Question

我试图在快递应用程序中使用护照身份验证。

router.get('/signup', (req ,res) => {
  res.render('signup');
});

router.post('/signup', function(req, res, next) {
  var username = req.body.username;
  var password = req.body.password;

  User.findOne({ username: username }, function(err, user) {

    if(err) { return next(err); }
    if(user) {
      req.flash('error', 'User already exists');
      return res.redirect('/signup');
    }

    var newUser = new User({
      username: username,
      password: password
    });
    newUser.save(next);
  });
}, passport.authenticate('local', {
  successRedirect: '/',
  failureRedirect: '/signup',
  failureFlash: true
}));

每当我尝试注册测试用户时，它都有效，但它会显示如下错误：

Error: Unknown authentication strategy "local"

你能告诉我一件事。

Answer 1

看起来您尚未设置Passport以使用您的护照本地策略。您需要导入它，实例化它，然后指示Passport使用它。这是一个例子：

var LocalStrategy = require('passport-local').Strategy;

passport.use(new LocalStrategy(
  function(username, password, done) {
    User.findOne({ username: username }, function (err, user) {
      if (err) { return done(err); }
      if (!user) { return done(null, false); }
      if (!user.verifyPassword(password)) { return done(null, false); }
      return done(null, user);
    });
  }
));

router.post('/signup', function(req, res, next) {
  var username = req.body.username;
  var password = req.body.password;

  User.findOne({ username: username }, function(err, user) {

    if(err) { return next(err); }
    if(user) {
      req.flash('error', 'User already exists');
      return res.redirect('/signup');
    }

    var newUser = new User({
      username: username,
      password: password
    });
    newUser.save(next);

    passport.authenticate('local', { failureRedirect: '/signup' }),
     function(req, res) {
      res.redirect('/');
    });
  });
});

请阅读该插件的文档here。此外，here's an example app使用该身份验证策略。

Answer 2

尝试在本地之后使用回调函数而不是传递对象。像这样：

    router.post("/register", function(req, res){
      var newUser = new User({username: req.body.username});
      User.register(newUser, req.body.password, function(err, user){
          if(err){
              req.flash("error", err.message); //such as the username is taken or no username entered etc.
              res.redirect("/register");
          } else {
            passport.authenticate("local")(req, res, function(){
                res.redirect("/");
              });
            }
        });
    });

错误：未知的身份验证策略＆＃34; local＆＃34; （快递和护照）

2 个答案: