'use strict';
|
|
const EventEmitter = require('events');
|
const crypto = require('crypto');
|
const https = require('https');
|
const http = require('http');
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const net = require('net');
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const tls = require('tls');
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const url = require('url');
|
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const PerMessageDeflate = require('./permessage-deflate');
|
const EventTarget = require('./event-target');
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const extension = require('./extension');
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const Receiver = require('./receiver');
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const Sender = require('./sender');
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const {
|
BINARY_TYPES,
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EMPTY_BUFFER,
|
GUID,
|
kStatusCode,
|
kWebSocket,
|
NOOP
|
} = require('./constants');
|
|
const readyStates = ['CONNECTING', 'OPEN', 'CLOSING', 'CLOSED'];
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const protocolVersions = [8, 13];
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const closeTimeout = 30 * 1000;
|
|
/**
|
* Class representing a WebSocket.
|
*
|
* @extends EventEmitter
|
*/
|
class WebSocket extends EventEmitter {
|
/**
|
* Create a new `WebSocket`.
|
*
|
* @param {(String|url.Url|url.URL)} address The URL to which to connect
|
* @param {(String|String[])} protocols The subprotocols
|
* @param {Object} options Connection options
|
*/
|
constructor(address, protocols, options) {
|
super();
|
|
this.readyState = WebSocket.CONNECTING;
|
this.protocol = '';
|
|
this._binaryType = BINARY_TYPES[0];
|
this._closeFrameReceived = false;
|
this._closeFrameSent = false;
|
this._closeMessage = '';
|
this._closeTimer = null;
|
this._closeCode = 1006;
|
this._extensions = {};
|
this._receiver = null;
|
this._sender = null;
|
this._socket = null;
|
|
if (address !== null) {
|
this._isServer = false;
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this._redirects = 0;
|
|
if (Array.isArray(protocols)) {
|
protocols = protocols.join(', ');
|
} else if (typeof protocols === 'object' && protocols !== null) {
|
options = protocols;
|
protocols = undefined;
|
}
|
|
initAsClient(this, address, protocols, options);
|
} else {
|
this._isServer = true;
|
}
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}
|
|
get CONNECTING() {
|
return WebSocket.CONNECTING;
|
}
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get CLOSING() {
|
return WebSocket.CLOSING;
|
}
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get CLOSED() {
|
return WebSocket.CLOSED;
|
}
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get OPEN() {
|
return WebSocket.OPEN;
|
}
|
|
/**
|
* This deviates from the WHATWG interface since ws doesn't support the
|
* required default "blob" type (instead we define a custom "nodebuffer"
|
* type).
|
*
|
* @type {String}
|
*/
|
get binaryType() {
|
return this._binaryType;
|
}
|
|
set binaryType(type) {
|
if (!BINARY_TYPES.includes(type)) return;
|
|
this._binaryType = type;
|
|
//
|
// Allow to change `binaryType` on the fly.
|
//
|
if (this._receiver) this._receiver._binaryType = type;
|
}
|
|
/**
|
* @type {Number}
|
*/
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get bufferedAmount() {
|
if (!this._socket) return 0;
|
|
//
|
// `socket.bufferSize` is `undefined` if the socket is closed.
|
//
|
return (this._socket.bufferSize || 0) + this._sender._bufferedBytes;
|
}
|
|
/**
|
* @type {String}
|
*/
|
get extensions() {
|
return Object.keys(this._extensions).join();
|
}
|
|
/**
|
* Set up the socket and the internal resources.
