BigKoa = BigView + Koa
bigview的生命周期
bigview的生命周期精简
biglet的生命周期
Install
$ npm i -g bigview-cli
Usages
$ bpm a b c
generate ~/a/MyPagelet.js
generate ~/a/index.html
generate ~/a/index.js
generate ~/a/req.js
generate ~/b/MyPagelet.js
generate ~/b/index.html
generate ~/b/index.js
generate ~/b/req.js
generate ~/c/MyPagelet.js
generate ~/c/index.html
generate ~/c/index.js
generate ~/c/req.js
$ npm i -S bigview
const MyBigView = require('./MyBigView')
app.get('/', function (req, res) {
var bigpipe = new MyBigView(req, res, 'basic/index', { title: "测试" })
var Pagelet1 = require('./bpmodules/basic/p1')
var pagelet1 = new Pagelet1()
var Pagelet2 = require('./bpmodules/basic/p2')
var pagelet2 = new Pagelet2()
bigpipe.add(pagelet1)
bigpipe.add(pagelet2)
bigpipe.start()
});
app.get('/nest', function (req, res) {
var bigpipe = new MyBigView(req, res, 'nest/index', { title: "测试" })
var Pagelet1 = require('./bpmodules/nest/p1')
var pagelet1 = new Pagelet1()
var Pagelet2 = require('./bpmodules/nest/p2')
var pagelet2 = new Pagelet2()
pagelet1.addChild(pagelet2)
bigpipe.add(pagelet1)
bigpipe.start()
});
views/nest/index.html是bp的布局文件
<!doctype html>
<html class="no-js">
<head>
<title><%= title %></title>
<link rel="stylesheet" href="/stylesheets/style.css">
</head>
<body>
<div id="pagelet2" class="pagelet2">load,,,,</div>
<ul>
<% pagelets.forEach(function(p){ %>
<li><%= p.name %> | <%= p.selector %>
<% if (p.children.length) { %>
<ul>
<% p.children.forEach(function(sub){ %>
<li> subPagelet = <%= sub.name %> | <%= sub.selector %>
<% }) %>
</ul>
<% } %>
<% }) %>
</ul>
<% pagelets.forEach(function(p){ %>
<div id="<%= p.location %>" class="<%= p.selector %>">loading...<%= p.name %>...</div>
<% }) %>
<script src="/js/jquery.min.js"></script>
<script src="/js/bigpipe.js"></script>
<script>
var bigpipe=new Bigpipe();
<% pagelets.forEach(function(p){ %>
bigpipe.ready('<%= p.name %>',function(data){
$("#<%= p.location %>").html(data);
})
<% }) %>
bigpipe.ready('pagelet2',function(data){
$("#pagelet2").html(data);
})
</script>
</body>
</html>
遍历pagelets来生成各种页面需要的即可。
views/nest2/index.html是bp的布局文件
<!doctype html>
<html class="no-js">
<head>
<title><%= title %></title>
<link rel="stylesheet" href="/stylesheets/style.css">
</head>
<body>
<ul>
<% pagelets.forEach(function(p){ %>
<li><%= p.name %> | <%= p.selector %>
<% if (p.children.length) { %>
<ul>
<% p.children.forEach(function(sub){ %>
<li> subPagelet = <%= sub.name %> | <%= sub.selector %>
<% }) %>
</ul>
<% } %>
<% }) %>
</ul>
<% pagelets.forEach(function(p){ %>
<div id="<%= p.location %>" class="<%= p.selector %>">loading...<%= p.name %>...</div>
<% }) %>
<script src="/js/jquery.min.js"></script>
<script src="/js/bigpipe.js"></script>
<script>
var bigpipe=new Bigpipe();
<% pagelets.forEach(function(p){ %>
bigpipe.ready('<%= p.name %>',function(data){
$("#<%= p.location %>").html(data);
})
<% }) %>
</script>
</body>
</html>
此时无任何pagelet2的布局
在bpmodules/nest2/p1/p1.html里，输出pagelet2的布局。
<script>bigpipe.set("pagelet1", '<%= is %>');</script>
<div id="pagelet2" class="pagelet2">load,,,,</div>
<script>
bigpipe.ready('pagelet2',function(data){
$("#pagelet2").html(data);
})
</script>
自定义p1和p2，设置this.immediately = false
