1 // Copyright (C) The Arvados Authors. All rights reserved.
3 // SPDX-License-Identifier: AGPL-3.0
7 const fs = require('fs');
8 const evalSourceMapMiddleware = require('react-dev-utils/evalSourceMapMiddleware');
9 const noopServiceWorkerMiddleware = require('react-dev-utils/noopServiceWorkerMiddleware');
10 const ignoredFiles = require('react-dev-utils/ignoredFiles');
11 const redirectServedPath = require('react-dev-utils/redirectServedPathMiddleware');
12 const paths = require('./paths');
13 const getHttpsConfig = require('./getHttpsConfig');
15 const host = process.env.HOST || '0.0.0.0';
16 const sockHost = process.env.WDS_SOCKET_HOST;
17 const sockPath = process.env.WDS_SOCKET_PATH; // default: '/ws'
18 const sockPort = process.env.WDS_SOCKET_PORT;
20 module.exports = function (proxy, allowedHost) {
21 const disableFirewall =
22 !proxy || process.env.DANGEROUSLY_DISABLE_HOST_CHECK === 'true';
24 // WebpackDevServer 2.4.3 introduced a security fix that prevents remote
25 // websites from potentially accessing local content through DNS rebinding:
26 // https://github.com/webpack/webpack-dev-server/issues/887
27 // https://medium.com/webpack/webpack-dev-server-middleware-security-issues-1489d950874a
28 // However, it made several existing use cases such as development in cloud
29 // environment or subdomains in development significantly more complicated:
30 // https://github.com/facebook/create-react-app/issues/2271
31 // https://github.com/facebook/create-react-app/issues/2233
32 // While we're investigating better solutions, for now we will take a
33 // compromise. Since our WDS configuration only serves files in the `public`
34 // folder we won't consider accessing them a vulnerability. However, if you
35 // use the `proxy` feature, it gets more dangerous because it can expose
36 // remote code execution vulnerabilities in backends like Django and Rails.
37 // So we will disable the host check normally, but enable it if you have
38 // specified the `proxy` setting. Finally, we let you override it if you
39 // really know what you're doing with a special environment variable.
40 // Note: ["localhost", ".localhost"] will support subdomains - but we might
41 // want to allow setting the allowedHosts manually for more complex setups
42 allowedHosts: disableFirewall ? 'all' : [allowedHost],
44 'Access-Control-Allow-Origin': '*',
45 'Access-Control-Allow-Methods': '*',
46 'Access-Control-Allow-Headers': '*',
48 // Enable gzip compression of generated files.
51 // By default WebpackDevServer serves physical files from current directory
52 // in addition to all the virtual build products that it serves from memory.
53 // This is confusing because those files won’t automatically be available in
54 // production build folder unless we copy them. However, copying the whole
55 // project directory is dangerous because we may expose sensitive files.
56 // Instead, we establish a convention that only files in `public` directory
57 // get served. Our build script will copy `public` into the `build` folder.
58 // In `index.html`, you can get URL of `public` folder with %PUBLIC_URL%:
59 // <link rel="icon" href="%PUBLIC_URL%/favicon.ico">
60 // In JavaScript code, you can access it with `process.env.PUBLIC_URL`.
61 // Note that we only recommend to use `public` folder as an escape hatch
62 // for files like `favicon.ico`, `manifest.json`, and libraries that are
63 // for some reason broken when imported through webpack. If you just want to
64 // use an image, put it in `src` and `import` it from JavaScript instead.
65 directory: paths.appPublic,
66 publicPath: [paths.publicUrlOrPath],
67 // By default files from `contentBase` will not trigger a page reload.
69 // Reportedly, this avoids CPU overload on some systems.
70 // https://github.com/facebook/create-react-app/issues/293
71 // src/node_modules is not ignored to support absolute imports
72 // https://github.com/facebook/create-react-app/issues/1065
73 ignored: ignoredFiles(paths.appSrc),
78 // Enable custom sockjs pathname for websocket connection to hot reloading server.
79 // Enable custom sockjs hostname, pathname and port for websocket connection
80 // to hot reloading server.
91 // It is important to tell WebpackDevServer to use the same "publicPath" path as
92 // we specified in the webpack config. When homepage is '.', default to serving
94 // remove last slash so user can land on `/test` instead of `/test/`
95 publicPath: paths.publicUrlOrPath.slice(0, -1),
98 https: getHttpsConfig(),
100 historyApiFallback: {
101 // Paths with dots should still use the history fallback.
102 // See https://github.com/facebook/create-react-app/issues/387.
103 disableDotRule: true,
104 index: paths.publicUrlOrPath,
106 // `proxy` is run between `before` and `after` `webpack-dev-server` hooks
108 onBeforeSetupMiddleware(devServer) {
109 // Keep `evalSourceMapMiddleware`
110 // middlewares before `redirectServedPath` otherwise will not have any effect
111 // This lets us fetch source contents from webpack for the error overlay
112 devServer.app.use(evalSourceMapMiddleware(devServer));
114 if (fs.existsSync(paths.proxySetup)) {
115 // This registers user provided middleware for proxy reasons
116 require(paths.proxySetup)(devServer.app);
119 onAfterSetupMiddleware(devServer) {
120 // Redirect to `PUBLIC_URL` or `homepage` from `package.json` if url not match
121 devServer.app.use(redirectServedPath(paths.publicUrlOrPath));
123 // This service worker file is effectively a 'no-op' that will reset any
124 // previous service worker registered for the same host:port combination.
125 // We do this in development to avoid hitting the production cache if
126 // it used the same host and port.
127 // https://github.com/facebook/create-react-app/issues/2272#issuecomment-302832432
128 devServer.app.use(noopServiceWorkerMiddleware(paths.publicUrlOrPath));