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'use strict';
const path = require('path');
const url = require('url');
const http = require('http');
const https = require('https');
const fs = require('graceful-fs');
const ipaddr = require('ipaddr.js');
const internalIp = require('internal-ip');
const killable = require('killable');
const chokidar = require('chokidar');
const express = require('express');
const { createProxyMiddleware } = 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 getFilenameFromUrl = require('webpack-dev-middleware/dist/utils/getFilenameFromUrl')
.default;
const { validate } = require('schema-utils');
const DevServerPlugin = require('./utils/DevServerPlugin');
const normalizeOptions = require('./utils/normalizeOptions');
const getCertificate = require('./utils/getCertificate');
const colors = require('./utils/colors');
const runOpen = require('./utils/runOpen');
const runBonjour = require('./utils/runBonjour');
const routes = require('./utils/routes');
const getSocketServerImplementation = require('./utils/getSocketServerImplementation');
const getCompilerConfigArray = require('./utils/getCompilerConfigArray');
const getStatsOption = require('./utils/getStatsOption');
const getColorsOption = require('./utils/getColorsOption');
const setupExitSignals = require('./utils/setupExitSignals');
const findPort = require('./utils/findPort');
const schema = require('./options.json');
if (!process.env.WEBPACK_SERVE) {
process.env.WEBPACK_SERVE = true;
}
class Server {
constructor(compiler, options = {}) {
validate(schema, options, 'webpack Dev Server');
this.compiler = compiler;
this.options = options;
this.logger = this.compiler.getInfrastructureLogger('webpack-dev-server');
this.sockets = [];
this.staticWatchers = [];
// Keep track of websocket proxies for external websocket upgrade.
this.websocketProxies = [];
// this value of ws can be overwritten for tests
this.wsHeartbeatInterval = 30000;
normalizeOptions(this.compiler, this.options);
this.applyDevServerPlugin();
this.SocketServerImplementation = getSocketServerImplementation(
this.options
);
if (this.options.client.progress) {
this.setupProgressPlugin();
}
this.setupHooks();
this.setupApp();
this.setupCheckHostRoute();
this.setupDevMiddleware();
// Should be after `webpack-dev-middleware`, otherwise other middlewares might rewrite response
routes(this);
this.setupWatchFiles();
this.setupFeatures();
this.setupHttps();
this.createServer();
killable(this.server);
setupExitSignals(this);
// Proxy WebSocket without the initial http request
// https://github.com/chimurai/http-proxy-middleware#external-websocket-upgrade
// eslint-disable-next-line func-names
this.websocketProxies.forEach(function (wsProxy) {
this.server.on('upgrade', wsProxy.upgrade);
}, this);
}
applyDevServerPlugin() {
const compilers = this.compiler.compilers || [this.compiler];
// eslint-disable-next-line no-shadow
compilers.forEach((compiler) => {
new DevServerPlugin(this.options).apply(compiler);
});
}
setupProgressPlugin() {
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.server) {
this.server.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,
this.options.devMiddleware
);
}
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;
}
const getLogLevelForProxy = (level) => {
if (level === 'none') {
return 'silent';
}
if (level === 'log') {
return 'info';
}
if (level === 'verbose') {
return 'debug';
}
return level;
};
const configs = getCompilerConfigArray(this.compiler);
const configWithDevServer =
configs.find((config) => config.devServer) || configs[0];
proxyOptions.logLevel = getLogLevelForProxy(
configWithDevServer.infrastructureLogging.level
);
proxyOptions.logProvider = () => this.logger;
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 createProxyMiddleware(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 = async (req, res, next) => {
if (typeof proxyConfigOrCallback === 'function') {
const newProxyConfig = proxyConfigOrCallback(req, res, next);
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
