幾天前在這里提出了一個問題，以為我已經弄清楚了，甚至接受了答案，因為無論如何它都是對的。但現在我有同樣的問題，同樣的錯誤。
這是錯誤。
Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client
at ServerResponse.setHeader (_http_outgoing.js:558:11)
at ServerResponse.header (/Users/apple/Documents/Web Dev/collab/Backend/node_modules/express/lib/response.js:771:10)
at ServerResponse.send (/Users/apple/Documents/Web Dev/collab/Backend/node_modules/express/lib/response.js:170:12)
at ServerResponse.json (/Users/apple/Documents/Web Dev/collab/Backend/node_modules/express/lib/response.js:267:15)
at /Users/apple/Documents/Web Dev/collab/Backend/routes/index.js:90:23
at processTicksAndRejections (internal/process/task_queues.js:93:5) {
code: 'ERR_HTTP_HEADERS_SENT'
}
這里是 Index.js。第 90 行在最底部，@ router.get("/", isAuth, (req, res)
const router = require("express").Router();
const passport = require("passport");
const bodyParser = require("body-parser");
const genPassword = require("../lib/passwordUtils").genPassword;
const connection = require("../config/database");
const mongoose = require("mongoose");
const User = mongoose.models.User;
const isAuth = require("./authMiddleware").isAuth;
// cors is needed with router.use else you have to put routes on the app.js
const cors = require("cors");
router.use(cors({ origin: "http://localhost:3001", credentials: true }));
// const isAdmin = require("./authMiddleware").isAdmin;
router.use(bodyParser.urlencoded({ extended: false }));
/**
* -------------- Post ROUTES ----------------
*
*/
router.post("/login", (req, res, next) => {
passport.authenticate("local", (err, user, info) => {
if (err) {
throw err;
} else if (!user) {
res.send("No User Exists");
} else {
req.logIn(user, (err) => {
if (err) throw err;
res.send(user);
return;
// console.log(req.user);
});
}
})(req, res, next);
});
router.post("/register", (req, res) => {
const saltHash = genPassword(req.body.repeatPassword);
const salt = saltHash.salt;
const hash = saltHash.hash;
const newUser = new User({
username: req.body.firstInput,
fName: "",
lName: "",
title: "",
hash: hash,
salt: salt,
});
newUser.save().then((user) => {});
res.sendStatus(200);
});
/**
* -------------- GET ROUTES ----------------
*
*/
router.post("/user", (req, res) => {
const fName = req.body.firstInput;
const lName = req.body.secondInput;
const title = req.body.repeatPassword;
const user = req.session.passport.user;
User.updateOne(
{ _id: user },
{ fName: fName, lName: lName, title: title },
function (err, result) {
if (err) {
res.sendStatus(401);
console.log(err);
} else {
res.sendStatus(200);
}
}
);
});
router.get("/", isAuth, (req, res) => {
const userMap = {};
User.find({}, function (err, users) {
users.forEach(function (user) {
userMap[user._id] = user;
});
return userMap;
})
.then((response) => {
res.status(200).json({ user: req.user, auth: true, response });
return;
})
.catch((err) => console.log(err));
});
module.exports = router;
這里是 App.js
const express = require("express");
const app = express();
const mongoose = require("mongoose");
const session = require("express-session");
const passport = require("passport");
const crypto = require("crypto");
const routes = require("./routes");
const isAuth = require("./routes/authMiddleware").isAuth;
const connection = require("./config/database");
const cors = require("cors");
app.use(cors({ origin: "http://localhost:3001", credentials: true }));
const User = mongoose.models.User;
const bodyParser = require("body-parser");
const MongoStore = require("connect-mongo")(session);
require("dotenv").config();
app.use(express.json());
// app.use(bodyParser.urlencoded({ extended: false }));
app.use(express.urlencoded({ extended: true }));
const sessionStore = new MongoStore({
mongooseConnection: mongoose.connection,
collection: "sessions",
});
app.use(
session({
secret: "zdfbdaf",
resave: true,
saveUninitialized: true,
store: sessionStore,
cookie: {
cookie: { secure: false },
maxAge: 1000 * 60 * 60 * 24,
},
})
);
require("./config/passport");
app.use(passport.initialize());
app.use(passport.session());
app.use("/", routes);
app.listen(3000);
這里是 authMiddleware.js
module.exports.isAuth = (req, res, next) => {
if (req.isAuthenticated()) {
next();
// res.status(200).json({ user: req.user, auth: true });
} else {
res.status(401).json({ auth: false });
}
};
// module.exports.isAdmin = (req, res, next) => {
// if (req.isAuthenticated() && req.user.admin) {
// next();
// } else {
// res.status(401).json({ msg: 'You are not authorized to view this resource because you are not an admin.' });
// }
// }
這里是passport.js
const passport = require("passport");
const LocalStrategy = require("passport-local").Strategy;
const connection = require("./database");
const mongoose = require("mongoose");
const User = mongoose.models.User;
const validPassword = require("../lib/passwordUtils").validPassword;
const cors = require("cors");
passport.use(cors({ origin: "http://localhost:3001" }));
const customFields = {
usernameField: "username",
passwordField: "password",
};
passport.use(
new LocalStrategy(customFields, (username, password, done) => {
User.findOne({ username: username })
.then((user) => {
if (!user) {
console.log("No user");
return done(null, false);
} else {
const isValid = validPassword(password, user.hash, user.salt);
if (isValid) {
console.log("Logged in");
return done(null, user);
} else {
console.log("Wrong Password");
return done(null, true);
}
}
})
.catch((err) => {
done(err);
});
})
);
passport.serializeUser((user, done) => {
done(null, user.id);
});
passport.deserializeUser((id, done) => {
User.findById(id, (err, user) => {
done(err, user);
})
.then((user) => {
done(null, user);
})
.catch((err) => done(err));
});
它只崩潰了一半，怎么樣？它首先起作用，直到您重繪 頁面。我很茫然。有人在不和諧中也不知道這個問題。我在這里乞求一些幫助。我正在失去理智。
uj5u.com熱心網友回復：
這是因為您在找到用戶后呼叫 done 兩次，第二次呼叫了 .then 塊中的 Passport.deserializeUser 函式
這將起作用：
passport.deserializeUser((id, done) => {
User.findById(id, (err, user) => {
done(err, user)
});
});
轉載請註明出處，本文鏈接：https://www.uj5u.com/houduan/359510.html