tenebrous-dicebot/api/node_modules/webpack-dev-server/lib/Server.js

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'use strict';
/* eslint-disable
no-shadow,
no-undefined,
func-names
*/
const fs = require('fs');
const path = require('path');
const tls = require('tls');
const url = require('url');
const http = require('http');
const https = require('https');
const ip = require('ip');
const semver = require('semver');
const killable = require('killable');
const chokidar = require('chokidar');
const express = require('express');
const httpProxyMiddleware = require('http-proxy-middleware');
const historyApiFallback = require('connect-history-api-fallback');
const compress = require('compression');
const serveIndex = require('serve-index');
const webpack = require('webpack');
const webpackDevMiddleware = require('webpack-dev-middleware');
const validateOptions = require('schema-utils');
const isAbsoluteUrl = require('is-absolute-url');
const normalizeOptions = require('./utils/normalizeOptions');
const updateCompiler = require('./utils/updateCompiler');
const createLogger = require('./utils/createLogger');
const getCertificate = require('./utils/getCertificate');
const status = require('./utils/status');
const createDomain = require('./utils/createDomain');
const runBonjour = require('./utils/runBonjour');
const routes = require('./utils/routes');
const getSocketServerImplementation = require('./utils/getSocketServerImplementation');
const schema = require('./options.json');
// Workaround for node ^8.6.0, ^9.0.0
// DEFAULT_ECDH_CURVE is default to prime256v1 in these version
// breaking connection when certificate is not signed with prime256v1
// change it to auto allows OpenSSL to select the curve automatically
// See https://github.com/nodejs/node/issues/16196 for more information
if (semver.satisfies(process.version, '8.6.0 - 9')) {
tls.DEFAULT_ECDH_CURVE = 'auto';
}
if (!process.env.WEBPACK_DEV_SERVER) {
process.env.WEBPACK_DEV_SERVER = true;
}
class Server {
constructor(compiler, options = {}, _log) {
if (options.lazy && !options.filename) {
throw new Error("'filename' option must be set in lazy mode.");
}
validateOptions(schema, options, 'webpack Dev Server');
this.compiler = compiler;
this.options = options;
this.log = _log || createLogger(options);
if (this.options.transportMode !== undefined) {
this.log.warn(
'transportMode is an experimental option, meaning its usage could potentially change without warning'
);
}
normalizeOptions(this.compiler, this.options);
updateCompiler(this.compiler, this.options);
this.heartbeatInterval = 30000;
// this.SocketServerImplementation is a class, so it must be instantiated before use
this.socketServerImplementation = getSocketServerImplementation(
this.options
);
this.originalStats =
this.options.stats && Object.keys(this.options.stats).length
? this.options.stats
: {};
this.sockets = [];
this.contentBaseWatchers = [];
// TODO this.<property> is deprecated (remove them in next major release.) in favor this.options.<property>
this.hot = this.options.hot || this.options.hotOnly;
this.headers = this.options.headers;
this.progress = this.options.progress;
this.serveIndex = this.options.serveIndex;
this.clientOverlay = this.options.overlay;
this.clientLogLevel = this.options.clientLogLevel;
this.publicHost = this.options.public;
this.allowedHosts = this.options.allowedHosts;
this.disableHostCheck = !!this.options.disableHostCheck;
this.watchOptions = options.watchOptions || {};
// Replace leading and trailing slashes to normalize path
this.sockPath = `/${
this.options.sockPath
? this.options.sockPath.replace(/^\/|\/$/g, '')
: 'sockjs-node'
}`;
if (this.progress) {
this.setupProgressPlugin();
}
this.setupHooks();
this.setupApp();
this.setupCheckHostRoute();
this.setupDevMiddleware();
// set express routes
routes(this);
// Keep track of websocket proxies for external websocket upgrade.
