/**
* Utility functions for Browser MCP Server
*/
const fs = require('fs');
const os = require('os');
const path = require('path');
// Get version from package.json
let version = 'unknown';
try {
const pkg = JSON.parse(fs.readFileSync(path.join(__dirname, '..', 'package.json'), 'utf8'));
version = pkg.version;
} catch (error) {
// Fallback if package.json cannot be read
}
// Log file location
const logFile = `${os.tmpdir()}/mcp-browser-server.log`;
/**
* Log debug messages to file
* @param {string} msg - Message to log
*/
function debugLog(msg) {
const timestamp = new Date().toISOString();
fs.appendFileSync(logFile, `${timestamp} - ${msg}\n`);
}
// Playwright loading state
let playwright = null;
let playwrightError = null;
let playwrightPath = null;
/**
* Load Playwright from multiple possible sources
* @returns {Object} Playwright module
* @throws {Error} If Playwright cannot be loaded
*/
function loadPlaywright() {
if (playwright) return playwright;
if (playwrightError) throw playwrightError;
const sources = [
{ path: 'playwright', name: 'npm Playwright (local)' },
{ path: `${process.env.HOME}/.cache/ms-playwright-go/1.50.1/package`, name: 'Antigravity Go Playwright' },
{ path: `${process.env.HOME}/.npm-global/lib/node_modules/playwright`, name: 'npm Playwright (global)' }
];
for (const source of sources) {
try {
debugLog(`Trying to load Playwright from: ${source.path}`);
playwright = require(source.path);
playwrightPath = source.path;
debugLog(`✅ Playwright loaded successfully: ${source.name}`);
return playwright;
} catch (error) {
debugLog(`❌ Could not load from ${source.path}: ${error.message}`);
}
}
playwrightError = new Error(
'❌ Playwright is not installed.\n\n' +
'To install Playwright:\n' +
'1. In Antigravity: Click the Chrome logo (top right) to "Open Browser" - this installs Playwright automatically\n' +
'2. Standalone mode: Run:\n' +
' npm install playwright\n' +
' npx playwright install chromium\n\n' +
`Tried locations:\n${sources.map(s => ` - ${s.path}`).join('\n')}`
);
throw playwrightError;
}
/**
* Get the path where Playwright was loaded from
* @returns {string|null} Playwright path or null
*/
function getPlaywrightPath() {
return playwrightPath;
}
/**
* Find Chrome executable in common locations
* @returns {string|null} Path to Chrome executable or null
*/
function findChromeExecutable() {
const { execSync } = require('child_process');
const commonPaths = [
'/usr/bin/google-chrome',
'/usr/bin/google-chrome-stable',
'/usr/bin/chromium',
'/usr/bin/chromium-browser',
'/snap/bin/chromium',
'/Applications/Google Chrome.app/Contents/MacOS/Google Chrome',
'/Applications/Chromium.app/Contents/MacOS/Chromium',
'C:\\Program Files\\Google\\Chrome\\Application\\chrome.exe',
'C:\\Program Files (x86)\\Google\\Chrome\\Application\\chrome.exe'
];
for (const path of commonPaths) {
if (fs.existsSync(path)) {
debugLog(`Found Chrome at: ${path}`);
return path;
}
}
if (process.platform !== 'win32') {
try {
const result = execSync('which google-chrome || which chromium || which chromium-browser', { encoding: 'utf8' }).trim();
if (result && fs.existsSync(result)) {
debugLog(`Found Chrome via 'which': ${result}`);
return result;
}
} catch (e) {
debugLog(`'which' command failed: ${e.message}`);
}
}
debugLog('No system Chrome found');
return null;
}
module.exports = {
debugLog,
loadPlaywright,
getPlaywrightPath,
findChromeExecutable,
logFile,
version
};
