我正在为我的网站用户实施 chrome 推送通知。我能够成功地做到这一点。我有两个问题?
1) 每当我阻止来自浏览器设置的通知时,如何获取以前的订阅 ID。我必须从我的后端服务器中删除订阅 ID
2) 每当我重新加载网站 pushManager.subscribe 方法时,每次我向服务器发送订阅 id 时都会运行,因此 API 每次都使用相同的订阅 id
推.js
'use strict';
if ('serviceWorker' in navigator) {
console.log('Service Worker is supported');
navigator.serviceWorker.register('service_worker.js').then(function() {
return navigator.serviceWorker.ready;
}).then(function(reg) {
console.log('Service Worker is ready :^)', reg);
reg.pushManager.subscribe({userVisibleOnly: true}).then(function(sub) {
console.log('endpoint:',JSON.stringify(sub.endpoint));
console.log(sub.endpoint.substring('https://android.googleapis.com/gcm/send/'.length));
});
}).catch(function(error) {
console.log('Service Worker error :^(', error);
});
}
服务工作者.js
'use strict';
var myurl;
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', event);
event.waitUntil(
fetch('/notify.json').then(function(response) {
return response.json().then(function(data) {
console.log(JSON.stringify(data));
var title = data.title;
var body = data.body;
myurl=data.myurl;
return self.registration.showNotification(title, {
body: body,
icon: 'profile.png',
tag: 'notificationTag'
});
});
}).catch(function(err) {
console.error('Unable to retrieve data', err);
var title = 'An error occurred';
var body = 'We were unable to get the information for this push message';
return self.registration.showNotification(title, {
body: body,
icon: 'profile.png',
tag: 'notificationTag'
});
})
);
});
// var title = 'Vcona';
// event.waitUntil(
// self.registration.showNotification(title, {
// 'body': 'School Management',
// 'icon': 'profile.png'
// }));
self.addEventListener('notificationclick', function(event) {
console.log('Notification click: tag', event.notification.tag);
// Android doesn't close the notification when you click it
// See http://crbug.com/463146
event.notification.close();
var url = 'https://demo.innotical.com';
// Check if there's already a tab open with this URL.
// If yes: focus on the tab.
// If no: open a tab with the URL.
event.waitUntil(
clients.matchAll({
type: 'window'
})
.then(function(windowClients) {
console.log('WindowClients', windowClients);
for (var i = 0; i < windowClients.length; i++) {
var client = windowClients[i];
console.log('WindowClient', client);
if (client.url === url && 'focus' in client) {
return client.focus();
}
}
if (clients.openWindow) {
return clients.openWindow(myurl);
}
})
);
});