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The MIT License (MIT)
Copyright (c) 2011 Einar Otto Stangvik <einaros@gmail.com>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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# ws: a Node.js WebSocket library
[![Version npm](https://img.shields.io/npm/v/ws.svg)](https://www.npmjs.com/package/ws)
[![Linux Build](https://img.shields.io/travis/websockets/ws/master.svg)](https://travis-ci.org/websockets/ws)
[![Windows Build](https://ci.appveyor.com/api/projects/status/github/websockets/ws?branch=master&svg=true)](https://ci.appveyor.com/project/lpinca/ws)
[![Coverage Status](https://img.shields.io/coveralls/websockets/ws/master.svg)](https://coveralls.io/r/websockets/ws?branch=master)
`ws` is a simple to use, blazing fast, and thoroughly tested WebSocket client
and server implementation.
Passes the quite extensive Autobahn test suite. See http://websockets.github.io/ws/
for the full reports.
## Protocol support
* **HyBi drafts 07-12** (Use the option `protocolVersion: 8`)
* **HyBi drafts 13-17** (Current default, alternatively option `protocolVersion: 13`)
## Installing
```
npm install --save ws
```
### Opt-in for performance
There are 2 optional modules that can be installed along side with the `ws`
module. These modules are binary addons which improve certain operations, but as
they are binary addons they require compilation which can fail if no c++
compiler is installed on the host system.
- `npm install --save bufferutil`: Improves internal buffer operations which
allows for faster processing of masked WebSocket frames and general buffer
operations.
- `npm install --save utf-8-validate`: The specification requires validation of
invalid UTF-8 chars, some of these validations could not be done in JavaScript
hence the need for a binary addon. In most cases you will already be
validating the input that you receive for security purposes leading to double
validation. But if you want to be 100% spec-conforming and have fast
validation of UTF-8 then this module is a must.
## API Docs
See [`/doc/ws.md`](https://github.com/websockets/ws/blob/master/doc/ws.md)
for Node.js-like docs for the ws classes.
## WebSocket compression
`ws` supports the [permessage-deflate extension][permessage-deflate] extension
which enables the client and server to negotiate a compression algorithm and
its parameters, and then selectively apply it to the data payloads of each
WebSocket message.
The extension is enabled by default but adds a significant overhead in terms of
performance and memory comsumption. We suggest to use WebSocket compression
only if it is really needed.
To disable the extension you can set the `perMessageDeflate` option to `false`.
On the server:
```js
const WebSocket = require('ws');
const wss = new WebSocket.Server({
perMessageDeflate: false,
port: 8080
});
```
On the client:
```js
const WebSocket = require('ws');
const ws = new WebSocket('ws://www.host.com/path', {
perMessageDeflate: false
});
```
## Usage examples
### Sending and receiving text data
```js
const WebSocket = require('ws');
const ws = new WebSocket('ws://www.host.com/path');
ws.on('open', function open() {
ws.send('something');
});
ws.on('message', function incoming(data, flags) {
// flags.binary will be set if a binary data is received.
// flags.masked will be set if the data was masked.
});
```
### Sending binary data
```js
const WebSocket = require('ws');
const ws = new WebSocket('ws://www.host.com/path');
ws.on('open', function open() {
const array = new Float32Array(5);
for (var i = 0; i < array.length; ++i) {
array[i] = i / 2;
}
ws.send(array);
});
```
### Server example
```js
const WebSocket = require('ws');
const wss = new WebSocket.Server({ port: 8080 });
wss.on('connection', function connection(ws) {
ws.on('message', function incoming(message) {
console.log('received: %s', message);
});
ws.send('something');
});
```
### Broadcast example
```js
const WebSocket = require('ws');
const wss = new WebSocket.Server({ port: 8080 });
// Broadcast to all.
wss.broadcast = function broadcast(data) {
wss.clients.forEach(function each(client) {
if (client.readyState === WebSocket.OPEN) {
client.send(data);
}
});
};
wss.on('connection', function connection(ws) {
ws.on('message', function incoming(data) {
// Broadcast to everyone else.
wss.clients.forEach(function each(client) {
if (client !== ws && client.readyState === WebSocket.OPEN) {
client.send(data);
}
});
});
});
```
### ExpressJS example
```js
const express = require('express');
const http = require('http');
const url = require('url');
const WebSocket = require('ws');
const app = express();
app.use(function (req, res) {
res.send({ msg: "hello" });
});
const server = http.createServer(app);
const wss = new WebSocket.Server({ server });
wss.on('connection', function connection(ws) {
const location = url.parse(ws.upgradeReq.url, true);
// You might use location.query.access_token to authenticate or share sessions
// or ws.upgradeReq.headers.cookie (see http://stackoverflow.com/a/16395220/151312)
ws.on('message', function incoming(message) {
console.log('received: %s', message);
});
ws.send('something');
});
server.listen(8080, function listening() {
console.log('Listening on %d', server.address().port);
});
```
### echo.websocket.org demo
```js
const WebSocket = require('ws');
const ws = new WebSocket('wss://echo.websocket.org/', {
origin: 'https://websocket.org'
});
ws.on('open', function open() {
console.log('connected');
ws.send(Date.now());
});
ws.on('close', function close() {
console.log('disconnected');
});
ws.on('message', function incoming(data, flags) {
console.log(`Roundtrip time: ${Date.now() - data} ms`, flags);
setTimeout(function timeout() {
ws.send(Date.now());
}, 500);
});
```
### Other examples
For a full example with a browser client communicating with a ws server, see the
examples folder.
Otherwise, see the test cases.
## Error handling best practices
```js
// If the WebSocket is closed before the following send is attempted
ws.send('something');
// Errors (both immediate and async write errors) can be detected in an optional
// callback. The callback is also the only way of being notified that data has
// actually been sent.
ws.send('something', function ack(error) {
// If error is not defined, the send has been completed, otherwise the error
// object will indicate what failed.
});
// Immediate errors can also be handled with `try...catch`, but **note** that
// since sends are inherently asynchronous, socket write failures will *not* be
// captured when this technique is used.
try { ws.send('something'); }
catch (e) { /* handle error */ }
```
## Changelog
We're using the GitHub [`releases`](https://github.com/websockets/ws/releases)
for changelog entries.
## License
[MIT](LICENSE)
[permessage-deflate]: https://tools.ietf.org/html/rfc7692

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# Security Guidelines
Please contact us directly at **security@3rd-Eden.com** for any bug that might
impact the security of this project. Please prefix the subject of your email
with `[security]` in lowercase and square brackets. Our email filters will
automatically prevent these messages from being moved to our spam box.
You will receive an acknowledgement of your report within **24 hours**.
All emails that do not include security vulnerabilities will be removed and
blocked instantly.
