将标头发送到客户端后无法设置标头 [英] Cannot set headers after they are sent to the client
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问题描述
在将标头发送到客户端后无法设置标头。这是验证请求后的后端错误，看起来像
标头的问题。很抱歉，我的项目代码很脏，我还需要做其他事情，因此注释中有一些代码。
这是我的代码
Cannot set headers after they are sent to the client. This is my back-end side error after authentication post request.It looks like problem with headers. I'm sorry for my dirty code for my project i need to do something else,so there some code in comment. This is my code
const express = require("express");
const router = express.Router();
const Spec = require("../models/specialist");
const jwt = require("jsonwebtoken");
const config = require("../config/data");
const passport = require('passport');
const LocalStrategy = require('passport-local').Strategy;
router.get("/login",(req,res)=>{
res.render("login");
});
router.get("/signup",(req,res)=>{
res.render("signup");
});
//Registration route
router.post("/spec/register",(req,res)=>{
let date=new Date();
let newUser = new Spec({
name:req.body.spec_name,
email_num:req.body.spec_email,
password:req.body.spec_password,
role:"User",
isActive:true,
created:date,
updatedToken:"JWT"
});
Spec.addUser(newUser,(err,user)=>{
if(err){
console.log("err");
} else {
res.header("Content-Type","application/json");
// res.redirect("/users/login");
}
});
});
// passport.use(new LocalStrategy(
// function(username, password, done) {
// Spec.getUser(username, function(err, user){
// if(err) return console.error(err.stack);
// if(!user){
// return done(null, false, {message: 'Unknown User'});
// }
// Spec.comparePassword(password, user.password, function(err, isMatch){
// if(err) return console.error(err.stack);
// if(isMatch){
// return done(null, user);
// } else {
// return done(null, false, {message: 'Invalid password'});
// }
// });
// });
// }));
// passport.serializeUser(function(user, done) {
// done(null, user.id);
// });
// passport.deserializeUser(function(id, done) {
// User.getUserById(id, function(err, user) {
// done(err, user);
// });
// });
//Authentication route
router.post('/spec/authenticate', (req, res,next) => {
const email = req.body.email;
const password = req.body.password;
Spec.getUser(email, (err, user) => {
if(err) throw err;
if(!user){
return res.json({success: false, msg: 'User not found'});
}
Spec.comparePassword(password, user.password, (err, isMatch) => {
if(err) throw err;
if(isMatch){
let payload={
name:user.name,
email:user.email_num,
role:user.role,
deleted:user.deleted,
isActive:user.isActive,
created:user.created
};
let token = jwt.sign(payload,config.JWT_SECRET,{
expiresIn:1440
})
Spec.saveToken(email,token,(err,success)=>{
if(err) return err;
console.log("Success");
// res.setHeader('Authorization','bearer '+token );
res.cookie('Authorization','bearer '+token);
res.json ({ success: true, token: 'bearer ' + token });
res.redirect("/users/user");
});
} else {
return res.json({success: false, msg: 'Wrong password'});
}
});
});
// res.redirect("/user");
});
router.get("/user",passport.authenticate('jwt',{session:false}), (req,res)=>{
res.render("user");
});
router.get("/forgotPass",(req,res)=>{
res.render("forgotPass");
});
router.get("/we",(req,res)=>{
res.render("we");
});
module.exports = router;
您可以在我的代码中发现其他错误，因为我尝试了许多不同的方法。这是passport.js配置文件
You can find other mistakes in my code,because ive tried many different ways.Here is passport.js config file
const JwtStrategy = require('passport-jwt').Strategy,
ExtractJwt = require('passport-jwt').ExtractJwt;
const config = require("./data");
const mongoose = require("mongoose");
const User = require("../models/specialist");
module.exports = function(passport){
let cookieExtractor = function(req) {
var token = null;
if (req && req.cookies)
{
token = req.cookies['Authorization'];
}
return token;
};
let opts = {}
opts.jwtFromRequest = cookieExtractor;
opts.secretOrKey = config.JWT_SECRET;
passport.use(new JwtStrategy(opts, function(jwt_payload, done) {
User.findOne({name:jwt_payload._doc.name}, function(err, user) {
if (err) {
console.log(err);
return done(err, false);
}
if (user) {
console.log("OK 200");
return done(null, user);
} else {
console.log("no user");
return done(null, false);
// or you could create a new account
}
});
}));
}
// // Google OAuth Strategy
// passport.use('googleToken', new GooglePlusTokenStrategy({
// clientID: config.oauth.google.clientID,
// clientSecret: config.oauth.google.clientSecret
// }, async (accessToken, refreshToken, profile, done) => {
// try {
// // Should have full user profile over here
// console.log('profile', profile);
// console.log('accessToken', accessToken);
// console.log('refreshToken', refreshToken);
// const existingUser = await User.findOne({ "google.id": profile.id });
// if (existingUser) {
// return done(null, existingUser);
// }
// const newUser = new User({
// method: 'google',
// google: {
// id: profile.id,
// email: profile.emails[0].value
// }
// });
// await newUser.save();
// done(null, newUser);
// } catch(error) {
// done(error, false, error.message);
// }
// }));
// passport.use('facebookToken', new FacebookTokenStrategy({
// clientID: config.oauth.facebook.clientID,
// clientSecret: config.oauth.facebook.clientSecret
// }, async (accessToken, refreshToken, profile, done) => {
// try {
// console.log('profile', profile);
// console.log('accessToken', accessToken);
// console.log('refreshToken', refreshToken);
// const existingUser = await User.findOne({ "facebook.id": profile.id });
// if (existingUser) {
// return done(null, existingUser);
// }
// const newUser = new User({
// method: 'facebook',
// facebook: {
// id: profile.id,
// email: profile.emails[0].value
// }
// });
// await newUser.save();
// done(null, newUser);
// } catch(error) {
// done(error, false, error.message);
// }
// }));
// LOCAL STRATEGY
// module.exports = function(passport){
// passport.use(new LocalStrategy(
// function(username, password, done) {
// Spec.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);
// });
// }
// ));
// }
这是对身份验证的ajax请求
And this is ajax request for authentication
$('.logInForm').on('submit', function (e) {
$.ajax({
type: 'post',
url: 'http://localhost:3000/users/spec/authenticate',
data: $(this).serialize(),
success:function(data){
console.log(data);
localStorage.setItem("authToken",data.token);
}
}).done(function(data){
if(data.token){
location.href="http://localhost:3000/users/user";
}else{
console.log("err");
}
});
e.preventDefault();
});
非常感谢。
推荐答案
这是由于您的代码试图从身份验证功能发送多个响应。
This is due to your code trying to send multiple responses from the authenticate function.
res.json ({ success: true, token: 'bearer ' + token }); // 1st Response
res.redirect("/users/user"); // 2nd Response
删除其中一个不使用的内容。
Remove one of them which you don't use.
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