1 | const http = require('http');
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2 | const https = require('https');
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3 | const serveStatic = require('serve-static');
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4 | const getPort = require('get-port');
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5 | const serverErrors = require('./utils/customErrors').serverErrors;
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6 | const generateCertificate = require('./utils/generateCertificate');
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7 | const getCertificate = require('./utils/getCertificate');
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8 | const AnsiToHtml = require('ansi-to-html');
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9 | const logger = require('@parcel/logger');
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10 | const path = require('path');
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11 | const url = require('url');
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12 |
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13 | const ansiToHtml = new AnsiToHtml({newline: true});
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14 |
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15 | serveStatic.mime.define({
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16 | 'application/wasm': ['wasm']
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17 | });
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18 |
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19 | function setHeaders(res) {
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20 | enableCors(res);
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21 | }
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22 |
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23 | function enableCors(res) {
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24 | res.setHeader('Access-Control-Allow-Origin', '*');
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25 | res.setHeader(
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26 | 'Access-Control-Allow-Methods',
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27 | 'GET, HEAD, PUT, PATCH, POST, DELETE'
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28 | );
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29 | res.setHeader(
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30 | 'Access-Control-Allow-Headers',
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31 | 'Origin, X-Requested-With, Content-Type, Accept, Content-Type'
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32 | );
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33 | }
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34 |
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35 | function middleware(bundler) {
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36 | const serve = serveStatic(bundler.options.outDir, {
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37 | index: false,
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38 | redirect: false,
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39 | setHeaders: setHeaders,
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40 | dotfiles: 'allow'
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41 | });
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42 |
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43 | return function(req, res, next) {
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44 | logAccessIfVerbose();
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45 |
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46 |
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47 | if (bundler.pending) {
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48 | bundler.once('bundled', respond);
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49 | } else {
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50 | respond();
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51 | }
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52 |
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53 | function respond() {
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54 | let {pathname} = url.parse(req.url);
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55 | if (bundler.error) {
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56 | return send500(bundler.error);
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57 | } else if (
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58 | !pathname.startsWith(bundler.options.publicURL) ||
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59 | path.extname(pathname) === ''
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60 | ) {
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61 |
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62 |
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63 | return sendIndex();
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64 | } else {
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65 |
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66 | req.url = pathname.slice(bundler.options.publicURL.length);
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67 | return serve(req, res, sendIndex);
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68 | }
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69 | }
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70 |
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71 | function sendIndex() {
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72 |
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73 | if (bundler.mainBundle.type === 'html') {
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74 | req.url = `/${path.basename(bundler.mainBundle.name)}`;
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75 | serve(req, res, send404);
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76 | } else {
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77 | send404();
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78 | }
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79 | }
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80 |
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81 | function send500(error) {
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82 | setHeaders(res);
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83 | res.setHeader('Content-Type', 'text/html; charset=utf-8');
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84 | res.writeHead(500);
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85 | let errorMesssge = '<h1>🚨 Build Error</h1>';
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86 | if (process.env.NODE_ENV === 'production') {
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87 | errorMesssge += '<p><b>Check the console for details.</b></p>';
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88 | } else {
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89 | const {message, stack} = logger.formatError(error, {color: true});
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90 | errorMesssge += `<p><b>${message}</b></p>`;
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91 | if (stack) {
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92 | errorMesssge += `<div style="background: black; padding: 1rem;">${ansiToHtml.toHtml(
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93 | stack
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94 | )}</div>`;
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95 | }
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96 | }
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97 | res.end(
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98 | [
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99 | `<!doctype html>`,
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100 | `<head><title>🚨 Build Error</title></head>`,
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101 | `<body style="font-family: monospace; white-space: pre;">${errorMesssge}</body>`
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102 | ].join('')
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103 | );
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104 | }
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105 |
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106 | function send404() {
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107 | if (next) {
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108 | return next();
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109 | }
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110 | setHeaders(res);
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111 | res.writeHead(404);
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112 | res.end();
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113 | }
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114 |
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115 | function logAccessIfVerbose() {
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116 | const protocol = req.connection.encrypted ? 'https' : 'http';
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117 | const fullUrl = `${protocol}://${req.headers.host}${req.url}`;
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118 |
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119 | logger.verbose(`Request: ${fullUrl}`);
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120 | }
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121 | };
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122 | }
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123 |
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124 | async function serve(bundler, port, host, useHTTPS = false) {
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125 | let handler = middleware(bundler);
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126 | let server;
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127 | if (!useHTTPS) {
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128 | server = http.createServer(handler);
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129 | } else if (typeof useHTTPS === 'boolean') {
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130 | server = https.createServer(generateCertificate(bundler.options), handler);
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131 | } else {
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132 | server = https.createServer(await getCertificate(useHTTPS), handler);
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133 | }
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134 |
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135 | let freePort = await getPort({port});
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136 | server.listen(freePort, host);
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137 |
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138 | return new Promise((resolve, reject) => {
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139 | server.on('error', err => {
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140 | console.log(err);
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141 | logger.error(new Error(serverErrors(err, server.address().port)));
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142 | reject(err);
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143 | });
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144 |
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145 | server.once('listening', () => {
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146 | let addon =
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147 | server.address().port !== port
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148 | ? `- ${logger.chalk.yellow(
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149 | `configured port ${port} could not be used.`
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150 | )}`
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151 | : '';
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152 |
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153 | logger.persistent(
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154 | `Server running at ${logger.chalk.cyan(
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155 | `${useHTTPS ? 'https' : 'http'}://${host || 'localhost'}:${
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156 | server.address().port
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157 | }`
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158 | )} ${addon}`
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159 | );
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160 |
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161 | resolve(server);
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162 | });
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163 | });
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164 | }
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165 |
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166 | exports.middleware = middleware;
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167 | exports.serve = serve;
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