确实，问题是在几次我以页面开始的会话进行导航之后开始的，并且在我将它们从会话中删除cookie之前，发送给我的错误无法显示标头。 我已经有几天遇到此错误了，到目前为止我还不知道出什么问题了。
型号：
'use strict'
var Usuarios = require('./consultora-connection').Usuarios,
Anuncios = require('./consultora-connection').Anuncios,
Suscriptores = require('./consultora-connection').Suscriptores,
Contactos = require('./consultora-connection').Contactos,
bcrypt = require('bcrypt-nodejs'),
nodemailer = require('nodemailer'),
ip = require('ip'),
passport = require('passport'),
Consultora = ()=>{}
Consultora.inicio = (cb)=>{
cb()
}
控制器：
'use strict'
var ConsultoraModel = require('../models/consultora-model'),
HtmlEntities = require('html-entities').AllHtmlEntities,
entities = new HtmlEntities(),
md5 = require('md5'),
fs = require('fs'),
ConsultoraController = ()=>{}
ConsultoraController.inicio = (req, res, next)=>{
ConsultoraModel.inicio(()=>{
let locals={
title: `Now Consultora`,
description: `El mejor lugar para encontrar de todo.`,
keywords:"now consultora, desarrollo web, diseño publicitario, google adwords, facebook ads, asesorias",
data:{
sesion: (req.user) ? true : false
}
}
if(!req.user){//I have to delete the cookie after closing the session so that the problem does not continue
res.clearCookie('connect.sid', { path: '/' });
}
res.render('index', locals)
})
}
路由器：
'use strict'
var ConsultoraController = require('../controllers/consultora-controller'),
express = require('express'),
passportConfig = require('../models/passport'),
multer = require('multer'),
storage = multer.diskStorage({
destination: function (req, file, cb) {
cb(null, './public/img/anuncios')
},
filename: function (req, file, cb) {
cb(null, req.body.id+"-"+file.fieldname+'.png')
}
}),
upload = multer({storage: storage, fileFilter: function (req, file, cb) {
if (!file.originalname.match(/\.(png|jpg)$/)) {
return cb(new Error('Error en el tipo de archivo.'));
}
cb(null, true);
}
}),
cpUpload= upload.fields([{name:'img1', maxCount: 1}]),
router = express.Router()
router.get('/', ConsultoraController.inicio)
索引：
extends layout
block content
-if (data.sesion)
include header3.jade
-else
include header1.jade
input(type="hidden").efecto
div#particles-js
//--------------------------------------- CAROUSEL--------------------------------------------------------------
div#carouselExampleIndicators.carousel.slide.position-relative.wow.slideInLeft( data-wow-duration="1s" data-ride="carousel" style="margin-top: 3.5rem;")
ol.carousel-indicators
li(data-target="#carouselExampleIndicators" data-slide-to="0" class="active")
li(data-target="#carouselExampleIndicators" data-slide-to="1")
li(data-target="#carouselExampleIndicators" data-slide-to="2")
div.carousel-inner
div.carousel-item.active.clearfix
img.d-block.float-right.img-carousel-principal(src="http://localhost:3000/img/img1.png?auto=yes&bg=777&fg=555&text=First slide" alt="First slide")
div.carousel-caption.d-none.d-md-block.float-left.d-inline-block.conte-titulo-index
h1.pb-3 ¿Quieres hacer crecer tu negocio?
p.h4.pb-3 ¡Nosotros tenemos la solución!
a(href="#contacto").btn.botones-now.btn-empecemos-principal.hvr-grow EMPECEMOS
div.carousel-item.clearfix
img.d-block.float-right.img-carousel-principal(src="/img/img2.png?auto=yes&bg=666&fg=444&text=Second slide" alt="Second slide")
div.carousel-caption.d-none.d-md-block.float-left.d-inline-block.conte-titulo-index
h1.pb-3 Llegó el momento de crecer tu negocio
p.h4.pb-3 ¡Resultados 100% garantizados!
a(href="#contacto").btn.botones-now.btn-empecemos-principal.hvr-grow EMPECEMOS
div.carousel-item.clearfix
img.d-block.float-right.img-carousel-principal(src="/img/img3.png?auto=yes&bg=555&fg=333&text=Third slide" alt="Third slide")
div.carousel-caption.d-none.d-md-block.float-left.d-inline-block.conte-titulo-index
h1.pb-3 ¿Quieres hacer crecer tu negocio?
p.h4.pb-3 ¡Nosotros tenemos la solución!
a(href="#contacto").btn.botones-now.btn-empecemos-principal.hvr-grow EMPECEMOS
a.carousel-control-prev(href="#carouselExampleIndicators" role="button" data-slide="prev")
span.carousel-control-prev-icon(aria-hidden="true")
span.sr-only Previous
a.carousel-control-next(href="#carouselExampleIndicators" role="button" data-slide="next")
span.carousel-control-next-icon(aria-hidden="true")
span.sr-only Next
护照：
var passport = require('passport'),
LocalStrategy = require('passport-local').Strategy,
Usuarios = require('../models/consultora-connection').Usuarios
passport.serializeUser((usuario, done)=>{
return done(null, usuario._id)
})
passport.deserializeUser((id, done)=>{
Usuarios.findById(id, (err,usuario)=>{
return done(err, usuario)
})
})
passport.use(new LocalStrategy(
{usernameField: 'correo'},
(correo, password, done)=>{
Usuarios.findOne({correo}, (err, usuario)=>{
if(!usuario){
return done(null, false, {message: `Este correo ${correo} no
esta registrado`})
}else{
usuario.compararPassword(password, (err, sonIguales)=>{
if(sonIguales){
return done(null, usuario)
}else{
return done(null, false, {message: 'La contraseña no es
válida'})
}
})
}
})
}
))
exports.estaAutenticado = (req, res, next)=>{
if(req.isAuthenticated()){
return next()
}
return res.redirect('/')
}
exports.noestaAutenticado= (req, res, next)=>{
if(!req.isAuthenticated()){
return next()
}
return res.redirect('/')
}
答案 0 :(得分：0)
每当您在Express中发送响应并且不立即终止请求时，都会收到此错误。您的代码将继续运行，并可以在第一个响应已分派之后尝试发送第二个响应。我现在倾向于在我的路由处理程序不只是基本的时候使用这种语法：
extension ViewController: CAAnimationDelegate {
func animationDidStop(_ anim: CAAnimation, finished flag: Bool) {
someLabel.layer.mask = nil
}
}
或：
return res.render(...);
我相信您的原因是两次定义ConsultoraModel.inicio引起的，这肯定会引起与此相关的一些奇怪行为。定义函数，然后再次调用函数，将函数主体传递给函数。
res.render(...);
return;
您应该将控制器代码更改为此：
ConsultoraController.inicio = (req, res, next)=>{
ConsultoraModel.inicio(()=>{