Gitiles
Code Review Sign In
gerrit.openfyde.cn / chromium.googlesource.com / devtools / devtools-frontend / 6bdb3622bd31e6154d18146a1ac5c322f9e1aa7a / . / scripts / component_server / server.js
blob: af66205107c25eb39f1dc23f2d0b4c1a2c86e17e [file] [log] [blame]
Jack Franklin1557a1c2020-06-08 15:22:13 +0100[diff] [blame]1// Copyright (c) 2020 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5const fs = require('fs');
6const http = require('http');
7const path = require('path');
8const parseURL = require('url').parse;
9const {argv} = require('yargs');
10
11const serverPort = parseInt(process.env.PORT, 10) || 8090;
12
13const target = argv.target || 'Default';
Jack Franklin086ccd52020-11-27 11:00:14 +0000[diff] [blame]14
15/**
16 * When you run npm run components-server we run the script as is from scripts/,
17 * but when this server is run as part of a test suite it's run from
18 * out/Default/gen/scripts, so we have to do a bit of path mangling to figure
19 * out where we are.
20 */
21const isRunningInGen = __dirname.includes(path.join(path.sep, 'gen', path.sep, 'scripts'));
Jack Franklinb36ad7e2020-12-07 10:20:52 +0000[diff] [blame]22
23const pathToBuiltOutTargetDirectory = isRunningInGen ? path.resolve(path.join(__dirname), '..', '..', '..') :
24 path.resolve(path.join(__dirname, '..', '..', 'out', target));
Jack Franklin6bdb3622020-12-22 15:18:46 +0000[diff] [blame^]25const devtoolsRootFolder = path.resolve(path.join(pathToBuiltOutTargetDirectory, 'gen'));
Jack Franklin1557a1c2020-06-08 15:22:13 +0100[diff] [blame]26
Jack Franklin6bdb3622020-12-22 15:18:46 +0000[diff] [blame^]27if (!fs.existsSync(devtoolsRootFolder)) {
28 console.error(`ERROR: Generated front_end folder (${devtoolsRootFolder}) does not exist.`);
Jack Franklin1557a1c2020-06-08 15:22:13 +0100[diff] [blame]29 console.log(
30 'The components server works from the built Ninja output; you may need to run Ninja to update your built DevTools.');
31 console.log('If you build to a target other than default, you need to pass --target=X as an argument');
32 process.exit(1);
33}
34
Jack Franklin086ccd52020-11-27 11:00:14 +0000[diff] [blame]35const server = http.createServer(requestHandler);
36server.listen(serverPort);
37server.once('listening', () => {
38 if (process.send) {
39 process.send(serverPort);
40 }
41 console.log(`Started components server at http://localhost:${serverPort}\n`);
42});
43
44server.once('error', error => {
45 if (process.send) {
46 process.send('ERROR');
47 }
48 throw error;
49});
Jack Franklin1557a1c2020-06-08 15:22:13 +0100[diff] [blame]50
51function createComponentIndexFile(componentPath, componentExamples) {
Jack Franklin6bdb3622020-12-22 15:18:46 +0000[diff] [blame^]52 const componentName = componentPath.replace('/front_end/component_docs/', '').replace(/_/g, ' ');
Jack Franklin1557a1c2020-06-08 15:22:13 +0100[diff] [blame]53 // clang-format off
54 return `<!DOCTYPE html>
55 <html>
56 <head>
57 <meta charset="UTF-8" />
58 <meta name="viewport" content="width=device-width" />
59 <title>DevTools component: ${componentName}</title>
60 <style>
61 h1 { text-transform: capitalize; }
62
63 .example {
64 padding: 5px;
65 margin: 10px;
66 }
67 iframe { display: block; width: 100%; }
68 </style>
69 </head>
70 <body>
71 <h1>${componentName}</h1>
72 ${componentExamples.map(example => {
Jack Franklin6bdb3622020-12-22 15:18:46 +0000[diff] [blame^]73 const fullPath = path.join(componentPath, example);
Jack Franklin1557a1c2020-06-08 15:22:13 +0100[diff] [blame]74 return `<div class="example">
75 <h3><a href="${fullPath}">${example}</a></h3>
76 <iframe src="${fullPath}"></iframe>
77 </div>`;
78 }).join('\n')}
79 </body>
80 </html>`;
81 // clang-format on
82}
83
84function createServerIndexFile(componentNames) {
85 // clang-format off
86 return `<!DOCTYPE html>
87 <html>
88 <head>
89 <meta charset="UTF-8" />
90 <meta name="viewport" content="width=device-width" />
91 <title>DevTools components</title>
92 <style>
Jack Franklinb5997162020-11-25 17:28:51 +0000[diff] [blame]93 a:link, a:visited {
94 color: blue;
95 text-transform: capitalize;
96 text-decoration: none;
97 }
98 a:hover {
99 text-decoration: underline;
100 }
Jack Franklin1557a1c2020-06-08 15:22:13 +0100[diff] [blame]101 </style>
102 </head>
