在UI5应用程序中，我在index.html中注册了我的服务工作者：
$(document).ready(function() {
if ('serviceWorker' in navigator) {
navigator.serviceWorker
.register('service-worker.js', { scope: './' })
.then(function(registration) {
console.log("Service Worker Registered");
})
.catch(function(err) {
console.log("Service Worker Failed to Register", err);
})
}
});
此外，我在根文件夹中有文件service-worker.js，以便服务工作者可以缓存其下的所有元素 . 该文件包含以下代码：
// Set a name for the current cache
var cacheName = 'v2';
// Default files to always cache
var cacheFiles = [
'./',
'./inicio.html?I_APLICACION=CAPCGENA02',
'./resources/sap-ui-core.js',
'./resources/sap/ui/core/themes/base/fonts/SAP-icons.ttf',
'./resources/sap-ui-core.js',
'./resources/sap/ui/core/library-preload.js',
'./resources/sap/m/library-preload.js',
'./resources/sap/ui/unified/library-preload.js',
'./resources/sap/ui/comp/library-preload.js',
'./resources/sap/ui/table/library-preload.js',
'./resources/sap/ui/fl/library-preload.js',
'./resources/sap/tnt/library-preload.js',
'./resources/sap/ui/unified/themes/sap_belize/library-parameters.json',
'./resources/sap/ui/table/themes/sap_belize/library-parameters.json',
'./resources/sap/ui/comp/themes/sap_belize/library-parameters.json',
'./resources/sap/tnt/themes/sap_belize/library-parameters.json',
'./resources/sap/ui/layout/library-preload.js',
'./resources/sap/ui/unified/themes/sap_belize/library.css',
'./resources/sap/ui/table/themes/sap_belize/library.css',
'./resources/sap/ui/comp/themes/sap_belize/library.css',
'./resources/sap/tnt/themes/sap_belize/library.css',
'./css/style.css',
'./css/fonts/ttf/CMEEMEN18.ttf',
'./images/temporal/chart.PNG',
'./Component.js',
'./Component-preload.js',
'./manifest.json',
'./api/api.reformation.data.js',
'./api/ApiManager.js',
'./api/ApiStructure.js',
'./api/ibd.api.login.data.js',
'./controller/Home.controller.js',
'./controller/Login.controller.js',
'./controller/Menu.controller.js',
'./controller/fragment/ManagePartes.js',
'./controller/fragment/FilterDialogController.js',
'./controller/structure/Container.controller.js',
'./controller/structur
'./database/apiBBDD.js',
'./database/bbdd.js',
'./i18n/i18n.properties',
'./i18n/i18n_en.properties',
'./i18n/i18n_es.properties',
'./i18n/i18n_en_US.properties',
'./i18n/i18n_es_ES.properties',
'./manager/dataManager/DataManager.js',
'./manager/functionalityManager/FunctionalityManager.js',
'./manager/mappingManager/MappingManager.js',
'./manager/parserManager/ReformationParser.js',
'./manager/sessionManager/SessionManager.js',
'./manager/structureManager/ElementManager.js',
'./manager/structureManager/StructureManager.js',
'./manager/viewManager/ViewManager.js',
'./singleton/Singleton.js',
'./utils/Consts.js',
'./utils/Funcionality.js',
'./utils/FunctionalityEvent.js',
'./utils/MaskedPassword.js',
'./utils/Utils.js',
'./view/Home.view.xml',
'./view/Login.view.xml',
'./view/Menu.view.xml',
'./view/fragment/DialogConfirm.fragment.xml',
'./view/fragment/DialogEnd.fragment.xml',
'./view/fragment/DialogError.fragment.xml',
'./view/fragment/DialogTag.fragment.xml',
'./view/fragment/DialogWaiting.fragment.xml',
'./view/fragment/HistoryDialog.fragment.xml',
'./view/fragment/HistoryNoticeDialog.fragment.xml',
]
self.addEventListener('install', function(e) {
console.log('[ServiceWorker] Installed');
// e.waitUntil Delays the event until the Promise is resolved
e.waitUntil(
// Open the cache
caches.open(cacheName).then(function(cache) {
// Add all the default files to the cache
console.log('[ServiceWorker] Caching cacheFiles');
//return cache.addAll(cacheFiles);
return cache.addAll(cacheFiles.map(url => new Request(url, {credentials: 'same-origin'})));
})
); // end e.waitUntil
});
self.addEventListener('activate', function(e) {
console.log('[ServiceWorker] Activated');
e.waitUntil(
// Get all the cache keys (cacheName)
caches.keys().then(function(cacheNames) {
return Promise.all(cacheNames.map(function(thisCacheName) {
// If a cached item is saved under a previous cacheName
if (thisCacheName !== cacheName) {
// Delete that cached file
console.log('[ServiceWorker] Removing Cached Files from Cache - ', thisCacheName);
return caches.delete(thisCacheName);
}
}));
})
); // end e.waitUntil
});
self.addEventListener('fetch', function(e) {
console.log('[ServiceWorker] Fetch', e.request.url);
// e.respondWidth Responds to the fetch event
e.respondWith(
// Check in cache for the request being made
caches.match(e.request)
.then(function(response) {
// If the request is in the cache
if ( response ) {
console.log("[ServiceWorker] Found in Cache", e.request.url, response);
// Return the cached version
return response;
}
// If the request is NOT in the cache, fetch and cache
var requestClone = e.request.clone();
fetch(requestClone)
.then(function(response) {
if ( !response ) {
console.log("[ServiceWorker] No response from fetch ")
return response;
}
var responseClone = response.clone();
// Open the cache
caches.open(cacheName).then(function(cache) {
// Put the fetched response in the cache
cache.put(e.request, responseClone);
console.log('[ServiceWorker] New Data Cached', e.request.url);
// Return the response
return response;
}); // end caches.open
})
.catch(function(err) {
console.log('[ServiceWorker] Error Fetching & Caching New Data', err);
});
}) // end caches.match(e.request)
); // end e.respondWith
});
有了这一切，我就可以正确安装和激活我的服务工作者了 . 如果我进入缓存存储选项卡，我会缓存信息：
我的连接是安全的（HTTPS）但是当我进入离线模式时，请求从缓存磁盘而不是服务工作者返回 .
我想这是因为它是从浏览器的自动缓存中获取的，但如果我点击Chrome中的“禁用缓存”选项，它就不会加载离线页面 .
有谁知道为什么会这样？
1 回答
这是对"Has anyone worked on Service Worker Implementation in SAPUI5?"的回答
引自MDN：
所以目前，Service Worker doesn't intercept sync XHRs和UI5会发送许多同步XHR，这解释了为什么those files are not intercepted .
因此，尽量减少同步XHR，如explained in here .
创建Component-Preload文件
尽可能设置
async: true. 例如 .对于组件
preload以值"async"异步加载库 . 例如 . ：xx-waitForTheme的预加载库 . 例如 . ：我也看到you have some fragments . 避免通过fragment factory延迟加载控件，因为通过这种方式同步获取片段 .