## Exceptions
If you do not receive an acknowledgement within the said time frame please give
us the benefit of the doubt as it's possible that we haven't seen it yet. In
this case please send us a message **without details** using one of the
following methods:
- Contact the lead developers of this project on their personal e-mails. You
can find the e-mails in the git logs, for example using the following command:
`git --no-pager show -s --format='%an <%ae>' <gitsha>` where `<gitsha>` is the
SHA1 of their latest commit in the project.
- Create a GitHub issue stating contact details and the severity of the issue.
Once we have acknowledged receipt of your report and confirmed the bug
ourselves we will work with you to fix the vulnerability and publicly acknowledge
your responsible disclosure, if you wish. In addition to that we will report
all vulnerabilities to the [Node Security Project](https://nodesecurity.io/).
## History
04 Jan 2016: [Buffer vulnerablity](https://github.com/websockets/ws/releases/tag/1.0.1)

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/*!
* ws: a node.js websocket client
* Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
* MIT Licensed
*/
'use strict';
const WebSocket = require('./lib/WebSocket');
WebSocket.Server = require('./lib/WebSocketServer');
WebSocket.Receiver = require('./lib/Receiver');
WebSocket.Sender = require('./lib/Sender');
module.exports = WebSocket;

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/*!
* ws: a node.js websocket client
* Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
* MIT Licensed
*/
'use strict';
const safeBuffer = require('safe-buffer');
const Buffer = safeBuffer.Buffer;
/**
* Merges an array of buffers into a new buffer.
*
* @param {Buffer[]} list The array of buffers to concat
* @param {Number} totalLength The total length of buffers in the list
* @return {Buffer} The resulting buffer
* @public
*/
const concat = (list, totalLength) => {
const target = Buffer.allocUnsafe(totalLength);
var offset = 0;
for (var i = 0; i < list.length; i++) {
const buf = list[i];
buf.copy(target, offset);
offset += buf.length;
}
return target;
};
try {
const bufferUtil = require('bufferutil');
module.exports = Object.assign({ concat }, bufferUtil.BufferUtil || bufferUtil);
} catch (e) /* istanbul ignore next */ {
/**
* Masks a buffer using the given mask.
*
* @param {Buffer} source The buffer to mask
* @param {Buffer} mask The mask to use
* @param {Buffer} output The buffer where to store the result
* @param {Number} offset The offset at which to start writing
* @param {Number} length The number of bytes to mask.
* @public
*/
const mask = (source, mask, output, offset, length) => {
for (var i = 0; i < length; i++) {
output[offset + i] = source[i] ^ mask[i & 3];
}
};
/**
* Unmasks a buffer using the given mask.
*
* @param {Buffer} buffer The buffer to unmask
* @param {Buffer} mask The mask to use
* @public
*/
const unmask = (buffer, mask) => {
// Required until https://github.com/nodejs/node/issues/9006 is resolved.
const length = buffer.length;
for (var i = 0; i < length; i++) {
buffer[i] ^= mask[i & 3];
}
};
module.exports = { concat, mask, unmask };
}

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'use strict';
const safeBuffer = require('safe-buffer');
const Buffer = safeBuffer.Buffer;
exports.BINARY_TYPES = ['nodebuffer', 'arraybuffer', 'fragments'];
exports.GUID = '258EAFA5-E914-47DA-95CA-C5AB0DC85B11';
exports.EMPTY_BUFFER = Buffer.alloc(0);
exports.NOOP = () => {};

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/*!
* ws: a node.js websocket client
* Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
* MIT Licensed
*/
'use strict';
module.exports = {
isValidErrorCode: function (code) {
return (code >= 1000 && code <= 1013 && code !== 1004 && code !== 1005 && code !== 1006) ||
(code >= 3000 && code <= 4999);
},
1000: 'normal',
1001: 'going away',
1002: 'protocol error',
1003: 'unsupported data',
1004: 'reserved',
1005: 'reserved for extensions',
1006: 'reserved for extensions',
1007: 'inconsistent or invalid data',
1008: 'policy violation',
1009: 'message too big',
1010: 'extension handshake missing',
1011: 'an unexpected condition prevented the request from being fulfilled',
1012: 'service restart',
1013: 'try again later'
};

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'use strict';
/**
* Class representing an event.
*
* @private
*/
class Event {
/**
* Create a new `Event`.
*
* @param {String} type The name of the event
* @param {Object} target A reference to the target to which the event was dispatched
*/
constructor (type, target) {
this.target = target;
this.type = type;
}
}
/**
* Class representing a message event.
*
* @extends Event
* @private
*/
class MessageEvent extends Event {
/**
* Create a new `MessageEvent`.
*
* @param {(String|Buffer|ArrayBuffer|Buffer[])} data The received data
* @param {Boolean} isBinary Specifies if `data` is binary
* @param {WebSocket} target A reference to the target to which the event was dispatched
*/
constructor (data, isBinary, target) {
super('message', target);
this.binary = isBinary; // non-standard.
this.data = data;
}
}
/**
* Class representing a close event.
*
* @extends Event
* @private
*/
class CloseEvent extends Event {
/**
* Create a new `CloseEvent`.
*
* @param {Number} code The status code explaining why the connection is being closed
* @param {String} reason A human-readable string explaining why the connection is closing
* @param {WebSocket} target A reference to the target to which the event was dispatched
*/
constructor (code, reason, target) {
super('close', target);
this.wasClean = code === undefined || code === 1000;
this.reason = reason;
this.target = target;
this.type = 'close';
this.code = code;
}
}
/**
* Class representing an open event.
*
* @extends Event
* @private
*/
class OpenEvent extends Event {
/**
* Create a new `OpenEvent`.
*
* @param {WebSocket} target A reference to the target to which the event was dispatched
*/
constructor (target) {
super('open', target);
}
}
/**
* This provides methods for emulating the `EventTarget` interface. It's not
* meant to be used directly.
*
* @mixin
*/
const EventTarget = {
/**
* Register an event listener.
*
* @param {String} method A string representing the event type to listen for
* @param {Function} listener The listener to add
* @public
*/
addEventListener (method, listener) {
if (typeof listener !== 'function') return;
function onMessage (data, flags) {
listener.call(this, new MessageEvent(data, !!flags.binary, this));
}
function onClose (code, message) {
listener.call(this, new CloseEvent(code, message, this));
}
function onError (event) {
event.type = 'error';
event.target = this;
listener.call(this, event);
}
function onOpen () {
listener.call(this, new OpenEvent(this));
}
if (method === 'message') {
onMessage._listener = listener;
this.on(method, onMessage);
} else if (method === 'close') {
onClose._listener = listener;
this.on(method, onClose);
} else if (method === 'error') {
onError._listener = listener;
this.on(method, onError);
} else if (method === 'open') {
onOpen._listener = listener;
this.on(method, onOpen);
} else {
this.on(method, listener);
}
},
/**
* Remove an event listener.