this.websocketProxies = [];
this.setupFeatures();
this.setupHttps();
this.createServer();
killable(this.listeningApp);
// Proxy websockets without the initial http request
// https://github.com/chimurai/http-proxy-middleware#external-websocket-upgrade
this.websocketProxies.forEach(function(wsProxy) {
this.listeningApp.on('upgrade', wsProxy.upgrade);
}, this);
}
setupProgressPlugin() {
// for CLI output
new webpack.ProgressPlugin({
profile: !!this.options.profile,
}).apply(this.compiler);
// for browser console output
new webpack.ProgressPlugin((percent, msg, addInfo) => {
percent = Math.floor(percent * 100);
if (percent === 100) {
msg = 'Compilation completed';
}
if (addInfo) {
msg = `${msg} (${addInfo})`;
}
this.sockWrite(this.sockets, 'progress-update', { percent, msg });
if (this.listeningApp) {
this.listeningApp.emit('progress-update', { percent, msg });
}
}).apply(this.compiler);
}
setupApp() {
// Init express server
// eslint-disable-next-line new-cap
this.app = new express();
}
setupHooks() {
// Listening for events
const invalidPlugin = () => {
this.sockWrite(this.sockets, 'invalid');
};
const addHooks = (compiler) => {
const { compile, invalid, done } = compiler.hooks;
compile.tap('webpack-dev-server', invalidPlugin);
invalid.tap('webpack-dev-server', invalidPlugin);
done.tap('webpack-dev-server', (stats) => {
this._sendStats(this.sockets, this.getStats(stats));
this._stats = stats;
});
};
if (this.compiler.compilers) {
this.compiler.compilers.forEach(addHooks);
} else {
addHooks(this.compiler);
}
}
setupCheckHostRoute() {
this.app.all('*', (req, res, next) => {
if (this.checkHost(req.headers)) {
return next();
}
res.send('Invalid Host header');
});
}
setupDevMiddleware() {
// middleware for serving webpack bundle
this.middleware = webpackDevMiddleware(
this.compiler,
Object.assign({}, this.options, { logLevel: this.log.options.level })
);
}
setupCompressFeature() {
this.app.use(compress());
}
setupProxyFeature() {
/**
* Assume a proxy configuration specified as:
* proxy: {
* 'context': { options }
* }
* OR
* proxy: {
* 'context': 'target'
* }
*/
if (!Array.isArray(this.options.proxy)) {
if (Object.prototype.hasOwnProperty.call(this.options.proxy, 'target')) {
this.options.proxy = [this.options.proxy];
} else {
this.options.proxy = Object.keys(this.options.proxy).map((context) => {
let proxyOptions;
// For backwards compatibility reasons.
const correctedContext = context
.replace(/^\*$/, '**')
.replace(/\/\*$/, '');
if (typeof this.options.proxy[context] === 'string') {
proxyOptions = {
context: correctedContext,
target: this.options.proxy[context],
};
} else {
proxyOptions = Object.assign({}, this.options.proxy[context]);
proxyOptions.context = correctedContext;
}
proxyOptions.logLevel = proxyOptions.logLevel || 'warn';
return proxyOptions;
});
}
}
const getProxyMiddleware = (proxyConfig) => {
const context = proxyConfig.context || proxyConfig.path;
// It is possible to use the `bypass` method without a `target`.
// However, the proxy middleware has no use in this case, and will fail to instantiate.
if (proxyConfig.target) {
return httpProxyMiddleware(context, proxyConfig);
}
};
/**
* Assume a proxy configuration specified as:
* proxy: [
* {
* context: ...,
* ...options...
* },
* // or:
* function() {
* return {
* context: ...,
* ...options...
* };
* }
* ]
*/
this.options.proxy.forEach((proxyConfigOrCallback) => {
let proxyMiddleware;
let proxyConfig =
typeof proxyConfigOrCallback === 'function'
? proxyConfigOrCallback()
: proxyConfigOrCallback;
proxyMiddleware = getProxyMiddleware(proxyConfig);
if (proxyConfig.ws) {
this.websocketProxies.push(proxyMiddleware);
}
const handle = (req, res, next) => {
if (typeof proxyConfigOrCallback === 'function') {
const newProxyConfig = proxyConfigOrCallback();
if (newProxyConfig !== proxyConfig) {
proxyConfig = newProxyConfig;
proxyMiddleware = getProxyMiddleware(proxyConfig);
}
}
// - Check if we have a bypass function defined
// - In case the bypass function is defined we'll retrieve the
// bypassUrl from it otherwise bypassUrl would be null
const isByPassFuncDefined = typeof proxyConfig.bypass === 'function';
const bypassUrl = isByPassFuncDefined
? proxyConfig.bypass(req, res, proxyConfig)
: null;
if (typeof bypassUrl === 'boolean') {
// skip the proxy
req.url = null;
next();
} else if (typeof bypassUrl === 'string') {
// byPass to that url
req.url = bypassUrl;
next();
} else if (proxyMiddleware) {
return proxyMiddleware(req, res, next);
} else {
next();
}
};
this.app.use(handle);
// Also forward error requests to the proxy so it can handle them.
