我正在使用ejs和mysql数据库开发用户登录和注册系统。当服务器在localhost中运行时，我想创建数据库和表，但是当我运行项目并输入用户名和密码进行注册时，节点js cmd中出现以下错误。
Microsoft Windows [Version 10.0.17134.885]
(c) 2018 Microsoft Corporation. All rights reserved.
C:\Users\Khundokar Nirjor\Desktop\node-authentication>node server.js
The magic happens on port 8000
GET /signup 304 32.447 ms - -
events.js:180
throw er; // Unhandled 'error' event
^
Error: Cannot enqueue Handshake after already enqueuing a Handshake.
at Protocol._validateEnqueue (C:\Users\Khundokar Nirjor\Desktop\node-authentication\node_modules\mysql\lib\protocol\Protocol.js:221:16)
at Protocol._enqueue (C:\Users\Khundokar Nirjor\Desktop\node-authentication\node_modules\mysql\lib\protocol\Protocol.js:138:13)
at Protocol.handshake (C:\Users\Khundokar Nirjor\Desktop\node-authentication\node_modules\mysql\lib\protocol\Protocol.js:51:23)
at Connection.connect (C:\Users\Khundokar Nirjor\Desktop\node-authentication\node_modules\mysql\lib\Connection.js:119:18)
at Strategy._verify (C:\Users\Khundokar Nirjor\Desktop\node-authentication\config\passport.js:54:24)
at Strategy.authenticate (C:\Users\Khundokar Nirjor\Desktop\node-authentication\node_modules\passport-local\lib\strategy.js:88:12)
at attempt (C:\Users\Khundokar Nirjor\Desktop\node-authentication\node_modules\passport\lib\middleware\authenticate.js:341:16)
at authenticate (C:\Users\Khundokar Nirjor\Desktop\node-authentication\node_modules\passport\lib\middleware\authenticate.js:342:7)
at Layer.handle [as handle_request] (C:\Users\Khundokar Nirjor\Desktop\node-authentication\node_modules\express\lib\router\layer.js:95:5)
at next (C:\Users\Khundokar Nirjor\Desktop\node-authentication\node_modules\express\lib\router\route.js:137:13)
Emitted 'error' event at:
at Connection._handleProtocolError (C:\Users\Khundokar Nirjor\Desktop\node-authentication\node_modules\mysql\lib\Connection.js:426:8)
at Protocol.emit (events.js:203:13)
at Protocol._delegateError (C:\Users\Khundokar Nirjor\Desktop\node-authentication\node_modules\mysql\lib\protocol\Protocol.js:398:10)
at Handshake.<anonymous> (C:\Users\Khundokar Nirjor\Desktop\node-authentication\node_modules\mysql\lib\protocol\Protocol.js:232:10)
at Handshake.emit (events.js:203:13)
at Handshake.Sequence.end (C:\Users\Khundokar Nirjor\Desktop\node-authentication\node_modules\mysql\lib\protocol\sequences\Sequence.js:78:12)
at C:\Users\Khundokar Nirjor\Desktop\node-authentication\node_modules\mysql\lib\protocol\Protocol.js:236:14
at processTicksAndRejections (internal/process/task_queues.js:75:11) {
code: 'PROTOCOL_ENQUEUE_HANDSHAKE_TWICE',
fatal: false
}
这是我的代码db.js ..
// config/database.js
module.exports = {
'connection': {
'host': 'localhost',
'user': 'root',
'password': ''
},
'database': 'mydb1',
'users_table': 'users'
};
这是护照.js的代码
// config/passport.js
// load all the things we need
var LocalStrategy = require('passport-local').Strategy;
// load up the user model
var mysql = require('mysql');
var bcrypt = require('bcrypt-nodejs');
var dbconfig = require('./database');
var connection = mysql.createConnection(dbconfig.connection);
connection.connect();
connection.query('USE ' + dbconfig.database);
//connection.end();
// expose this function to our app using module.exports
module.exports = function(passport) {
// =========================================================================
// passport session setup ==================================================
// =========================================================================
// required for persistent login sessions
// passport needs ability to serialize and unserialize users out of session
// used to serialize the user for the session
passport.serializeUser(function(user, done) {
done(null, user.id);
});
// used to deserialize the user
passport.deserializeUser(function(id, done) {
connection.connect();
connection.query("SELECT * FROM users WHERE id = ? ",[id], function(err, rows){
done(err, rows[0]);
});
// connection.end();
});
// =========================================================================
// LOCAL SIGNUP ============================================================
// =========================================================================
// we are using named strategies since we have one for login and one for signup
// by default, if there was no name, it would just be called 'local'
passport.use(
'local-signup',
new LocalStrategy({
// by default, local strategy uses username and password, we will override with email
usernameField : 'username',
passwordField : 'password',
passReqToCallback : true // allows us to pass back the entire request to the callback
},
function(req, username, password, done) {
// find a user whose email is the same as the forms email
// we are checking to see if the user trying to login already exists
connection.connect();
connection.query("SELECT * FROM users WHERE username = ?",[username], function(err, rows) {
if (err)
return done(err);
if (rows.length) {
return done(null, false, req.flash('signupMessage', 'That username is already taken.'));
} else {
// if there is no user with that username
// create the user
var newUserMysql = {
username: username,
password: bcrypt.hashSync(password, null, null) // use the generateHash function in our user model
};
var insertQuery = "INSERT INTO users ( username, password ) values (?,?)";
connection.connect();
connection.query(insertQuery,[newUserMysql.username, newUserMysql.password],function(err, rows) {
newUserMysql.id = rows.insertId;
return done(null, newUserMysql);
});
// connection.end();
}
});
// connection.end();
})
);
// =========================================================================
// LOCAL LOGIN =============================================================
// =========================================================================
// we are using named strategies since we have one for login and one for signup
// by default, if there was no name, it would just be called 'local'
passport.use(
'local-login',
new LocalStrategy({
// by default, local strategy uses username and password, we will override with email
usernameField : 'username',
passwordField : 'password',
passReqToCallback : true // allows us to pass back the entire request to the callback
},
function(req, username, password, done) { // callback with email and password from our form
connection.connect();
connection.query("SELECT * FROM users WHERE username = ?",[username], function(err, rows){
if (err)
return done(err);
if (!rows.length) {
return done(null, false, req.flash('loginMessage', 'No user found.')); // req.flash is the way to set flashdata using connect-flash
}
// if the user is found but the password is wrong
if (!bcrypt.compareSync(password, rows[0].password))
return done(null, false, req.flash('loginMessage', 'Oops! Wrong password.')); // create the loginMessage and save it to session as flashdata
// all is well, return successful user
return done(null, rows[0]);
});
// connection.end();
})
);
};
这是代码create_database.js
/**
* Created by barrett on 8/28/14.
*/
var mysql = require('mysql');
var dbconfig = require('../config/database');
var connection = mysql.createConnection(dbconfig.connection);
connection.query('CREATE DATABASE ' + dbconfig.database);
connection.query('\
CREATE TABLE `' + dbconfig.database + '`.`' + dbconfig.users_table + '` ( \
`id` INT UNSIGNED NOT NULL AUTO_INCREMENT, \
`username` VARCHAR(20) NOT NULL, \
`password` CHAR(60) NOT NULL, \
PRIMARY KEY (`id`), \
UNIQUE INDEX `id_UNIQUE` (`id` ASC), \
UNIQUE INDEX `username_UNIQUE` (`username` ASC) \
)');
console.log('Success: Database Created!')
//connection.end();