*
* @param {String} method A string representing the event type to remove
* @param {Function} listener The listener to remove
* @public
*/
removeEventListener (method, listener) {
const listeners = this.listeners(method);
for (var i = 0; i < listeners.length; i++) {
if (listeners[i] === listener || listeners[i]._listener === listener) {
this.removeListener(method, listeners[i]);
}
}
}
};
module.exports = EventTarget;

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'use strict';
/**
* Parse the `Sec-WebSocket-Extensions` header into an object.
*
* @param {String} value field value of the header
* @return {Object} The parsed object
* @public
*/
const parse = (value) => {
value = value || '';
const extensions = {};
value.split(',').forEach((v) => {
const params = v.split(';');
const token = params.shift().trim();
const paramsList = extensions[token] = extensions[token] || [];
const parsedParams = {};
params.forEach((param) => {
const parts = param.trim().split('=');
const key = parts[0];
var value = parts[1];
if (value === undefined) {
value = true;
} else {
// unquote value
if (value[0] === '"') {
value = value.slice(1);
}
if (value[value.length - 1] === '"') {
value = value.slice(0, value.length - 1);
}
}
(parsedParams[key] = parsedParams[key] || []).push(value);
});
paramsList.push(parsedParams);
});
return extensions;
};
/**
* Serialize a parsed `Sec-WebSocket-Extensions` header to a string.
*
* @param {Object} value The object to format
* @return {String} A string representing the given value
* @public
*/
const format = (value) => {
return Object.keys(value).map((token) => {
var paramsList = value[token];
if (!Array.isArray(paramsList)) paramsList = [paramsList];
return paramsList.map((params) => {
return [token].concat(Object.keys(params).map((k) => {
var p = params[k];
if (!Array.isArray(p)) p = [p];
return p.map((v) => v === true ? k : `${k}=${v}`).join('; ');
})).join('; ');
}).join(', ');
}).join(', ');
};
module.exports = { format, parse };

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'use strict';
const safeBuffer = require('safe-buffer');
const zlib = require('zlib');
const bufferUtil = require('./BufferUtil');
const Buffer = safeBuffer.Buffer;
const AVAILABLE_WINDOW_BITS = [8, 9, 10, 11, 12, 13, 14, 15];
const TRAILER = Buffer.from([0x00, 0x00, 0xff, 0xff]);
const EMPTY_BLOCK = Buffer.from([0x00]);
const DEFAULT_WINDOW_BITS = 15;
const DEFAULT_MEM_LEVEL = 8;
/**
* Per-message Deflate implementation.
*/
class PerMessageDeflate {
constructor (options, isServer, maxPayload) {
this._options = options || {};
this._isServer = !!isServer;
this._inflate = null;
this._deflate = null;
this.params = null;
this._maxPayload = maxPayload || 0;
this.threshold = this._options.threshold === undefined ? 1024 : this._options.threshold;
}
static get extensionName () {
return 'permessage-deflate';
}
/**
* Create extension parameters offer.
*
* @return {Object} Extension parameters
* @public
*/
offer () {
const params = {};
if (this._options.serverNoContextTakeover) {
params.server_no_context_takeover = true;
}
if (this._options.clientNoContextTakeover) {
params.client_no_context_takeover = true;
}
if (this._options.serverMaxWindowBits) {
params.server_max_window_bits = this._options.serverMaxWindowBits;
}
if (this._options.clientMaxWindowBits) {
params.client_max_window_bits = this._options.clientMaxWindowBits;
} else if (this._options.clientMaxWindowBits == null) {
params.client_max_window_bits = true;
}
return params;
}
/**
* Accept extension offer.
*
* @param {Array} paramsList Extension parameters
* @return {Object} Accepted configuration
* @public
*/
accept (paramsList) {
paramsList = this.normalizeParams(paramsList);
var params;
if (this._isServer) {
params = this.acceptAsServer(paramsList);
} else {
params = this.acceptAsClient(paramsList);
}
this.params = params;
return params;
}
/**
* Releases all resources used by the extension.
*
* @public
*/
cleanup () {
if (this._inflate) {
if (this._inflate.writeInProgress) {
this._inflate.pendingClose = true;
} else {
this._inflate.close();
this._inflate = null;
}
}
if (this._deflate) {
if (this._deflate.writeInProgress) {
this._deflate.pendingClose = true;
} else {
this._deflate.close();
this._deflate = null;
}
}
}
/**
* Accept extension offer from client.
*
* @param {Array} paramsList Extension parameters
* @return {Object} Accepted configuration
* @private
*/
acceptAsServer (paramsList) {
const accepted = {};
const result = paramsList.some((params) => {
if ((
this._options.serverNoContextTakeover === false &&
params.server_no_context_takeover
) || (
this._options.serverMaxWindowBits === false &&
params.server_max_window_bits
) || (
typeof this._options.serverMaxWindowBits === 'number' &&
typeof params.server_max_window_bits === 'number' &&
this._options.serverMaxWindowBits > params.server_max_window_bits
) || (
typeof this._options.clientMaxWindowBits === 'number' &&
!params.client_max_window_bits
)) {
return;
}
if (
this._options.serverNoContextTakeover ||
params.server_no_context_takeover
) {
accepted.server_no_context_takeover = true;
}
if (this._options.clientNoContextTakeover) {
accepted.client_no_context_takeover = true;
}
if (
this._options.clientNoContextTakeover !== false &&
params.client_no_context_takeover
) {
accepted.client_no_context_takeover = true;
}
if (typeof this._options.serverMaxWindowBits === 'number') {
accepted.server_max_window_bits = this._options.serverMaxWindowBits;
} else if (typeof params.server_max_window_bits === 'number') {
accepted.server_max_window_bits = params.server_max_window_bits;
}
if (typeof this._options.clientMaxWindowBits === 'number') {
accepted.client_max_window_bits = this._options.clientMaxWindowBits;
} else if (
this._options.clientMaxWindowBits !== false &&
typeof params.client_max_window_bits === 'number'
) {
accepted.client_max_window_bits = params.client_max_window_bits;
}
return true;
});
if (!result) throw new Error(`Doesn't support the offered configuration`);
return accepted;
}
/**
* Accept extension response from server.
*
* @param {Array} paramsList Extension parameters
* @return {Object} Accepted configuration
* @private
*/
acceptAsClient (paramsList) {
const params = paramsList[0];
if (this._options.clientNoContextTakeover != null) {
if (
this._options.clientNoContextTakeover === false &&
params.client_no_context_takeover
) {
throw new Error('Invalid value for "client_no_context_takeover"');
}
}
if (this._options.clientMaxWindowBits != null) {
if (
this._options.clientMaxWindowBits === false &&
params.client_max_window_bits
) {
throw new Error('Invalid value for "client_max_window_bits"');
}
if (
typeof this._options.clientMaxWindowBits === 'number' && (
!params.client_max_window_bits ||
params.client_max_window_bits > this._options.clientMaxWindowBits
)) {
throw new Error('Invalid value for "client_max_window_bits"');
}
}
return params;
}
/**
* Normalize extensions parameters.
