source: frontend/node_modules/webpack/hot/lazy-compilation-node.js

"use strict";

/* global __resourceQuery */

var urlBase = decodeURIComponent(__resourceQuery.slice(1));

/**
 * @param {{ data: string, onError: (err: Error) => void, active: boolean, module: module }} options options
 * @returns {() => void} function to destroy response
 */
exports.keepAlive = function (options) {
        var data = options.data;

        /**
         * @param {Error} err error
         */
        function errorHandler(err) {
                err.message =
                        "Problem communicating active modules to the server: " + err.message;
                options.onError(err);
        }

        /** @type {Promise<import("http") | import("https")>} */
        var mod = require("./load-http")(urlBase.startsWith("https"));

        /** @type {import("http").ClientRequest} */
        var request;
        /** @type {import("http").IncomingMessage} */
        var response;

        mod.then(function (client) {
                request = client.request(
                        urlBase + data,
                        {
                                agent: false,
                                headers: { accept: "text/event-stream" }
                        },
                        function (res) {
                                response = res;
                                response.on("error", errorHandler);

                                if (!options.active && !options.module.hot) {
                                        console.log(
                                                "Hot Module Replacement is not enabled. Waiting for process restart..."
                                        );
                                }
                        }
                );

                request.on("error", errorHandler);
                request.end();
        });

        return function () {
                if (response) {
                        response.destroy();
                }
        };
};

/**
 * @param {string} value new url value
 */
exports.setUrl = function (value) {
        urlBase = value;
};