? await 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() {
this.options.static.forEach((staticOption) => {
staticOption.publicPath.forEach((publicPath) => {
this.app.use(
publicPath,
express.static(staticOption.directory, staticOption.staticOptions)
);
});
});
}
setupStaticServeIndexFeature() {
this.options.static.forEach((staticOption) => {
staticOption.publicPath.forEach((publicPath) => {
if (staticOption.serveIndex) {
this.app.use(publicPath, (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(staticOption.directory, staticOption.serveIndex)(
req,
res,
next
);
});
}
});
});
}
setupStaticWatchFeature() {
this.options.static.forEach((staticOption) => {
if (staticOption.watch) {
this.watchFiles(staticOption.directory, staticOption.watch);
}
});
}
setupOnBeforeSetupMiddlewareFeature() {
this.options.onBeforeSetupMiddleware(this);
}
setupWatchFiles() {
if (this.options.watchFiles) {
const { watchFiles } = this.options;
if (typeof watchFiles === 'string') {
this.watchFiles(watchFiles, {});
} else if (Array.isArray(watchFiles)) {
watchFiles.forEach((file) => {
if (typeof file === 'string') {
this.watchFiles(file, {});
} else {
this.watchFiles(file.paths, file.options || {});
}
});
} else {
// { paths: [...], options: {} }
this.watchFiles(watchFiles.paths, watchFiles.options || {});
}
}
}
setupMiddleware() {
this.app.use(this.middleware);
}
setupOnAfterSetupMiddlewareFeature() {
this.options.onAfterSetupMiddleware(this);
}
setupHeadersFeature() {
this.app.all('*', this.setContentHeaders.bind(this));
}
setupMagicHtmlFeature() {
this.app.get('*', this.serveMagicHtml.bind(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();
}
},
static: () => {
this.setupStaticFeature();
},
staticServeIndex: () => {
this.setupStaticServeIndexFeature();
},
staticWatch: () => {
this.setupStaticWatchFeature();
},
onBeforeSetupMiddleware: () => {
if (typeof this.options.onBeforeSetupMiddleware === 'function') {
this.setupOnBeforeSetupMiddlewareFeature();
}
},
onAfterSetupMiddleware: () => {
if (typeof this.options.onAfterSetupMiddleware === 'function') {
this.setupOnAfterSetupMiddlewareFeature();
}
},
middleware: () => {
// include our middleware to ensure
// it is able to handle '/index.html' request after redirect
this.setupMiddleware();
},
headers: () => {
this.setupHeadersFeature();
},
magicHtml: () => {
this.setupMagicHtmlFeature();
},
};
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');
}
if (this.options.onBeforeSetupMiddleware) {
runnableFeatures.push('onBeforeSetupMiddleware');
}
runnableFeatures.push('headers', 'middleware');
if (this.options.proxy) {
runnableFeatures.push('proxy', 'middleware');
}
if (this.options.static) {
runnableFeatures.push('static');
}
if (this.options.historyApiFallback) {
runnableFeatures.push('historyApiFallback', 'middleware');
if (this.options.static) {
runnableFeatures.push('static');
}
}
if (this.options.static) {
runnableFeatures.push('staticServeIndex', 'staticWatch');
}
runnableFeatures.push('magicHtml');
if (this.options.onAfterSetupMiddleware) {
runnableFeatures.push('onAfterSetupMiddleware');
}
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
) {
this.options.https = {
requestCert: false,
};
}
if (this.options.https) {
for (const property of ['cacert', '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.logger);
}
this.options.https.key = this.options.https.key || fakeCert;
this.options.https.cert = this.options.https.cert || fakeCert;
}
}
createServer() {
if (this.options.https) {
if (this.options.http2) {
// TODO: we need to replace spdy with http2 which is an internal module
this.server = require('spdy').createServer(
{
...this.options.https,
spdy: {
protocols: ['h2', 'http/1.1'],
},
},
this.app
);
} else {
this.server = https.createServer(this.options.https, this.app);
}
} else {
this.server = http.createServer(this.app);
}
this.server.on('error', (error) => {
throw error;
});
}
createSocketServer() {
this.socketServer = new this.SocketServerImplementation(this);
this.socketServer.onConnection((connection, headers) => {
