botframework-streaming/lib/utilities/createNodeServer.js

Streaming library for the Microsoft Bot Framework

"use strict";
/**
 * @module botframework-streaming
 */
/**
 * Copyright (c) Microsoft Corporation. All rights reserved.
 * Licensed under the MIT License.
 */
Object.defineProperty(exports, "__esModule", { value: true });
exports.getServerFactory = exports.createNodeServer = void 0;
/**
 * Create a Node 'net' server
 *
 * @param callback Optional connection listener
 * @returns a Node 'net' server instance
 */
function createNodeServer(callback) {
    if (callback && typeof callback !== 'function') {
        throw new TypeError("Invalid callback; callback parameter must be a function to create Node 'net' Server.");
    }
    const server = getServerFactory()(callback);
    if (!isNetServer(server)) {
        throw new Error("Unable to create Node 'net' server");
    }
    return server;
}
exports.createNodeServer = createNodeServer;
/**
 * Get a function that creates a Node 'net' server instance
 *
 * @returns a server factory function
 */
function getServerFactory() {
    if (typeof require !== 'undefined') {
        // eslint-disable-next-line @typescript-eslint/no-require-imports
        return require('net').Server;
    }
    throw TypeError("require is undefined. Must be in a Node module to require 'net' dynamically in order to fetch Server factory.");
}
exports.getServerFactory = getServerFactory;
function isNetServer(o) {
    return hasCloseMethod(o) && hasListenMethod(o);
}
function hasCloseMethod(o) {
    return o.close && typeof o.close === 'function';
}
function hasListenMethod(o) {
    return o.listen && typeof o.listen === 'function';
}
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