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web: use single service worker for everything

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This commit is contained in:
Abdullah Atta
2023-09-15 10:23:56 +05:00
parent 1f6d76bac7
commit 0882c3ecf5
5 changed files with 148 additions and 194 deletions
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154
apps/web/public/stream-saver-sw.js
View File

@@ -1,154 +0,0 @@
/*
This file is part of the Notesnook project (https://notesnook.com/)
Copyright (C) 2023 Streetwriters (Private) Limited
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* eslint-disable no-restricted-globals */
self.addEventListener("install", () => {
self.skipWaiting();
});
self.addEventListener("activate", (event) => {
event.waitUntil(self.clients.claim());
});
const map = new Map();
// This should be called once per download
// Each event has a dataChannel that the data will be piped through
self.onmessage = (event) => {
// We send a heartbeat every x second to keep the
// service worker alive if a transferable stream is not sent
if (event.data === "ping") {
return;
}
const data = event.data;
const downloadUrl =
data.url ||
self.registration.scope +
Math.random() +
"/" +
(typeof data === "string" ? data : data.filename);
const port = event.ports[0];
const metadata = new Array(3); // [stream, data, port]
metadata[1] = data;
metadata[2] = port;
if (event.data.transferringReadable) {
port.onmessage = (evt) => {
port.onmessage = null;
metadata[0] = evt.data.readableStream;
};
} else {
metadata[0] = createStream(port);
}
map.set(downloadUrl, metadata);
port.postMessage({ download: downloadUrl });
};
function createStream(port) {
// ReadableStream is only supported by chrome 52
return new ReadableStream({
start(controller) {
// When we receive data on the messageChannel, we write
port.onmessage = ({ data }) => {
if (data === "end") {
return controller.close();
}
if (data === "abort") {
controller.error("Aborted the download");
return;
}
controller.enqueue(data);
};
},
cancel(reason) {
console.log("user aborted", reason);
port.postMessage({ abort: true });
}
});
}
self.onfetch = (event) => {
const url = event.request.url;
// this only works for Firefox
if (url.endsWith("/ping")) {
return event.respondWith(new Response("pong"));
}
const metadata = map.get(url);
if (!metadata) return null;
const [stream, data, port] = metadata;
map.delete(url);
// Not comfortable letting any user control all headers
// so we only copy over the length & disposition
const responseHeaders = new Headers({
"Content-Type": "application/octet-stream; charset=utf-8",
// To be on the safe side, The link can be opened in a iframe.
// but octet-stream should stop it.
"Content-Security-Policy": "default-src 'none'",
"X-Content-Security-Policy": "default-src 'none'",
"X-WebKit-CSP": "default-src 'none'",
"X-XSS-Protection": "1; mode=block"
});
let headers = new Headers(data.headers || {});
if (headers.has("Content-Length")) {
responseHeaders.set("Content-Length", headers.get("Content-Length"));
}
if (headers.has("Content-Disposition")) {
responseHeaders.set(
"Content-Disposition",
headers.get("Content-Disposition")
);
}
// data, data.filename and size should not be used anymore
if (data.size) {
console.warn("Depricated");
responseHeaders.set("Content-Length", data.size);
}
let fileName = typeof data === "string" ? data : data.filename;
if (fileName) {
console.warn("Depricated");
// Make filename RFC5987 compatible
fileName = encodeURIComponent(fileName)
.replace(/['()]/g, escape)
.replace(/\*/g, "%2A");
responseHeaders.set(
"Content-Disposition",
"attachment; filename*=UTF-8''" + fileName
);
}
event.respondWith(new Response(stream, { headers: responseHeaders }));
port.postMessage({ debug: "Download started" });
};

5
apps/web/src/index.tsx
View File

@@ -51,8 +51,6 @@ async function renderApp() {
const serviceWorkerWhitelist: Routes[] = ["default"];
async function initializeServiceWorker() {
if (!IS_DESKTOP_APP) {
await register();
logger.info("Initializing service worker...");
const serviceWorker = await import("./service-worker-registration");
@@ -69,6 +67,9 @@ async function initializeServiceWorker() {
AppEventManager.publish(AppEvents.updateDownloadCompleted, {
version: formatted
});
},
onSuccess(registration) {
register(registration);
}
});
// window.addEventListener("beforeinstallprompt", () => showInstallNotice());

2
apps/web/src/service-worker-registration.ts
View File

@@ -86,9 +86,11 @@ function registerValidSW(
navigator.serviceWorker
.register(swUrl)
.then((registration) => {
if (config.onSuccess) config.onSuccess(registration);
registration.onupdatefound = () => {
const installingWorker = registration.installing;
if (installingWorker == null) {
if (config.onSuccess) config.onSuccess(registration);
return;
}
installingWorker.onstatechange = () => {

