69 lines
1.4 KiB
JavaScript
69 lines
1.4 KiB
JavaScript
'use strict';
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const http = require('http'),
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logger = require('winston');
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/**
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* Class for creating an http server
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*
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* @param {Express} app - current express instance
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* @param {Number} port - the port to listen on
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*/
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class HttpServer {
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/**
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* Creates an HTTP Server
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*
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* @constructor
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* @param {Express} app - current express instance
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* @param {Number} port - the port to listen on
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*/
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constructor(app, port) {
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let server = http.createServer(app);
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server.listen(port);
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server.on('error', this.onError);
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server.on('listening', () => {
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let addr = server.address();
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let bind = typeof addr === 'string'
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? `pipe ${addr}`
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: `port ${addr.port}`;
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logger.info(`Listening on ${bind}`);
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});
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this.server = server;
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}
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/**
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* Event listener for HTTP server "error" event.
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*
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* @param {Error} error - the error object
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* @return {Null} - Does not return a value
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* @throws {Error}
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*/
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onError(error) {
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if (error.syscall !== 'listen') {
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throw error;
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}
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let port = this.server.address().port;
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let bind = typeof port === 'string'
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? `Pipe ${port}`
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: `Port ${port}`;
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// handle specific listen errors with friendly messages
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switch (error.code) {
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case 'EACCES':
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logger.error(`${bind} requires elevated privileges`);
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process.exit(1);
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break;
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case 'EADDRINUSE':
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logger.error(`${bind} is already in use`);
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process.exit(1);
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break;
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default:
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throw error;
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}
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}
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}
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module.exports = HttpServer; |