* done(err, user);
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* });
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* }
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* ));
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*
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* @param {Object} options
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* @param {Function} verify
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* @api public
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*/
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function Strategy(options, verify) {
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if (typeof options == 'function') {
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verify = options;
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options = {};
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}
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if (!verify) { throw new TypeError('LocalStrategy requires a verify callback'); }
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this._usernameField = options.usernameField || 'username';
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this._passwordField = options.passwordField || 'password';
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passport.Strategy.call(this);
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this.name = 'local';
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this._verify = verify;
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this._passReqToCallback = options.passReqToCallback;
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}
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/**
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* Inherit from `passport.Strategy`.
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*/
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util.inherits(Strategy, passport.Strategy);
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/**
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* Authenticate request based on the contents of a form submission.
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*
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* @param {Object} req
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* @api protected
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*/
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Strategy.prototype.authenticate = function (req, options) {
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options = options || {};
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var username = lookup(req.body, this._usernameField)
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if (username === null) {
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lookup(req.query, this._usernameField);
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}
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var password = lookup(req.body, this._passwordField)
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if (password === null) {
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password = lookup(req.query, this._passwordField);
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}
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if (username === null || password === null) {
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return this.fail({ message: options.badRequestMessage || 'Missing credentials' }, 400);
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}
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var self = this;
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function verified(err, user, info) {
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if (err) { return self.error(err); }
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if (!user) { return self.fail(info); }
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self.success(user, info);
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}
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try {
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if (self._passReqToCallback) {
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this._verify(req, username, password, verified);
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} else {
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this._verify(username, password, verified);
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}
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} catch (ex) {
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return self.error(ex);
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}
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};
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/**
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* Expose `Strategy`.
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*/
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module.exports = Strategy;
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