*
* @param {Array} paramsList Extension parameters
* @return {Array} Normalized extensions parameters
* @private
*/
normalizeParams (paramsList) {
return paramsList.map((params) => {
Object.keys(params).forEach((key) => {
var value = params[key];
if (value.length > 1) {
throw new Error(`Multiple extension parameters for ${key}`);
}
value = value[0];
switch (key) {
case 'server_no_context_takeover':
case 'client_no_context_takeover':
if (value !== true) {
throw new Error(`invalid extension parameter value for ${key} (${value})`);
}
params[key] = true;
break;
case 'server_max_window_bits':
case 'client_max_window_bits':
if (typeof value === 'string') {
value = parseInt(value, 10);
if (!~AVAILABLE_WINDOW_BITS.indexOf(value)) {
throw new Error(`invalid extension parameter value for ${key} (${value})`);
}
}
if (!this._isServer && value === true) {
throw new Error(`Missing extension parameter value for ${key}`);
}
params[key] = value;
break;
default:
throw new Error(`Not defined extension parameter (${key})`);
}
});
return params;
});
}
/**
* Decompress data.
*
* @param {Buffer} data Compressed data
* @param {Boolean} fin Specifies whether or not this is the last fragment
* @param {Function} callback Callback
* @public
*/
decompress (data, fin, callback) {
const endpoint = this._isServer ? 'client' : 'server';
if (!this._inflate) {
const maxWindowBits = this.params[`${endpoint}_max_window_bits`];
this._inflate = zlib.createInflateRaw({
windowBits: typeof maxWindowBits === 'number' ? maxWindowBits : DEFAULT_WINDOW_BITS
});
}
this._inflate.writeInProgress = true;
var totalLength = 0;
const buffers = [];
var err;
const onData = (data) => {
totalLength += data.length;
if (this._maxPayload < 1 || totalLength <= this._maxPayload) {
return buffers.push(data);
}
err = new Error('max payload size exceeded');
err.closeCode = 1009;
this._inflate.reset();
};
const onError = (err) => {
cleanup();
callback(err);
};
const cleanup = () => {
if (!this._inflate) return;
this._inflate.removeListener('error', onError);
this._inflate.removeListener('data', onData);
this._inflate.writeInProgress = false;
if (
(fin && this.params[`${endpoint}_no_context_takeover`]) ||
this._inflate.pendingClose
) {
this._inflate.close();
this._inflate = null;
}
};
this._inflate.on('error', onError).on('data', onData);
this._inflate.write(data);
if (fin) this._inflate.write(TRAILER);
this._inflate.flush(() => {
cleanup();
if (err) callback(err);
else callback(null, bufferUtil.concat(buffers, totalLength));
});
}
/**
* Compress data.
*
* @param {Buffer} data Data to compress
* @param {Boolean} fin Specifies whether or not this is the last fragment
* @param {Function} callback Callback
* @public
*/
compress (data, fin, callback) {
if (!data || data.length === 0) {
process.nextTick(callback, null, EMPTY_BLOCK);
return;
}
const endpoint = this._isServer ? 'server' : 'client';
if (!this._deflate) {
const maxWindowBits = this.params[`${endpoint}_max_window_bits`];
this._deflate = zlib.createDeflateRaw({
flush: zlib.Z_SYNC_FLUSH,
windowBits: typeof maxWindowBits === 'number' ? maxWindowBits : DEFAULT_WINDOW_BITS,
memLevel: this._options.memLevel || DEFAULT_MEM_LEVEL
});
}
this._deflate.writeInProgress = true;
var totalLength = 0;
const buffers = [];
const onData = (data) => {
totalLength += data.length;
buffers.push(data);
};
const onError = (err) => {
cleanup();
callback(err);
};
const cleanup = () => {
if (!this._deflate) return;
this._deflate.removeListener('error', onError);
this._deflate.removeListener('data', onData);
this._deflate.writeInProgress = false;
if (
(fin && this.params[`${endpoint}_no_context_takeover`]) ||
this._deflate.pendingClose
) {
this._deflate.close();
this._deflate = null;
}
};
this._deflate.on('error', onError).on('data', onData);
this._deflate.write(data);
this._deflate.flush(zlib.Z_SYNC_FLUSH, () => {
cleanup();
var data = bufferUtil.concat(buffers, totalLength);
if (fin) data = data.slice(0, data.length - 4);
callback(null, data);
});
}
}
module.exports = PerMessageDeflate;

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/*!
* ws: a node.js websocket client
* Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
* MIT Licensed
*/
'use strict';
const safeBuffer = require('safe-buffer');
const PerMessageDeflate = require('./PerMessageDeflate');
const isValidUTF8 = require('./Validation');
const bufferUtil = require('./BufferUtil');
const ErrorCodes = require('./ErrorCodes');
const constants = require('./Constants');
const Buffer = safeBuffer.Buffer;
const GET_INFO = 0;
const GET_PAYLOAD_LENGTH_16 = 1;
const GET_PAYLOAD_LENGTH_64 = 2;
const GET_MASK = 3;
const GET_DATA = 4;
const INFLATING = 5;
/**
* HyBi Receiver implementation.
*/
class Receiver {
/**
* Creates a Receiver instance.
*
* @param {Object} extensions An object containing the negotiated extensions
* @param {Number} maxPayload The maximum allowed message length
* @param {String} binaryType The type for binary data
*/
constructor (extensions, maxPayload, binaryType) {
this.binaryType = binaryType || constants.BINARY_TYPES[0];
this.extensions = extensions || {};
this.maxPayload = maxPayload | 0;
this.bufferedBytes = 0;
this.buffers = [];
this.compressed = false;
this.payloadLength = 0;
this.fragmented = 0;
this.masked = false;
this.fin = false;
this.mask = null;
this.opcode = 0;
this.totalPayloadLength = 0;
this.messageLength = 0;
this.fragments = [];
this.cleanupCallback = null;
this.hadError = false;
this.dead = false;
this.loop = false;
this.onmessage = null;
this.onclose = null;
this.onerror = null;
this.onping = null;
this.onpong = null;
this.state = GET_INFO;
}
/**
* Consumes bytes from the available buffered data.
*
* @param {Number} bytes The number of bytes to consume
* @return {Buffer} Consumed bytes
* @private
*/
readBuffer (bytes) {
var offset = 0;
var dst;
var l;
this.bufferedBytes -= bytes;
if (bytes === this.buffers[0].length) return this.buffers.shift();
if (bytes < this.buffers[0].length) {
dst = this.buffers[0].slice(0, bytes);
this.buffers[0] = this.buffers[0].slice(bytes);
return dst;
}
dst = Buffer.allocUnsafe(bytes);
while (bytes > 0) {
l = this.buffers[0].length;
if (bytes >= l) {
this.buffers[0].copy(dst, offset);
offset += l;
this.buffers.shift();
} else {
this.buffers[0].copy(dst, offset, 0, bytes);
this.buffers[0] = this.buffers[0].slice(bytes);
}
bytes -= l;
}
return dst;
}
/**
* Checks if the number of buffered bytes is bigger or equal than `n` and
* calls `cleanup` if necessary.
