Я продолжаю получать сообщение «Не удается установить заголовки после их отправки», создавая Node / Express API.
Проблема в том, что я не устанавливаю заголовки после того, как ответ был отправлен куда-либо. Я всегда вызываю res.status (xxx) .json ({}), чтобы закрыть любое условие.
Маршрут
const router = require('express').Router();
router.get('/password/validate/:hash', PasswordController.validate);
router.post('/password/update', PasswordController.update);
Контроллер
Здесь происходит ошибка. Я звоню на подтвердить запрос специально.
// Import node packages
const mongoose = require('mongoose');
const Password = require('../models/password');
const User = require('../models/user');
const bcrypt = require('bcryptjs');
const moment = require('moment');
const string = require('../middleware/string_functions')
exports.update = (req, res, next) => {
User.findOne({ email: req.body.email })
.exec()
.then(user => {
if (!user) {
res.status(401).json({
message: 'Cannot retrieve account'
})
}
const expiry = moment().add(30, 'seconds');
const unique_string = string.generate_random(32);
const url_hash = string.base64_encode(unique_string +':'+ user._id);
bcrypt.hash(unique_string, 10, (err, hash) => {
if (err) {
res.status(500).json({
error: err.message
})
}
const query = { user_id: user._id }
const newData = {
hash,
expiry
}
Password.findOneAndUpdate(query, newData, { upsert: true, new: true })
.exec()
.then(request => {
res.status(201).json({
message: 'success',
url: 'localhost:8081/users/password/validate/' + url_hash,
data: request
})
})
.catch(err => {
res.status(500).json({
error: err.message
})
})
})
})
.catch(err => {
res.status(500).json({
error: err.message
})
})
}
exports.validate = (req, res, next) => {
if (!req.params.hash) {
res.status(500).json({
error: 'Missing hash'
})
}
const data = string.base64_decode(req.params.hash).split(':');
console.log(data)
Password.findOne({ user_id: data[1] })
.exec()
.then(request => {
if (!request) {
res.status(404).json({
message: 'Change request not found or expired'
})
}
bcrypt.compare( data[0], request.hash, (err, result) => {
if (err) {
res.status(500).json({
error: err.message
})
}
if (result) {
if (moment().isAfter(request.expiry)) {
res.status(401).json({
message: 'Time has expired'
})
}
res.status(200).json({
message: 'Hash validation successful'
})
}
res.status(500).json({
error: 'Something went wrong'
})
})
})
.catch(err => {
res.status(500).json({
error: err.message
})
})
}
Ошибка консоли
_http_outgoing.js:494
throw new Error('Can\'t set headers after they are sent.');
^
Error: Can't set headers after they are sent.
at validateHeader (_http_outgoing.js:494:11)
at ServerResponse.setHeader (_http_outgoing.js:501:3)
at ServerResponse.header (/Users/chrislloyd/Development/Projects/happy-hour-api/node_modules/express/lib/response.js:767:10)
at ServerResponse.send (/Users/chrislloyd/Development/Projects/happy-hour-api/node_modules/express/lib/response.js:170:12)
at ServerResponse.json (/Users/chrislloyd/Development/Projects/happy-hour-api/node_modules/express/lib/response.js:267:15)
at bcrypt.compare (/Users/chrislloyd/Development/Projects/happy-hour-api/api/controllers/passwords.js:83:22)
at /Users/chrislloyd/Development/Projects/happy-hour-api/node_modules/bcryptjs/dist/bcrypt.js:297:21
at /Users/chrislloyd/Development/Projects/happy-hour-api/node_modules/bcryptjs/dist/bcrypt.js:1353:21
at Immediate.next [as _onImmediate] (/Users/chrislloyd/Development/Projects/happy-hour-api/node_modules/bcryptjs/dist/bcrypt.js:1233:21)
at runCallback (timers.js:789:20)
at tryOnImmediate (timers.js:751:5)
at processImmediate [as _immediateCallback] (timers.js:722:5)
Обновленный пример
exports.update = (req, res, next) => {
// Check if hash value exists
if (!req.params.hash) {
res.status(500).json({
error: 'Missing hash value'
});
return;
}
// Check if password and confirmation are the same
if (req.body.password != req.body.passwordConfirmation) {
res.status(401).json({
message: 'Password confirmation does not match'
});
return;
}
// Decode and split hash and user id into array
const data = string.base64_decode(req.params.hash).split(':');
// Find record that contains user id
Password.findOne({ user_id: data[1] })
.exec()
.then(request => {
console.log(request)
// Throw 404 error if record is not found
if (!request) {
return res.status(404).json({
message: 'Password change request doest not exist or timed out'
});
}
// Check if change request has expired
if (moment().isAfter(request.expiry)) {
res.status(401).json({
message: 'Password change request expired',
request: {
request: 'http://localhost:3001/users/password/request'
}
});
// Delete expired record
Password.remove({ _id: request._id })
.exec()
.catch(err => {
res.status(500).json({
error: err.message
});
});
return;
}
// Compare hash value from encoded string to encrypted hash value in database
console.log(mongoose.Types.ObjectId(request.user_id))
bcrypt.compare( data[0], request.hash, (err, result) => {
// Bcrypt error performing comparison
if (err) {
res.status(500).json({
error: err.message
});
return;
}
// Check if result is true
if (result) {
// Find user record matching request.user_id and update password
User.findOneAndUpdate({ _id: mongoose.Types.ObjectId(request.user_id) }, {$set: { password: req.body.password }}, {new: true}, (err, user) => {
console.log(user)
// Error finding and updating user record
if (err) {
res.status(500).json({
error: err.message
});
return;
}
// If returned user account is not null
if (user) {
res.status(200).json({
message: 'Password updated',
user
});
return;
}
// Could not find user record
res.status(404).json({
message: 'Could not find user account to update'
});
return;
})
}
// Catch all error
res.status(500).json({
error: 'Something went wrong'
});
return;
})
})
.catch(err => {
res.status(500).json({
error: err.message
});
return;
});
}