51 lines
1.3 KiB
TypeScript
51 lines
1.3 KiB
TypeScript
import { ControllerMessage, WorkerLike, WorkerMessage } from "./types";
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import { Sandbox, System } from "./runtime";
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import { safeRun } from "./util";
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// @ts-ignore
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import sandboxHtml from "bundle-text:./iframe_sandbox.html";
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class IFrameWrapper implements WorkerLike {
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private iframe: HTMLIFrameElement;
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onMessage?: (message: any) => Promise<void>;
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ready: Promise<void>;
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constructor() {
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const iframe = document.createElement("iframe", {});
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this.iframe = iframe;
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iframe.style.display = "none";
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// Let's lock this down significantly
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iframe.setAttribute("sandbox", "allow-scripts");
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iframe.srcdoc = sandboxHtml;
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window.addEventListener("message", (evt: any) => {
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if (evt.source !== iframe.contentWindow) {
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return;
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}
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let data = evt.data;
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if (!data) return;
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safeRun(async () => {
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await this.onMessage!(data);
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});
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});
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document.body.appendChild(iframe);
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this.ready = new Promise((resolve) => {
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iframe.onload = () => {
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resolve();
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iframe.onload = null;
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};
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});
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}
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postMessage(message: any): void {
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this.iframe.contentWindow!.postMessage(message, "*");
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}
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terminate() {
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return this.iframe.remove();
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}
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}
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export function createSandbox(system: System<any>) {
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return new Sandbox(system, new IFrameWrapper());
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}
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