Javascript 如何停止Node.JS通知流?
我正在尝试从Javascript 如何停止Node.JS通知流?,javascript,node.js,push-notification,Javascript,Node.js,Push Notification,我正在尝试从Node.js应用程序发送推送通知。根据一些教程和示例,我现在有了一个可以工作的迷你应用程序 它所做的是非常基本的,当它被加载到浏览器中时,每15秒就会触发一次通知,用户每次都会看到弹出的消息 问题是:如何停止通知循环? 此时,即使在我关闭网页时,通知也会每隔15秒发出一次 为了便于参考,我在这里放了两个相关文件: index.js: const express = require('express'), webPush = require('web-push'),
Node.js
应用程序发送推送通知。根据一些教程和示例,我现在有了一个可以工作的迷你应用程序
它所做的是非常基本的,当它被加载到浏览器中时,每15秒就会触发一次通知,用户每次都会看到弹出的消息
问题是:如何停止通知循环?
此时,即使在我关闭网页时,通知也会每隔15秒发出一次
为了便于参考,我在这里放了两个相关文件:
index.js:
const express = require('express'),
webPush = require('web-push'),
bodyParser = require('body-parser'),
path = require('path');
const app = express();
app.use(express.static(path.join(__dirname, 'client')));
app.use(bodyParser.json());
const privateVapIdKey = process.env.privVapIdKey,
publicVapIdKey = process.env.pubVapIdKey;
webPush.setVapidDetails(
'mailto:myemail@example.com',
publicVapIdKey,privateVapIdKey);
// Subscribe Route.
app.post('/subscribe',(req,res) => {
const subscription = req.body; // Get Push Subscription Object.
res.status(201).json({}); // Send 201. Resource created.
// Do a lot of useful things ......
.......
// Create the PayLoad.
const payload = JSON.stringify({
title:'A big title!',
........
});
// Pass Object to sendNotification loop.
const SECS = 15 * 1000;
setInterval(() => {
// Do a lot of useful things ......
.......
webPush.sendNotification(subscription,payload).catch(err => console.error(err));
}, SECS);
});
const port = 5003;
const PORT = process.env.PORT || port;
app.listen(PORT, () => console.log(`Listening on ${ PORT }`));
const publicVapIdKey = 'my-secret-3453754...pubVapIdKey';
// Chec for ServiceWorker.
if ('serviceWorker' in navigator) {
send().catch(err => console.error(err));
}
// Register ServiceWorker, Register Push, Send Push.
async function send() {
console.log("Registering ServiceWorker.");
const register = await navigator.serviceWorker.register('/worker.js', {
scope: "/"
});
console.log('ServiceWorker registered.');
console.log("Registering Push.");
//register.pushManager.uns
const subscription = await register.pushManager.subscribe({
userVisibleOnly: true,
applicationServerKey: urlBase64ToUint8Array(publicVapIdKey)
});
console.log('Push registered.');
console.log("Sending Push.");
await fetch('/subscribe', {
method: 'POST',
body: JSON.stringify(subscription),
headers: {
'content-type': 'application/json'
}
});
console.log('Push sent.');
}
function urlBase64ToUint8Array(base64String) {
const padding = '='.repeat((4 - base64String.length % 4) % 4);
const base64 = (base64String + padding)
.replace(/\-/g, '+')
.replace(/_/g, '/');
const rawData = window.atob(base64);
const outputArray = new Uint8Array(rawData.length);
for (let i = 0; i < rawData.length; ++i) {
outputArray[i] = rawData.charCodeAt(i);
}
return outputArray;
}
client.js:
const express = require('express'),
webPush = require('web-push'),
bodyParser = require('body-parser'),
path = require('path');
const app = express();
app.use(express.static(path.join(__dirname, 'client')));
app.use(bodyParser.json());
const privateVapIdKey = process.env.privVapIdKey,
publicVapIdKey = process.env.pubVapIdKey;
webPush.setVapidDetails(
'mailto:myemail@example.com',
publicVapIdKey,privateVapIdKey);
// Subscribe Route.
app.post('/subscribe',(req,res) => {
const subscription = req.body; // Get Push Subscription Object.
res.status(201).json({}); // Send 201. Resource created.