this.app.use((error, req, res, next) => handle(req, res, next));
});
}
setupHistoryApiFallbackFeature() {
const fallback =
typeof this.options.historyApiFallback === 'object'
? this.options.historyApiFallback
: null;
// Fall back to /index.html if nothing else matches.
this.app.use(historyApiFallback(fallback));
}
setupStaticFeature() {
const contentBase = this.options.contentBase;
const contentBasePublicPath = this.options.contentBasePublicPath;
if (Array.isArray(contentBase)) {
contentBase.forEach((item, index) => {
let publicPath = contentBasePublicPath;
if (
Array.isArray(contentBasePublicPath) &&
contentBasePublicPath[index]
) {
publicPath = contentBasePublicPath[index] || contentBasePublicPath[0];
}
this.app.use(publicPath, express.static(item));
});
} else if (isAbsoluteUrl(String(contentBase))) {
this.log.warn(
'Using a URL as contentBase is deprecated and will be removed in the next major version. Please use the proxy option instead.'
);
this.log.warn(
'proxy: {\n\t"*": "<your current contentBase configuration>"\n}'
);
// Redirect every request to contentBase
this.app.get('*', (req, res) => {
res.writeHead(302, {
Location: contentBase + req.path + (req._parsedUrl.search || ''),
});
res.end();
});
} else if (typeof contentBase === 'number') {
this.log.warn(
'Using a number as contentBase is deprecated and will be removed in the next major version. Please use the proxy option instead.'
);
this.log.warn(
'proxy: {\n\t"*": "//localhost:<your current contentBase configuration>"\n}'
);
// Redirect every request to the port contentBase
this.app.get('*', (req, res) => {
res.writeHead(302, {
Location: `//localhost:${contentBase}${req.path}${req._parsedUrl
.search || ''}`,
});
res.end();
});
} else {
// route content request
this.app.use(
contentBasePublicPath,
express.static(contentBase, this.options.staticOptions)
);
}
}
setupServeIndexFeature() {
const contentBase = this.options.contentBase;
const contentBasePublicPath = this.options.contentBasePublicPath;
if (Array.isArray(contentBase)) {
contentBase.forEach((item) => {
this.app.use(contentBasePublicPath, (req, res, next) => {
// serve-index doesn't fallthrough non-get/head request to next middleware
if (req.method !== 'GET' && req.method !== 'HEAD') {
return next();
}
serveIndex(item, { icons: true })(req, res, next);
});
});
} else if (
typeof contentBase !== 'number' &&
!isAbsoluteUrl(String(contentBase))
) {
this.app.use(contentBasePublicPath, (req, res, next) => {
// serve-index doesn't fallthrough non-get/head request to next middleware
if (req.method !== 'GET' && req.method !== 'HEAD') {
return next();
}
serveIndex(contentBase, { icons: true })(req, res, next);
});
}
}
setupWatchStaticFeature() {
const contentBase = this.options.contentBase;
if (isAbsoluteUrl(String(contentBase)) || typeof contentBase === 'number') {
throw new Error('Watching remote files is not supported.');
} else if (Array.isArray(contentBase)) {
contentBase.forEach((item) => {
if (isAbsoluteUrl(String(item)) || typeof item === 'number') {
throw new Error('Watching remote files is not supported.');
}
this._watch(item);
});
} else {
this._watch(contentBase);
}
}
setupBeforeFeature() {
// Todo rename onBeforeSetupMiddleware in next major release
// Todo pass only `this` argument
this.options.before(this.app, this, this.compiler);
}
setupMiddleware() {
this.app.use(this.middleware);
}
setupAfterFeature() {
// Todo rename onAfterSetupMiddleware in next major release
// Todo pass only `this` argument
this.options.after(this.app, this, this.compiler);
}
setupHeadersFeature() {
this.app.all('*', this.setContentHeaders.bind(this));
}
setupMagicHtmlFeature() {
this.app.get('*', this.serveMagicHtml.bind(this));
}
setupSetupFeature() {
this.log.warn(
'The `setup` option is deprecated and will be removed in v4. Please update your config to use `before`'
);
this.options.setup(this.app, this);
}
setupFeatures() {
const features = {
compress: () => {
if (this.options.compress) {
this.setupCompressFeature();
}
},
proxy: () => {
if (this.options.proxy) {
this.setupProxyFeature();
}
},
historyApiFallback: () => {
if (this.options.historyApiFallback) {
this.setupHistoryApiFallbackFeature();
}
},
