推送Web浏览器的通知 - HelloWorld开发者社区

你如何增加网站的流量？电子商务企业的主要目标是继续吸引现有用户并吸引新访客。通过发送电子邮件通知，短信提醒，社交媒体和网络推送通知，有很多方法可以增加网站流量和客户互动度。今天，我们将看到推送通知如何适用于Web浏览器。这些是通过桌面和移动浏览器发送给用户的通知。这些通知在用户的桌面或移动浏览器上提供 - 无论用户是否在网站上。这些通知允许用户从他们喜欢的网站获得及时更新，并允许开发人员有效地重新使用相关内容以增加网站的流量。

此项目需要以下项目

Website
前端网站，您必须在index.html中包含jav.json文件

manifest.json
有关您的网站扩展的基本元数据信息，这将帮助您与浏览器操作进行通信。

service-worker.js
这是一个脚本文件，您的浏览器在后台运行并执行同步操作。

notification.js
允许浏览器通知的JavaScript文件。这包含将用户注册令牌信息发送到后端服务器的所有操作。

RESTful或ServerSide URL

Subscribe
创建一个简单的服务端插入操作来存储用户注册令牌。

Unsubscribe
以同样的方式创建删除操作以从数据库中删除用户注册令牌。

Get Notification
此URL应以JSON数据格式返回通知数据。

CURL推送通知应用程序
服务器端CURL项目，用于向订阅用户列表发送通知。

数据库
You have to create a database for storing user registration ids/tokens.

CREATE TABLE GMC {
gid INT PRIMARY KEY AUTO_INCREMENT，
rid TEXT
}

This will contain a push notification data.

CREATE TABLE notifications{
nid INT PRIMARY KEY AUTO_INCREMENT，
title VARCHAR（200），
msg VARCHAR（200），
logo VARCHAR（300），
name VARCHAR（100），
url VARCHAR（300）
}

Firebase入门

第1步为Google Cloud Messing
创建Firebase项目。

适用于GCM FCM ID的Firebase应用程序

步骤2
登录Google Developer Console并转到您的信息中心

适用于GCM FCM ID的Firebase应用程序

步骤3
同意firebase条款。

适用于GCM FCM ID的Firebase应用程序

步骤3
选择您的API项目。

适用于GCM FCM ID的Firebase应用程序

步骤4
单击“选择”并选择现有的Firebase项目。适用于GCM FCM ID的Firebase应用程序

步骤5
选择现有项目

适用于GCM FCM ID的Firebase应用程序

步骤6
复制项目身份验证密钥以发送Google Cloud Messaing 适用于GCM FCM ID的Firebase应用程序

步骤7
您的项目客户端ID。

FiID

manifest.json
Meta data information file to communicate with browsers. Here include your project client id, check Step 7 screenshot.

{
"name": "Web Push Demo",
"short_name": "push_demo",
"version": "1.0.0",
"description": "A simple site with push notification",
"author": {
"name": "Srinivas Tamada"
},
"gcm_sender_id": "Your_Client_ID",
"gcm_user_visible_only": true
}

service-worker.js
JavaScript file that your browser runs at the background and perform sync operations. This will always communicate with your project api to get latest notification information. Upload this file in your project index location.

var self = this;
var urlMain;
self.addEventListener("push", function(event) {
event.waitUntil(

  fetch("https://yourwebiste.com/api/getNotification", {
  method: "get"

})
.then(function(response) {

 return response.json();

})
.then(function(result) {

urlMain = result.data.url;
const options = {

  body: result.data.msg,
  icon: result.data.logo,
  image: result.data.name,
  action: result.data.url
};

self.registration.showNotification(result.data.title, options);
})
);
});

self.addEventListener("notificationclick", function(event) {
event.notification.close();
const promiseChain = clients.openWindow(urlMain);

event.waitUntil(promiseChain);

});

index.html
Include manifest.json and notification.js file. Here notification.js is a controller and this works with service-worker.js.

<!DOCTYPE html>
<html>
<head>
<title>Push Demo</title>
<link rel="manifest" href="manifest.json">
</head>
<body>
<div id="container">
<div class="desc"> </div>
<button class="pushButton" disabled>
Subscribe
</button>
</div>
<script src="notification.js"></script>
</body>
</html>

notification.js
JavaScript file to control all the subscribers' information. Bit large file split into different parts.