*
* @param {Number} n The number of bytes to check against
* @return {Boolean} `true` if `bufferedBytes >= n`, else `false`
* @private
*/
hasBufferedBytes (n) {
if (this.bufferedBytes >= n) return true;
this.loop = false;
if (this.dead) this.cleanup(this.cleanupCallback);
return false;
}
/**
* Adds new data to the parser.
*
* @public
*/
add (data) {
if (this.dead) return;
this.bufferedBytes += data.length;
this.buffers.push(data);
this.startLoop();
}
/**
* Starts the parsing loop.
*
* @private
*/
startLoop () {
this.loop = true;
while (this.loop) {
switch (this.state) {
case GET_INFO:
this.getInfo();
break;
case GET_PAYLOAD_LENGTH_16:
this.getPayloadLength16();
break;
case GET_PAYLOAD_LENGTH_64:
this.getPayloadLength64();
break;
case GET_MASK:
this.getMask();
break;
case GET_DATA:
this.getData();
break;
default: // `INFLATING`
this.loop = false;
}
}
}
/**
* Reads the first two bytes of a frame.
*
* @private
*/
getInfo () {
if (!this.hasBufferedBytes(2)) return;
const buf = this.readBuffer(2);
if ((buf[0] & 0x30) !== 0x00) {
this.error(new Error('RSV2 and RSV3 must be clear'), 1002);
return;
}
const compressed = (buf[0] & 0x40) === 0x40;
if (compressed && !this.extensions[PerMessageDeflate.extensionName]) {
this.error(new Error('RSV1 must be clear'), 1002);
return;
}
this.fin = (buf[0] & 0x80) === 0x80;
this.opcode = buf[0] & 0x0f;
this.payloadLength = buf[1] & 0x7f;
if (this.opcode === 0x00) {
if (compressed) {
this.error(new Error('RSV1 must be clear'), 1002);
return;
}
if (!this.fragmented) {
this.error(new Error(`invalid opcode: ${this.opcode}`), 1002);
return;
} else {
this.opcode = this.fragmented;
}
} else if (this.opcode === 0x01 || this.opcode === 0x02) {
if (this.fragmented) {
this.error(new Error(`invalid opcode: ${this.opcode}`), 1002);
return;
}
this.compressed = compressed;
} else if (this.opcode > 0x07 && this.opcode < 0x0b) {
if (!this.fin) {
this.error(new Error('FIN must be set'), 1002);
return;
}
if (compressed) {
this.error(new Error('RSV1 must be clear'), 1002);
return;
}
if (this.payloadLength > 0x7d) {
this.error(new Error('invalid payload length'), 1002);
return;
}
} else {
this.error(new Error(`invalid opcode: ${this.opcode}`), 1002);
return;
}
if (!this.fin && !this.fragmented) this.fragmented = this.opcode;
this.masked = (buf[1] & 0x80) === 0x80;
if (this.payloadLength === 126) this.state = GET_PAYLOAD_LENGTH_16;
else if (this.payloadLength === 127) this.state = GET_PAYLOAD_LENGTH_64;
else this.haveLength();
}
/**
* Gets extended payload length (7+16).
*
* @private
*/
getPayloadLength16 () {
if (!this.hasBufferedBytes(2)) return;
this.payloadLength = this.readBuffer(2).readUInt16BE(0, true);
this.haveLength();
}
/**
* Gets extended payload length (7+64).
*
* @private
*/
getPayloadLength64 () {
if (!this.hasBufferedBytes(8)) return;
const buf = this.readBuffer(8);
const num = buf.readUInt32BE(0, true);
//
// The maximum safe integer in JavaScript is 2^53 - 1. An error is returned
// if payload length is greater than this number.
//
if (num > Math.pow(2, 53 - 32) - 1) {
this.error(new Error('max payload size exceeded'), 1009);
return;
}
this.payloadLength = (num * Math.pow(2, 32)) + buf.readUInt32BE(4, true);
this.haveLength();
}
/**
* Payload length has been read.
*
* @private
*/
haveLength () {
if (this.opcode < 0x08 && this.maxPayloadExceeded(this.payloadLength)) {
return;
}
if (this.masked) this.state = GET_MASK;
else this.state = GET_DATA;
}
/**
* Reads mask bytes.
*
* @private
*/
getMask () {
if (!this.hasBufferedBytes(4)) return;
this.mask = this.readBuffer(4);
this.state = GET_DATA;
}
/**
* Reads data bytes.
*
* @private
*/
getData () {
var data = constants.EMPTY_BUFFER;
if (this.payloadLength) {
if (!this.hasBufferedBytes(this.payloadLength)) return;
data = this.readBuffer(this.payloadLength);
if (this.masked) bufferUtil.unmask(data, this.mask);
}
if (this.opcode > 0x07) {
this.controlMessage(data);
} else if (this.compressed) {
this.state = INFLATING;
this.decompress(data);
} else if (this.pushFragment(data)) {
this.dataMessage();
}
}
/**
* Decompresses data.
*
* @param {Buffer} data Compressed data
* @private
*/
decompress (data) {
const extension = this.extensions[PerMessageDeflate.extensionName];
extension.decompress(data, this.fin, (err, buf) => {
if (err) {
this.error(err, err.closeCode === 1009 ? 1009 : 1007);
return;
}
if (this.pushFragment(buf)) this.dataMessage();
this.startLoop();
});
}
/**
* Handles a data message.
*
* @private
*/
dataMessage () {
if (this.fin) {
const messageLength = this.messageLength;
const fragments = this.fragments;
this.totalPayloadLength = 0;
this.messageLength = 0;
this.fragmented = 0;
this.fragments = [];
if (this.opcode === 2) {
var data;
if (this.binaryType === 'nodebuffer') {
data = toBuffer(fragments, messageLength);
} else if (this.binaryType === 'arraybuffer') {
data = toArrayBuffer(toBuffer(fragments, messageLength));
} else {
data = fragments;
}
this.onmessage(data, { masked: this.masked, binary: true });
} else {
const buf = toBuffer(fragments, messageLength);
if (!isValidUTF8(buf)) {
this.error(new Error('invalid utf8 sequence'), 1007);
return;
}
this.onmessage(buf.toString(), { masked: this.masked });
}
}
this.state = GET_INFO;
}
/**
* Handles a control message.
