SymphonyElectron/src/app/chrome-flags.ts

import { app, session } from 'electron';

import { logger } from '../common/logger';
import { CloudConfigDataTypes, config, IConfig } from './config-handler';

// Set default flags
logger.info(`chrome-flags: Setting mandatory chrome flags`, { flag: { 'ssl-version-fallback-min': 'tls1.2' } });
app.commandLine.appendSwitch('ssl-version-fallback-min', 'tls1.2');

// Special args that need to be excluded as part of the chrome command line switch
const specialArgs = [ '--url', '--multiInstance', '--userDataPath=', 'symphony://', '--inspect-brk', '--inspect', '--logPath' ];

/**
 * Sets chrome flags
 */
export const setChromeFlags = () => {
    logger.info(`chrome-flags: Checking if we need to set chrome flags!`);

    const flagsConfig = config.getConfigFields(['customFlags', 'disableGpu']) as IConfig;
    const { disableThrottling } = config.getCloudConfigFields([ 'disableThrottling' ]) as any;
    const configFlags: object = {
        'auth-negotiate-delegate-whitelist': flagsConfig.customFlags.authServerWhitelist,
        'auth-server-whitelist': flagsConfig.customFlags.authNegotiateDelegateWhitelist,
        'disable-background-timer-throttling': 'true',
        'disable-d3d11': flagsConfig.disableGpu || null,
        'disable-gpu': flagsConfig.disableGpu || null,
        'disable-gpu-compositing': flagsConfig.disableGpu || null,
    };
    if (flagsConfig.customFlags.disableThrottling === CloudConfigDataTypes.ENABLED || disableThrottling === CloudConfigDataTypes.ENABLED) {
        configFlags['disable-renderer-backgrounding'] = 'true';
    }

    for (const key in configFlags) {
        if (!Object.prototype.hasOwnProperty.call(configFlags, key)) {
            continue;
        }
        const val = configFlags[key];
        if (key && val) {
            logger.info(`chrome-flags: Setting chrome flag for ${key} with value ${val}!`);
            app.commandLine.appendSwitch(key, val);
        }
    }

    const cmdArgs = process.argv;
    cmdArgs.forEach((arg) => {
        // We need to check if the argument key matches the one
        // in the special args array and return if it does match
        const argSplit = arg.split('=');
        const argKey = argSplit[0];
        const argValue = argSplit[1] && arg.substring(arg.indexOf('=') + 1);
        if (arg.startsWith('--') && specialArgs.includes(argKey)) {
            return;
        }

        // All the chrome flags starts with --
        // So, any other arg (like 'electron' or '.')
        // need to be skipped
        if (arg.startsWith('--')) {
            // Since chrome takes values after an equals
            // We split the arg and set it either as
            // just a key, or as a key-value pair
            if (argKey && argValue) {
                app.commandLine.appendSwitch(argKey.substr(2), argValue);
            } else {
                app.commandLine.appendSwitch(argKey);
            }
            logger.info( `Appended chrome command line switch ${argKey} with value ${argValue}`);
        }

    });
};

/**
 * Sets default session properties
 */
export const setSessionProperties = () => {
    logger.info(`chrome-flags: Settings session properties`);
    const { customFlags } = config.getConfigFields([ 'customFlags' ]) as IConfig;

    if (session.defaultSession && customFlags && customFlags.authServerWhitelist && customFlags.authServerWhitelist !== '') {
        session.defaultSession.allowNTLMCredentialsForDomains(customFlags.authServerWhitelist);
    }
};