用workbox 加速amp、pwa 访问教程步骤精简

时间 2019-12-19

标签 workbox 加速 amp pwa 访问教程步骤精简繁體版

原文原文链接

amp-pwa-workbox

Google codelabs中amp-pwa-workbox的教程步骤精简。javascript

步骤

安装workbox-clicss
```
npm install -g workbox-cli
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```
根目录引入workbox-sw.dev.v2.0.0.js文件html

新建src/sw.js，配置service-worker的缓存规则java

importScripts('workbox-sw.dev.v2.0.0.js');

const workboxSW = new self.WorkboxSW();
workboxSW.precache([]);
//TODO:add more runtime cache logic code
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新建/workbox-cli-config.js,配置precache的文件路径列表git

module.exports = {
  "globDirectory": "./",
  "globPatterns": [
    "img/**.*"
    //TODO:add more file path patterns
  ],
  "swSrc": "src/sw.js",
  "swDest": "service-worker.js",
  "globIgnores": [
    "./workbox-cli-config.js"
  ]
};
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命令行执行workbox inject:manifest生成/service-worker.jsgithub

在全部html文件添加<amp-install-serviceworker>来注册swshell

引入<amp-install-serviceworker>AMP组件

<script async custom-element="amp-install-serviceworker" src="https://cdn.ampproject.org/v0/amp-install-serviceworker-0.1.js"></script>

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html文件中注册sw

<amp-install-serviceworker 
  src="/service-worker.js" 
  layout="nodisplay"
  data-iframe-src="/install-service-worker.html">
</amp-install-serviceworker>
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新建/install-service-worker.html

<!doctype html>
<html>
  <head>
    <title>Installing service worker</title>
    <script type="text/javascript">
      if ('serviceWorker' in navigator) {
        navigator.serviceWorker.register('/service-worker.js')
          .then(function(reg) {
            console.log('SW scope: ', reg.scope);
          })
          .catch(function(err) {
            console.log('SW registration failed: ', err);
          });
      };
    </script>
  </head>
  <body>
  </body>
</html>
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修改src/sw.js以缓存访问过的页面npm

workboxSW.router.registerRoute('/*', args => {
  // if it is a resource request such as a image
  if (args.event.request.mode !== 'navigate') {
    return workboxSW.strategies.cacheFirst().handle(args);
  }
  //if it is a navigation request to a new page
  return workboxSW.strategies.networkFirst().handle(args);
});
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修改src/sw.js以缓存AMP 运行时json

workboxSW.router.registerRoute(/(.*)cdn\.ampproject\.org(.*)/,
  workboxSW.strategies.staleWhileRevalidate()
);
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缓存一个自定义的离线网页浏览器

新建/offline.html

<!doctype html>
<html>
<head>
  <meta charset="utf-8">
  <title>The Photo Blog - Offline</title>
  <meta name="viewport"
        content="width=device-width,minimum-scale=1,initial-scale=1">
</head>
<body>
  <h1>You are Offline</h1>
</body>
</html>
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更新workbox-cli-config.js以缓存offline.html

"globPatterns": [
    "img/**.*",
    "offline.html"
  ]
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更新src/sw.js以处理离线/在线时的网络请求

workboxSW.router.registerRoute('/*', args => {
  if (args.event.request.mode !== 'navigate') {
    return workboxSW.strategies.cacheFirst().handle(args);
  }
  return workboxSW.strategies.networkFirst().handle(args).then(response => {
    if (!response) {
      return caches.match('offline.html');
    }
    return response;
  });
});
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执行workbox inject:manifest来从新生成/service-worker.js

到app-manifest生成manifest.json文件

全部html文件添加mainifest路径引用

<link rel="manifest" href="/manifest.json">
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更新workbox-cli-config.js以缓存index.html和icons

"globPatterns": [
  "img/**.*",
  "offline.html",
  "index.html",
  "icons/**.*"
]
...
"templatedUrls": {
  "/": ["index.html"]
}
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再次执行workbox inject:manifest

可选1：建立一个app shell

新建shell.html

<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <link rel="manifest" href="/manifest.json">
    <meta name="viewport" content="width=device-width,minimum-scale=1,initial-scale=1">  
    <title>AMP to PWA Demo</title>
    <style type="text/css">
    /* omit */
    </style>
  </head>
  <body>
    <header class="header">
      <img src="/img/amp_logo_white.svg" width="36" height="36" />
      <h1><a href="/">AMP PWA Codelab - PWA</a></h1>
    </header>    
    <div id="amproot">
      <!-- AMP Content should appear here! -->
    </div>
    <h2>This is the app shell!</h2>
  </body>
</html>
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更新workbox-cli-config.js

"globPatterns": [
    ...
    "shell.html",
    "js/app.js"
  ],
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更新src/sw.js以让网页导航都匹配到/shell.html

workboxSW.router.registerRoute('/*', args => {
  if (args.event.request.mode !== 'navigate') {
    return workboxSW.strategies.cacheFirst().handle(args);
  }
  return caches.match('/shell.html', {ignoreSearch: true});
});
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shell.html中引入AMP-Shadow-DOM runtime library和app.js

<!-- Asynchronously load the AMP-Shadow-DOM runtime library. -->
<script async src="https://cdn.ampproject.org/shadow-v0.js"></script>
...
<script src="/js/app.js" type="text/javascript" defer></script>
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app.js中书写逻辑

class Router {
    replaceLinks(document) {
        // TODO replace links
    }
}

class AmpPage {
    constructor(rootElement) {
        this.rootElement = rootElement;
    }

    _fetchDocument(url) {...};

    loadDocument(url) {
        // Add code to load a document and attach to Shadow Root
        return this._fetchDocument(url).then(document => {
            // Manipulating the content of the AMP filean
            // here remove header DOM element
            const header = document.querySelector('.header');
            header.remove();
            window.AMP.attachShadowDoc(this.rootElement, document, url);
        });
    }
}

const ampReadyPromise = new Promise(resolve => {
    (window.AMP = window.AMP || []).push(resolve);
});
const router = new Router();

// get a reference to the container and URL, and load the AMP page
// when ampReadyPromise resolves.
const ampRoot = document.querySelector('#amproot');
const url = document.location.href;
const amppage = new AmpPage(ampRoot, router);
ampReadyPromise.then(() => {
    amppage.loadDocument(url);
});
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执行workbox inject:manifest来更新/service-worker.js

可选2：给不支持服务工做者的浏览器提供回退

codelabs.developers.google.com/codelabs/am…

原文：github.com/wdpm/amp-pw…

用workbox 加速amp、pwa 访问 教程步骤精简

amp-pwa-workbox

步骤

可选1：建立一个app shell

可选2：给不支持服务工做者的浏览器提供回退

用workbox 加速amp、pwa 访问教程步骤精简