*
* @param {Buffer} data Data to handle
* @private
*/
controlMessage (data) {
if (this.opcode === 0x08) {
if (data.length === 0) {
this.onclose(1000, '', { masked: this.masked });
this.loop = false;
this.cleanup(this.cleanupCallback);
} else if (data.length === 1) {
this.error(new Error('invalid payload length'), 1002);
} else {
const code = data.readUInt16BE(0, true);
if (!ErrorCodes.isValidErrorCode(code)) {
this.error(new Error(`invalid status code: ${code}`), 1002);
return;
}
const buf = data.slice(2);
if (!isValidUTF8(buf)) {
this.error(new Error('invalid utf8 sequence'), 1007);
return;
}
this.onclose(code, buf.toString(), { masked: this.masked });
this.loop = false;
this.cleanup(this.cleanupCallback);
}
return;
}
const flags = { masked: this.masked, binary: true };
if (this.opcode === 0x09) this.onping(data, flags);
else this.onpong(data, flags);
this.state = GET_INFO;
}
/**
* Handles an error.
*
* @param {Error} err The error
* @param {Number} code Close code
* @private
*/
error (err, code) {
this.onerror(err, code);
this.hadError = true;
this.loop = false;
this.cleanup(this.cleanupCallback);
}
/**
* Checks payload size, disconnects socket when it exceeds `maxPayload`.
*
* @param {Number} length Payload length
* @private
*/
maxPayloadExceeded (length) {
if (length === 0 || this.maxPayload < 1) return false;
const fullLength = this.totalPayloadLength + length;
if (fullLength <= this.maxPayload) {
this.totalPayloadLength = fullLength;
return false;
}
this.error(new Error('max payload size exceeded'), 1009);
return true;
}
/**
* Appends a fragment in the fragments array after checking that the sum of
* fragment lengths does not exceed `maxPayload`.
*
* @param {Buffer} fragment The fragment to add
* @return {Boolean} `true` if `maxPayload` is not exceeded, else `false`
* @private
*/
pushFragment (fragment) {
if (fragment.length === 0) return true;
const totalLength = this.messageLength + fragment.length;
if (this.maxPayload < 1 || totalLength <= this.maxPayload) {
this.messageLength = totalLength;
this.fragments.push(fragment);
return true;
}
this.error(new Error('max payload size exceeded'), 1009);
return false;
}
/**
* Releases resources used by the receiver.
*
* @param {Function} cb Callback
* @public
*/
cleanup (cb) {
this.dead = true;
if (!this.hadError && (this.loop || this.state === INFLATING)) {
this.cleanupCallback = cb;
} else {
this.extensions = null;
this.fragments = null;
this.buffers = null;
this.mask = null;
this.cleanupCallback = null;
this.onmessage = null;
this.onclose = null;
this.onerror = null;
this.onping = null;
this.onpong = null;
if (cb) cb();
}
}
}
module.exports = Receiver;
/**
* Makes a buffer from a list of fragments.
*
* @param {Buffer[]} fragments The list of fragments composing the message
* @param {Number} messageLength The length of the message
* @return {Buffer}
* @private
*/
function toBuffer (fragments, messageLength) {
if (fragments.length === 1) return fragments[0];
if (fragments.length > 1) return bufferUtil.concat(fragments, messageLength);
return constants.EMPTY_BUFFER;
}
/**
* Converts a buffer to an `ArrayBuffer`.
*
* @param {Buffer} The buffer to convert
* @return {ArrayBuffer} Converted buffer
*/
function toArrayBuffer (buf) {
if (buf.byteOffset === 0 && buf.byteLength === buf.buffer.byteLength) {
return buf.buffer;
}
return buf.buffer.slice(buf.byteOffset, buf.byteOffset + buf.byteLength);
}

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node_modules/ws/lib/Sender.js generated vendored Normal file
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/*!
* ws: a node.js websocket client
* Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
* MIT Licensed
*/
'use strict';
const safeBuffer = require('safe-buffer');
const crypto = require('crypto');
const PerMessageDeflate = require('./PerMessageDeflate');
const bufferUtil = require('./BufferUtil');
const ErrorCodes = require('./ErrorCodes');
const Buffer = safeBuffer.Buffer;
/**
* HyBi Sender implementation.
*/
class Sender {
/**
* Creates a Sender instance.
*
* @param {net.Socket} socket The connection socket
* @param {Object} extensions An object containing the negotiated extensions
*/
constructor (socket, extensions) {
this.perMessageDeflate = (extensions || {})[PerMessageDeflate.extensionName];
this._socket = socket;
this.firstFragment = true;
this.compress = false;
this.bufferedBytes = 0;
this.deflating = false;
this.queue = [];
this.onerror = null;
}
/**
* Frames a piece of data according to the HyBi WebSocket protocol.
*
* @param {Buffer} data The data to frame
* @param {Object} options Options object
* @param {Number} options.opcode The opcode
* @param {Boolean} options.readOnly Specifies whether `data` can be modified
* @param {Boolean} options.fin Specifies whether or not to set the FIN bit
* @param {Boolean} options.mask Specifies whether or not to mask `data`
* @param {Boolean} options.rsv1 Specifies whether or not to set the RSV1 bit
* @return {Buffer[]} The framed data as a list of `Buffer` instances
* @public
*/
static frame (data, options) {
const merge = data.length < 1024 || (options.mask && options.readOnly);
var offset = options.mask ? 6 : 2;
var payloadLength = data.length;
if (data.length >= 65536) {
offset += 8;
payloadLength = 127;
} else if (data.length > 125) {
offset += 2;
payloadLength = 126;
}
const target = Buffer.allocUnsafe(merge ? data.length + offset : offset);
target[0] = options.fin ? options.opcode | 0x80 : options.opcode;
if (options.rsv1) target[0] |= 0x40;
if (payloadLength === 126) {
target.writeUInt16BE(data.length, 2, true);
} else if (payloadLength === 127) {
target.writeUInt32BE(0, 2, true);
target.writeUInt32BE(data.length, 6, true);
}
if (!options.mask) {
target[1] = payloadLength;
if (merge) {
data.copy(target, offset);
return [target];
}
return [target, data];
}
const mask = crypto.randomBytes(4);
target[1] = payloadLength | 0x80;
target[offset - 4] = mask[0];
target[offset - 3] = mask[1];
target[offset - 2] = mask[2];
target[offset - 1] = mask[3];
if (merge) {
bufferUtil.mask(data, mask, target, offset, data.length);
return [target];
}
bufferUtil.mask(data, mask, data, 0, data.length);
return [target, data];
}
/**
* Sends a close message to the other peer.
*
* @param {(Number|undefined)} code The status code component of the body
* @param {String} data The message component of the body
* @param {Boolean} mask Specifies whether or not to mask the message
* @param {Function} cb Callback
* @public
*/
close (code, data, mask, cb) {
if (code !== undefined && (typeof code !== 'number' || !ErrorCodes.isValidErrorCode(code))) {
throw new Error('first argument must be a valid error code number');
}
const buf = Buffer.allocUnsafe(2 + (data ? Buffer.byteLength(data) : 0));
buf.writeUInt16BE(code || 1000, 0, true);
if (buf.length > 2) buf.write(data, 2);
if (this.deflating) {
this.enqueue([this.doClose, buf, mask, cb]);
} else {
this.doClose(buf, mask, cb);
}
}
/**
* Frames and sends a close message.