|
*
|
* @param {net.Socket} socket The network socket between the server and client
|
* @param {Buffer} head The first packet of the upgraded stream
|
* @param {Number} maxPayload The maximum allowed message size
|
* @private
|
*/
|
setSocket(socket, head, maxPayload) {
|
const receiver = new Receiver(
|
this._binaryType,
|
this._extensions,
|
maxPayload
|
);
|
|
this._sender = new Sender(socket, this._extensions);
|
this._receiver = receiver;
|
this._socket = socket;
|
|
receiver[kWebSocket] = this;
|
socket[kWebSocket] = this;
|
|
receiver.on('conclude', receiverOnConclude);
|
receiver.on('drain', receiverOnDrain);
|
receiver.on('error', receiverOnError);
|
receiver.on('message', receiverOnMessage);
|
receiver.on('ping', receiverOnPing);
|
receiver.on('pong', receiverOnPong);
|
|
socket.setTimeout(0);
|
socket.setNoDelay();
|
|
if (head.length > 0) socket.unshift(head);
|
|
socket.on('close', socketOnClose);
|
socket.on('data', socketOnData);
|
socket.on('end', socketOnEnd);
|
socket.on('error', socketOnError);
|
|
this.readyState = WebSocket.OPEN;
|
this.emit('open');
|
}
|
|
/**
|
* Emit the `'close'` event.
|
*
|
* @private
|
*/
|
emitClose() {
|
this.readyState = WebSocket.CLOSED;
|
|
if (!this._socket) {
|
this.emit('close', this._closeCode, this._closeMessage);
|
return;
|
}
|
|
if (this._extensions[PerMessageDeflate.extensionName]) {
|
this._extensions[PerMessageDeflate.extensionName].cleanup();
|
}
|
|
this._receiver.removeAllListeners();
|
this.emit('close', this._closeCode, this._closeMessage);
|
}
|
|
/**
|
* Start a closing handshake.
|
*
|
* +----------+ +-----------+ +----------+
|
* - - -|ws.close()|-->|close frame|-->|ws.close()|- - -
|
* | +----------+ +-----------+ +----------+ |
|
* +----------+ +-----------+ |
|
* CLOSING |ws.close()|<--|close frame|<--+-----+ CLOSING
|
* +----------+ +-----------+ |
|
* | | | +---+ |
|
* +------------------------+-->|fin| - - - -
|
* | +---+ | +---+
|
* - - - - -|fin|<---------------------+
|
* +---+
|
*
|
* @param {Number} code Status code explaining why the connection is closing
|
* @param {String} data A string explaining why the connection is closing
|
* @public
|
*/
|
close(code, data) {
|
if (this.readyState === WebSocket.CLOSED) return;
|
if (this.readyState === WebSocket.CONNECTING) {
|
const msg = 'WebSocket was closed before the connection was established';
|
return abortHandshake(this, this._req, msg);
|
}
|
|
if (this.readyState === WebSocket.CLOSING) {
|
if (this._closeFrameSent && this._closeFrameReceived) this._socket.end();
|
return;
|
}
|
|
this.readyState = WebSocket.CLOSING;
|
this._sender.close(code, data, !this._isServer, (err) => {
|
//
|
// This error is handled by the `'error'` listener on the socket. We only
|
// want to know if the close frame has been sent here.
|
//
|
if (err) return;
|
|
this._closeFrameSent = true;
|
if (this._closeFrameReceived) this._socket.end();
|
});
|
|
//
|
// Specify a timeout for the closing handshake to complete.
|
//
|
this._closeTimer = setTimeout(
|
this._socket.destroy.bind(this._socket),
|
closeTimeout
|
);
|
}
|
|
/**
|
* Send a ping.
|
*
|
* @param {*} data The data to send
|
* @param {Boolean} mask Indicates whether or not to mask `data`
|
* @param {Function} cb Callback which is executed when the ping is sent
|
* @public
|
*/
|
ping(data, mask, cb) {
|
if (typeof data === 'function') {
|
cb = data;
|
data = mask = undefined;
|
} else if (typeof mask === 'function') {
|
cb = mask;
|
mask = undefined;
|
}
|
|
if (this.readyState !== WebSocket.OPEN) {
|
const err = new Error(
|
`WebSocket is not open: readyState ${this.readyState} ` +
|
`(${readyStates[this.readyState]})`
|
);
|
|
if (cb) return cb(err);
|
throw err;
|
}
|
|
if (typeof data === 'number') data = data.toString();
|
if (mask === undefined) mask = !this._isServer;
|
this._sender.ping(data || EMPTY_BUFFER, mask, cb);
|
}
|
|
/**
|
* Send a pong.