'use strict'
const Pagelet = require('../../../../packages/biglet')
module.exports = class MyPagelet extends Pagelet {
constructor () {
super()
this.root = __dirname
this.name = 'pagelet1'
this.data = { is: "pagelet1测试" }
this.selector = 'pagelet1'
this.location = 'pagelet1'
this.tpl = 'p1.html'
this.delay = 4000
this.immediately = false
}
fetch () {
let pagelet = this
return require('./req')(pagelet)
}
}
自定义BigView基类
'use strict'
const BigView = require('../../../packages/bigview')
module.exports = class MyBigView extends BigView {
before () {
let self = this
return new Promise(function(resolve, reject) {
self.showPagelet = self.query.a
resolve(true)
})
}
afterRenderLayout () {
let self = this
if (self.showPagelet === '1') {
self.run('pagelet1')
} else {
self.run('pagelet2')
}
// console.log('afterRenderLayout')
return Promise.resolve(true)
}
}
在bigview
'use strict'
const debug = require('debug')('bigview')
const fs = require('fs')
const MyBigView = require('./MyBigView')
module.exports = function (req, res) {
var bigpipe = new MyBigView(req, res, 'if/index', { title: "条件选择pagelet" })
bigpipe.add(require('./p1'))
bigpipe.add(require('./p2'))
bigpipe.start()
}
var bigpipe = new MyBigView(req, res, 'error/index', { title: "测试" })
// bigpipe.mode = 'render'
bigpipe.add(require('./p1'))
bigpipe.addErrorPagelet(require('./error'))
显示ErrorPagelet，可以在bigview的生命周期，执行子Pagelets之前。reject一个error即可。
比如在afterRenderLayout里，reject
afterRenderLayout() {
let self = this
// console.log('afterRenderLayout')
return new Promise(function(resolve, reject) {
setTimeout(function() {
reject(new Error('xxxxxx'))
// resolve()
}, 0)
})
}
通过addErrorPagelet设置Error时要显示的模块，如果要包含多个，请使用pagelet子模块。
另外，如果设置了ErrorPagelet，布局的时候可以使用errorPagelet来控制错误显示
<!doctype html>
<html class="no-js">
<head>
<title><%= title %></title>
<link rel="stylesheet" href="/stylesheets/style.css">
</head>
<body>
<div id="<%= errorPagelet.location %>" class="<%= errorPagelet.selector %>">
<ul>
<% pagelets.forEach(function(p){ %>
<li><%= p.name %> | <%= p.selector %>
<% }) %>
</ul>
<% pagelets.forEach(function(p){ %>
<div id="<%= p.location %>" class="<%= p.selector %>">loading...<%= p.name %>...</div>
<% }) %>
</div>
<script src="/js/jquery.min.js"></script>
<script src="/js/bigpipe.js"></script>
<script>
var bigpipe=new Bigpipe();
<% pagelets.forEach(function(p){ %>
bigpipe.ready('<%= p.name %>',function(data){
$("#<%= p.location %>").html(data);
})
<% }) %>
bigpipe.ready('<%= errorPagelet.name %>',function(data){
$("#<%= errorPagelet.location %>").html(data);
})
</script>
<script src="/bigconsole.min.js"></script>
</body>
</html>
提供trigger方法，可以触发1个多个多个其他模块，无序并行。结果返回的是Promise
'use strict'
const Pagelet = require('../../../../packages/biglet')
const somePagelet1 = require('./somePagelet1')
const somePagelet2 = require('./somePagelet2')
const somePagelet = require('./somePagelet')
module.exports = class MyPagelet extends Pagelet {
constructor () {
super()
this.root = __dirname
this.name = 'pagelet1'
}
fetch () {
// 触发一个模块
this.trigger(new somePagelet())
// 触发一个模块
this.trigger([new somePagelet1(), new somePagelet2()])
}
}
不允许，直接
return this.trigger([require('./somePagelet1'), require('./somePagelet2')])
