flow like the river
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BACK_BACK/node_modules/parcel-bundler/lib/Server.js
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BACK_BACK/node_modules/parcel-bundler/lib/Server.js
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"use strict";
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var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
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var _asyncToGenerator2 = _interopRequireDefault(require("@babel/runtime/helpers/asyncToGenerator"));
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const http = require('http');
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const https = require('https');
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const serveStatic = require('serve-static');
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const getPort = require('get-port');
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const serverErrors = require('./utils/customErrors').serverErrors;
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const generateCertificate = require('./utils/generateCertificate');
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const getCertificate = require('./utils/getCertificate');
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const AnsiToHtml = require('ansi-to-html');
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const logger = require('@parcel/logger');
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const path = require('path');
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const url = require('url');
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const ansiToHtml = new AnsiToHtml({
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newline: true
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});
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serveStatic.mime.define({
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'application/wasm': ['wasm']
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});
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function setHeaders(res) {
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enableCors(res);
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}
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function enableCors(res) {
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res.setHeader('Access-Control-Allow-Origin', '*');
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res.setHeader('Access-Control-Allow-Methods', 'GET, HEAD, PUT, PATCH, POST, DELETE');
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res.setHeader('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept, Content-Type');
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}
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function middleware(bundler) {
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const serve = serveStatic(bundler.options.outDir, {
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index: false,
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redirect: false,
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setHeaders: setHeaders,
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dotfiles: 'allow'
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});
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return function (req, res, next) {
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logAccessIfVerbose(); // Wait for the bundler to finish bundling if needed
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if (bundler.pending) {
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bundler.once('bundled', respond);
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} else {
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respond();
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}
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function respond() {
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let _url$parse = url.parse(req.url),
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pathname = _url$parse.pathname;
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if (bundler.error) {
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return send500(bundler.error);
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} else if (!pathname.startsWith(bundler.options.publicURL) || path.extname(pathname) === '') {
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// If the URL doesn't start with the public path, or the URL doesn't
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// have a file extension, send the main HTML bundle.
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return sendIndex();
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} else {
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// Otherwise, serve the file from the dist folder
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req.url = pathname.slice(bundler.options.publicURL.length);
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return serve(req, res, sendIndex);
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}
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}
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function sendIndex() {
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// If the main asset is an HTML file, serve it
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if (bundler.mainBundle.type === 'html') {
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req.url = `/${path.basename(bundler.mainBundle.name)}`;
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serve(req, res, send404);
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} else {
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send404();
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}
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}
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function send500(error) {
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setHeaders(res);
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res.setHeader('Content-Type', 'text/html; charset=utf-8');
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res.writeHead(500);
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let errorMesssge = '<h1>🚨 Build Error</h1>';
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if (process.env.NODE_ENV === 'production') {
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errorMesssge += '<p><b>Check the console for details.</b></p>';
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} else {
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const _logger$formatError = logger.formatError(error, {
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color: true
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}),
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message = _logger$formatError.message,
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stack = _logger$formatError.stack;
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errorMesssge += `<p><b>${message}</b></p>`;
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if (stack) {
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errorMesssge += `<div style="background: black; padding: 1rem;">${ansiToHtml.toHtml(stack)}</div>`;
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}
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}
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res.end([`<!doctype html>`, `<head><title>🚨 Build Error</title></head>`, `<body style="font-family: monospace; white-space: pre;">${errorMesssge}</body>`].join(''));
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}
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function send404() {
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if (next) {
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return next();
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}
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setHeaders(res);
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res.writeHead(404);
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res.end();
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}
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function logAccessIfVerbose() {
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const protocol = req.connection.encrypted ? 'https' : 'http';
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const fullUrl = `${protocol}://${req.headers.host}${req.url}`;
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logger.verbose(`Request: ${fullUrl}`);
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}
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};
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}
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function serve(_x, _x2, _x3) {
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return _serve.apply(this, arguments);
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}
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function _serve() {
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_serve = (0, _asyncToGenerator2.default)(function* (bundler, port, host, useHTTPS = false) {
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let handler = middleware(bundler);
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let server;
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if (!useHTTPS) {
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server = http.createServer(handler);
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} else if (typeof useHTTPS === 'boolean') {
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server = https.createServer(generateCertificate(bundler.options), handler);
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} else {
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server = https.createServer(yield getCertificate(useHTTPS), handler);
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}
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let freePort = yield getPort({
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port
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});
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server.listen(freePort, host);
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return new Promise((resolve, reject) => {
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server.on('error', err => {
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console.log(err);
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logger.error(new Error(serverErrors(err, server.address().port)));
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reject(err);
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});
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server.once('listening', () => {
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let addon = server.address().port !== port ? `- ${logger.chalk.yellow(`configured port ${port} could not be used.`)}` : '';
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logger.persistent(`Server running at ${logger.chalk.cyan(`${useHTTPS ? 'https' : 'http'}://${host || 'localhost'}:${server.address().port}`)} ${addon}`);
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resolve(server);
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});
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});
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});
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return _serve.apply(this, arguments);
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}
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exports.middleware = middleware;
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exports.serve = serve;
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