有人可以告诉我为什么我似乎无法通过这里的登录页面？
app.configure(function() {
this.engine('ejs', require('ejs-locals'));
this.set('views', path.join(__dirname, 'views'));
this.set('view engine', 'ejs');
this.use(express.static(path.join(__dirname, '/public')));
this.use(express.static(path.join(__dirname, '/views/login')));
this.use(express.static(path.join(__dirname, '/views/el')));
// Allow parsing cookies from request headers
this.use(express.cookieParser());
this.use(express.session({
"secret": sessionSecret,
"store": sessionStore
}));
// Allow parsing form data
this.use(express.bodyParser());
});
app.configure('development', function() {
this.use(express.errorHandler({
dumpExceptions: true,
showStack: true
}));
});
app.configure('production', function() {
this.use(express.errorHandler());
});
function authenticate(name, password, fn) {
if (!module.parent) console.log('authenticating %s:%s', name, password);
User.findOne({
username: name
},
function(err, user) {
if (user) {
if (err) return fn(new Error('cannot find user'));
hash(password, user.salt, function(err, hash) {
if (err) return fn(err);
if (hash == user.hash) return fn(null, user);
fn(new Error('invalid password'));
});
} else {
return fn(new Error('cannot find user'));
}
});
}
function requiredAuthentication(req, res, next) {
if (req.session.user) {
next();
} else {
req.session.error = 'Access denied!';
res.redirect('/login');
}
}
function userExist(req, res, next) {
User.count({
username: req.body.username
}, function(err, count) {
if (count === 0) {
next();
} else {
req.session.error = "User Exists"
res.redirect("/signup");
}
});
}
//Routes
app.get("/", function(req, res) {
if (req.session.user) {
res.send("Welcome " + req.session.user.username + "<br>" + "<a href='/logout'>logout</a>");
} else {
res.render("./login/login");
}
});
app.get("/signup", function(req, res) {
if (req.session.user) {
res.redirect("/");
} else {
res.render("./login/Signup");
}
});
app.post("/signup", userExist, function(req, res) {
var password = req.body.password;
var username = req.body.username;
hash(pass, function(err, salt, hash) {
if (err) throw err;
var user = new User({
username: username,
salt: salt,
hash: hash,
}).save(function(err, newUser) {
if (err) throw err;
authenticate(newUser.username, password, function(err, user) {
if (user) {
req.session.regenerate(function() {
req.session.user = user;
req.session.success = 'Authenticated as ' + user.username + ' click to <a href="/logout">logout</a>. ' + ' You may now access <a href="/">/</a>.';
res.redirect('/');
});
}
});
});
});
});
app.get("/login", function(req, res) {
res.render("./login/login");
});
app.post("/login", function(req, res) {
authenticate(req.body.username, req.body.password, function(err, user) {
if (user) {
req.session.regenerate(function() {
req.session.user = user;
req.session.success = 'Authenticated as ' + user.username + ' click to <a href="/logout">logout</a>. ' + ' You may now access <a href="/restricted">/restricted</a>.';
res.redirect('/');
});
} else {
req.session.error = 'Authentication failed, please check your ' + ' username and password.';
res.redirect('/login');
}
});
});
app.get('/logout', function(req, res) {
req.session.destroy(function() {
res.redirect('/');
});
});
app.get('/profile', requiredAuthentication, function(req, res) {
res.send('Profile page of ' + req.session.user.username + '<br>' + ' click to <a href="/logout">logout</a>');
});
当我用node编译我的server.js文件并转到localhost时，会出现登录页面。当我输入我已插入Mongo DB的用户名和密码时，收到以下消息：
Unable to connect
Firefox can't establish a connection to the server at localhost.
The site could be temporarily unavailable or too busy. Try again in a few moments.
If you are unable to load any pages, check your computer's network connection.
If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the Web.
我的Node提示符显示以下内容：
/home/ghanem/server/www/server.js:210
hash(password, user.salt, function (err, hash) {
^ TypeError: string is not a function
at /home/ghanem/server/www/server.js:210:12
at /home/ghanem/server/www/node_modules/mongoose/lib/query.js:1170:16
at /home/ghanem/server/www/node_modules/mongoose/node_modules/kareem/index.js:103:16
at process._tickCallback (node.js:415:13)