这样会有缓存，不会根据业务请求来进行不同处理。
也可以强制的fetch里完成
'use strict'
const Pagelet = require('../../../../packages/biglet')
const somePagelet1 = require('./somePagelet1')
const somePagelet2 = require('./somePagelet2')
const somePagelet = require('./somePagelet')
module.exports = class MyPagelet extends Pagelet {
constructor () {
super()
this.root = __dirname
this.name = 'pagelet1'
}
fetch () {
// 触发多个模块
return this.trigger([new somePagelet1, new somePagelet2()])
}
}
app.get('/', function (req, res) {
var bigpipe = new MyBigView(req, res, 'basic/index', { title: "测试" })
var Pagelet1 = require('./bpmodules/basic/p1')
var pagelet1 = new Pagelet1()
var Pagelet2 = require('./bpmodules/basic/p2')
var pagelet2 = new Pagelet2()
bigpipe.add(pagelet1)
bigpipe.add(pagelet2)
// bigpipe.preview('aaaa.html')
bigpipe.previewFile = 'aaaa.html'
bigpipe.start()
});
方法
'use strict'
const Pagelet = require('../../../../packages/biglet')
module.exports = class MyPagelet extends Pagelet {
constructor () {
super()
this.root = __dirname
this.name = 'pagelet1'
this.data = { is: "pagelet1测试" }
this.location = 'pagelet1'
this.tpl = 'p1.html'
this.selector = 'pagelet1'
this.delay = 2000
}
fetch () {
return new Promise(function(resolve, reject){
setTimeout(function() {
// self.owner.end()
resolve(self.data)
}, 4000);
})
}
}
只需要重写fetch方法，并且返回Promise对象即可。如果想多个，就利用Promise的链式写法解决即可
无论http也好，还是其他方式（rpc）也好，都是需要参数的
所以要做的，依然是上面的fetch方法，由于pagelet是独立的，所以无法直接获取bigview页面的参数。
但是pagelet里有一个owner对象，其实就是bigview对象。
先看一下模块入口
'use strict'
const debug = require('debug')('bigview')
const fs = require('fs')
const MyBigView = require('./MyBigView')
module.exports = function (req, res) {
var bigpipe = new MyBigView(req, res, 'basic/index', { title: "测试" })
var Pagelet1 = require('./p1')
var pagelet1 = new Pagelet1()
var Pagelet2 = require('./p2')
var pagelet2 = new Pagelet2()
bigpipe.add(pagelet1)
bigpipe.add(pagelet2)
// bigpipe.preview('aaaa.html')
bigpipe.isMock = true
bigpipe.previewFile = 'aaaa.html'
bigpipe.start()
}
很明显这就是一个express中间件。
app.get('/', require('./bpmodules/basic'));
所以获取QueryString就很简单了，从req.query里获得就可以了。然后赋值给bigpipe对象。
实际上，bigview已经做了这件事，它自身已经绑定了3个获取参数的属性
所以在req.js里可以这样使用
例子如下
'use strict'
module.exports = function (pagelet) {
console.log(pagelet.owner.query)
pagelet.delay = 1000
return new Promise(function(resolve, reject){
setTimeout(function() {
// self.owner.end()
resolve(pagelet.data)
}, pagelet.delay)
})
}
'use strict'
const Pagelet = require('../../../../packages/biglet')
module.exports = class MyPagelet extends Pagelet {
constructor () {
super()
this.root = __dirname
this.name = 'pagelet1'
this.data = { is: "pagelet1测试" }
this.location = 'pagelet1'
this.tpl = 'p1.html'
this.selector = 'pagelet1'
this.delay = 2000
}
fetch () {
return new Promise(function(resolve, reject){
setTimeout(function() {
// self.owner.end()
resolve(self.data)
}, 4000);
})
}
render (tpl, data) {
const ejs = require('ejs')
let self = this
return new Promise(function(resolve, reject){
ejs.renderFile(tpl, data, self.options, function(err, str){
// str => Rendered HTML string
if (err) {
console.log(err)
reject(err)
}
resolve(str)
})
})
}
}
重写render()方法，如果不重写则采用默认的模板引擎ejs编译。
render方法的参数
.
