NetMesh/electron/plugins/runtime/browserRuntime.mjs

import { startPluginRuntime } from "./runtimePeer.mjs";

function disableDirectBrowserCapability(name) {
  try {
    Object.defineProperty(globalThis, name, {
      configurable: false,
      enumerable: false,
      value: undefined,
      writable: false,
    });
  } catch {
    try { globalThis[name] = undefined; } catch {}
  }
}

function lockDirectBrowserCapabilities() {
  for (const name of [
    "EventSource",
    "RTCPeerConnection",
    "SharedWorker",
    "WebSocket",
    "WebSocketStream",
    "WebTransport",
    "Worker",
    "XMLHttpRequest",
    "fetch",
    "webkitRTCPeerConnection",
  ]) disableDirectBrowserCapability(name);
  try {
    Object.defineProperty(Navigator.prototype, "sendBeacon", {
      configurable: false,
      enumerable: false,
      value: () => false,
      writable: false,
    });
  } catch {}
}

function waitForPort() {
  return new Promise((resolve) => {
    const acceptPort = (event) => {
      if (
        event.data?.type !== "netcatty-plugin:connect"
        || event.data?.runtimeToken !== window.location.hostname
      ) return;
      const port = event.ports?.[0];
      if (!port) return;
      window.removeEventListener("message", acceptPort);
      resolve(port);
    };
    window.addEventListener("message", acceptPort);
    window.postMessage({
      type: "netcatty-plugin:runtime-ready",
      runtimeToken: window.location.hostname,
    }, "*");
  });
}

const [configResponse, port] = await Promise.all([
  fetch(new URL("./config.json", import.meta.url), { cache: "no-store", credentials: "omit" }),
  waitForPort(),
]);
if (!configResponse.ok) throw new Error("Unable to load plugin runtime configuration");
const config = await configResponse.json();
lockDirectBrowserCapabilities();
await startPluginRuntime({
  port,
  config,
  loadPlugin: (entryUrl) => import(entryUrl),
});
window.postMessage({
  type: "netcatty-plugin:runtime-connected",
  runtimeToken: window.location.hostname,
}, "*");