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rOACCT/node_modules/react-dev-utils/WebpackDevServerUtils.js
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WebpackDevServerUtils.js
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/**
* Copyright (c) 2015-present, Facebook, Inc.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
'use strict';
const address = require('address');
const fs = require('fs');
const path = require('path');
const url = require('url');
const chalk = require('chalk');
const detect = require('detect-port-alt');
const isRoot = require('is-root');
const prompts = require('prompts');
const clearConsole = require('./clearConsole');
const formatWebpackMessages = require('./formatWebpackMessages');
const getProcessForPort = require('./getProcessForPort');
const forkTsCheckerWebpackPlugin = require('./ForkTsCheckerWebpackPlugin');
const isInteractive = process.stdout.isTTY;
function prepareUrls(protocol, host, port, pathname = '/') {
const formatUrl = hostname =>
url.format({
protocol,
hostname,
port,
pathname,
});
const prettyPrintUrl = hostname =>
url.format({
protocol,
hostname,
port: chalk.bold(port),
pathname,
});
const isUnspecifiedHost = host === '0.0.0.0' || host === '::';
let prettyHost, lanUrlForConfig, lanUrlForTerminal;
if (isUnspecifiedHost) {
prettyHost = 'localhost';
try {
// This can only return an IPv4 address
lanUrlForConfig = address.ip();
if (lanUrlForConfig) {
// Check if the address is a private ip
// https://en.wikipedia.org/wiki/Private_network#Private_IPv4_address_spaces
if (
/^10[.]|^172[.](1[6-9]|2[0-9]|3[0-1])[.]|^192[.]168[.]/.test(
lanUrlForConfig
)
) {
// Address is private, format it for later use
lanUrlForTerminal = prettyPrintUrl(lanUrlForConfig);
} else {
// Address is not private, so we will discard it
lanUrlForConfig = undefined;
}
}
} catch (_e) {
// ignored
}
} else {
prettyHost = host;
}
const localUrlForTerminal = prettyPrintUrl(prettyHost);
const localUrlForBrowser = formatUrl(prettyHost);
return {
lanUrlForConfig,
lanUrlForTerminal,
localUrlForTerminal,
localUrlForBrowser,
};
}
function printInstructions(appName, urls, useYarn) {
console.log();
console.log(`You can now view ${chalk.bold(appName)} in the browser.`);
console.log();
if (urls.lanUrlForTerminal) {
console.log(
` ${chalk.bold('Local:')} ${urls.localUrlForTerminal}`
);
console.log(
` ${chalk.bold('On Your Network:')} ${urls.lanUrlForTerminal}`
);
} else {
console.log(` ${urls.localUrlForTerminal}`);
}
console.log();
console.log('Note that the development build is not optimized.');
console.log(
`To create a production build, use ` +
`${chalk.cyan(`${useYarn ? 'yarn' : 'npm run'} build`)}.`
);
console.log();
}
function createCompiler({
appName,
config,
urls,
useYarn,
useTypeScript,
webpack,
}) {
// "Compiler" is a low-level interface to webpack.
// It lets us listen to some events and provide our own custom messages.
let compiler;
try {
compiler = webpack(config);
} catch (err) {
console.log(chalk.red('Failed to compile.'));
console.log();
console.log(err.message || err);
console.log();
process.exit(1);
}
// "invalid" event fires when you have changed a file, and webpack is
// recompiling a bundle. WebpackDevServer takes care to pause serving the
// bundle, so if you refresh, it'll wait instead of serving the old one.
// "invalid" is short for "bundle invalidated", it doesn't imply any errors.
compiler.hooks.invalid.tap('invalid', () => {
if (isInteractive) {
clearConsole();
}
console.log('Compiling...');
});
let isFirstCompile = true;
let tsMessagesPromise;
if (useTypeScript) {
forkTsCheckerWebpackPlugin
.getCompilerHooks(compiler)
.waiting.tap('awaitingTypeScriptCheck', () => {
console.log(
chalk.yellow(
'Files successfully emitted, waiting for typecheck results...'
)
);
});
}
// "done" event fires when webpack has finished recompiling the bundle.