DocumentContent Loader initilise the service worker and this will verify the user subscription. This Code will launch the Allow and Block popup.

var isPushEnabled = false;
var pushButton = document.querySelector(".pushButton");
var desc = document.querySelector(".desc");
var disableText = "Unsubscribe";
var enableText = "Subscribe";
var disableDesc = "Thank you message";
var enableDesc = "Click <span class='high'>Allow</span> button top left.";

document.addEventListener("DOMContentLoaded", function() {

if (isPushEnabled) {
  unsubscribe();
} else {
  subscribe();
}
serviceWorkerCall();

});

serviceWorkerCall function will register the server-worker.js with initilise function for future actions.

function serviceWorkerCall() {
if ("serviceWorker" in navigator) {

   navigator.serviceWorker.register("/service-worker.js")
   .then(initialiseState);

} else {

    console.warn("Service workers aren't supported in this browser.");
}

}
function initialiseState() {
if (!("showNotification" in ServiceWorkerRegistration.prototype)) {

  console.log("Notifications aren't supported.");
  return;
}
if (Notification.permission === "denied") {
 console.log("The user has blocked notifications.");
 return;
}
if (!("PushManager" in window)) {
 console.log("Push messaging isn't supported.");
 return;
}
navigator.serviceWorker.ready.then(function(serviceWorkerRegistration) {
   serviceWorkerRegistration.pushManager
   .getSubscription()
   .then(function(subscription) {
       pushButton.disabled = false;
       if (!subscription) {
         return;
    }
    if (subscription) {
      sendSubscriptionToServer(subscription);
    }
 pushButton.textContent = disableText;
   desc.textContent = disableDesc;
   isPushEnabled = true;
  })

.catch(function(e) {
console.log("Error during getSubscription()", e);
});
});
}

subscribe and unsubscribe function to change the message and button status.

function subscribe() {
pushButton.disabled = true;
navigator.serviceWorker.ready.then(function(serviceWorkerRegistration) {
serviceWorkerRegistration.pushManager
.subscribe({ userVisibleOnly: true })
.then(function(subscription) {

  isPushEnabled = true;
  pushButton.textContent = disableText;
  desc.textContent = disableDesc;
  pushButton.disabled = false;

if (subscription) {

 sendSubscriptionToServer(subscription);

}
})
.catch(function(e) {
if (Notification.permission === "denied") {

console.warn("Permission for Notification is denied");
pushButton.disabled = true;

} else {
console.error("Unable to subscribe to push", e);
pushButton.disabled = true;
pushButton.textContent = "Enable Push Messages";
}
});
});
}

function unsubscribe() {
pushButton.disabled = true;
navigator.serviceWorker.ready.then(function(serviceWorkerRegistration) {
serviceWorkerRegistration.pushManager
.getSubscription()
.then(function(pushSubscription) {
if (!pushSubscription) {

 isPushEnabled = false;
 pushButton.disabled = false;
 pushButton.textContent = enableText;
 desc.textContent = enableDesc;
 return;

}

var temp = pushSubscription.endpoint.split("/");
var registration_id = temp[temp.length - 1];
deleteSubscriptionToServer(registration_id);

pushSubscription.unsubscribe().then(function(successful) {

 pushButton.disabled = false;
 pushButton.textContent = enableText;
 desc.textContent = enableDesc;
 isPushEnabled = false;

})
.catch(function(e) {

console.error("Error thrown while unsbscribing from push messaging.");

});
});
});
}

About functions are calling these following functions. Ajax calls to store and delete the user's registation ids.

// send subscription id to server
function sendSubscriptionToServer(subscription) {
var temp = subscription.endpoint.split("/");
var registration_id = temp[temp.length - 1];
fetch(

"http://yourwebsite.com/api/insertGCM/" + registration_id,
{
  method: "get"
 }
).then(function(response) {
 return response.json();
});

}

function deleteSubscriptionToServer(rid) {
fetch("https://yourwebsite.com/api/deleteGCM/" + rid, {

method: "get"

}).then(function(response) {
return response.json();
});
}

InsertGCM
PHP code to insert registartion id in GCM table. Alwasy check HTTP_ORIGIN to avoid wrong inputs.

function insertGCM($rid) {
$check = false;
if($_SERVER['HTTP_ORIGIN'] && $_SERVER['HTTP_ORIGIN'] == "http://yourwesbite.com"){
$check = true;
}

if($check){
$db = getDB();
$sql1 = "SELECT * FROM GMC WHERE rid=:rid";
$stmt1 = $db->prepare($sql1);
$stmt1->bindParam("rid", $rid,PDO::PARAM_STR);
$stmt1->execute();
$mainCount=$stmt1->rowCount();
if($mainCount < 1){

  $sql = "INSERT INTO GMC(rid) VALUES (:rid)";
  $stmt = $db->prepare($sql);
  $stmt->bindParam("rid", $rid,PDO::PARAM_STR);
  $stmt->execute();
  echo '{"success":{"text":"done"}}';

}
else{
echo '{"success":{"text":"already users"}}';
}
}
else{
echo '{"error":{"text":"No access"}}';
}
}

Delete
Delete GCM table data based on the registration id.

