MySql

Question

我正在尝试设置它，以便我的 twitch 机器人可以连接到数据库来存储数据。但是我似乎无法弄清楚如何连接。我输入了所有正确的数据（我可以通过客户端连接凭据）但它仍然无法连接。

var sql = require('mssql');



    var sqlConfig = {
        server: "x",
        username: "x",
        password: "x",
        database: "x"
    };

    (async function () {
      try {
        console.log("sql connecting......")
        let pool = await sql.connect(sqlConfig)
        let result = await pool.request()
          .query('select * from Subject')  // subject is my database table name

        console.log(result )

      } catch (err) {
        console.log(err);
      }
    })()

错误：

            { ConnectionError: Failed to connect to sql2.freemysqlhosting.net:1433 in 15000ms
        at Connection.tedious.once.err (H:\Node JS\TwitchBot\node_modules\mssql\lib\tedious.js:216:17)
        at Object.onceWrapper (events.js:315:30)
        at emitOne (events.js:116:13)
        at Connection.emit (events.js:211:7)
        at Connection.connectTimeout (H:\Node JS\TwitchBot\node_modules\tedious\lib\connection.js:924:12)
        at ontimeout (timers.js:498:11)
        at tryOnTimeout (timers.js:323:5)
        at Timer.listOnTimeout (timers.js:290:5)
      code: 'ETIMEOUT',
      originalError:
       { ConnectionError: Failed to connect to sql2.freemysqlhosting.net:1433 in 15000ms
        at ConnectionError (H:\Node JS\TwitchBot\node_modules\tedious\lib\errors.js:12:12)
        at Connection.connectTimeout (H:\Node JS\TwitchBot\node_modules\tedious\lib\connection.js:924:28)
        at ontimeout (timers.js:498:11)
        at tryOnTimeout (timers.js:323:5)
        at Timer.listOnTimeout (timers.js:290:5)
         message: 'Failed to connect to sql2.freemysqlhosting.net:1433 in 15000ms',
         code: 'ETIMEOUT' },
      name: 'ConnectionError' }

结果 1 这没有用，因为它不是 mysql 是 mssql。我有点笨对不起大家：

      throw new RangeError('Index out of range');


    RangeError: Index out of range
        at checkOffset (buffer.js:977:11)
        at Buffer.readUInt8 (buffer.js:1015:5)
        at Packet.isLast (H:\Node JS\TwitchBot\node_modules\tedious\lib\packet.js:116:29)
        at ReadablePacketStream.<anonymous> (H:\Node JS\TwitchBot\node_modules\tedious\lib\message-io.js:101:18)
        at emitOne (events.js:116:13)
        at ReadablePacketStream.emit (events.js:211:7)
        at addChunk (H:\Node JS\TwitchBot\node_modules\tedious\node_modules\readable-stream\lib\_stream_readable.js:291:12)
        at readableAddChunk (H:\Node JS\TwitchBot\node_modules\tedious\node_modules\readable-stream\lib\_stream_readable.js:278:11)
        at ReadablePacketStream.Readable.push (H:\Node JS\TwitchBot\node_modules\tedious\node_modules\readable-stream\lib\_stream_readable.js:245:10)
        at ReadablePacketStream.Transform.push (H:\Node JS\TwitchBot\node_modules\tedious\node_modules\readable-stream\lib\_stream_transform.js:148:32)

输出 2：

    Error: connect ECONNREFUSED 127.0.0.1:3306
        at Object._errnoException (util.js:992:11)
        at _exceptionWithHostPort (util.js:1014:20)
        at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1186:14)
        --------------------
        at Protocol._enqueue (H:\Node JS\TwitchBot\node_modules\mysql\lib\protocol\Protocol.js:145:48)
        at Protocol.handshake (H:\Node JS\TwitchBot\node_modules\mysql\lib\protocol\Protocol.js:52:23)
        at Connection.connect (H:\Node JS\TwitchBot\node_modules\mysql\lib\Connection.js:130:18)
        at Object.<anonymous> (H:\Node JS\TwitchBot\fb.js:11:12)
        at Module._compile (module.js:652:30)
        at Object.Module._extensions..js (module.js:663:10)
        at Module.load (module.js:565:32)
        at tryModuleLoad (module.js:505:12)
        at Function.Module._load (module.js:497:3)
        at Function.Module.runMain (module.js:693:10)