// Todo rename to `static` in future major release
contentBaseFiles: () => {
this.setupStaticFeature();
},
// Todo rename to `serveIndex` in future major release
contentBaseIndex: () => {
this.setupServeIndexFeature();
},
// Todo rename to `watchStatic` in future major release
watchContentBase: () => {
this.setupWatchStaticFeature();
},
before: () => {
if (typeof this.options.before === 'function') {
this.setupBeforeFeature();
}
},
middleware: () => {
// include our middleware to ensure
// it is able to handle '/index.html' request after redirect
this.setupMiddleware();
},
after: () => {
if (typeof this.options.after === 'function') {
this.setupAfterFeature();
}
},
headers: () => {
this.setupHeadersFeature();
},
magicHtml: () => {
this.setupMagicHtmlFeature();
},
setup: () => {
if (typeof this.options.setup === 'function') {
this.setupSetupFeature();
}
},
};
const runnableFeatures = [];
// compress is placed last and uses unshift so that it will be the first middleware used
if (this.options.compress) {
runnableFeatures.push('compress');
}
runnableFeatures.push('setup', 'before', 'headers', 'middleware');
if (this.options.proxy) {
runnableFeatures.push('proxy', 'middleware');
}
if (this.options.contentBase !== false) {
runnableFeatures.push('contentBaseFiles');
}
if (this.options.historyApiFallback) {
runnableFeatures.push('historyApiFallback', 'middleware');
if (this.options.contentBase !== false) {
runnableFeatures.push('contentBaseFiles');
}
}
// checking if it's set to true or not set (Default : undefined => true)
this.serveIndex = this.serveIndex || this.serveIndex === undefined;
if (this.options.contentBase && this.serveIndex) {
runnableFeatures.push('contentBaseIndex');
}
if (this.options.watchContentBase) {
runnableFeatures.push('watchContentBase');
}
runnableFeatures.push('magicHtml');
if (this.options.after) {
runnableFeatures.push('after');
}
(this.options.features || runnableFeatures).forEach((feature) => {
features[feature]();
});
}
setupHttps() {
// if the user enables http2, we can safely enable https
if (this.options.http2 && !this.options.https) {
this.options.https = true;
}
if (this.options.https) {
// for keep supporting CLI parameters
if (typeof this.options.https === 'boolean') {
this.options.https = {
ca: this.options.ca,
pfx: this.options.pfx,
key: this.options.key,
cert: this.options.cert,
passphrase: this.options.pfxPassphrase,
requestCert: this.options.requestCert || false,
};
}
for (const property of ['ca', 'pfx', 'key', 'cert']) {
const value = this.options.https[property];
const isBuffer = value instanceof Buffer;
if (value && !isBuffer) {
let stats = null;
try {
stats = fs.lstatSync(fs.realpathSync(value)).isFile();
} catch (error) {
// ignore error
}
// It is file
this.options.https[property] = stats
? fs.readFileSync(path.resolve(value))
: value;
}
}
let fakeCert;
if (!this.options.https.key || !this.options.https.cert) {
fakeCert = getCertificate(this.log);
}
this.options.https.key = this.options.https.key || fakeCert;
this.options.https.cert = this.options.https.cert || fakeCert;
// note that options.spdy never existed. The user was able
// to set options.https.spdy before, though it was not in the
// docs. Keep options.https.spdy if the user sets it for
// backwards compatibility, but log a deprecation warning.
if (this.options.https.spdy) {
// for backwards compatibility: if options.https.spdy was passed in before,
// it was not altered in any way
this.log.warn(
'Providing custom spdy server options is deprecated and will be removed in the next major version.'
);
} else {
// if the normal https server gets this option, it will not affect it.
this.options.https.spdy = {
protocols: ['h2', 'http/1.1'],
};
}
}
}
createServer() {
if (this.options.https) {
// Only prevent HTTP/2 if http2 is explicitly set to false
const isHttp2 = this.options.http2 !== false;
// `spdy` is effectively unmaintained, and as a consequence of an
// implementation that extensively relies on Nodes non-public APIs, broken
// on Node 10 and above. In those cases, only https will be used for now.
// Once express supports Node's built-in HTTP/2 support, migrating over to
// that should be the best way to go.
