node.js - 设置 connect-flash 中间件以供 passport 使用

Question

我想访问我的 Passport 策略在其回调中指定的消息，如下所示:done(null, false, { message: 'No such user.' });。到目前为止，我发现可以通过将选项 failureFlash: true 传递到 passport.authenticate() 函数中来显示这些消息，再次使用该函数需要 connect-flash 要安装的中间件。所以我安装了模块并将 var flash = require('connect-flash); 添加到我的源代码中，并将 app.use(flash()); 添加到我的 express 应用程序的配置方法。但它仍然因方法 .flash() 不可用的错误而崩溃。我错过了什么？

更多代码:

var http = require('http');
var express = require('express');
var passport = require('passport');
var googleStrategy = require('passport-google').Strategy;
var flash = require('connect-flash');

passport.serializeUser(function (user, done) {
    done(null, user);
});

passport.deserializeUser(function (obj, done) {
    done(null, obj);
});

passport.use(new googleStrategy(
    { 
        returnURL: 'http://localhost:123456/auth/google/return', 
        realm: 'http://localhost:123456/' 
    },
    function(identifier, profile, done) {
        process.nextTick(function () {
            User.findOne({ ID: identifier }, function (err, user) {
                if (err) {
                    return done(err);
                }

                if (!user) {
                    return done(null, false, { message: 'no such user' });
                }

                return done(null, user);
            });
        });
    })
);

var app = express();

app.configure(function() {
    app.set('view engine', 'ejs');
    app.set('views', __dirname + '/views');
    app.use(express.logger());
    app.use(express.cookieParser());
    app.use(express.bodyParser());
    app.use(express.methodOverride());
    app.use(express.session({ secret: 'veryverysecretsecret' }));
    app.use(passport.initialize());
    app.use(passport.session());
    app.use(app.router);
    app.use(flash());
});

app.get(
    '/auth/google',
    passport.authenticate('google', { failureRedirect: '/login', failureFlash: true }),
    function (req, res) {
        res.redirect('/');
    }
);

app.get('/auth/google/return',
    passport.authenticate('google', { failureRedirect: '/login', failureFlash: true }),
    function (req, res) {
        res.redirect('/');
    }
);

http.createServer(app).listen(123456);

Answer 1

Passport 需要先配置 flash。

要解决您的问题，只需更改 app.configure() 中的顺序，并将 passport use 移到它下面，如下所示:

app.configure(function() {
    app.set('view engine', 'ejs');
    app.set('views', __dirname + '/views');
    app.use(express.logger());
    app.use(express.cookieParser());
    app.use(express.bodyParser());
    app.use(express.methodOverride());
    app.use(express.session({ secret: 'veryverysecretsecret' }));
    app.use(flash());
    app.use(passport.initialize());
    app.use(passport.session());
    app.use(app.router);
});

passport.serializeUser(function (user, done) {
    done(null, user);
});

passport.deserializeUser(function (obj, done) {
    done(null, obj);
});

passport.use(new googleStrategy(
    { 
        returnURL: 'http://localhost:123456/auth/google/return', 
        realm: 'http://localhost:123456/' 
    },
    function(identifier, profile, done) {
        process.nextTick(function () {
            User.findOne({ ID: identifier }, function (err, user) {
                if (err) {
                    return done(err);
                }

                if (!user) {
                    return done(null, false, { message: 'no such user' });
                }

                return done(null, user);
            });
        });
    })
);

很高兴对您有所帮助!