|
*
|
* @param {*} data The data to send
|
* @param {Boolean} mask Indicates whether or not to mask `data`
|
* @param {Function} cb Callback which is executed when the pong is sent
|
* @public
|
*/
|
pong(data, mask, cb) {
|
if (typeof data === 'function') {
|
cb = data;
|
data = mask = undefined;
|
} else if (typeof mask === 'function') {
|
cb = mask;
|
mask = undefined;
|
}
|
|
if (this.readyState !== WebSocket.OPEN) {
|
const err = new Error(
|
`WebSocket is not open: readyState ${this.readyState} ` +
|
`(${readyStates[this.readyState]})`
|
);
|
|
if (cb) return cb(err);
|
throw err;
|
}
|
|
if (typeof data === 'number') data = data.toString();
|
if (mask === undefined) mask = !this._isServer;
|
this._sender.pong(data || EMPTY_BUFFER, mask, cb);
|
}
|
|
/**
|
* Send a data message.
|
*
|
* @param {*} data The message to send
|
* @param {Object} options Options object
|
* @param {Boolean} options.compress Specifies whether or not to compress `data`
|
* @param {Boolean} options.binary Specifies whether `data` is binary or text
|
* @param {Boolean} options.fin Specifies whether the fragment is the last one
|
* @param {Boolean} options.mask Specifies whether or not to mask `data`
|
* @param {Function} cb Callback which is executed when data is written out
|
* @public
|
*/
|
send(data, options, cb) {
|
if (typeof options === 'function') {
|
cb = options;
|
options = {};
|
}
|
|
if (this.readyState !== WebSocket.OPEN) {
|
const err = new Error(
|
`WebSocket is not open: readyState ${this.readyState} ` +
|
`(${readyStates[this.readyState]})`
|
);
|
|
if (cb) return cb(err);
|
throw err;
|
}
|
|
if (typeof data === 'number') data = data.toString();
|
|
const opts = Object.assign(
|
{
|
binary: typeof data !== 'string',
|
mask: !this._isServer,
|
compress: true,
|
fin: true
|
},
|
options
|
);
|
|
if (!this._extensions[PerMessageDeflate.extensionName]) {
|
opts.compress = false;
|
}
|
|
this._sender.send(data || EMPTY_BUFFER, opts, cb);
|
}
|
|
/**
|
* Forcibly close the connection.
|
*
|
* @public
|
*/
|
terminate() {
|
if (this.readyState === WebSocket.CLOSED) return;
|
if (this.readyState === WebSocket.CONNECTING) {
|
const msg = 'WebSocket was closed before the connection was established';
|
return abortHandshake(this, this._req, msg);
|
}
|
|
if (this._socket) {
|
this.readyState = WebSocket.CLOSING;
|
this._socket.destroy();
|
}
|
}
|
}
|
|
readyStates.forEach((readyState, i) => {
|
WebSocket[readyState] = i;
|
});
|
|
//
|
// Add the `onopen`, `onerror`, `onclose`, and `onmessage` attributes.
|
// See https://html.spec.whatwg.org/multipage/comms.html#the-websocket-interface
|
//
|
['open', 'error', 'close', 'message'].forEach((method) => {
|
Object.defineProperty(WebSocket.prototype, `on${method}`, {
|
/**
|
* Return the listener of the event.
|
*
|
* @return {(Function|undefined)} The event listener or `undefined`
|
* @public
|
*/
|
get() {
|
const listeners = this.listeners(method);
|
for (var i = 0; i < listeners.length; i++) {
|
if (listeners[i]._listener) return listeners[i]._listener;
|
}
|
|
return undefined;
|
},
|
/**
|
* Add a listener for the event.
