Javascript 服务人员基本设置
我有以下服务人员代码:Javascript 服务人员基本设置,javascript,html,service-worker,Javascript,Html,Service Worker,我有以下服务人员代码: 'use strict'; // Incrementing CACHE_VERSION will kick off the install event and force previously cached // resources to be cached again. const CACHE_VERSION = 1; let CURRENT_CACHES = { offline: 'offline-v' + CACHE_VERSION }; const OF
'use strict';
// Incrementing CACHE_VERSION will kick off the install event and force previously cached
// resources to be cached again.
const CACHE_VERSION = 1;
let CURRENT_CACHES = {
offline: 'offline-v' + CACHE_VERSION
};
const OFFLINE_URL = 'offline.php';
function createCacheBustedRequest(url) {
let request = new Request(url, {cache: 'reload'});
// See https://fetch.spec.whatwg.org/#concept-request-mode
// This is not yet supported in Chrome as of M48, so we need to explicitly check to see
// if the cache: 'reload' option had any effect.
if ('cache' in request) {
return request;
}
// If {cache: 'reload'} didn't have any effect, append a cache-busting URL parameter instead.
let bustedUrl = new URL(url, self.location.href);
bustedUrl.search += (bustedUrl.search ? '&' : '') + 'cachebust=' + Date.now();
return new Request(bustedUrl);
}
self.addEventListener('install', event => {
event.waitUntil(
// We can't use cache.add() here, since we want OFFLINE_URL to be the cache key, but
// the actual URL we end up requesting might include a cache-busting parameter.
fetch(createCacheBustedRequest(OFFLINE_URL)).then(function(response) {
return caches.open(CURRENT_CACHES.offline).then(function(cache) {
return cache.put(OFFLINE_URL, response);
});
})
);
});
self.addEventListener('activate', event => {
// Delete all caches that aren't named in CURRENT_CACHES.
// While there is only one cache in this example, the same logic will handle the case where
// there are multiple versioned caches.
let expectedCacheNames = Object.keys(CURRENT_CACHES).map(function(key) {
return CURRENT_CACHES[key];
});
event.waitUntil(
caches.keys().then(cacheNames => {
return Promise.all(
cacheNames.map(cacheName => {
if (expectedCacheNames.indexOf(cacheName) === -1) {
// If this cache name isn't present in the array of "expected" cache names,
// then delete it.
console.log('Deleting out of date cache:', cacheName);
return caches.delete(cacheName);
}
})
);
})
);
});
self.addEventListener('fetch', event => {
// We only want to call event.respondWith() if this is a navigation request
// for an HTML page.
// request.mode of 'navigate' is unfortunately not supported in Chrome
// versions older than 49, so we need to include a less precise fallback,
// which checks for a GET request with an Accept: text/html header.
if (event.request.mode === 'navigate' ||
(event.request.method === 'GET' &&
event.request.headers.get('accept').includes('text/html'))) {
console.log('Handling fetch event for', event.request.url);
event.respondWith(
fetch(createCacheBustedRequest(event.request.url)).catch(error => {
// The catch is only triggered if fetch() throws an exception, which will most likely
// happen due to the server being unreachable.
// If fetch() returns a valid HTTP response with an response code in the 4xx or 5xx
// range, the catch() will NOT be called. If you need custom handling for 4xx or 5xx
// errors, see https://github.com/GoogleChrome/samples/tree/gh-pages/service-worker/fallback-response
console.log('Fetch failed; returning offline page instead.', error);
return caches.match(OFFLINE_URL);
})
);
}
// If our if() condition is false, then this fetch handler won't intercept the request.
// If there are any other fetch handlers registered, they will get a chance to call
// event.respondWith(). If no fetch handlers call event.respondWith(), the request will be
// handled by the browser as if there were no service worker involvement.