// Do a lot of useful things ......
.......
// Create the PayLoad.
const payload = JSON.stringify({
title:'A big title!',
........
});
// Pass Object to sendNotification loop.
const SECS = 15 * 1000;
setInterval(() => {
// Do a lot of useful things ......
.......
webPush.sendNotification(subscription,payload).catch(err => console.error(err));
}, SECS);
});
const port = 5003;
const PORT = process.env.PORT || port;
app.listen(PORT, () => console.log(`Listening on ${ PORT }`));
const publicVapIdKey = 'my-secret-3453754...pubVapIdKey';
// Chec for ServiceWorker.
if ('serviceWorker' in navigator) {
send().catch(err => console.error(err));
}
// Register ServiceWorker, Register Push, Send Push.
async function send() {
console.log("Registering ServiceWorker.");
const register = await navigator.serviceWorker.register('/worker.js', {
scope: "/"
});
console.log('ServiceWorker registered.');
console.log("Registering Push.");
//register.pushManager.uns
const subscription = await register.pushManager.subscribe({
userVisibleOnly: true,
applicationServerKey: urlBase64ToUint8Array(publicVapIdKey)
});
console.log('Push registered.');
console.log("Sending Push.");
await fetch('/subscribe', {
method: 'POST',
body: JSON.stringify(subscription),
headers: {
'content-type': 'application/json'
}
});
console.log('Push sent.');
}
function urlBase64ToUint8Array(base64String) {
const padding = '='.repeat((4 - base64String.length % 4) % 4);
const base64 = (base64String + padding)
.replace(/\-/g, '+')
.replace(/_/g, '/');
const rawData = window.atob(base64);
const outputArray = new Uint8Array(rawData.length);
for (let i = 0; i < rawData.length; ++i) {
outputArray[i] = rawData.charCodeAt(i);
}
return outputArray;
}
const publivapidkey='my-secret-3453754…publivapidkey';
//服务工人的Chec。
if(导航器中的“serviceWorker”){
send().catch(err=>console.error(err));
}
//注册ServiceWorker、注册推送、发送推送。
异步函数send(){
log(“注册ServiceWorker”);
const register=wait navigator.serviceworner.register('/worker.js'{
范围:“/”
});
日志('ServiceWorker registered');
log(“注册推送”);
//register.pushManager.uns
const subscription=wait register.pushManager.subscripte({
userVisibleOnly:true,
applicationServerKey:urlBase64ToUint8Array(publicVapIdKey)
});
log('Push registered');
日志(“发送推送”);
等待获取(“/subscribe”{
方法:“POST”,
正文:JSON.stringify(订阅),
标题:{
“内容类型”:“应用程序/json”
}
});
console.log('Push-sent');
}
函数urlBase64ToUint8Array(base64String){
常量填充='='.repeat((4-base64String.length%4)%4);
常量base64=(base64String+填充)
.替换(/\-/g,“+”)
.替换(/_/g,“/”);
const rawData=window.atob(base64);
const outputArray=新的Uint8Array(rawData.length);
for(设i=0;i
我想我需要在
等待获取('/subscribe',{
在client.js内部。但我不是100%确定,如果要这样做,我如何编写代码。您需要做的是跟踪您的
setInterval
函数,然后像这样使用clearInterval
函数:
const SECS = 15 * 1000;
const notificationLoop = setInterval(() => {
// Do a lot of useful things ......
webPush.sendNotification(subscription,payload).catch(err => console.error(err));
}, SECS);
当您要停止时:
clearInterval(notificationLoop);
更多关于
请确保保留您的
通知循环的引用
,以防止其未定义。您的建议非常有趣,但您提到的页面涉及客户端工作的内容(给出的示例是一个计时器,带有停止按钮)。在我的情况下,通知是从服务器发出的。情况有所不同。阅读了相当多的内容后,我认为我需要在现有的订阅功能之外添加一些取消订阅功能。但我不确定如何做。