|
| 1 | +// Карта каналов для связи с клиентами |
| 2 | +const clientChannels = new Map(); |
| 3 | + |
| 4 | +self.addEventListener('install', event => { |
| 5 | + console.log('Service Worker installing'); |
| 6 | + self.skipWaiting(); |
| 7 | +}); |
| 8 | + |
| 9 | +self.addEventListener('activate', event => { |
| 10 | + console.log('Service Worker activating'); |
| 11 | + event.waitUntil(self.clients.claim()); |
| 12 | +}); |
| 13 | + |
| 14 | +self.addEventListener('fetch', event => { |
| 15 | + const url = new URL(event.request.url); |
| 16 | + const path = url.pathname; |
| 17 | + |
| 18 | + // Игнорируем запросы к другим доменам |
| 19 | + if (url.origin !== location.origin) { |
| 20 | + return; |
| 21 | + } |
| 22 | + |
| 23 | + // Игнорируем запросы к /RunWebBox и сам service worker |
| 24 | + if (path.startsWith('/RunWebBox') || path.includes('sw.js')) { |
| 25 | + return; |
| 26 | + } |
| 27 | + |
| 28 | + // Обрабатываем все остальные запросы через главный поток |
| 29 | + event.respondWith(handleFetchViaMainThread(event)); |
| 30 | +}); |
| 31 | + |
| 32 | +self.addEventListener('message', event => { |
| 33 | + const { type } = event.data; |
| 34 | + const ports = event.ports; |
| 35 | + |
| 36 | + if (type === 'REGISTER_CLIENT' && ports && ports.length > 0) { |
| 37 | + const port = ports[0]; |
| 38 | + const clientId = self.crypto.randomUUID(); |
| 39 | + |
| 40 | + console.log('Registering client:', clientId); |
| 41 | + |
| 42 | + // Сохраняем порт для связи |
| 43 | + clientChannels.set(clientId, port); |
| 44 | + |
| 45 | + // Настраиваем обработчики сообщений |
| 46 | + port.onmessage = msgEvent => { |
| 47 | + const { type, requestId, payload } = msgEvent.data; |
| 48 | + |
| 49 | + if (type === 'FETCH_RESPONSE') { |
| 50 | + // Находим pending promise и разрешаем его |
| 51 | + const pendingRequest = pendingRequests.get(requestId); |
| 52 | + if (pendingRequest) { |
| 53 | + pendingRequest(payload); |
| 54 | + pendingRequests.delete(requestId); |
| 55 | + } |
| 56 | + } |
| 57 | + }; |
| 58 | + |
| 59 | + port.onmessageerror = error => { |
| 60 | + console.error('Message error from client:', error); |
| 61 | + }; |
| 62 | + |
| 63 | + // Удаляем канал при отключении |
| 64 | + port.addEventListener('close', () => { |
| 65 | + clientChannels.delete(clientId); |
| 66 | + }); |
| 67 | + |
| 68 | + // Отправляем подтверждение регистрации |
| 69 | + port.postMessage({ |
| 70 | + type: 'CLIENT_REGISTERED', |
| 71 | + clientId, |
| 72 | + }); |
| 73 | + } |
| 74 | +}); |
| 75 | + |
| 76 | +// Карта ожидающих запросов |
| 77 | +const pendingRequests = new Map(); |
| 78 | + |
| 79 | +async function handleFetchViaMainThread(event) { |
| 80 | + await self.clients.get(event.clientId); |
| 81 | + //if (!client) { |
| 82 | + // return new Response('Client not found', { status: 404 }); |
| 83 | + //} |
| 84 | + |
| 85 | + // Ищем активный канал связи |
| 86 | + const channels = Array.from(clientChannels.entries()); |
| 87 | + if (channels.length === 0) { |
| 88 | + return new Response('No client channels available', { status: 503 }); |
| 89 | + } |
| 90 | + |
| 91 | + // Берем первый доступный канал |
| 92 | + const [clientId, port] = channels.at(-1); |
| 93 | + const requestId = self.crypto.randomUUID(); |
| 94 | + |
| 95 | + return new Promise(resolve => { |
| 96 | + // Сохраняем callback для разрешения promise |
| 97 | + pendingRequests.set(requestId, response => { |
| 98 | + const { response: body, status, headers, error } = response; |
| 99 | + |
| 100 | + if (error) { |
| 101 | + resolve(new Response(error, { status: 500 })); |
| 102 | + return; |
| 103 | + } |
| 104 | + |
| 105 | + resolve( |
| 106 | + new Response(body, { |
| 107 | + status: status || 200, |
| 108 | + headers: { |
| 109 | + 'Content-Type': headers?.contentType || 'text/plain', |
| 110 | + 'Cache-Control': 'no-cache, no-store, must-revalidate', |
| 111 | + }, |
| 112 | + }) |
| 113 | + ); |
| 114 | + }); |
| 115 | + |
| 116 | + // Отправляем запрос в главный поток |
| 117 | + port.postMessage({ |
| 118 | + type: 'FETCH_REQUEST', |
| 119 | + requestId, |
| 120 | + payload: { |
| 121 | + url: event.request.url, |
| 122 | + path: new URL(event.request.url).pathname, |
| 123 | + method: event.request.method, |
| 124 | + }, |
| 125 | + }); |
| 126 | + |
| 127 | + // Таймаут на случай если ответ не придет |
| 128 | + setTimeout(() => { |
| 129 | + if (pendingRequests.has(requestId)) { |
| 130 | + pendingRequests.delete(requestId); |
| 131 | + resolve(new Response('Request timeout', { status: 504 })); |
| 132 | + } |
| 133 | + }, 10000); |
| 134 | + }); |
| 135 | +} |
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