├── MyBigView.js（实现类，继承自bigview）
├── index.js （返回MyBigView以及p1和p2等pagelet模块的组织）
├── p1（pagelet模块）
│ ├── index.js
│ ├── p1.html
│ └── req.js
└── p2（pagelet模块）
├── index.js
├── p2.html
└── req.js
pagelet的本章是返回模板引擎编译后的html片段。
模板引擎编译（模板 + 数据） = html
唯一比较麻烦的是数据的来源，可能是静态数据，也可能是api请求的数据，所以在设计pagelet的时候，通过集成fetch方法来实现自定义数据。为了进一步
├── p1（pagelet模块）
│ ├── index.js
│ ├── p1.html
│ └── req.js
说明
bigpipe
bigpipe.isMock = true
bigpipe.previewFile = 'aaaa.html'
pagelet带定
var Pagelet1 = require('./bpmodules/basic/p1')
var pagelet1 = new Pagelet1()
pagelet1.mock = true
pagelet1.data = {
xxx: yyy
}
pagelet1.test()
or
$ pt bpmoduless/p1 url
$ pt bpmoduless/p1 aaaa.json
自动跑测试，并给出测试结果
pagelet能复用么？
直接请求，也未尝不可
性能改进
与传统Ajax比较
前端优化，参考微博的方式
异步加载显示模块的方式：BigPipe方式降低模块开发成本、管理成本
var FM=function(a,b,c){function bN(b,c){a.clear&&(bN=a.clear)(b,c)}function bM(b,c,d){a.start&&(bM=a.start)(b,c,d)}function bL(a){return a===null?"":Object.prototype.toString.call(a).slice(8,-1).toLowerCase()}function bK(){bv(function(){bH();for(var a in J){if(I[a]){bB(P,I[a]);delete
<script>FM.view({"ns":"pl.common.webim","domid":"pl_common_webim","css":["style/css/module/list/comb_webim.css?version=f25a07f3fbb17183"],"js":["webim_prime/js/common/all.js?version=8fde40d2c1ecd58b"]})</script>
<script>FM.view({"ns":"pl.top.index","domid":"plc_top","css":[],"js":["home/js/pl/top/index.js?version=8fde40d2c1ecd58b"],"html":""})</script>
<script>
pl.trigger('pagelet1',{
css: ['pl1.css'],
js: ['pl1.js'],
data: {},
html:'<span>Here is pagelet1</span>'
});
</script>
模块的css可以采用各种预处理编写，在提供bigpipe打包功能，合并到一起或者单独引入(可以再考虑)。
4种模式
BigPipe的三种模式：
http://velocity.oreilly.com.cn/2011/ppts/WK_velocity.pdf
review
测试独立
render统一（？）
初始化参数
fetch（）就够用了，不必before（精简生命周期，fetch后增加parse）
layout：先返回布局（压测）（ok）
out模式：同步
日志
开关
性能
共享内存
约定，所有的数据，只能绑定到data上，改成parse
pagelet（传model）
继承自event，外接日志(基本实现)
静态布局和动态布局说明
bigview指定模板demo
pagelet指定外部模板demo
ng proxy给个头compress,expire-buffer
分享
封装前端bigpipe库
主流程bigview上5秒超时，biglet里fetch、parse等操作默认1秒超时，如果不满足，请设置timeout（单位是毫秒）
当获取数据后，某些模块不必要展示的时候，打破biglet的渲染promise链即可
biglet
移除了show属性，没有意义
FAQs
> BigKoa = BigView + Koa
The npm package bigkoa receives a total of 1 weekly downloads. As such, bigkoa popularity was classified as not popular.
We found that bigkoa demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 4 open source maintainers collaborating on the project.
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