index.js

'use strict';
module.exports = function( config = {} ) {
    if ( config === null || config.constructor !== Object || Object.keys( config ).length === 0 ) {
        throw new Error('A config object must be provided.');
    } else if ( config.free === undefined && config.module === undefined ) {
        throw new Error('You must specify either config.module or config.free.');
    } else if ( config.free === undefined && ( config.username === undefined || config.secret === undefined ) ) {
        throw new Error('Config must provide username and secret or set the free parameter to true.');
    }

    const requestOptions = {
        headers: { 'content-type': 'application/json' },
        hostname: 'api.handsetdetection.com',
        method: config.autoUpdate === true? 'GET' : 'POST',
        path: `/apiv4/${ config.free === true? 'community': 'device' }/${ config.autoUpdate === true? 'fetcharchive' : 'detect' }.json`
    };
    const md5 = ( string )=> require('crypto').createHash('md5').update( string ).digest('hex');
    const HA1 = md5(`${ config.username }:APIv4:${ config.secret }`);
    const HA2 = md5(`${ requestOptions.method }:${ requestOptions.path }`);
    const cnonce = md5( Math.random().toString() );
    const response = md5(`${ HA1 }:APIv4:00000001:${ cnonce }:auth:${ HA2 }`);

    requestOptions.headers.authorization = `Digest username="${ config.username }", realm="APIv4", nonce="APIv4", uri="${ requestOptions.path }", cnonce="${ cnonce }", nc=00000001, qop=auth, response="${ response }", opaque="APIv4"`;

    if ( config.module === 'hosted' && config.autoUpdate === true && require('cluster').isMaster === true ) {
        require('child_process').fork(
            __dirname + '/lib/manageDB.js',
            [ JSON.stringify({ config, requestOptions }) ]
        );
    }

    return require(`${ __dirname }/lib/${ config.module || 'hosted' }.js`)( requestOptions, config.onlyLoad, config.free );
};