相关疑难解决方法(0)

我是node.js和MySQL初学者,我刚开始设置并尝试一些基本代码.但是,由于某种原因,我甚至无法与服务器建立简单的连接.我使用默认设置安装最新的MySQL Community 8.0数据库和Node.JS.

这是我的node.js代码

    var mysql = require('mysql');

    var con = mysql.createConnection({
      host: "localhost",
      user: "root",
      password: "password",
      insecureAuth : true
    });

    con.connect(function(err) {
      if (err) throw err;
      console.log("Connected!");
    });

以下是命令提示符中发现的错误:

C:\Users\mysql-test>node app.js
    C:\Users\mysql-test\node_modules\mysql\lib\protocol\Parse
    r.js:80
            throw err; // Rethrow non-MySQL errors
            ^

Error: ER_NOT_SUPPORTED_AUTH_MODE: Client does not support authentication protocol requested by server; consider upgrading MySQL client
    at Handshake.Sequence._packetToError (C:\Users\mysql-
test\node_modules\mysql\lib\protocol\sequences\Sequence.js:52:14)
    at Handshake.ErrorPacket (C:\Users\mysql-test\node_mo
dules\mysql\lib\protocol\sequences\Handshake.js:130:18)
    at Protocol._parsePacket (C:\Users\mysql-test\node_mo
dules\mysql\lib\protocol\Protocol.js:279:23)
    at Parser.write (C:\Users\mysql-test\node_modules\mys
ql\lib\protocol\Parser.js:76:12)
    at Protocol.write (C:\Users\mysql-test\node_modules\m
ysql\lib\protocol\Protocol.js:39:16)
    at Socket.<anonymous> (C:\Users\mysql-test\node_modul …

我想开始在MySQL中编写查询.

show grants 说明:

+--------------------------------------+
| Grants for @localhost                |
+--------------------------------------+
| GRANT USAGE ON *.* TO ''@'localhost' |
+--------------------------------------+

我没有任何用户ID,但是当我想创建一个用户时,我没有权限,即使我没有一个用户,我也不知道如何设置权限!

mysql> CREATE USER 'parsa'@'localhost' IDENTIFIED BY 'parsa';
ERROR 1227 (42000): Access denied; you need (at least one of) the CREATE USER pr
ivilege(s) for this operation

我试图以root身份登录:

mysql> mysql -u root -p;
ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that
corresponds to your MySQL server version for the right syntax to use …

我已经安装了 Node.js，如下所示：

root@server1:~#apt-get install nodejs

然后安装npm如下：

root@server1:~#apt-get install npm

然后在服务器目录中安装MySQL模块，如下所示：

root@server1:~#cd /var/www/
root@server1:/var/www# npm install mysql

下面是node.js服务器（server.js）的代码（使用正确的凭据而不是xxx）：

var mysql = require('mysql');

var db_config = {
    host      : 'localhost',
    user      : 'xxx',
    password  : 'xxx',
    database  : 'xxx'
};

var connection;

function handleDisconnect(){

    connection = mysql.createConnection(db_config);


    connection.connect(function(err) {
        if(err) {
            console.log('error when connecting to db:', err);
            setTimeout(handleDisconnect, 2000);
        }
    });

    connection.on('error', function(err) {
        console.log('db error', err);
        if(err.code === 'PROTOCOL_CONNECTION_LOST') {
            handleDisconnect();
        }
        else{
             throw err;
        }
    });
 }

 handleDisconnect();   

当我运行 Node.js …