iOS端Blazor WASM Web Push通知无法生效求助

我按照Blazor Pizza示例完成了Web Push通知的开发，桌面端可以正常接收通知。这里提个注意点：该教程只要求更新service-worker.js，但如果是发布应用，还需要同步更新service-worker.publish.js。

目前我能在iOS上将应用安装为PWA，系统会弹出通知授权提示，也成功获取到了订阅信息：

url - https://web.push.apple.com/QL6zHJz733--fiTROuD0EEGfsi0hhs7RUdZFXzx...
p256dh - BCZ+cL6Fy1BFiBLEgJNs2dbA6YzkSYyS...
auth - HJd1....

我的service-worker.js代码： #

console.log('Installing service worker...');
self.skipWaiting();
});

self.addEventListener('fetch', event => {
    // You can add custom logic here for controlling whether to use cached data if offline, etc.
    // The following line opts out, so requests go directly to the network as usual.
    return null;
});

self.addEventListener('push', event => {
    const payload = event.data.json();
    event.waitUntil(
        self.registration.showNotification('MyApp', {
            body: payload.message,
            icon: 'icon-512.png',
            vibrate: [100, 50, 100],
            data: { url: payload.url }
        })
    );
});

self.addEventListener('notificationclick', event => {
    event.notification.close();
    event.waitUntil(clients.openWindow(event.notification.data.url));
});

我的service-worker.publish.js代码： #

// offline support. See https://aka.ms/blazor-offline-considerations

self.importScripts('./service-worker-assets.js');
self.addEventListener('install', event => event.waitUntil(onInstall(event)));
self.addEventListener('activate', event => event.waitUntil(onActivate(event)));
self.addEventListener('fetch', event => event.respondWith(onFetch(event)));

const cacheNamePrefix = 'offline-cache-';
const cacheName = `${cacheNamePrefix}${self.assetsManifest.version}`;
const offlineAssetsInclude = [ /\.dll$/, /\.pdb$/, /\.wasm/, /\.html/, /\.js$/, /\.json$/, /\.css$/, /\.woff$/, /\.png$/, /\.jpe?g$/, /\.gif$/, /\.ico$/, /\.blat$/, /\.dat$/ ];
const offlineAssetsExclude = [ /^service-worker\.js$/ ];

// Replace with your base path if you are hosting on a subfolder. Ensure there is a trailing '/'.
const base = "/";
const baseUrl = new URL(base, self.origin);
const manifestUrlList = self.assetsManifest.assets.map(asset => new URL(asset.url, baseUrl).href);

async function onInstall(event) {
    console.info('Service worker: Install');

    // Fetch and cache all matching items from the assets manifest
    const assetsRequests = self.assetsManifest.assets
        .filter(asset => offlineAssetsInclude.some(pattern => pattern.test(asset.url)))
        .filter(asset => !offlineAssetsExclude.some(pattern => pattern.test(asset.url)))
        .map(asset => new Request(asset.url, { integrity: asset.hash, cache: 'no-cache' }));
    await caches.open(cacheName).then(cache => cache.addAll(assetsRequests));
}

async function onActivate(event) {
    console.info('Service worker: Activate');

    // Delete unused caches
    const cacheKeys = await caches.keys();
    await Promise.all(cacheKeys
        .filter(key => key.startsWith(cacheNamePrefix) && key !== cacheName)
        .map(key => caches.delete(key)));
}

async function onFetch(event) {
    let cachedResponse = null;
    if (event.request.method === 'GET') {
        // For all navigation requests, try to serve index.html from cache,
        // unless that request is for an offline resource.
        // If you need some URLs to be server-rendered, edit the following check to exclude those URLs
        const shouldServeIndexHtml = event.request.mode === 'navigate'
            && !manifestUrlList.some(url => url === event.request.url);

        const request = shouldServeIndexHtml ? 'index.html' : event.request;
        const cache = await caches.open(cacheName);
        cachedResponse = await cache.match(request);
    }

    return cachedResponse || fetch(event.request);
}

self.addEventListener('push', event => {
    const payload = event.data.json();
    event.waitUntil(
        self.registration.showNotification('MyApp', {
            body: payload.message,
            icon: 'icon-512.png',
            vibrate: [100, 50, 100],
            data: { url: payload.url }
        })
    );
});

self.addEventListener('notificationclick', event => {
    event.notification.close();
    event.waitUntil(clients.openWindow(event.notification.data.url));
});

服务端推送代码（使用web-push-csharp库）： #

var pushSubscription = new PushSubscription(webPushNotification.Url, webPushNotification.P256dh, webPushNotification.Auth);
var vapidDetails = new VapidDetails("mailto:<info@example.com>", publicKey, privateKey);
var webPushClient = new WebPushClient();
try
{
    var payload = JsonConvert.SerializeObject(new
    {
        message = "MyApp Notification",
        url = $"/",
    });
    await webPushClient.SendNotificationAsync(pushSubscription, payload, vapidDetails);
}
catch (Exception ex)
{
    Console.Error.WriteLine("Error sending push notification: " + ex.Message);
}

发送通知时没有报错，但针对https://web.push.apple.com/的订阅始终无法收到通知。有没有人成功实现向该地址推送Web Push通知？

内容的提问来源于stack exchange，提问作者seanmt13