*
* @param {Buffer} data The message to send
* @param {Boolean} mask Specifies whether or not to mask `data`
* @param {Function} cb Callback
* @private
*/
doClose (data, mask, cb) {
this.sendFrame(Sender.frame(data, {
readOnly: false,
opcode: 0x08,
rsv1: false,
fin: true,
mask
}), cb);
}
/**
* Sends a ping message to the other peer.
*
* @param {*} data The message to send
* @param {Boolean} mask Specifies whether or not to mask `data`
* @public
*/
ping (data, mask) {
var readOnly = true;
if (!Buffer.isBuffer(data)) {
if (data instanceof ArrayBuffer) {
data = Buffer.from(data);
} else if (ArrayBuffer.isView(data)) {
data = viewToBuffer(data);
} else {
data = Buffer.from(data);
readOnly = false;
}
}
if (this.deflating) {
this.enqueue([this.doPing, data, mask, readOnly]);
} else {
this.doPing(data, mask, readOnly);
}
}
/**
* Frames and sends a ping message.
*
* @param {*} data The message to send
* @param {Boolean} mask Specifies whether or not to mask `data`
* @param {Boolean} readOnly Specifies whether `data` can be modified
* @private
*/
doPing (data, mask, readOnly) {
this.sendFrame(Sender.frame(data, {
opcode: 0x09,
rsv1: false,
fin: true,
readOnly,
mask
}));
}
/**
* Sends a pong message to the other peer.
*
* @param {*} data The message to send
* @param {Boolean} mask Specifies whether or not to mask `data`
* @public
*/
pong (data, mask) {
var readOnly = true;
if (!Buffer.isBuffer(data)) {
if (data instanceof ArrayBuffer) {
data = Buffer.from(data);
} else if (ArrayBuffer.isView(data)) {
data = viewToBuffer(data);
} else {
data = Buffer.from(data);
readOnly = false;
}
}
if (this.deflating) {
this.enqueue([this.doPong, data, mask, readOnly]);
} else {
this.doPong(data, mask, readOnly);
}
}
/**
* Frames and sends a pong message.
*
* @param {*} data The message to send
* @param {Boolean} mask Specifies whether or not to mask `data`
* @param {Boolean} readOnly Specifies whether `data` can be modified
* @private
*/
doPong (data, mask, readOnly) {
this.sendFrame(Sender.frame(data, {
opcode: 0x0a,
rsv1: false,
fin: true,
readOnly,
mask
}));
}
/**
* Sends a data message to the other peer.
*
* @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
* @public
*/
send (data, options, cb) {
var opcode = options.binary ? 2 : 1;
var rsv1 = options.compress;
var readOnly = true;
if (!Buffer.isBuffer(data)) {
if (data instanceof ArrayBuffer) {
data = Buffer.from(data);
} else if (ArrayBuffer.isView(data)) {
data = viewToBuffer(data);
} else {
data = Buffer.from(data);
readOnly = false;
}
}
if (this.firstFragment) {
this.firstFragment = false;
if (rsv1 && this.perMessageDeflate) {
rsv1 = data.length >= this.perMessageDeflate.threshold;
}
this.compress = rsv1;
} else {
rsv1 = false;
opcode = 0;
}
if (options.fin) this.firstFragment = true;
if (this.perMessageDeflate) {
const opts = {
compress: this.compress,
mask: options.mask,
fin: options.fin,
readOnly,
opcode,
rsv1
};
if (this.deflating) {
this.enqueue([this.dispatch, data, opts, cb]);
} else {
this.dispatch(data, opts, cb);
}
} else {
this.sendFrame(Sender.frame(data, {
mask: options.mask,
fin: options.fin,
rsv1: false,
readOnly,
opcode
}), cb);
}
}
/**
* Dispatches a data message.
*
* @param {Buffer} data The message to send
* @param {Object} options Options object
* @param {Number} options.opcode The opcode
* @param {Boolean} options.readOnly Specifies whether `data` can be modified
* @param {Boolean} options.fin Specifies whether or not to set the FIN bit
* @param {Boolean} options.compress Specifies whether or not to compress `data`
* @param {Boolean} options.mask Specifies whether or not to mask `data`
* @param {Boolean} options.rsv1 Specifies whether or not to set the RSV1 bit
* @param {Function} cb Callback
* @private
*/
dispatch (data, options, cb) {
if (!options.compress) {
this.sendFrame(Sender.frame(data, options), cb);
return;
}
this.deflating = true;
this.perMessageDeflate.compress(data, options.fin, (err, buf) => {
if (err) {
if (cb) cb(err);
else this.onerror(err);
return;
}
options.readOnly = false;
this.sendFrame(Sender.frame(buf, options), cb);
this.deflating = false;
this.dequeue();
});
}
/**
* Executes queued send operations.
*
* @private
*/
dequeue () {
while (!this.deflating && this.queue.length) {
const params = this.queue.shift();
this.bufferedBytes -= params[1].length;
params[0].apply(this, params.slice(1));
}
}
/**
* Enqueues a send operation.
*
* @param {Array} params Send operation parameters.
* @private
*/
enqueue (params) {
this.bufferedBytes += params[1].length;
this.queue.push(params);
}
/**
* Sends a frame.
*
* @param {Buffer[]} list The frame to send
* @param {Function} cb Callback
* @private
*/
sendFrame (list, cb) {
if (list.length === 2) {
this._socket.write(list[0]);
this._socket.write(list[1], cb);
} else {
this._socket.write(list[0], cb);
}
}
}
module.exports = Sender;
/**
* Converts an `ArrayBuffer` view into a buffer.
*
* @param {(DataView|TypedArray)} view The view to convert
* @return {Buffer} Converted view
* @private
*/
function viewToBuffer (view) {
const buf = Buffer.from(view.buffer);
if (view.byteLength !== view.buffer.byteLength) {
return buf.slice(view.byteOffset, view.byteOffset + view.byteLength);
}
return buf;
}

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node_modules/ws/lib/Validation.js generated vendored Normal file
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/*!
* ws: a node.js websocket client
* Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
* MIT Licensed
*/
'use strict';
try {
const isValidUTF8 = require('utf-8-validate');
module.exports = typeof isValidUTF8 === 'object'
? isValidUTF8.Validation.isValidUTF8 // utf-8-validate@<3.0.0
: isValidUTF8;
} catch (e) /* istanbul ignore next */ {
module.exports = () => true;
}

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node_modules/ws/lib/WebSocket.js generated vendored Normal file
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/*!
