使用Koa
和Koa-router
,我在POST
上编写了一个接受/videos
的函数,然后将视频保存到HDFS(分布式数据库)中。保存过程结束后,应将响应发送给客户端,说明上传完成。但是,在I / O finsh之前返回响应。我是JavaScript新手,请帮助。
app.js:
/**
* Module dependencies.
*/
const logger = require('koa-logger');
const serve = require('koa-static');
const koaBody = require('koa-body');
const Koa = require('koa');
const app = new Koa();
const os = require('os');
const path = require('path');
var Router = require('koa-router');
var router = new Router();
// log requests
app.use(logger());
app.use(koaBody({ multipart: true }));
app.use(serve(path.join(__dirname, '/public')));
app
.use(router.routes())
.use(router.allowedMethods());
// listen
app.listen(3000);
console.log('listening on port 3000');
module.exports ={
app:app,
router:router
}
require('./services/service_upload.js')
service_upload.js
const router = require('../app.js').router
const upload = require('../business/business_uploadVideo.js')
function service_upload() {
router.post('/videos', function (ctx, next) {
upload.upload(ctx, function () {
})
ctx.body='upload finish'
console.log("redirect/")
});
}
service_upload()
答案 0 :(得分:0)
如果您使用的是最近版本的Koa和koa-router,那么您可以通过承诺以这种方式使用 async / await :
WHERE
EJEM.EJ_tran_event_id = '5011' --SignOn
AND EJEM.EJ_tran_event_id = '5119' --Reinit Printer
AND EJEM.EJ_tran_event_id = '5101' --NoSale
AND
EJTM.event_date_time between '2017-06-06 03:00:00.000' and '2017-06-08 03:00:00.000'
AND
EJEM.language_id = 'EN-US'
更多关于承诺:https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise
有关async / await的更多信息:https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/await