Question

我试图在我的react应用程序中实现express来访问我的数据库表，为此我遇到了this package。我使用server来实现一个yarn start文件夹（它通过concurrently和nodemon与index.js脚本一起开始），如下所示：

const express = require('express');
const mysql = require('mysql');

const app = express();

const con = mysql.createConnection({
  host: 'xxxxx',
  user: 'xxxxx',
  password: 'xxxxx',
  database: 'xxxxx',
});

con.connect( err => {
  if (err) {
    console.log(err);
  }
})

app.get('/api/fetch-list', (req, res) => {
  // code to fetch
});

const PORT = 3001;// process.env.PORT || 3000;

app.listen(PORT, () => {
  console.log(`App server now listening on port ${PORT}`);
});

然后，在此组件中调用route / path / api / fetch-list：

import React from 'react';
import axios from 'axios';

function renderTable() {
  axios.get(`${process.env.PUBLIC_URL}/api/fetch-list`).then(res => {
    console.log(res.data);
  });
}

export function component() {
  return (
    <div>
      {renderTable()}
    </div>
  );
}

一旦我转到http：localhost：3000 / table，就会渲染此组件。因此，一旦我运行该项目并转到该地址，我就会在终端控制台中收到以下错误：

{ Error: getaddrinfo ENOTFOUND xxxxx xxxxx:3306
    at errnoException (dns.js:50:10)
    at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:92:26)
    --------------------
    at Protocol._enqueue (/home/gfcf14/Desktop/greendream-redesign/node_modules/mysql/lib/protocol/Protocol.js:144:48)
    at Protocol.handshake (/home/gfcf14/Desktop/greendream-redesign/node_modules/mysql/lib/protocol/Protocol.js:51:23)
    at Connection.connect (/home/gfcf14/Desktop/greendream-redesign/node_modules/mysql/lib/Connection.js:119:18)
    at Object.<anonymous> (/home/gfcf14/Desktop/greendream-redesign/src/server/index.js:27:5)
    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)
  code: 'ENOTFOUND',
  errno: 'ENOTFOUND',
  syscall: 'getaddrinfo',
  hostname: 'xxxxx',
  host: 'xxxxx',
  port: 3306,
  fatal: true }

我不确定为什么会这样。我知道我使用的凭据是正确的，因为它可以在我的旧php代码网站上正常工作。有一会儿，我认为这可能与数据库的位置有关，因为我将其托管在1＆1（ionos）上，并且它们没有授予我专用的服务器。因此，我将凭据更改为一个齿轮主机空间，在该空间中我有另一个数据库（我仍在使用其凭据），而我收到此错误：

{ Error: ER_ACCESS_DENIED_ERROR: Access denied for user 'xxxxx'@'myipaddress' (using password: YES)
    at Handshake.Sequence._packetToError (/home/gfcf14/Desktop/greendream-redesign/node_modules/mysql/lib/protocol/sequences/Sequence.js:47:14)
    at Handshake.ErrorPacket (/home/gfcf14/Desktop/greendream-redesign/node_modules/mysql/lib/protocol/sequences/Handshake.js:123:18)
    at Protocol._parsePacket (/home/gfcf14/Desktop/greendream-redesign/node_modules/mysql/lib/protocol/Protocol.js:291:23)
    at Parser._parsePacket (/home/gfcf14/Desktop/greendream-redesign/node_modules/mysql/lib/protocol/Parser.js:433:10)
    at Parser.write (/home/gfcf14/Desktop/greendream-redesign/node_modules/mysql/lib/protocol/Parser.js:43:10)
    at Protocol.write (/home/gfcf14/Desktop/greendream-redesign/node_modules/mysql/lib/protocol/Protocol.js:38:16)
    at Socket.<anonymous> (/home/gfcf14/Desktop/greendream-redesign/node_modules/mysql/lib/Connection.js:91:28)
    at Socket.<anonymous> (/home/gfcf14/Desktop/greendream-redesign/node_modules/mysql/lib/Connection.js:525:10)
    at emitOne (events.js:116:13)
    at Socket.emit (events.js:211:7)
    --------------------
    at Protocol._enqueue (/home/gfcf14/Desktop/greendream-redesign/node_modules/mysql/lib/protocol/Protocol.js:144:48)
    at Protocol.handshake (/home/gfcf14/Desktop/greendream-redesign/node_modules/mysql/lib/protocol/Protocol.js:51:23)
    at Connection.connect (/home/gfcf14/Desktop/greendream-redesign/node_modules/mysql/lib/Connection.js:119:18)
    at Object.<anonymous> (/home/gfcf14/Desktop/greendream-redesign/src/server/index.js:27:5)
    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)
  code: 'ER_ACCESS_DENIED_ERROR',
  errno: 1045,
  sqlMessage: 'Access denied for user \'xxxxx\'@\'myipaddress\' (using password: YES)',
  sqlState: '28000',
  fatal: true }

所以它也不适合那个。我可能必须检查该站点的权限（乍看之下似乎是READ & WRITE），但是如何获得第一个数据库的连接呢？如果您看到我可能错过的东西，请告诉我

错误：尝试使用正确的凭据连接到远程数据库时出现getaddrinfo ENOTFOUND

0 个答案: