Stefan Hacker
74 lines
2.4 KiB
JavaScript
74 lines
2.4 KiB
JavaScript
/* global __webpack_dev_server_client__ */
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import WebSocketClient from "./clients/WebSocketClient.js";
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import { log } from "./utils/log.js";
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/** @typedef {import("./index.js").EXPECTED_ANY} EXPECTED_ANY */
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/** @typedef {import("./clients/SockJSClient")} SockJSClient */
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// this WebsocketClient is here as a default fallback, in case the client is not injected
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/** @type {CommunicationClientConstructor} */
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var Client = typeof __webpack_dev_server_client__ !== "undefined" ? typeof (/** @type {{ default: CommunicationClientConstructor }} */
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__webpack_dev_server_client__.default) !== "undefined" ? /** @type {{ default: CommunicationClientConstructor }} */
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__webpack_dev_server_client__.default : (/** @type {CommunicationClientConstructor} */
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__webpack_dev_server_client__) : WebSocketClient;
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var retries = 0;
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var maxRetries = 10;
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// Initialized client is exported so external consumers can utilize the same instance
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// It is mutable to enforce singleton
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/** @type {CommunicationClient | null} */
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// eslint-disable-next-line import/no-mutable-exports
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export var client = null;
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/** @type {ReturnType<typeof setTimeout> | undefined} */
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var timeout;
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/**
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* @param {string} url url
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* @param {{ [handler: string]: (data?: EXPECTED_ANY, params?: EXPECTED_ANY) => EXPECTED_ANY }} handlers handlers
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* @param {number=} reconnect count of reconnections
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*/
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function socket(url, handlers, reconnect) {
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client = new Client(url);
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client.onOpen(function () {
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retries = 0;
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if (timeout) {
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clearTimeout(timeout);
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}
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if (typeof reconnect !== "undefined") {
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maxRetries = reconnect;
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}
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});
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client.onClose(function () {
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if (retries === 0) {
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handlers.close();
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}
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// Try to reconnect.
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client = null;
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// After 10 retries stop trying, to prevent logspam.
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if (retries < maxRetries) {
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// Exponentially increase timeout to reconnect.
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// Respectfully copied from the package `got`.
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var retryInMs = 1000 * Math.pow(2, retries) + Math.random() * 100;
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retries += 1;
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log.info("Trying to reconnect...");
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timeout = setTimeout(function () {
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socket(url, handlers, reconnect);
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}, retryInMs);
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}
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});
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client.onMessage(
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/**
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* @param {EXPECTED_ANY} data data
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*/
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function (data) {
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var message = JSON.parse(data);
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if (handlers[message.type]) {
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handlers[message.type](message.data, message.params);
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}
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});
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}
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export default socket; |