|
*
|
* @param {Function} listener The listener to add
|
* @public
|
*/
|
set(listener) {
|
const listeners = this.listeners(method);
|
for (var i = 0; i < listeners.length; i++) {
|
//
|
// Remove only the listeners added via `addEventListener`.
|
//
|
if (listeners[i]._listener) this.removeListener(method, listeners[i]);
|
}
|
this.addEventListener(method, listener);
|
}
|
});
|
});
|
|
WebSocket.prototype.addEventListener = EventTarget.addEventListener;
|
WebSocket.prototype.removeEventListener = EventTarget.removeEventListener;
|
|
module.exports = WebSocket;
|
|
/**
|
* Initialize a WebSocket client.
|
*
|
* @param {WebSocket} websocket The client to initialize
|
* @param {(String|url.Url|url.URL)} address The URL to which to connect
|
* @param {String} protocols The subprotocols
|
* @param {Object} options Connection options
|
* @param {(Boolean|Object)} options.perMessageDeflate Enable/disable
|
* permessage-deflate
|
* @param {Number} options.handshakeTimeout Timeout in milliseconds for the
|
* handshake request
|
* @param {Number} options.protocolVersion Value of the `Sec-WebSocket-Version`
|
* header
|
* @param {String} options.origin Value of the `Origin` or
|
* `Sec-WebSocket-Origin` header
|
* @param {Number} options.maxPayload The maximum allowed message size
|
* @param {Boolean} options.followRedirects Whether or not to follow redirects
|
* @param {Number} options.maxRedirects The maximum number of redirects allowed
|
* @private
|
*/
|
function initAsClient(websocket, address, protocols, options) {
|
const opts = Object.assign(
|
{
|
protocolVersion: protocolVersions[1],
|
maxPayload: 100 * 1024 * 1024,
|
perMessageDeflate: true,
|
followRedirects: false,
|
maxRedirects: 10
|
},
|
options,
|
{
|
createConnection: undefined,
|
socketPath: undefined,
|
hostname: undefined,
|
protocol: undefined,
|
timeout: undefined,
|
method: undefined,
|
auth: undefined,
|
host: undefined,
|
path: undefined,
|
port: undefined
|
}
|
);
|
|
if (!protocolVersions.includes(opts.protocolVersion)) {
|
throw new RangeError(
|
`Unsupported protocol version: ${opts.protocolVersion} ` +
|
`(supported versions: ${protocolVersions.join(', ')})`
|
);
|
}
|
|
var parsedUrl;
|
|
if (typeof address === 'object' && address.href !== undefined) {
|
parsedUrl = address;
|
websocket.url = address.href;
|
} else {
|
//
|
// The WHATWG URL constructor is not available on Node.js < 6.13.0
|
//
|
parsedUrl = url.URL ? new url.URL(address) : url.parse(address);
|
websocket.url = address;
|
}
|
|
const isUnixSocket = parsedUrl.protocol === 'ws+unix:';
|
|
if (!parsedUrl.host && (!isUnixSocket || !parsedUrl.pathname)) {
|
throw new Error(`Invalid URL: ${websocket.url}`);
|
}
|
|
const isSecure =
|
parsedUrl.protocol === 'wss:' || parsedUrl.protocol === 'https:';
|
const defaultPort = isSecure ? 443 : 80;
|
