puppeteer-core
Version:
A high-level API to control headless Chrome over the DevTools Protocol
85 lines • 3.27 kB
JavaScript
/**
* @license
* Copyright 2023 Google Inc.
* SPDX-License-Identifier: Apache-2.0
*/
import { _connectToBiDiBrowser } from '../bidi/BrowserConnector.js';
import { _connectToCdpBrowser } from '../cdp/BrowserConnector.js';
import { isNode } from '../environment.js';
import { assert } from '../util/assert.js';
import { isErrorLike } from '../util/ErrorLike.js';
const getWebSocketTransportClass = async () => {
return isNode
? (await import('../node/NodeWebSocketTransport.js')).NodeWebSocketTransport
: (await import('../common/BrowserWebSocketTransport.js'))
.BrowserWebSocketTransport;
};
/**
* Users should never call this directly; it's called when calling
* `puppeteer.connect`. This method attaches Puppeteer to an existing browser instance.
*
* @internal
*/
export async function _connectToBrowser(options) {
const { connectionTransport, endpointUrl } = await getConnectionTransport(options);
if (options.protocol === 'webDriverBiDi') {
const bidiBrowser = await _connectToBiDiBrowser(connectionTransport, endpointUrl, options);
return bidiBrowser;
}
else {
const cdpBrowser = await _connectToCdpBrowser(connectionTransport, endpointUrl, options);
return cdpBrowser;
}
}
/**
* Establishes a websocket connection by given options and returns both transport and
* endpoint url the transport is connected to.
*/
async function getConnectionTransport(options) {
const { browserWSEndpoint, browserURL, transport, headers = {} } = options;
assert(Number(!!browserWSEndpoint) + Number(!!browserURL) + Number(!!transport) ===
1, 'Exactly one of browserWSEndpoint, browserURL or transport must be passed to puppeteer.connect');
if (transport) {
return { connectionTransport: transport, endpointUrl: '' };
}
else if (browserWSEndpoint) {
const WebSocketClass = await getWebSocketTransportClass();
const connectionTransport = await WebSocketClass.create(browserWSEndpoint, headers);
return {
connectionTransport: connectionTransport,
endpointUrl: browserWSEndpoint,
};
}
else if (browserURL) {
const connectionURL = await getWSEndpoint(browserURL);
const WebSocketClass = await getWebSocketTransportClass();
const connectionTransport = await WebSocketClass.create(connectionURL);
return {
connectionTransport: connectionTransport,
endpointUrl: connectionURL,
};
}
throw new Error('Invalid connection options');
}
async function getWSEndpoint(browserURL) {
const endpointURL = new URL('/json/version', browserURL);
try {
const result = await globalThis.fetch(endpointURL.toString(), {
method: 'GET',
});
if (!result.ok) {
throw new Error(`HTTP ${result.statusText}`);
}
const data = await result.json();
return data.webSocketDebuggerUrl;
}
catch (error) {
if (isErrorLike(error)) {
error.message =
`Failed to fetch browser webSocket URL from ${endpointURL}: ` +
error.message;
}
throw error;
}
}
//# sourceMappingURL=BrowserConnector.js.map