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egg-longpolling

v0.2.3-rc.0

Published

[![NPM version][npm-image]][npm-url] [![build status][travis-image]][travis-url] [![Test coverage][codecov-image]][codecov-url] [![David deps][david-image]][david-url] [![Known Vulnerabilities][snyk-image]][snyk-url] [![npm download][download-image]][down

Downloads

9

Readme

egg-longpolling

NPM version build status Test coverage David deps Known Vulnerabilities npm download

提供与客户端的长连接支持。

Install

$ npm i egg-longpolling --save

Usage

// {app_root}/config/plugin.js
exports.longpolling = {
  enable: true,
  package: 'egg-longpolling',
};

Configuration

// {app_root}/config/config.default.js
exports.longpolling = {
  // 可订阅的事件名称,需要在业务中调用 publish 触发此事件,支持两种格式定义:
  // 1. 简单的字符串,可直接使用 publish(eventName) 触发
  // 2. 包含资源 id 区分关心的资源,触发时需要附加参数: publish(eventName, resourceId)
  subjects: [ 'event1',  ['event2', { resourceId: ({ category }) => category }]],
  // 订阅相关的请求,如 /longpolling/1/test
  basePath: '/longpolling/',
  // 订阅连接超时时间,单位为秒
  timeout: 30,
};

see config/config.default.js for more detail.

Example

backend:

app.polling.publish('test'); // 单个事件
app.polling.publish([ 'test1', 'test2' ]); // 批量事件,只支持简单格式
app.polling.publish('complex', 'book'); // 通知只关心 book 类的资源

frontend:

async run() {
  const {id} = await fetch('/longpolling/subscription') // response: { id: 1}
  // start to listen
  const result = await fetch('/longpolling/1/test')

  // or fetch with complex type
  // const result = await fetch('/longpolling/2/complex?category=book)

  // after event emit or timeout, will get response
  console.log(result) // { name: 'test', update: 1 } or { name: 'test', timeout: 1 }
  // TODO: start next listen ...
}

Questions & Suggestions

Please open an issue here.

License

MIT