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85 lines
2.1 KiB
85 lines
2.1 KiB
4 weeks ago
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const express = require("express");
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const http = require("node:http");
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const { log } = require("../../src/util");
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/**
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* SimpleMigrationServer
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* For displaying the migration status of the server
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* Also, it is used to let Docker healthcheck know the status of the server, as the main server is not started yet, healthcheck will think the server is down incorrectly.
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*/
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class SimpleMigrationServer {
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/**
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* Express app instance
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* @type {?Express}
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*/
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app;
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/**
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* Server instance
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* @type {?Server}
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*/
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server;
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/**
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* Response object
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* @type {?Response}
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*/
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response;
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/**
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* Start the server
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* @param {number} port Port
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* @param {string} hostname Hostname
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* @returns {Promise<void>}
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*/
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start(port, hostname) {
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this.app = express();
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this.server = http.createServer(this.app);
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this.app.get("/", (req, res) => {
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res.set("Content-Type", "text/plain");
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res.write("Migration is in progress, listening message...\n");
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if (this.response) {
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this.response.write("Disconnected\n");
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this.response.end();
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}
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this.response = res;
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// never ending response
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});
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return new Promise((resolve) => {
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this.server.listen(port, hostname, () => {
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if (hostname) {
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log.info("migration", `Migration server is running on http://${hostname}:${port}`);
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} else {
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log.info("migration", `Migration server is running on http://localhost:${port}`);
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}
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resolve();
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});
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});
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}
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/**
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* Update the message
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* @param {string} msg Message to update
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* @returns {void}
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*/
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update(msg) {
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this.response?.write(msg + "\n");
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}
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/**
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* Stop the server
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* @returns {Promise<void>}
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*/
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async stop() {
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this.response?.write("Finished, please refresh this page.\n");
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this.response?.end();
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await this.server?.close();
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}
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}
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module.exports = {
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SimpleMigrationServer,
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};
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