103 <body>
104 <h1>DevTools components</h1>
105 <ul>
106 ${componentNames.map(name => {
Jack Franklinb5997162020-11-25 17:28:51 +0000[diff] [blame]107 const niceName = name.replace(/_/g, ' ');
Jack Franklin6bdb3622020-12-22 15:18:46 +0000[diff] [blame^]108 return `<li><a href='/front_end/component_docs/${name}'>${niceName}</a></li>`;
Jack Franklin1557a1c2020-06-08 15:22:13 +0100[diff] [blame]109 }).join('\n')}
110 </ul>
111 </body>
112 </html>`;
113 // clang-format on
114}
115
116async function getExamplesForPath(filePath) {
Jack Franklin6bdb3622020-12-22 15:18:46 +0000[diff] [blame^]117 const componentDirectory = path.join(devtoolsRootFolder, filePath);
Jack Franklinc1501222020-10-02 09:42:08 +0100[diff] [blame]118 const allFiles = await fs.promises.readdir(componentDirectory);
119 const htmlExampleFiles = allFiles.filter(file => {
120 return path.extname(file) === '.html';
121 });
Jack Franklin1557a1c2020-06-08 15:22:13 +0100[diff] [blame]122
Jack Franklinc1501222020-10-02 09:42:08 +0100[diff] [blame]123 return createComponentIndexFile(filePath, htmlExampleFiles);
Jack Franklin1557a1c2020-06-08 15:22:13 +0100[diff] [blame]124}
125
126function respondWithHtml(response, html) {
127 response.setHeader('Content-Type', 'text/html; charset=utf-8');
128 response.writeHead(200);
129 response.write(html, 'utf8');
130 response.end();
131}
132
133function send404(response, message) {
134 response.writeHead(404);
135 response.write(message, 'utf8');
136 response.end();
137}
138
Jack Franklin279564e2020-07-06 15:25:18 +0100[diff] [blame]139async function checkFileExists(filePath) {
140 try {
141 const errorsAccessingFile = await fs.promises.access(filePath, fs.constants.R_OK);
142 return !errorsAccessingFile;
143 } catch (e) {
144 return false;
145 }
146}
147
Jack Franklin9d4ecf72020-09-16 14:04:30 +0100[diff] [blame]148/**
149 * In Devtools-Frontend we load images without a leading slash, e.g.
150 * url(Images/checker.png). This works within devtools, but breaks this component
Jack Franklin4738bc72020-09-17 09:51:24 +0100[diff] [blame]151 * server as the path ends up as /component_docs/my_component/Images/checker.png.
Jack Franklin9d4ecf72020-09-16 14:04:30 +0100[diff] [blame]152 * So we check if the path ends in Images/*.* and if so, remove anything before
153 * it. Then it will be resolved correctly.
154 */
155function normalizeImagePathIfRequired(filePath) {
156 const imagePathRegex = /\/Images\/(\S+)\.(\w{3})/;
157 const match = imagePathRegex.exec(filePath);
158 if (!match) {
159 return filePath;
160 }
161
162 const [, imageName, imageExt] = match;
Jack Franklin6bdb3622020-12-22 15:18:46 +0000[diff] [blame^]163 const normalizedPath = path.join('front_end', 'Images', `${imageName}.${imageExt}`);
Jack Franklin9d4ecf72020-09-16 14:04:30 +0100[diff] [blame]164 return normalizedPath;
165}
166
Jack Franklin1557a1c2020-06-08 15:22:13 +0100[diff] [blame]167async function requestHandler(request, response) {
168 const filePath = parseURL(request.url).pathname;
Jack Franklin1557a1c2020-06-08 15:22:13 +0100[diff] [blame]169 if (filePath === '/favicon.ico') {
170 send404(response, '404, no favicon');
171 return;
172 }
173
174 if (filePath === '/' || filePath === '/index.html') {
Jack Franklin6bdb3622020-12-22 15:18:46 +0000[diff] [blame^]175 const components = await fs.promises.readdir(path.join(devtoolsRootFolder, 'front_end', 'component_docs'));
Jack Franklinb5997162020-11-25 17:28:51 +0000[diff] [blame]176 const html = createServerIndexFile(components.filter(filePath => {
Jack Franklin6bdb3622020-12-22 15:18:46 +0000[diff] [blame^]177 const stats = fs.lstatSync(path.join(devtoolsRootFolder, 'front_end', 'component_docs', filePath));
Jack Franklinb5997162020-11-25 17:28:51 +0000[diff] [blame]178 // Filter out some build config files (tsconfig, d.ts, etc), and just list the directories.
179 return stats.isDirectory();
180 }));
Jack Franklin1557a1c2020-06-08 15:22:13 +0100[diff] [blame]181 respondWithHtml(response, html);
Jack Franklin6bdb3622020-12-22 15:18:46 +0000[diff] [blame^]182 } else if (filePath.startsWith('/front_end/component_docs') && path.extname(filePath) === '') {
Jack Franklin1557a1c2020-06-08 15:22:13 +0100[diff] [blame]183 // This means it's a component path like /breadcrumbs.