if (!connection) {
return;
}
if (!headers) {
this.logger.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.options.hot === true || this.options.hot === 'only') {
this.sockWrite([connection], 'hot');
}
if (this.options.liveReload) {
this.sockWrite([connection], 'liveReload');
}
if (this.options.client.progress) {
this.sockWrite([connection], 'progress', this.options.client.progress);
}
if (this.options.client.overlay) {
this.sockWrite([connection], 'overlay', this.options.client.overlay);
}
if (!this.stats) {
return;
}
this.sendStats([connection], this.getStats(this.stats), true);
});
}
showStatus() {
const useColor = getColorsOption(getCompilerConfigArray(this.compiler));
const protocol = this.options.https ? 'https' : 'http';
const { address, port } = this.server.address();
const prettyPrintUrl = (newHostname) =>
url.format({ protocol, hostname: newHostname, port, pathname: '/' });
let server;
let localhost;
let loopbackIPv4;
let loopbackIPv6;
let networkUrlIPv4;
let networkUrlIPv6;
if (this.hostname) {
if (this.hostname === 'localhost') {
localhost = prettyPrintUrl('localhost');
} else {
let isIP;
try {
isIP = ipaddr.parse(this.hostname);
} catch (error) {
// Ignore
}
if (!isIP) {
server = prettyPrintUrl(this.hostname);
}
}
}
const parsedIP = ipaddr.parse(address);
if (parsedIP.range() === 'unspecified') {
localhost = prettyPrintUrl('localhost');
const networkIPv4 = internalIp.v4.sync();
if (networkIPv4) {
networkUrlIPv4 = prettyPrintUrl(networkIPv4);
}
const networkIPv6 = internalIp.v6.sync();
if (networkIPv6) {
networkUrlIPv6 = prettyPrintUrl(networkIPv6);
}
} else if (parsedIP.range() === 'loopback') {
if (parsedIP.kind() === 'ipv4') {
loopbackIPv4 = prettyPrintUrl(parsedIP.toString());
} else if (parsedIP.kind() === 'ipv6') {
loopbackIPv6 = prettyPrintUrl(parsedIP.toString());
}
} else {
networkUrlIPv4 =
parsedIP.kind() === 'ipv6' && parsedIP.isIPv4MappedAddress()
? prettyPrintUrl(parsedIP.toIPv4Address().toString())
: prettyPrintUrl(address);
if (parsedIP.kind() === 'ipv6') {
networkUrlIPv6 = prettyPrintUrl(address);
}
}
this.logger.info('Project is running at:');
if (server) {
this.logger.info(`Server: ${colors.info(useColor, server)}`);
}
if (localhost || loopbackIPv4 || loopbackIPv6) {
const loopbacks = []
.concat(localhost ? [colors.info(useColor, localhost)] : [])
.concat(loopbackIPv4 ? [colors.info(useColor, loopbackIPv4)] : [])
.concat(loopbackIPv6 ? [colors.info(useColor, loopbackIPv6)] : []);
this.logger.info(`Loopback: ${loopbacks.join(', ')}`);
}
if (networkUrlIPv4) {
this.logger.info(
`On Your Network (IPv4): ${colors.info(useColor, networkUrlIPv4)}`
);
}
if (networkUrlIPv6) {
this.logger.info(
`On Your Network (IPv6): ${colors.info(useColor, networkUrlIPv6)}`
);
}
if (this.options.static && this.options.static.length > 0) {
this.logger.info(
`Content not from webpack is served from '${colors.info(
useColor,
this.options.static
.map((staticOption) => staticOption.directory)
.join(', ')
)}' directory`
);
}
if (this.options.historyApiFallback) {
this.logger.info(
`404s will fallback to '${colors.info(
useColor,
this.options.historyApiFallback.index || '/index.html'
)}'`
);
}
if (this.options.bonjour) {
const protocol =
this.options.bonjour.type || this.options.https ? 'https' : 'http';
this.logger.info(
`Broadcasting "${protocol}" with subtype of "webpack" via ZeroConf DNS (Bonjour)`
);
}
if (this.options.open) {
const openTarget = prettyPrintUrl(this.hostname || 'localhost');
runOpen(openTarget, this.options.open, this.logger);
}
}
listen(port, hostname, fn) {
if (hostname === 'local-ip') {
this.hostname = internalIp.v4.sync() || internalIp.v6.sync() || '0.0.0.0';
} else if (hostname === 'local-ipv4') {
this.hostname = internalIp.v4.sync() || '0.0.0.0';
} else if (hostname === 'local-ipv6') {
this.hostname = internalIp.v6.sync() || '::';
} else {
this.hostname = hostname;
}
if (typeof port !== 'undefined' && port !== this.options.port) {
this.logger.warn(
'The port specified in options and the port passed as an argument is different.'