输出 3：

Error: ER_ACCESS_DENIED_ERROR: Access denied for user ''@'MY isp identifier' (using password: YES)
        at Handshake.Sequence._packetToError (H:\Node JS\TwitchBot\node_modules\mysql\lib\protocol\sequences\Sequence.js:52:14)
        at Handshake.ErrorPacket (H:\Node JS\TwitchBot\node_modules\mysql\lib\protocol\sequences\Handshake.js:130:18)
        at Protocol._parsePacket (H:\Node JS\TwitchBot\node_modules\mysql\lib\protocol\Protocol.js:279:23)
        at Parser.write (H:\Node JS\TwitchBot\node_modules\mysql\lib\protocol\Parser.js:76:12)
        at Protocol.write (H:\Node JS\TwitchBot\node_modules\mysql\lib\protocol\Protocol.js:39:16)
        at Socket.<anonymous> (H:\Node JS\TwitchBot\node_modules\mysql\lib\Connection.js:103:28)
        at emitOne (events.js:116:13)
        at Socket.emit (events.js:211:7)
        at addChunk (_stream_readable.js:263:12)
        at readableAddChunk (_stream_readable.js:250:11)
        --------------------
        at Protocol._enqueue (H:\Node JS\TwitchBot\node_modules\mysql\lib\protocol\Protocol.js:145:48)
        at Protocol.handshake (H:\Node JS\TwitchBot\node_modules\mysql\lib\protocol\Protocol.js:52:23)
        at Connection.connect (H:\Node JS\TwitchBot\node_modules\mysql\lib\Connection.js:130:18)
        at Object.<anonymous> (H:\Node JS\TwitchBot\fb.js:11:12)
        at Module._compile (module.js:652:30)
        at Object.Module._extensions..js (module.js:663:10)
        at Module.load (module.js:565:32)
        at tryModuleLoad (module.js:505:12)
        at Function.Module._load (module.js:497:3)
        at Function.Module.runMain (module.js:693:10)

Answer 1

您正在使用 mssql npm 库连接到 mysql 数据库。这是两个完全不同的 DBMS 系统，因此不交叉兼容。您需要使用正确类型的客户端。

我知道您正在尝试连接到 mysql 数据库，因为在 URL 中我可以看到 https://www.freemysqlhosting.net/ 仅支持托管 `mysql 数据库.这意味着您需要使用正确类型的客户端。

为此，您可以使用 mysql npm 依赖项，代码块如下：

var mysql      = require('mysql');
var connection = mysql.createConnection({
  host     : 'x',
  user     : 'x',
  password : 'x',
  database : 'x'
});

connection.connect();

connection.query('SELECT 1 + 1 AS solution', function (error, results, fields) {
  if (error) throw error;
  console.log('The solution is: ', results[0].solution);
});

connection.end();

这将使用适当的协议打开一个连接并允许您访问您的数据库。

额外阅读

我阅读了有关 the concept of a DBMS 的内容，以加深您对为什么此代码块不起作用的理解。

Answer 2

问题已解决：

如果您根据 npmjs 使用 mssql。com/package/mssql 您应该在 sqlConfig 对象上将 host 替换为 server。（host 用于 mysql，server 用于 mssql）
在 sqlConfig 对象上设置 port：

var sqlConfig = { server: "x", username: "x", password: "x", database: "x", port: "x" };

MySql - 没有在 nodejs 中连接

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