Javascript Express和Passport错误：身份验证策略未知“；“登录”；

我目前正在运行一个在线教程中的简单测试平均值堆栈，利用：

• Node.js
• Express.js
• Passport.js

以下是应用程序文件：

app.js

var express = require("express");
var mongoose = require("mongoose");
var path = require("path");
var bodyParser = require("body-parser");
var cookieParser = require("cookie-parser");
var session = require("express-session");
var flash = require("connect-flash");
var ejs = require("ejs");

var routes = require("./routes");

var app = express();

mongoose.connect("mongodb://localhost:27017/testdb");

app.set("port", process.env.PORT || 3000);

app.set("views", path.join(__dirname, "views"));
app.set("view engine", "ejs");

app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(session({
    secret: "secret",
    resave: true,
    saveUninitialized: true
}));

app.use(flash());

app.use(routes);

app.listen(app.get("port"), function() {
    console.log("MEAN social media server started on port " + app.get("port"));
});

var express = require("express");
var passport = require("passport");

var User = require("./models/user");

var router = express.Router();

router.use(function(req, res, next) {
    res.locals.currentUser = req.user;
    res.locals.errors = req.flash("error");
    res.locals.infos = req.flash("info");
    next();
});

router.get("/", function(req, res,next) {
    User.find()
        .sort({ createdAt: "descending" })
        .exec(function(err, users) {
            if (err) {
                return next(err);
            }
            res.render("index", { users: users });
        });
});

router.get("/signup", function(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("login", {
    successRedirect: "/",
    failureRedirect: "/signup",
    failureFlash: true
}));

router.get("/users/:username", function(req, res, next) {
    User.findOne({ username: req.params.username }, function(err, user) {
        if (err) {
            return next(err);
        }
        if (!user) {
            return next(404);
        }
        res.render("profile", {
            user: user
        });
    });
});

module.exports = router;

<% include _header %>

<h1>Sign up</h1>

<form action="/signup" method="post">
    <input name="username" type="text" class="form-control"     placeholder="Username" required autofocus>
    <input name="password" type="password" class="form-control" placeholder="Password" required>
    <input type="submit" value="Sign up" class="btn btn-primary btn-block">
</form>

<% include _footer %>

虽然此app.js文件中有视图，但此处的集中度是针对routes变量所需的路由：

routes.js

var express = require("express");
var mongoose = require("mongoose");
var path = require("path");
var bodyParser = require("body-parser");
var cookieParser = require("cookie-parser");
var session = require("express-session");
var flash = require("connect-flash");
var ejs = require("ejs");

var routes = require("./routes");

var app = express();

mongoose.connect("mongodb://localhost:27017/testdb");

app.set("port", process.env.PORT || 3000);

app.set("views", path.join(__dirname, "views"));
app.set("view engine", "ejs");

app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(session({
    secret: "secret",
    resave: true,
    saveUninitialized: true
}));

app.use(flash());

app.use(routes);

app.listen(app.get("port"), function() {
    console.log("MEAN social media server started on port " + app.get("port"));
});

var express = require("express");
var passport = require("passport");

var User = require("./models/user");

var router = express.Router();

router.use(function(req, res, next) {
    res.locals.currentUser = req.user;
    res.locals.errors = req.flash("error");
    res.locals.infos = req.flash("info");
    next();
});

router.get("/", function(req, res,next) {
    User.find()
        .sort({ createdAt: "descending" })
        .exec(function(err, users) {
            if (err) {
                return next(err);
            }
            res.render("index", { users: users });
        });
});

router.get("/signup", function(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("login", {
    successRedirect: "/",
    failureRedirect: "/signup",
    failureFlash: true
}));

router.get("/users/:username", function(req, res, next) {
    User.findOne({ username: req.params.username }, function(err, user) {
        if (err) {
            return next(err);
        }
        if (!user) {
            return next(404);
        }
        res.render("profile", {
            user: user
        });
    });
});

module.exports = router;

<% include _header %>

<h1>Sign up</h1>

<form action="/signup" method="post">
    <input name="username" type="text" class="form-control"     placeholder="Username" required autofocus>
    <input name="password" type="password" class="form-control" placeholder="Password" required>
    <input type="submit" value="Sign up" class="btn btn-primary btn-block">
</form>