);
}
return (
findPort(port || this.options.port)
// eslint-disable-next-line no-shadow
.then((port) => {
this.port = port;
return this.server.listen(port, this.hostname, (error) => {
if (this.options.hot || this.options.liveReload) {
this.createSocketServer();
}
if (this.options.bonjour) {
runBonjour(this.options);
}
this.showStatus();
if (fn) {
fn.call(this.server, error);
}
if (typeof this.options.onListening === 'function') {
this.options.onListening(this);
}
});
})
.catch((error) => {
if (fn) {
fn.call(this.server, error);
}
})
);
}
close(cb) {
this.sockets.forEach((socket) => {
this.socketServer.close(socket);
});
this.sockets = [];
const prom = Promise.all(
this.staticWatchers.map((watcher) => watcher.close())
);
this.staticWatchers = [];
this.server.kill(() => {
// watchers must be closed before closing middleware
prom.then(() => {
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;
const configArr = getCompilerConfigArray(this.compiler);
const statsOption = getStatsOption(configArr);
if (typeof statsOption === 'object' && statsOption.warningsFilter) {
stats.warningsFilter = statsOption.warningsFilter;
}
return statsObj.toJson(stats);
}
use() {
// eslint-disable-next-line prefer-spread
this.app.use.apply(this.app, arguments);
}
setContentHeaders(req, res, next) {
if (this.options.headers) {
// eslint-disable-next-line guard-for-in
for (const name in this.options.headers) {
res.setHeader(name, this.options.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 of this security check, at their own risk
// by explicitly disabling firewall
if (!this.options.firewall) {
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 : `//${hostHeader}`,
false,
true
).hostname;
// always allow requests with explicit IPv4 or IPv6-address.
// A note on IPv6 addresses:
// hostHeader will always contain the brackets denoting
// an IPv6-address in URLs,
// these are removed from the hostname in url.parse(),
// so we have the pure IPv6-address in hostname.
// always allow localhost host, for convenience (hostname === 'localhost')
// allow hostname of listening address (hostname === this.hostname)
const isValidHostname =
ipaddr.IPv4.isValid(hostname) ||
ipaddr.IPv6.isValid(hostname) ||
hostname === 'localhost' ||
hostname === this.hostname;
if (isValidHostname) {
return true;
}
const allowedHosts = this.options.firewall;
// always allow localhost host, for convenience
// allow if hostname is in allowedHosts
if (Array.isArray(allowedHosts) && allowedHosts.length) {
for (let hostIdx = 0; hostIdx < allowedHosts.length; hostIdx++) {
const allowedHost = allowedHosts[hostIdx];
if (allowedHost === hostname) {
return true;
}
// support "." as a subdomain wildcard
// e.g. ".example.com" will allow "example.com", "www.example.com", "subdomain.example.com", etc
if (allowedHost[0] === '.') {
// "example.com" (hostname === allowedHost.substring(1))
// "*.example.com" (hostname.endsWith(allowedHost))
if (
hostname === allowedHost.substring(1) ||
hostname.endsWith(allowedHost)
) {
return true;
}
}
}
}
// also allow public hostname if provided
if (typeof this.options.public === 'string') {
const idxPublic = this.options.public.indexOf(':');
const publicHostname =
idxPublic >= 0
? this.options.public.substr(0, idxPublic)
: this.options.public;
if (hostname === publicHostname) {
return true;
}
}
// disallow
return false;
}
sockWrite(sockets, type, data) {
sockets.forEach((socket) => {
this.socketServer.send(socket, JSON.stringify({ type, data }));
});
}
serveMagicHtml(req, res, next) {
const _path = req.path;
try {
const filename = getFilenameFromUrl(
this.middleware.context,
`${_path}.js`
);
const isFile = this.middleware.context.outputFileSystem
.statSync(filename)
.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 (error) {
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.warnings || stats.warnings.length === 0) &&
stats.assets &&
stats.assets.every((asset) => !asset.emitted);
if (shouldEmit) {
this.sockWrite(sockets, 'still-ok');
return;
}
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');
}
}
watchFiles(watchPath, watchOptions) {
// 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
// eslint-disable-next-line no-undefined
const usePolling = watchOptions.poll ? true : undefined;
const interval =
typeof watchOptions.poll === 'number'
? watchOptions.poll
: // eslint-disable-next-line no-undefined
undefined;
const finalWatchOptions = {
ignoreInitial: true,
persistent: true,
followSymlinks: false,
atomic: false,
alwaysStat: true,
ignorePermissionErrors: true,
ignored: watchOptions.ignored,
usePolling,
interval,
};
const watcher = chokidar.watch(watchPath, finalWatchOptions);
// disabling refreshing on changing the content
if (this.options.liveReload) {
watcher.on('change', () => {
this.sockWrite(this.sockets, 'content-changed');
});
}
this.staticWatchers.push(watcher);
}
invalidate(callback) {
if (this.middleware) {
this.middleware.invalidate(callback);
}
}
}
module.exports = Server;