const key = crypto.randomBytes(16).toString('base64');
|
const get = isSecure ? https.get : http.get;
|
const path = parsedUrl.search
|
? `${parsedUrl.pathname || '/'}${parsedUrl.search}`
|
: parsedUrl.pathname || '/';
|
var perMessageDeflate;
|
|
opts.createConnection = isSecure ? tlsConnect : netConnect;
|
opts.defaultPort = opts.defaultPort || defaultPort;
|
opts.port = parsedUrl.port || defaultPort;
|
opts.host = parsedUrl.hostname.startsWith('[')
|
? parsedUrl.hostname.slice(1, -1)
|
: parsedUrl.hostname;
|
opts.headers = Object.assign(
|
{
|
'Sec-WebSocket-Version': opts.protocolVersion,
|
'Sec-WebSocket-Key': key,
|
Connection: 'Upgrade',
|
Upgrade: 'websocket'
|
},
|
opts.headers
|
);
|
opts.path = path;
|
opts.timeout = opts.handshakeTimeout;
|
|
if (opts.perMessageDeflate) {
|
perMessageDeflate = new PerMessageDeflate(
|
opts.perMessageDeflate !== true ? opts.perMessageDeflate : {},
|
false,
|
opts.maxPayload
|
);
|
opts.headers['Sec-WebSocket-Extensions'] = extension.format({
|
[PerMessageDeflate.extensionName]: perMessageDeflate.offer()
|
});
|
}
|
if (protocols) {
|
opts.headers['Sec-WebSocket-Protocol'] = protocols;
|
}
|
if (opts.origin) {
|
if (opts.protocolVersion < 13) {
|
opts.headers['Sec-WebSocket-Origin'] = opts.origin;
|
} else {
|
opts.headers.Origin = opts.origin;
|
}
|
}
|
if (parsedUrl.auth) {
|
opts.auth = parsedUrl.auth;
|
} else if (parsedUrl.username || parsedUrl.password) {
|
opts.auth = `${parsedUrl.username}:${parsedUrl.password}`;
|
}
|
|
if (isUnixSocket) {
|
const parts = path.split(':');
|
|
opts.socketPath = parts[0];
|
opts.path = parts[1];
|
}
|
|
var req = (websocket._req = get(opts));
|
|
if (opts.timeout) {
|
req.on('timeout', () => {
|
abortHandshake(websocket, req, 'Opening handshake has timed out');
|
});
|
}
|
|
req.on('error', (err) => {
|
if (websocket._req.aborted) return;
|
|
req = websocket._req = null;
|
websocket.readyState = WebSocket.CLOSING;
|
websocket.emit('error', err);
|
websocket.emitClose();
|
});
|
|
req.on('response', (res) => {
|
const location = res.headers.location;
|
const statusCode = res.statusCode;
|
|
if (
|
location &&
|
opts.followRedirects &&
|
statusCode >= 300 &&
|
statusCode < 400
|
) {
|
if (++websocket._redirects > opts.maxRedirects) {
|
abortHandshake(websocket, req, 'Maximum redirects exceeded');
|
return;
|
}
|
|
req.abort();
|
|
const addr = url.URL
|
? new url.URL(location, address)
|
: url.resolve(address, location);
|
|
initAsClient(websocket, addr, protocols, options);
|
} else if (!websocket.emit('unexpected-response', req, res)) {
|
abortHandshake(
|
websocket,
|
req,
|
`Unexpected server response: ${res.statusCode}`
|
);
|
}
|
});
|
|
req.on('upgrade', (res, socket, head) => {
|
websocket.emit('upgrade', res);
|
|
//
|
// The user may have closed the connection from a listener of the `upgrade`
|
// event.