// Whether or not you have warnings or errors, you will get this event.
compiler.hooks.done.tap('done', async stats => {
if (isInteractive) {
clearConsole();
}
// We have switched off the default webpack output in WebpackDevServer
// options so we are going to "massage" the warnings and errors and present
// them in a readable focused way.
// We only construct the warnings and errors for speed:
// https://github.com/facebook/create-react-app/issues/4492#issuecomment-421959548
const statsData = stats.toJson({
all: false,
warnings: true,
errors: true,
});
const messages = formatWebpackMessages(statsData);
const isSuccessful = !messages.errors.length && !messages.warnings.length;
if (isSuccessful) {
console.log(chalk.green('Compiled successfully!'));
}
if (isSuccessful && (isInteractive || isFirstCompile)) {
printInstructions(appName, urls, useYarn);
}
isFirstCompile = false;
// If errors exist, only show errors.
if (messages.errors.length) {
// Only keep the first error. Others are often indicative
// of the same problem, but confuse the reader with noise.
if (messages.errors.length > 1) {
messages.errors.length = 1;
}
console.log(chalk.red('Failed to compile.\n'));
console.log(messages.errors.join('\n\n'));
return;
}
// Show warnings if no errors were found.
if (messages.warnings.length) {
console.log(chalk.yellow('Compiled with warnings.\n'));
console.log(messages.warnings.join('\n\n'));
// Teach some ESLint tricks.
console.log(
'\nSearch for the ' +
chalk.underline(chalk.yellow('keywords')) +
' to learn more about each warning.'
);
console.log(
'To ignore, add ' +
chalk.cyan('// eslint-disable-next-line') +
' to the line before.\n'
);
}
});
// You can safely remove this after ejecting.
// We only use this block for testing of Create React App itself:
const isSmokeTest = process.argv.some(
arg => arg.indexOf('--smoke-test') > -1
);
if (isSmokeTest) {
compiler.hooks.failed.tap('smokeTest', async () => {
await tsMessagesPromise;
process.exit(1);
});
compiler.hooks.done.tap('smokeTest', async stats => {
await tsMessagesPromise;
if (stats.hasErrors() || stats.hasWarnings()) {
process.exit(1);
} else {
process.exit(0);
}
});
}
return compiler;
}
function resolveLoopback(proxy) {
const o = url.parse(proxy);
o.host = undefined;
if (o.hostname !== 'localhost') {
return proxy;
}
// Unfortunately, many languages (unlike node) do not yet support IPv6.
// This means even though localhost resolves to ::1, the application
// must fall back to IPv4 (on 127.0.0.1).
// We can re-enable this in a few years.
/*try {
o.hostname = address.ipv6() ? '::1' : '127.0.0.1';
} catch (_ignored) {
o.hostname = '127.0.0.1';
}*/
try {
// Check if we're on a network; if we are, chances are we can resolve
// localhost. Otherwise, we can just be safe and assume localhost is
// IPv4 for maximum compatibility.
if (!address.ip()) {
o.hostname = '127.0.0.1';
}
} catch (_ignored) {
o.hostname = '127.0.0.1';
}
return url.format(o);
}
// We need to provide a custom onError function for httpProxyMiddleware.
// It allows us to log custom error messages on the console.
function onProxyError(proxy) {
return (err, req, res) => {
const host = req.headers && req.headers.host;
console.log(
chalk.red('Proxy error:') +
' Could not proxy request ' +
chalk.cyan(req.url) +
' from ' +
chalk.cyan(host) +
' to ' +
chalk.cyan(proxy) +
'.'
);
console.log(
'See https://nodejs.org/api/errors.html#errors_common_system_errors for more information (' +
chalk.cyan(err.code) +
').'
);
console.log();
// And immediately send the proper error response to the client.
// Otherwise, the request will eventually timeout with ERR_EMPTY_RESPONSE on the client side.
if (res.writeHead && !res.headersSent) {
res.writeHead(500);
}
res.end(
'Proxy error: Could not proxy request ' +
req.url +
' from ' +
host +
' to ' +
proxy +
' (' +
err.code +
').'