});
如何使它不必在缓存中保存任何内容?有问题的webapp需要随时连接。因此,该服务人员的主要目的是有资格安装电话,并具有以后的推送通知功能 经过一些在线研究,以下是最佳解决方案: sw_install.js
console.log('Started', self);
self.addEventListener('install', function(event) {
self.skipWaiting();
console.log('Installed', event);
});
self.addEventListener('activate', function(event) {
console.log('Activated', event);
});
self.addEventListener('push', function(event) {
console.log('Push message received', event);
// TODO
});
main.js
if ('serviceWorker' in navigator) {
console.log('Service Worker is supported');
navigator.serviceWorker.register('sw_install.js').then(function(reg){
console.log(':^)', reg);
// TODO
}).catch(function(err) {
console.log(':^(', err);
});
}
经过一些在线研究,以下是最佳解决方案: sw_install.js
console.log('Started', self);
self.addEventListener('install', function(event) {
self.skipWaiting();
console.log('Installed', event);
});
self.addEventListener('activate', function(event) {
console.log('Activated', event);
});
self.addEventListener('push', function(event) {
console.log('Push message received', event);
// TODO
});
main.js
if ('serviceWorker' in navigator) {
console.log('Service Worker is supported');
navigator.serviceWorker.register('sw_install.js').then(function(reg){
console.log(':^)', reg);
// TODO
}).catch(function(err) {
console.log(':^(', err);
});
}
您可以使用npm sw工具箱库() main.js
if(navigator.serviceWorker){
register('/service worker.js',{scope:'./'})
.然后(功能(注册){
控制台日志(“软件注册”,注册);
})
.catch(函数(e){
控制台。错误(“错误”,e);
})
}否则{
console.log('此浏览器不支持服务工作程序')
}
}
服务工作者.js
(全局=>{
"严格使用",;
//加载sw tookbox库。
importScripts('/js/sw toolbox.js');
var precache_url=[
“/index.html”,
“/img/logo.png”,
“/img/main.png”
];
//仅用于调试
global.toolbox.options.debug=true;
global.toolbox.router.get('/img/(.*),self.toolbox.cacheFirst{
缓存:{
名称:“图像”,
最大输入:10
}
});
global.toolbox.router.default=global.toolbox.networkFirst;
global.addEventListener('install',event=>event.waitill(global.skipWaiting());
global.addEventListener('activate',event=>event.waitUntil(global.clients.claim());
全局.addEventListener('push',事件=>{
var pushObj=event.data.json();
var pushData=pushObj.data;
//推送有效负载(如果有),如果没有,则进行ajax get调用以获取有效负载(可以使用fetch)
var title=pushData&&pushData.title;
var body=pushData&&pushData.body;
var icon='/img/logo.png';
event.waitUntil(全局注册)showNotification(标题{
身体:身体,,
图标:图标,
徽章:图标
数据:pushData
}));
});
global.addEventListener('notificationclick',事件=>{
event.notification.close();
var url=event.notification.data.url | |'/';
event.waitill(
客户。匹配球({
键入:“窗口”
})。然后(WindowClient=>{
console.log('WindowClients',WindowClients);
对于(var i=0;i
您可以使用npm sw工具箱库()
main.js
if(navigator.serviceWorker){
register('/service worker.js',{scope:'./'})
.然后(功能(注册){
控制台日志(“软件注册”,注册);
})
.catch(函数(e){
控制台。错误(“错误”,e);
})
}否则{
console.log('此浏览器不支持服务工作程序')
}
}
服务工作者.js
(全局=>{
"严格使用",;
//加载sw tookbox库。
importScripts('/js/sw toolbox.js');
var precache_url=[
“/index.html”,
“/img/logo.png”,
“/img/main.png”
];
//仅用于调试
global.toolbox.options.debug=true;
global.toolbox.router.get('/img/(.*),self.toolbox.cacheFirst{
缓存:{
名称:“图像”,
最大输入:10
}
});
global.toolbox.router.default=global.toolbox.networkFirst;
global.addEventListener('install',event=>event.waitill(global.skipWaiting());
global.addEventListener('activate',event=>event.waitUntil(global.clients.claim());
全局.addEventListener('push',事件=>{
var pushObj=event.data.json();
var pushData=pushObj.data;
//推送有效负载(如果有),如果没有,则进行ajax get调用以获取有效负载(可以使用fetch)
var title=pushData&&pushData.title;
var body=pushData&&pushData.body;
var icon='/img/logo.png';
event.waitUntil(全局注册)showNotification(标题{
身体:身体,,
图标:图标,
徽章:图标
数据:pushData
}));
});
global.addEventListener('notificationclick',事件=>{
event.notification.close();
var url=event.notification.data.url | |'/';
event.waitill(
客户。匹配球({
键入:“窗口”
})。然后(WindowClient=>{
console.log('WindowClients',WindowClients);
对于(var i=0;i
你不能,你知道,删除保存到缓存中的行吗?问题是,第一行代码中都使用了变量,所以我想知道,在以后的推送通知开发中,最基本的最小值是什么。cache.put(离线URL,响应)代码>这将把东西保存到缓存中。尝试删除它。你不能,你知道,删除保存到缓存中的行吗?问题是,第一行代码中都使用了变量,所以我想知道,在以后的推送通知开发中,最基本的最小值是什么。cache.put(OFFLINE\u URL,response);代码>