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/** * This file contains parts adopted from https://github.com/puppeteer/puppeteer/blob/v5.5.0/src/node/Launcher.ts * which is licensed as follows: * * Copyright 2017 Google Inc. All rights reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * *     http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */import {  BrowserWebSocketTransport,  BufReader,  decode,  puppeteer,  resolve,} from "./deps.ts";import type { Browser, Target } from "./deps.ts";import type { AppOptions } from "./types.ts";import { getLocalDataDir } from "./util.ts";
interface LaunchResult {  browser: Browser;  chromeProcess: Deno.Process;}
class ExtendedBrowserWebSocketTransport extends BrowserWebSocketTransport {  #ws: WebSocket;
  constructor(ws: WebSocket) {    super(ws);    this.#ws = ws;  }
  close(): void {    if (this.#ws.readyState === this.#ws.OPEN) {      super.close();    }  }}
export async function launch(  executablePath: string,  headless: boolean,  options: AppOptions,): Promise<LaunchResult> {  const chromeArgs = prepareChromeArgs(executablePath, headless, options);  const chromeProcess = Deno.run({    cmd: chromeArgs,    stderr: "piped",  });  const wsEndpoint = await waitForWSEndpoint(chromeProcess.stderr);  const transport = await ExtendedBrowserWebSocketTransport.create(wsEndpoint);  const browser = await puppeteer.connect({    ignoreHTTPSErrors: true,    transport,  });  await browser.waitForTarget((t: Target) => t.type() === "page");  return {    browser,    chromeProcess,  };}
function prepareChromeArgs(  executablePath: string,  headless: boolean,  options: AppOptions,): string[] {  const chromeArguments = [    executablePath,    // Default arguments    "--disable-background-networking",    "--enable-features=NetworkService,NetworkServiceInProcess",    "--disable-background-timer-throttling",    "--disable-backgrounding-occluded-windows",    "--disable-breakpad",    "--disable-client-side-phishing-detection",    "--disable-component-extensions-with-background-pages",    "--disable-default-apps",    "--disable-dev-shm-usage",    "--disable-extensions",    "--disable-features=TranslateUI",    "--disable-hang-monitor",    "--disable-ipc-flooding-protection",    "--disable-popup-blocking",    "--disable-prompt-on-repost",    "--disable-renderer-backgrounding",    "--disable-sync",    "--force-color-profile=srgb",    "--metrics-recording-only",    "--no-first-run",    "--enable-automation",    "--password-store=basic",    "--use-mock-keychain",    "--enable-blink-features=IdleDetection",  ];  const {    args = [],    userDataDir = null,  } = options;
  if (userDataDir) {    chromeArguments.push(`--user-data-dir=${resolve(userDataDir)}`);  } else {    const localDataDir = options.localDataDir || getLocalDataDir();    chromeArguments.push(`--user-data-dir=${localDataDir}`);  }  if (headless) {    chromeArguments.push("--headless", "--hide-scrollbars", "--mute-audio");  }  if (args.every((arg) => arg.startsWith("-"))) {    chromeArguments.push("about:blank");  }  chromeArguments.push(...args);  chromeArguments.push("--remote-debugging-port=0");
  return chromeArguments;}
async function waitForWSEndpoint(r: Deno.Reader): Promise<string> {  const b = BufReader.create(r);  // TODO Handle timeout  while (true) {    const result = await b.readLine();    if (result === null) {      throw new Error("EOF");    }    const line = decode(result.line);    const match = line.match(/^DevTools listening on (ws:\/\/.*?)\r?$/);    if (match) {      return match[1];    }  }}