|
//
|
if (websocket.readyState !== WebSocket.CONNECTING) return;
|
|
req = websocket._req = null;
|
|
const digest = crypto
|
.createHash('sha1')
|
.update(key + GUID)
|
.digest('base64');
|
|
if (res.headers['sec-websocket-accept'] !== digest) {
|
abortHandshake(websocket, socket, 'Invalid Sec-WebSocket-Accept header');
|
return;
|
}
|
|
const serverProt = res.headers['sec-websocket-protocol'];
|
const protList = (protocols || '').split(/, */);
|
var protError;
|
|
if (!protocols && serverProt) {
|
protError = 'Server sent a subprotocol but none was requested';
|
} else if (protocols && !serverProt) {
|
protError = 'Server sent no subprotocol';
|
} else if (serverProt && !protList.includes(serverProt)) {
|
protError = 'Server sent an invalid subprotocol';
|
}
|
|
if (protError) {
|
abortHandshake(websocket, socket, protError);
|
return;
|
}
|
|
if (serverProt) websocket.protocol = serverProt;
|
|
if (perMessageDeflate) {
|
try {
|
const extensions = extension.parse(
|
res.headers['sec-websocket-extensions']
|
);
|
|
if (extensions[PerMessageDeflate.extensionName]) {
|
perMessageDeflate.accept(extensions[PerMessageDeflate.extensionName]);
|
websocket._extensions[
|
PerMessageDeflate.extensionName
|
] = perMessageDeflate;
|
}
|
} catch (err) {
|
abortHandshake(
|
websocket,
|
socket,
|
'Invalid Sec-WebSocket-Extensions header'
|
);
|
return;
|
}
|
}
|
|
websocket.setSocket(socket, head, opts.maxPayload);
|
});
|
}
|
|
/**
|
* Create a `net.Socket` and initiate a connection.
|
*
|
* @param {Object} options Connection options
|
* @return {net.Socket} The newly created socket used to start the connection
|
* @private
|
*/
|
function netConnect(options) {
|
//
|
// Override `options.path` only if `options` is a copy of the original options
|
// object. This is always true on Node.js >= 8 but not on Node.js 6 where
|
// `options.socketPath` might be `undefined` even if the `socketPath` option
|
// was originally set.
|
//
|
if (options.protocolVersion) options.path = options.socketPath;
|
return net.connect(options);
|
}
|
|
/**
|
* Create a `tls.TLSSocket` and initiate a connection.
|
*
|
* @param {Object} options Connection options
|
* @return {tls.TLSSocket} The newly created socket used to start the connection
|
* @private
|
*/
|
function tlsConnect(options) {
|
options.path = undefined;
|
options.servername = options.servername || options.host;
|
return tls.connect(options);
|
}
|
|
/**
|
* Abort the handshake and emit an error.
|
*
|
* @param {WebSocket} websocket The WebSocket instance
|
* @param {(http.ClientRequest|net.Socket)} stream The request to abort or the
|
* socket to destroy
|
* @param {String} message The error message
|
* @private
|
*/
|
function abortHandshake(websocket, stream, message) {
|
websocket.readyState = WebSocket.CLOSING;
|
|
const err = new Error(message);
|
Error.captureStackTrace(err, abortHandshake);
|
|
if (stream.setHeader) {
|
stream.abort();
|
stream.once('abort', websocket.emitClose.bind(websocket));
|
websocket.emit('error', err);
|
} else {
|
stream.destroy(err);
|
stream.once('error', websocket.emit.bind(websocket, 'error'));
|
stream.once('close', websocket.emitClose.bind(websocket));
|
}
|
}
|
|
/**
|
* The listener of the `Receiver` `'conclude'` event.
|
*
|
* @param {Number} code The status code
|
* @param {String} reason The reason for closing
|
* @private
|
*/
|
function receiverOnConclude(code, reason) {
|
const websocket = this[kWebSocket];
|
|
websocket._socket.removeListener('data', socketOnData);
|
websocket._socket.resume();
|
|
websocket._closeFrameReceived = true;
|
websocket._closeMessage = reason;
|
websocket._closeCode = code;
|
|
if (code === 1005) websocket.close();
|
else websocket.close(code, reason);
|
}
|
|
/**
|
* The listener of the `Receiver` `'drain'` event.
|
*
|
* @private
|
*/
|
function receiverOnDrain() {
|
this[kWebSocket]._socket.resume();
|
}
|
|
/**
|
* The listener of the `Receiver` `'error'` event.