184 const componentHtml = await getExamplesForPath(filePath);
185 respondWithHtml(response, componentHtml);
Jack Franklin36429002020-11-25 15:07:26 +0000[diff] [blame]186 return;
187 } else if (/component_docs\/(.+)\/(.+)\.html/.test(filePath)) {
188 /** This conditional checks if we are viewing an individual example's HTML
Jack Franklin6bdb3622020-12-22 15:18:46 +0000[diff] [blame^]189 * file. e.g. localhost:8090/front_end/component_docs/data_grid/basic.html For each
Jack Franklin36429002020-11-25 15:07:26 +0000[diff] [blame]190 * example we inject themeColors.css into the page so all CSS variables
191 * that components use are available.
192 */
Jack Franklin6bdb3622020-12-22 15:18:46 +0000[diff] [blame^]193 const fileContents = await fs.promises.readFile(path.join(devtoolsRootFolder, filePath), {encoding: 'utf8'});
194 const themeColoursLink = '<link rel="stylesheet" href="/front_end/ui/themeColors.css" type="text/css" />';
195 const toggleDarkModeScript = '<script type="module" src="/front_end/component_docs/component_docs.js"></script>';
Jack Franklin36429002020-11-25 15:07:26 +0000[diff] [blame]196 const newFileContents = fileContents.replace('<style>', themeColoursLink + '\n<style>')
197 .replace('<script', toggleDarkModeScript + '\n<script');
198 respondWithHtml(response, newFileContents);
199
Jack Franklin1557a1c2020-06-08 15:22:13 +0100[diff] [blame]200 } else {
Jack Franklin9d4ecf72020-09-16 14:04:30 +0100[diff] [blame]201 // This means it's an asset like a JS file or an image.
202 const normalizedPath = normalizeImagePathIfRequired(filePath);
Jack Franklin1557a1c2020-06-08 15:22:13 +0100[diff] [blame]203
Jack Franklin6bdb3622020-12-22 15:18:46 +0000[diff] [blame^]204 let fullPath = path.join(devtoolsRootFolder, normalizedPath);
Jack Franklind0345122020-12-21 09:12:04 +0000[diff] [blame]205 if (fullPath.endsWith(path.join('locales', 'en-US.json'))) {
206 // Rewrite this path so we can load up the locale in the component-docs
Jack Franklin6bdb3622020-12-22 15:18:46 +0000[diff] [blame^]207 fullPath = path.join(devtoolsRootFolder, 'front_end', 'i18n', 'locales', 'en-US.json');
Jack Franklind0345122020-12-21 09:12:04 +0000[diff] [blame]208 }
209
Jack Franklin6bdb3622020-12-22 15:18:46 +0000[diff] [blame^]210 if (!fullPath.startsWith(devtoolsRootFolder) && !fileIsInTestFolder) {
Jack Franklin1557a1c2020-06-08 15:22:13 +0100[diff] [blame]211 console.error(`Path ${fullPath} is outside the DevTools Frontend root dir.`);
212 process.exit(1);
213 }
Jack Franklin1557a1c2020-06-08 15:22:13 +0100[diff] [blame]214
Jack Franklin279564e2020-07-06 15:25:18 +0100[diff] [blame]215 const fileExists = await checkFileExists(fullPath);
216
217 if (!fileExists) {
Jack Franklin1557a1c2020-06-08 15:22:13 +0100[diff] [blame]218 send404(response, '404, File not found');
219 return;
220 }
221
222 let encoding = 'utf8';
223 if (fullPath.endsWith('.wasm') || fullPath.endsWith('.png') || fullPath.endsWith('.jpg')) {
224 encoding = 'binary';
225 }
226
227 const fileContents = await fs.promises.readFile(fullPath, encoding);
228
229 encoding = 'utf8';
230 if (fullPath.endsWith('.js')) {
231 response.setHeader('Content-Type', 'text/javascript; charset=utf-8');
232 } else if (fullPath.endsWith('.css')) {
233 response.setHeader('Content-Type', 'text/css; charset=utf-8');
234 } else if (fullPath.endsWith('.wasm')) {
235 response.setHeader('Content-Type', 'application/wasm');
236 encoding = 'binary';
237 } else if (fullPath.endsWith('.svg')) {
238 response.setHeader('Content-Type', 'image/svg+xml; charset=utf-8');
239 } else if (fullPath.endsWith('.png')) {
240 response.setHeader('Content-Type', 'image/png');
241 encoding = 'binary';
242 } else if (fullPath.endsWith('.jpg')) {
243 response.setHeader('Content-Type', 'image/jpg');
244 encoding = 'binary';
245 }
246
247 response.writeHead(200);
248 response.write(fileContents, encoding);
249 response.end();
250 }
251}