GetNotification
Get latest notifiaction for service-worker.js

function getNotification(){
$db = getDB();
$sql1 = "SELECT title, msg, logo, url, name FROM notifications ORDER BYnid DESC LIMIT 1";
$stmt1 = $db->prepare($sql1);
$stmt1->execute();
$notification = $stmt1->fetch(PDO::FETCH_OBJ);
$notification->action = $notification->url;
$notification->click_action = $notification->url;
if($notification){

 $notification = json_encode($notification);
 echo '{"data": ' .$notification . '}';

}
}

Administrator for Sending Push Notifications

SendGCM.php
PHP Curl to communcate with Google Firebase APIs. Modify Your_Authorization_API and check Step 6.

<?php
function sendGCM($fields) {
$url = 'https://fcm.googleapis.com/fc...';
$fields = json_encode ($fields);
$headers = array (

'Authorization: key=' . "Your_Authorization_Key",

'Content-Type: application/json'
);
$ch = curl_init ();
curl_setopt ( $ch, CURLOPT_URL, $url );
curl_setopt ( $ch, CURLOPT_POST, true );
curl_setopt ( $ch, CURLOPT_HTTPHEADER, $headers );
curl_setopt ( $ch, CURLOPT_RETURNTRANSFER, true );
curl_setopt ( $ch, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4 );
curl_setopt ( $ch, CURLOPT_POSTFIELDS, $fields );
$result = curl_exec ( $ch );
echo $result;
curl_close ( $ch );
}
?>

Push Notification Form
Simple HTML form with title, message, logo and url inputs. Make sure give some authentication/login to protect this page.

<form autocomplete="off" method="post" action="">
<div>
<label>Title</label>
<input type="text" placeholder="Title" name="title">
</div>
<div >
<label>Message</label>
<input type="text" placeholder="Message" name="msg">
</div>
<div >
<label>Logo</label>
<input type="text" placeholder="Logo" name="logo" value="">
</div>
<div >
<label>Name</label>
<input type="text" placeholder="Name" name="name">
</div>
<div >
<label>URL</label>
<input type="text" placeholder="URL" name="url">
</div>
<div >
<input type="submit" value="Push Notification" name="notificationSubmit"/>
</div>
</form>

home.php
This will insert form data and sending the push notications to registred users by calling $gcm->getIDs()

<?php
include('config.php');
include('sendGMC.php');
if(!empty($_POST['notificationSubmit'])){
$title=$_POST['title'];
$msg=$_POST['msg'];
$logo=$_POST['logo'];
$name=$_POST['name'];
$url=$_POST['url'];
if(strlen(trim($title))>1 && strlen(trim($msg))>1 &&strlen(trim($logo))>1 && strlen(trim($name))>1 && strlen(trim($url))>1 )
{

 if($gcmClass->insertNotification($title, $msg, $logo, $name, $url)){
   $registrationId = $gcmClass->getIDs();
   $total_rids=[];
   foreach($registrationId as $r){
      array_push($total_rids, $r->rid);
   }
$fields = array('registration_ids'  => $total_rids);
sendGCM($fields);
echo "Done";

}
}
}
include('header.php');
?>

gcmClass.php
PHP class for insert notification information and getting all the registration ids.

<?php
class gcmClass
{
public function getIDs()
{
try{

 $db = getDB();
 $stmt = $db->prepare("SELECT rid FROM GMC");
 $stmt->execute();
 $data=$stmt->fetchALL(PDO::FETCH_OBJ);
 return $data;

}
catch(PDOException $e) {
echo '{"error":{"text":'. $e->getMessage() .'}}';
}
}

public function insertNotification($a, $b, $c, $d, $e)
{
try{
$db = getDB();
$stmt = $db->prepare("INSERT INTO notifications(title, msg, logo, name,url) VALUES(:title,:msg,:logo,:name,:url)");
$stmt->bindParam("title", $a,PDO::PARAM_STR) ;
$stmt->bindParam("msg", $b,PDO::PARAM_STR) ;
$stmt->bindParam("logo", $c,PDO::PARAM_STR) ;
$stmt->bindParam("name", $d,PDO::PARAM_STR) ;
$stmt->bindParam("url", $e,PDO::PARAM_STR) ;
$stmt->execute();
return true;
}
catch(PDOException $e) {
echo '{"error":{"text":'. $e->getMessage() .'}}';
}
}
}
?>

config.php
Database configuration file. You have to modify the database username and password.

<?php
/ DATABASE CONFIGURATION /
define('DB_SERVER', 'localhost');
define('DB_USERNAME', 'username');
define('DB_PASSWORD', 'password');
define('DB_DATABASE', 'database');
define("BASE_URL", "https://www.yourwebsite.com/");
define("SITE_KEY", 'yourSecretKeyyx');
function getDB()
{

$dbhost=DB_SERVER;
$dbuser=DB_USERNAME;
$dbpass=DB_PASSWORD;
$dbname=DB_DATABASE;
$dbConnection = new PDO("mysql:host=$dbhost;dbname=$dbname", $dbuser, $dbpass); 
$dbConnection->exec("set names utf8");
$dbConnection->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
return $dbConnection;

}

include('class/gcmClass.php');
$gcmClass = new gcmClass();

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