前言
egg.js定时任务备份微信小程序云开发数据库，这里只是简单实现，验证方法有效性，代码比较凌乱，有需要的可以把service下的代码整理一下自用。
参数配置参考我另外一篇文章【巧用Node.js process隐藏项目重要参数】
git地址：github.com/taosiqi/mfa… 【欢迎star】
代码
config/config.default.js
'use strict';
/**
* @param {Egg.EggAppInfo} appInfo app info
*/
module.exports = appInfo => {
/**
* built-in config
* @type {Egg.EggAppConfig}
**/
const config = exports = {};
// 微信相关参数
config.wx = {
appid: process.env.wx_appid,
secret: process.env.wx_secret,
env: process.env.wx_env, // 云环境ID
};
// 腾讯云cos参数
config.cos = {
secretId: process.env.cos_secretId,
secretKey: process.env.cos_secretKey,
bucket: process.env.cos_bucket,
region: process.env.cos_region,
};
// use for cookie sign key, should change to your own and keep security
config.keys = appInfo.name + '_1637136443161_2316';
config.cors = {
origin: '*',
allowMethods: 'GET,HEAD,PUT,POST,DELETE,PATCH',
};
// add your middleware config here
config.middleware = [];
// add your user config here
const userConfig = {
// myAppName: 'egg',
};
return {
...config,
...userConfig,
};
};
复制代码controller/home.js
'use strict';
const Controller = require('egg').Controller;
class HomeController extends Controller {
async index() {
const { ctx } = this;
const result = await ctx.service.home.index();
ctx.logger.info('通过url主动触发备份， 结果: %j', result.statusCode);
ctx.body = result.statusCode;
}
}
module.exports = HomeController;
复制代码schedule/export.js
const Subscription = require('egg').Subscription;
class UpdateCache extends Subscription {
// 通过 schedule 属性来设置定时任务的执行间隔等配置
static get schedule() {
return {
interval: '0 10 2 * * ?', // 每天的2点10分执行一次
type: 'all', // 指定所有的 worker 都需要执行
};
}
// subscribe 是真正定时任务执行时被运行的函数
async subscribe() {
const { ctx } = this;
const result = await ctx.service.home.index();
ctx.logger.info('定时任务执行消息提醒 结果: %j', result.statusCode);
}
}
module.exports = UpdateCache;
复制代码service/home.js
'use strict';
const dayjs = require('dayjs');
const COS = require('cos-nodejs-sdk-v5');
const Service = require('egg').Service;
const file_path = `${dayjs().format('YYYY-MM-DD HH:mm:ss')}.json`;
const url = 'https://api.weixin.qq.com/';
class Index extends Service {
async index() {
const { ctx, config: { wx } } = this;
// 获取access_token
const { data: { access_token } } = await ctx.curl(`${url}cgi-bin/token?grant_type=client_credential&appid=${wx.appid}&secret=${wx.secret}`, {
dataType: 'json',
});
if (!access_token) return { statusCode: 400 };
// 获取job_id
const { data: { job_id } } = await ctx.curl(`${url}tcb/databasemigrateexport?access_token=${access_token}`, {
method: 'POST',
contentType: 'json',
data: {
env: wx.env,
file_path,
file_type: '1',
query: 'db.collection("SecretList").get()', // 要获取的数据，也可以自己写
},
dataType: 'json',
});
if (!job_id) return { statusCode: 400 };
return await this.firmwareTimer(access_token, job_id);
}
async firmwareTimer(access_token, job_id) {
const { ctx, config: { wx, cos } } = this;
const cloudCos = new COS({
SecretId: cos.secretId,
SecretKey: cos.secretKey,
});
// 导出任务需要时间完成，数据越大需要的时间越多，我这里200k数据大约需要5-10s
return new Promise(resolve => {
let count = 10;
let firmwareTimer = setInterval(async () => {
count -= 1; // 防止长时间使用setInterval，10次后自动清除
// 通过job_id拿到文件
const { data: { status, file_url } } = await ctx.curl(`${url}tcb/databasemigratequeryinfo?access_token=${access_token}`, {
method: 'POST',
contentType: 'json',
data: {
env: wx.env,
job_id,
},
dataType: 'json',
});
if (status === 'success') {
clearInterval(firmwareTimer);
firmwareTimer = null;
const { data } = await ctx.curl(file_url);
// 上传到腾讯云oss
cloudCos.putObject({
Bucket: cos.bucket,
Region: cos.region,
Key: `bt_backup/mfa-export-database/${file_path}`,
Body: data,
}, function(err, data) {
resolve(err || data);
});
}
if (count) {
clearInterval(firmwareTimer);
firmwareTimer = null;
}
}, 5000);
});
}
}
module.exports = Index;
复制代码引用
结语
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