// The relevant issues are:
// - https://github.com/nodejs/node/issues/21665
// - https://github.com/webpack/webpack-dev-server/issues/1449
// - https://github.com/expressjs/express/issues/3388
if (semver.gte(process.version, '10.0.0') || !isHttp2) {
if (this.options.http2) {
// the user explicitly requested http2 but is not getting it because
// of the node version.
this.log.warn(
'HTTP/2 is currently unsupported for Node 10.0.0 and above, but will be supported once Express supports it'
);
}
this.listeningApp = https.createServer(this.options.https, this.app);
} else {
// The relevant issues are:
// https://github.com/spdy-http2/node-spdy/issues/350
// https://github.com/webpack/webpack-dev-server/issues/1592
this.listeningApp = require('spdy').createServer(
this.options.https,
this.app
);
}
} else {
this.listeningApp = http.createServer(this.app);
}
this.listeningApp.on('error', (err) => {
this.log.error(err);
});
}
createSocketServer() {
const SocketServerImplementation = this.socketServerImplementation;
this.socketServer = new SocketServerImplementation(this);
this.socketServer.onConnection((connection, headers) => {
if (!connection) {
return;
}
if (!headers) {
this.log.warn(
'transportMode.server implementation must pass headers to the callback of onConnection(f) ' +
'via f(connection, headers) in order for clients to pass a headers security check'
);
}
if (!headers || !this.checkHost(headers) || !this.checkOrigin(headers)) {
this.sockWrite([connection], 'error', 'Invalid Host/Origin header');
this.socketServer.close(connection);
return;
}
this.sockets.push(connection);
this.socketServer.onConnectionClose(connection, () => {
const idx = this.sockets.indexOf(connection);
if (idx >= 0) {
this.sockets.splice(idx, 1);
}
});
if (this.clientLogLevel) {
this.sockWrite([connection], 'log-level', this.clientLogLevel);
}
if (this.hot) {
this.sockWrite([connection], 'hot');
}
// TODO: change condition at major version
if (this.options.liveReload !== false) {
this.sockWrite([connection], 'liveReload', this.options.liveReload);
}
if (this.progress) {
this.sockWrite([connection], 'progress', this.progress);
}
if (this.clientOverlay) {
this.sockWrite([connection], 'overlay', this.clientOverlay);
}
if (!this._stats) {
return;
}
this._sendStats([connection], this.getStats(this._stats), true);
});
}
showStatus() {
const suffix =
this.options.inline !== false || this.options.lazy === true
? '/'
: '/webpack-dev-server/';
const uri = `${createDomain(this.options, this.listeningApp)}${suffix}`;
status(
uri,
this.options,
this.log,
this.options.stats && this.options.stats.colors
);
}
listen(port, hostname, fn) {
this.hostname = hostname;
return this.listeningApp.listen(port, hostname, (err) => {
this.createSocketServer();
if (this.options.bonjour) {
runBonjour(this.options);
}
this.showStatus();
if (fn) {
fn.call(this.listeningApp, err);
}
if (typeof this.options.onListening === 'function') {
this.options.onListening(this);
}
});
}
close(cb) {
this.sockets.forEach((socket) => {
this.socketServer.close(socket);
});
this.sockets = [];
this.contentBaseWatchers.forEach((watcher) => {
watcher.close();
});
this.contentBaseWatchers = [];
this.listeningApp.kill(() => {
this.middleware.close(cb);
});
}
static get DEFAULT_STATS() {
return {
all: false,
hash: true,
assets: true,
warnings: true,
errors: true,
errorDetails: false,
};
}
getStats(statsObj) {
const stats = Server.DEFAULT_STATS;
if (this.originalStats.warningsFilter) {
stats.warningsFilter = this.originalStats.warningsFilter;
}
return statsObj.toJson(stats);
}
use() {
// eslint-disable-next-line
this.app.use.apply(this.app, arguments);
}
setContentHeaders(req, res, next) {
if (this.headers) {
// eslint-disable-next-line
for (const name in this.headers) {
res.setHeader(name, this.headers[name]);
}
}
next();
}
checkHost(headers) {
return this.checkHeaders(headers, 'host');
}
checkOrigin(headers) {
return this.checkHeaders(headers, 'origin');
}
checkHeaders(headers, headerToCheck) {
// allow user to opt-out this security check, at own risk
if (this.disableHostCheck) {
return true;
}
if (!headerToCheck) {
headerToCheck = 'host';
}
// get the Host header and extract hostname
// we don't care about port not matching
const hostHeader = headers[headerToCheck];
if (!hostHeader) {
return false;
}
// use the node url-parser to retrieve the hostname from the host-header.
const hostname = url.parse(
// if hostHeader doesn't have scheme, add // for parsing.