);
};
}
function prepareProxy(proxy, appPublicFolder, servedPathname) {
// `proxy` lets you specify alternate servers for specific requests.
if (!proxy) {
return undefined;
}
if (typeof proxy !== 'string') {
console.log(
chalk.red('When specified, "proxy" in package.json must be a string.')
);
console.log(
chalk.red('Instead, the type of "proxy" was "' + typeof proxy + '".')
);
console.log(
chalk.red('Either remove "proxy" from package.json, or make it a string.')
);
process.exit(1);
}
// If proxy is specified, let it handle any request except for
// files in the public folder and requests to the WebpackDevServer socket endpoint.
// https://github.com/facebook/create-react-app/issues/6720
const sockPath = process.env.WDS_SOCKET_PATH || '/ws';
const isDefaultSockHost = !process.env.WDS_SOCKET_HOST;
function mayProxy(pathname) {
const maybePublicPath = path.resolve(
appPublicFolder,
pathname.replace(new RegExp('^' + servedPathname), '')
);
const isPublicFileRequest = fs.existsSync(maybePublicPath);
// used by webpackHotDevClient
const isWdsEndpointRequest =
isDefaultSockHost && pathname.startsWith(sockPath);
return !(isPublicFileRequest || isWdsEndpointRequest);
}
if (!/^http(s)?:\/\//.test(proxy)) {
console.log(
chalk.red(
'When "proxy" is specified in package.json it must start with either http:// or https://'
)
);
process.exit(1);
}
let target;
if (process.platform === 'win32') {
target = resolveLoopback(proxy);
} else {
target = proxy;
}
return [
{
target,
logLevel: 'silent',
// For single page apps, we generally want to fallback to /index.html.
// However we also want to respect `proxy` for API calls.
// So if `proxy` is specified as a string, we need to decide which fallback to use.
// We use a heuristic: We want to proxy all the requests that are not meant
// for static assets and as all the requests for static assets will be using
// `GET` method, we can proxy all non-`GET` requests.
// For `GET` requests, if request `accept`s text/html, we pick /index.html.
// Modern browsers include text/html into `accept` header when navigating.
// However API calls like `fetch()` won’t generally accept text/html.
// If this heuristic doesn’t work well for you, use `src/setupProxy.js`.
context: function (pathname, req) {
return (
req.method !== 'GET' ||
(mayProxy(pathname) &&
req.headers.accept &&
req.headers.accept.indexOf('text/html') === -1)
);
},
onProxyReq: proxyReq => {
// Browsers may send Origin headers even with same-origin
// requests. To prevent CORS issues, we have to change
// the Origin to match the target URL.
if (proxyReq.getHeader('origin')) {
proxyReq.setHeader('origin', target);
}
},
onError: onProxyError(target),
secure: false,
changeOrigin: true,
ws: true,
xfwd: true,
},
];
}
function choosePort(host, defaultPort) {
return detect(defaultPort, host).then(
port =>
new Promise(resolve => {
if (port === defaultPort) {
return resolve(port);
}
const message =
process.platform !== 'win32' && defaultPort < 1024 && !isRoot()
? `Admin permissions are required to run a server on a port below 1024.`
: `Something is already running on port ${defaultPort}.`;
if (isInteractive) {
clearConsole();
const existingProcess = getProcessForPort(defaultPort);
const question = {
type: 'confirm',
name: 'shouldChangePort',
message:
chalk.yellow(
message +
`${existingProcess ? ` Probably:\n ${existingProcess}` : ''}`
) + '\n\nWould you like to run the app on another port instead?',
initial: true,
};
prompts(question).then(answer => {
if (answer.shouldChangePort) {
resolve(port);
} else {
resolve(null);
}
});
} else {
console.log(chalk.red(message));
resolve(null);
}
}),
err => {
throw new Error(
chalk.red(`Could not find an open port at ${chalk.bold(host)}.`) +
'\n' +
('Network error message: ' + err.message || err) +
'\n'
);
}
);
}
module.exports = {
choosePort,
createCompiler,
prepareProxy,
prepareUrls,
};
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