<% include _footer %>

以下是views/signup.ejs文件：

查看/注册.ejs

var express = require("express");
var mongoose = require("mongoose");
var path = require("path");
var bodyParser = require("body-parser");
var cookieParser = require("cookie-parser");
var session = require("express-session");
var flash = require("connect-flash");
var ejs = require("ejs");

var routes = require("./routes");

var app = express();

mongoose.connect("mongodb://localhost:27017/testdb");

app.set("port", process.env.PORT || 3000);

app.set("views", path.join(__dirname, "views"));
app.set("view engine", "ejs");

app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(session({
    secret: "secret",
    resave: true,
    saveUninitialized: true
}));

app.use(flash());

app.use(routes);

app.listen(app.get("port"), function() {
    console.log("MEAN social media server started on port " + app.get("port"));
});

var express = require("express");
var passport = require("passport");

var User = require("./models/user");

var router = express.Router();

router.use(function(req, res, next) {
    res.locals.currentUser = req.user;
    res.locals.errors = req.flash("error");
    res.locals.infos = req.flash("info");
    next();
});

router.get("/", function(req, res,next) {
    User.find()
        .sort({ createdAt: "descending" })
        .exec(function(err, users) {
            if (err) {
                return next(err);
            }
            res.render("index", { users: users });
        });
});

router.get("/signup", function(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("login", {
    successRedirect: "/",
    failureRedirect: "/signup",
    failureFlash: true
}));

router.get("/users/:username", function(req, res, next) {
    User.findOne({ username: req.params.username }, function(err, user) {
        if (err) {
            return next(err);
        }
        if (!user) {
            return next(404);
        }
        res.render("profile", {
            user: user
        });
    });
});

module.exports = router;

<% include _header %>

<h1>Sign up</h1>

<form action="/signup" method="post">
    <input name="username" type="text" class="form-control"     placeholder="Username" required autofocus>
    <input name="password" type="password" class="form-control" placeholder="Password" required>
    <input type="submit" value="Sign up" class="btn btn-primary btn-block">
</form>

<% include _footer %>

注册

单击视图/signup.ejs文件上的提交按钮时，“用户”记录确实会提交到MongoDB数据库，但是插入后“/signup”post方法会出现以下错误：

localhost:3000/注册（POST）

错误：未知的身份验证策略“登录”
尝试时（//node_modules/passport/lib/middleware/authenticate.js:166:37）
在authenticate（//node_modules/passport/lib/middleware/authenticate.js:342:7）
在Layer.handle[作为handle\u请求]（//node\u modules/express/lib/router/Layer.js:95:5）
下一步（//node_modules/express/lib/router/route.js:131:13）
在模型上。（//node_modules/mongoose/lib/document.js:1731:20）
下一步（//node_modules/hooks fixed/hooks.js:89:34）
在fnWrapper（//node_modules/hooks fixed/hooks.js:186:18）
在//node_modules/mongoose/lib/model.js:295:13
在//node_modules/mongoose/lib/model.js:230:5
在//node_modules/mongoose/lib/model.js:139:7
位于//node_modules/mongoose/node_modules/mongodb/lib/collection.js:479:5
位于//node_modules/mongoose/node_modules/mongodb/lib/collection.js:633:5
位于//node_modules/mongoose/node_modules/mongodb/lib/bulk/unordered.js:469:9
在resultHandler（//node_modules/mongoose/node_modules/mongodb/lib/bulk/unordered.js:416:5）
位于//node_modules/mongoose/node_modules/mongodb core/lib/topologies/server.js:778:13
在Callbacks.emit（//node_modules/mongoose/node_modules/mongodb core/lib/topologies/server.js:95:3）

我注意到，routes.js文件中的passport.authenticate函数没有对登录事件的引用

---

如果有人收到类似的“错误：未知身份验证策略”“登录”“错误”？

我会选择删除这个问题，但因为我真诚地熬夜来解决这个问题，我至少应该发布错误是什么

在构建此应用程序时，创建了以下视图：

• index.ejs
• signup.ejs

如果您查看上面的routes.js文件，当某人发布注册表单（router.post（“/signup”）时，passport.authenticate将发送用户自动注册“login”视图并将用户发送到根端点

被调用的“登录”状态不存在导致错误，因此出现以下消息：

错误：未知身份验证策略“登录”错误

---

谢谢大家的帮助。

在router.js中

newUser.save（next）；}；}，passport.authenticate（“login”），

你确定你可以这样做吗？我的意思是，在

router.post（）

？你正在做

router.post（'/'，function（），function（））

你的passport设置在哪里？@Diego这里的问题是我没有创建“login”面（或视图）.@robertklep问题似乎是“登录”视图不可用。请参阅下面的答案。Passport对视图不感兴趣。您所犯的错误与您如何向Passport注册策略有关，我猜您也解决了这个问题。@robertklep从技术上讲，在发布问题报告时，我没有策略（后来，我要求使用“passport local”），所以这是绝对正确的。在实现了passport.use（“登录”）功能之后，它确实起了作用。感谢您的澄清。