chat-server/qq-imsvr/node_modules/mysql2/examples/mysqlproxy.js

var mysql = require('../index.js');

var server = mysql.createServer();
server.listen(3307);
server.on('connection', function(conn) {
  console.log('connection');

  conn.serverHandshake({
    protocolVersion: 10,
    serverVersion: 'node.js rocks',
    connectionId: 1234,
    statusFlags: 2,
    characterSet: 8,
    capabilityFlags: 0xffffff
  });

  conn.on('field_list', function(table, fields) {
    console.log('field list:', table, fields);
    conn.writeEof();
  });

  var remote = mysql.createConnection({user: 'root', database: 'dbname', host:'server.example.com', password: 'secret'});

  conn.on('query', function(sql) {
    console.log('proxying query:' + sql);
    remote.query(sql, function(err) { // overloaded args, either (err, result :object) 
                                      // or (err, rows :array, columns :array)
      if (Array.isArray(arguments[1])) {
        // response to a 'select', 'show' or similar
        var rows = arguments[1], columns = arguments[2];
        console.log('rows', rows);
        console.log('columns', columns);
        conn.writeTextResult(rows, columns);
      } else {
        // response to an 'insert', 'update' or 'delete' 
        var result = arguments[1];
        console.log('result', result);
        conn.writeOk(result);
      }
    });
  });

  conn.on('end', remote.end.bind(remote));
});