/^(.+:)?\/\//.test(hostHeader) ? hostHeader : `//${hostHeader}`,
false,
true
).hostname;
// always allow requests with explicit IPv4 or IPv6-address.
// A note on IPv6 addresses:
// hostHeader will always contain the brackets denoting
// an IPv6-address in URLs,
// these are removed from the hostname in url.parse(),
// so we have the pure IPv6-address in hostname.
// always allow localhost host, for convenience (hostname === 'localhost')
// allow hostname of listening address (hostname === this.hostname)
const isValidHostname =
ip.isV4Format(hostname) ||
ip.isV6Format(hostname) ||
hostname === 'localhost' ||
hostname === this.hostname;
if (isValidHostname) {
return true;
}
// always allow localhost host, for convenience
// allow if hostname is in allowedHosts
if (this.allowedHosts && this.allowedHosts.length) {
for (let hostIdx = 0; hostIdx < this.allowedHosts.length; hostIdx++) {
const allowedHost = this.allowedHosts[hostIdx];
if (allowedHost === hostname) {
return true;
}
// support "." as a subdomain wildcard
// e.g. ".example.com" will allow "example.com", "www.example.com", "subdomain.example.com", etc
if (allowedHost[0] === '.') {
// "example.com" (hostname === allowedHost.substring(1))
// "*.example.com" (hostname.endsWith(allowedHost))
if (
hostname === allowedHost.substring(1) ||
hostname.endsWith(allowedHost)
) {
return true;
}
}
}
}
// also allow public hostname if provided
if (typeof this.publicHost === 'string') {
const idxPublic = this.publicHost.indexOf(':');
const publicHostname =
idxPublic >= 0 ? this.publicHost.substr(0, idxPublic) : this.publicHost;
if (hostname === publicHostname) {
return true;
}
}
// disallow
return false;
}
// eslint-disable-next-line
sockWrite(sockets, type, data) {
sockets.forEach((socket) => {
this.socketServer.send(socket, JSON.stringify({ type, data }));
});
}
serveMagicHtml(req, res, next) {
const _path = req.path;
try {
const isFile = this.middleware.fileSystem
.statSync(this.middleware.getFilenameFromUrl(`${_path}.js`))
.isFile();
if (!isFile) {
return next();
}
// Serve a page that executes the javascript
const queries = req._parsedUrl.search || '';
const responsePage = `<!DOCTYPE html><html><head><meta charset="utf-8"/></head><body><script type="text/javascript" charset="utf-8" src="${_path}.js${queries}"></script></body></html>`;
res.send(responsePage);
} catch (err) {
return next();
}
}
// send stats to a socket or multiple sockets
_sendStats(sockets, stats, force) {
const shouldEmit =
!force &&
stats &&
(!stats.errors || stats.errors.length === 0) &&
stats.assets &&
stats.assets.every((asset) => !asset.emitted);
if (shouldEmit) {
return this.sockWrite(sockets, 'still-ok');
}
this.sockWrite(sockets, 'hash', stats.hash);
if (stats.errors.length > 0) {
this.sockWrite(sockets, 'errors', stats.errors);
} else if (stats.warnings.length > 0) {
this.sockWrite(sockets, 'warnings', stats.warnings);
} else {
this.sockWrite(sockets, 'ok');
}
}
_watch(watchPath) {
// duplicate the same massaging of options that watchpack performs
// https://github.com/webpack/watchpack/blob/master/lib/DirectoryWatcher.js#L49
// this isn't an elegant solution, but we'll improve it in the future
const usePolling = this.watchOptions.poll ? true : undefined;
const interval =
typeof this.watchOptions.poll === 'number'
? this.watchOptions.poll
: undefined;
const watchOptions = {
ignoreInitial: true,
persistent: true,
followSymlinks: false,
atomic: false,
alwaysStat: true,
ignorePermissionErrors: true,
ignored: this.watchOptions.ignored,
usePolling,
interval,
};
const watcher = chokidar.watch(watchPath, watchOptions);
// disabling refreshing on changing the content
if (this.options.liveReload !== false) {
watcher.on('change', () => {
this.sockWrite(this.sockets, 'content-changed');
});
}
this.contentBaseWatchers.push(watcher);
}
invalidate(callback) {
if (this.middleware) {
this.middleware.invalidate(callback);
}
}
}
// Export this logic,
// so that other implementations,
// like task-runners can use it
Server.addDevServerEntrypoints = require('./utils/addEntries');
module.exports = Server;