|
*
|
* @param {(RangeError|Error)} err The emitted error
|
* @private
|
*/
|
function receiverOnError(err) {
|
const websocket = this[kWebSocket];
|
|
websocket._socket.removeListener('data', socketOnData);
|
|
websocket.readyState = WebSocket.CLOSING;
|
websocket._closeCode = err[kStatusCode];
|
websocket.emit('error', err);
|
websocket._socket.destroy();
|
}
|
|
/**
|
* The listener of the `Receiver` `'finish'` event.
|
*
|
* @private
|
*/
|
function receiverOnFinish() {
|
this[kWebSocket].emitClose();
|
}
|
|
/**
|
* The listener of the `Receiver` `'message'` event.
|
*
|
* @param {(String|Buffer|ArrayBuffer|Buffer[])} data The message
|
* @private
|
*/
|
function receiverOnMessage(data) {
|
this[kWebSocket].emit('message', data);
|
}
|
|
/**
|
* The listener of the `Receiver` `'ping'` event.
|
*
|
* @param {Buffer} data The data included in the ping frame
|
* @private
|
*/
|
function receiverOnPing(data) {
|
const websocket = this[kWebSocket];
|
|
websocket.pong(data, !websocket._isServer, NOOP);
|
websocket.emit('ping', data);
|
}
|
|
/**
|
* The listener of the `Receiver` `'pong'` event.
|
*
|
* @param {Buffer} data The data included in the pong frame
|
* @private
|
*/
|
function receiverOnPong(data) {
|
this[kWebSocket].emit('pong', data);
|
}
|
|
/**
|
* The listener of the `net.Socket` `'close'` event.
|
*
|
* @private
|
*/
|
function socketOnClose() {
|
const websocket = this[kWebSocket];
|
|
this.removeListener('close', socketOnClose);
|
this.removeListener('end', socketOnEnd);
|
|
websocket.readyState = WebSocket.CLOSING;
|
|
//
|
// The close frame might not have been received or the `'end'` event emitted,
|
// for example, if the socket was destroyed due to an error. Ensure that the
|
// `receiver` stream is closed after writing any remaining buffered data to
|
// it. If the readable side of the socket is in flowing mode then there is no
|
// buffered data as everything has been already written and `readable.read()`
|
// will return `null`. If instead, the socket is paused, any possible buffered
|
// data will be read as a single chunk and emitted synchronously in a single
|
// `'data'` event.
|
//
|
websocket._socket.read();
|
websocket._receiver.end();
|
|
this.removeListener('data', socketOnData);
|
this[kWebSocket] = undefined;
|
|
clearTimeout(websocket._closeTimer);
|
|
if (
|
websocket._receiver._writableState.finished ||
|
websocket._receiver._writableState.errorEmitted
|
) {
|
websocket.emitClose();
|
} else {
|
websocket._receiver.on('error', receiverOnFinish);
|
websocket._receiver.on('finish', receiverOnFinish);
|
}
|
}
|
|
/**
|
* The listener of the `net.Socket` `'data'` event.
|
*
|
* @param {Buffer} chunk A chunk of data
|
* @private
|
*/
|
function socketOnData(chunk) {
|
if (!this[kWebSocket]._receiver.write(chunk)) {
|
this.pause();
|
}
|
}
|
|
/**
|
* The listener of the `net.Socket` `'end'` event.
|
*
|
* @private
|
*/
|
function socketOnEnd() {
|
const websocket = this[kWebSocket];
|
|
websocket.readyState = WebSocket.CLOSING;
|
websocket._receiver.end();
|
this.end();
|
}
|
|
/**
|
* The listener of the `net.Socket` `'error'` event.
|
*
|
* @private
|
*/
|
function socketOnError() {
|
const websocket = this[kWebSocket];
|
|
this.removeListener('error', socketOnError);
|
this.on('error', NOOP);
|
|
websocket.readyState = WebSocket.CLOSING;
|
this.destroy();
|
}
|