124
apps/web/src/service-worker.ts
View File

@@ -80,6 +80,8 @@ registerRoute(
})
);
const downloads = new Map<string, any[]>();
// This allows the web app to trigger skipWaiting via
// registration.waiting.postMessage({type: 'SKIP_WAITING'})
self.addEventListener("message", (event) => {
@@ -87,6 +89,10 @@ self.addEventListener("message", (event) => {
if (!data) return;
switch (data.type) {
// We send a heartbeat every x second to keep the
// service worker alive if a transferable stream is not sent
case "PING":
break;
case "SKIP_WAITING":
self.skipWaiting();
break;
@@ -100,7 +106,125 @@ self.addEventListener("message", (event) => {
});
}
break;
case "REGISTER_DOWNLOAD":
{
console.log("register download", data);
const downloadUrl =
data.url ||
self.registration.scope +
Math.random() +
"/" +
(typeof data === "string" ? data : data.filename);
const port = event.ports[0];
const metadata = new Array(3); // [stream, data, port]
metadata[1] = data;
metadata[2] = port;
if (event.data.transferringReadable) {
port.onmessage = (evt) => {
port.onmessage = null;
metadata[0] = evt.data.readableStream;
};
} else {
metadata[0] = createStream(port);
}
downloads.set(downloadUrl, metadata);
port.postMessage({ download: downloadUrl });
}
break;
default:
break;
}
});
self.addEventListener("fetch", (event) => {
const url = event.request.url;
// this only works for Firefox
if (url.endsWith("/ping")) {
return event.respondWith(new Response("pong"));
}
const metadata = downloads.get(url);
if (!metadata) return null;
const [stream, data, port] = metadata;
downloads.delete(url);
// Not comfortable letting any user control all headers
// so we only copy over the length & disposition
const responseHeaders = new Headers({
"Content-Type": "application/octet-stream; charset=utf-8",
// To be on the safe side, The link can be opened in a iframe.
// but octet-stream should stop it.
"Content-Security-Policy": "default-src 'none'",
"X-Content-Security-Policy": "default-src 'none'",
"X-WebKit-CSP": "default-src 'none'",
"X-XSS-Protection": "1; mode=block"
});
const headers = new Headers(data.headers || {});
if (headers.has("Content-Length")) {
responseHeaders.set("Content-Length", headers.get("Content-Length")!);
}
if (headers.has("Content-Disposition")) {
responseHeaders.set(
"Content-Disposition",
headers.get("Content-Disposition")!
);
}
// data, data.filename and size should not be used anymore
if (data.size) {
console.warn("Depricated");
responseHeaders.set("Content-Length", data.size);
}
let fileName = typeof data === "string" ? data : data.filename;
if (fileName) {
console.warn("Depricated");
// Make filename RFC5987 compatible
fileName = encodeURIComponent(fileName)
.replace(/['()]/g, escape)
.replace(/\*/g, "%2A");
responseHeaders.set(
"Content-Disposition",
"attachment; filename*=UTF-8''" + fileName
);
}
event.respondWith(new Response(stream, { headers: responseHeaders }));
port.postMessage({ debug: "Download started" });
});
function createStream(port: MessagePort) {
// ReadableStream is only supported by chrome 52
return new ReadableStream({
start(controller) {
// When we receive data on the messageChannel, we write
port.onmessage = ({ data }) => {
if (data === "end") {
return controller.close();
}
if (data === "abort") {
controller.error("Aborted the download");
return;
}
controller.enqueue(data);
};
},
cancel(reason) {
console.log("user aborted", reason);
port.postMessage({ abort: true });
}
});
}

57
apps/web/src/utils/stream-saver/mitm.ts
View File

@@ -24,7 +24,7 @@ let keepAlive = () => {
keepAlive = () => {};
const interval = setInterval(() => {
if (sw) {
sw.postMessage("ping");
sw.postMessage({ type: "PING" });
} else {
const ping =
location.href.substr(0, location.href.lastIndexOf("/")) + "/ping";
@@ -36,39 +36,6 @@ let keepAlive = () => {
}, 10000);
};
function registerWorker() {
return navigator.serviceWorker
.getRegistration("./")
.then((swReg) => {
return (
swReg ||
navigator.serviceWorker.register("stream-saver-sw.js", { scope: "./" })
);
})
.then((swReg) => {
console.log("Stream saver service worker registered!");
const swRegTmp = swReg.installing || swReg.waiting;
scope = swReg.scope;
let fn: () => void;
return (
(sw = swReg.active) ||
new Promise((resolve) => {
swRegTmp?.addEventListener(
"statechange",
(fn = () => {
if (swRegTmp.state === "activated") {
swRegTmp.removeEventListener("statechange", fn);
sw = swReg.active;
resolve(undefined);
}
})
);
})
);
});
}
// Now that we have the Service Worker registered we can process messages
export function postMessage(
data: {
@@ -81,6 +48,7 @@ export function postMessage(
},
ports: MessagePort[]
) {
if (!sw) throw new Error("No service worker registered.");
// It's important to have a messageChannel, don't want to interfere
// with other simultaneous downloads
if (!ports || !ports.length) {
@@ -120,19 +88,32 @@ export function postMessage(
// messageChannel.port2 to the service worker. The service worker can
// then use the transferred port to reply via postMessage(), which
// will in turn trigger the onmessage handler on messageChannel.port1.
const transferable = [ports[0]];
if (!data.transferringReadable) {
keepAlive();
}
return sw?.postMessage(data, transferable);
return sw.postMessage({ type: "REGISTER_DOWNLOAD", ...data }, transferable);
}
export async function register() {
if (navigator.serviceWorker) {
await registerWorker();
export async function register(registration: ServiceWorkerRegistration) {
sw = registration.active;
scope = registration.scope;
if (!sw) {
const registrations =
(await navigator.serviceWorker?.getRegistrations()) || [];
for (const registration of registrations) {
if (registration.active) {
sw = registration.active;
scope = registration.scope;
}
}
}
if (sw) console.log("Registered stream saver!");
else console.error("Failed to register stream saver!");
// FF v102 just started to supports transferable streams, but still needs to ping sw.js
// even tough the service worker dose not have to do any kind of work and listen to any
// messages... #305