这个快速代码有什么问题？

Question

您好，我正在尝试检查两个 mysql 值，如果它与数据库中的任何内容匹配，它需要生成一个令牌，但它似乎不起作用:( 每次我运行此代码时，我都会遇到连接超时：

var express = require('express');
var router = express.Router();
var mysql = require("mysql");
var randomstring = require("randomstring");
/* GET users listing. */
router.get('/', function(req, res, next) {
  // First you need to create a connection to the db
var connection = mysql.createConnection({
  host: "localhost",
  user: "segfault",
  password: "wnk9ctte2endcKzBKtre7auE",
  database: "segfault"
});
connection.connect();
var input_user = req.body.username;
var input_pass = req.body.password;
var token = randomstring.generate(12);
connection.query('SELECT username FROM segfault.users AS username', function(err, rows, fields) {
  if (err) throw err;

  for(var i in rows){
    username = rows[i].username;
    if(input_user == username){
      connection.query('SELECT password FROM segfault.users AS password', function(err, rows, fields) {
          if(rows[i].password == input_pass){
              res.send("OK: "+ token);
              console.log("OK:" + token)
          }
      });

    }
  }

});
connection.end();

});

module.exports = router;

请告诉我我做错了什么！

Answer 1

您无需等待查询结果就关闭了与数据库的连接。

将connection.end(); 移动到res.send 之后的回调内部。