chore: add CDN download fallbacks (#14933)

packages/playwright-core/src/server/registry/browserFetcher.ts

@@ -24,17 +24,16 @@ import { debugLogger } from '../../common/debugLogger';
 import { download } from './download';
 import { extract } from '../../zipBundle';
 
-export async function downloadBrowserWithProgressBar(title: string, browserDirectory: string, executablePath: string, downloadURL: string, downloadFileName: string): Promise<boolean> {
+export async function downloadBrowserWithProgressBar(title: string, browserDirectory: string, executablePath: string, downloadURLs: string[], downloadFileName: string): Promise<boolean> {
   if (await existsAsync(browserDirectory)) {
     // Already downloaded.
     debugLogger.log('install', `${title} is already downloaded.`);
     return false;
   }
 
-  const url = downloadURL;
   const zipPath = path.join(os.tmpdir(), downloadFileName);
   try {
-    await download(url, zipPath, {
+    await download(downloadURLs, zipPath, {
       progressBarName: title,
       log: debugLogger.log.bind(debugLogger, 'install'),
       userAgent: getUserAgent(),

packages/playwright-core/src/server/registry/download.ts

@@ -79,7 +79,7 @@ type DownloadOptions = {
 };
 
 export async function download(
-  url: string,
+  urls: string | string[],
   destination: string,
   options: DownloadOptions = {}
 ) {
@@ -88,6 +88,9 @@ export async function download(
     log(
         `downloading ${progressBarName} - attempt #${attempt}`
     );
+    if (!Array.isArray(urls))
+      urls = [urls];
+    const url = urls[(attempt - 1) % urls.length];
     const { error } = await downloadFile(url, destination, {
       progressCallback: getDownloadProgress(progressBarName),
       log,
@@ -99,18 +102,8 @@ export async function download(
     }
     const errorMessage = error?.message || '';
     log(`attempt #${attempt} - ERROR: ${errorMessage}`);
-    if (
+    if (attempt >= retryCount)
-      attempt < retryCount &&
-      (errorMessage.includes('ECONNRESET') ||
-        errorMessage.includes('ETIMEDOUT'))
-    ) {
-      // Maximum default delay is 3rd retry: 1337.5ms
-      const millis = Math.random() * 200 + 250 * Math.pow(1.5, attempt);
-      log(`sleeping ${millis}ms before retry...`);
-      await new Promise(c => setTimeout(c, millis));
-    } else {
       throw error;
-    }
   }
 }
 

packages/playwright-core/src/server/registry/index.ts

@@ -36,6 +36,12 @@ export { writeDockerVersion } from './dependencies';
 const PACKAGE_PATH = path.join(__dirname, '..', '..', '..');
 const BIN_PATH = path.join(__dirname, '..', '..', '..', 'bin');
 
+const PLAYWRIGHT_CDN_MIRRORS = [
+  'https://playwright.azureedge.net',
+  'https://playwright-akamai.azureedge.net',
+  'https://playwright-verizon.azureedge.net',
+];
+
 const EXECUTABLE_PATHS = {
   'chromium': {
     'linux': ['chrome-linux', 'chrome'],
@@ -701,12 +707,12 @@ export class Registry {
       throw new Error(`ERROR: Playwright does not support ${descriptor.name} on ${hostPlatform}`);
     if (hostPlatform === 'generic-linux' || hostPlatform === 'generic-linux-arm64')
       logPolitely('BEWARE: your OS is not officially supported by Playwright; downloading Ubuntu build as a fallback.');
-    const downloadHost =
-        (downloadHostEnv && getFromENV(downloadHostEnv)) ||
-        getFromENV('PLAYWRIGHT_DOWNLOAD_HOST') ||
-        'https://playwright.azureedge.net';
     const downloadPath = util.format(downloadPathTemplate, descriptor.revision);
-    const downloadURL = `${downloadHost}/${downloadPath}`;
+
+    let downloadURLs = PLAYWRIGHT_CDN_MIRRORS.map(mirror => `${mirror}/${downloadPath}`) ;
+    const customHostOverride = (downloadHostEnv && getFromENV(downloadHostEnv)) || getFromENV('PLAYWRIGHT_DOWNLOAD_HOST');
+    if (customHostOverride)
+      downloadURLs = [`${customHostOverride}/${downloadPath}`];
 
     const displayName = descriptor.name.split('-').map(word => {
       return word === 'ffmpeg' ? 'FFMPEG' : word.charAt(0).toUpperCase() + word.slice(1);
@@ -716,7 +722,7 @@ export class Registry {
       : `${displayName} playwright build v${descriptor.revision}`;
 
     const downloadFileName = `playwright-download-${descriptor.name}-${hostPlatform}-${descriptor.revision}.zip`;
-    await downloadBrowserWithProgressBar(title, descriptor.dir, executablePath, downloadURL, downloadFileName).catch(e => {
+    await downloadBrowserWithProgressBar(title, descriptor.dir, executablePath, downloadURLs, downloadFileName).catch(e => {
       throw new Error(`Failed to download ${title}, caused by\n${e.stack}`);
     });
     await fs.promises.writeFile(markerFilePath(descriptor.dir), '');