* ws: a node.js websocket client
* Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
* MIT Licensed
*/
'use strict';
const EventEmitter = require('events');
const crypto = require('crypto');
const Ultron = require('ultron');
const https = require('https');
const http = require('http');
const url = require('url');
const PerMessageDeflate = require('./PerMessageDeflate');
const EventTarget = require('./EventTarget');
const Extensions = require('./Extensions');
const constants = require('./Constants');
const Receiver = require('./Receiver');
const Sender = require('./Sender');
const protocolVersions = [8, 13];
const closeTimeout = 30 * 1000; // Allow 30 seconds to terminate the connection cleanly.
/**
* Class representing a WebSocket.
*
* @extends EventEmitter
*/
class WebSocket extends EventEmitter {
/**
* Create a new `WebSocket`.
*
* @param {String} address The URL to which to connect
* @param {(String|String[])} protocols The subprotocols
* @param {Object} options Connection options
*/
constructor (address, protocols, options) {
super();
if (!protocols) {
protocols = [];
} else if (typeof protocols === 'string') {
protocols = [protocols];
} else if (!Array.isArray(protocols)) {
options = protocols;
protocols = [];
}
this.readyState = WebSocket.CONNECTING;
this.bytesReceived = 0;
this.extensions = {};
this.protocol = '';
this._binaryType = constants.BINARY_TYPES[0];
this._finalize = this.finalize.bind(this);
this._finalizeCalled = false;
this._closeMessage = null;
this._closeTimer = null;
this._closeCode = null;
this._receiver = null;
this._sender = null;
this._socket = null;
this._ultron = null;
if (Array.isArray(address)) {
initAsServerClient.call(this, address[0], address[1], address[2], options);
} else {
initAsClient.call(this, address, protocols, options);
}
}
get CONNECTING () { return WebSocket.CONNECTING; }
get CLOSING () { return WebSocket.CLOSING; }
get CLOSED () { return WebSocket.CLOSED; }
get OPEN () { return WebSocket.OPEN; }
/**
* @type {Number}
*/
get bufferedAmount () {
var amount = 0;
if (this._socket) {
amount = this._socket.bufferSize + this._sender.bufferedBytes;
}
return amount;
}
/**
* 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 (constants.BINARY_TYPES.indexOf(type) < 0) return;
this._binaryType = type;
//
// Allow to change `binaryType` on the fly.
//
if (this._receiver) this._receiver.binaryType = type;
}
/**
* 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
* @private
*/
setSocket (socket, head) {
socket.setTimeout(0);
socket.setNoDelay();
this._receiver = new Receiver(this.extensions, this.maxPayload, this.binaryType);
this._sender = new Sender(socket, this.extensions);
this._ultron = new Ultron(socket);
this._socket = socket;
// socket cleanup handlers
this._ultron.on('close', this._finalize);
this._ultron.on('error', this._finalize);
this._ultron.on('end', this._finalize);
// ensure that the head is added to the receiver
if (head && head.length > 0) {
socket.unshift(head);
head = null;
}
// subsequent packets are pushed to the receiver
this._ultron.on('data', (data) => {
this.bytesReceived += data.length;
this._receiver.add(data);
});
// receiver event handlers
this._receiver.onmessage = (data, flags) => this.emit('message', data, flags);
this._receiver.onping = (data, flags) => {
this.pong(data, !this._isServer, true);
this.emit('ping', data, flags);
};
this._receiver.onpong = (data, flags) => this.emit('pong', data, flags);
this._receiver.onclose = (code, reason) => {
this._closeMessage = reason;
this._closeCode = code;
this.close(code, reason);
};
this._receiver.onerror = (error, code) => {
// close the connection when the receiver reports a HyBi error code
this.close(code, '');
this.emit('error', error);
};
// sender event handlers
this._sender.onerror = (error) => {
this.close(1002, '');
this.emit('error', error);
};
this.readyState = WebSocket.OPEN;
this.emit('open');
}
/**
* Clean up and release internal resources.
*
* @param {(Boolean|Error)} Indicates whether or not an error occurred
* @private
*/
finalize (error) {
if (this._finalizeCalled) return;
this.readyState = WebSocket.CLOSING;
this._finalizeCalled = true;
clearTimeout(this._closeTimer);
this._closeTimer = null;
//
// If the connection was closed abnormally (with an error), or if the close
// control frame was malformed or not received then the close code must be
// 1006.
//
if (error) this._closeCode = 1006;
if (this._socket) {
this._ultron.destroy();
this._socket.on('error', function onerror () {
this.destroy();
});
if (!error) this._socket.end();
else this._socket.destroy();
this._socket = null;
this._ultron = null;
}
if (this._sender) {
this._sender = this._sender.onerror = null;
}
if (this._receiver) {
this._receiver.cleanup(() => this.emitClose());
this._receiver = null;
} else {
this.emitClose();
}
}
/**
* Emit the `close` event.
*
* @private
*/
emitClose () {
this.readyState = WebSocket.CLOSED;
this.emit('close', this._closeCode || 1006, this._closeMessage || '');
if (this.extensions[PerMessageDeflate.extensionName]) {
this.extensions[PerMessageDeflate.extensionName].cleanup();
}
this.extensions = null;
this.removeAllListeners();
this.on('error', constants.NOOP); // Catch all errors after this.
}
/**
* Pause the socket stream.
*
* @public
*/
pause () {
if (this.readyState !== WebSocket.OPEN) throw new Error('not opened');
this._socket.pause();
}
/**
* Resume the socket stream
*
* @public
*/
resume () {
if (this.readyState !== WebSocket.OPEN) throw new Error('not opened');
this._socket.resume();
}
/**
* Start a closing handshake.
*
* @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) {
if (this._req && !this._req.aborted) {
this._req.abort();
this.emit('error', new Error('closed before the connection is established'));
this.finalize(true);
}
return;
}
if (this.readyState === WebSocket.CLOSING) {
if (this._closeCode && this._socket) this._socket.end();
return;
}
this.readyState = WebSocket.CLOSING;
this._sender.close(code, data, !this._isServer, (err) => {
if (err) this.emit('error', err);
if (this._socket) {
if (this._closeCode) this._socket.end();
//
// Ensure that the connection is cleaned up even when the closing
// handshake fails.
//
clearTimeout(this._closeTimer);
this._closeTimer = setTimeout(this._finalize, closeTimeout, true);
}
});
}
/**
* Send a ping message.
*
* @param {*} data The message to send
* @param {Boolean} mask Indicates whether or not to mask `data`
* @param {Boolean} failSilently Indicates whether or not to throw if `readyState` isn't `OPEN`
* @public
*/
ping (data, mask, failSilently) {
if (this.readyState !== WebSocket.OPEN) {
if (failSilently) return;
throw new Error('not opened');
}
if (typeof data === 'number') data = data.toString();
if (mask === undefined) mask = !this._isServer;
this._sender.ping(data || constants.EMPTY_BUFFER, mask);
}
/**
* Send a pong message.
*
* @param {*} data The message to send
* @param {Boolean} mask Indicates whether or not to mask `data`
* @param {Boolean} failSilently Indicates whether or not to throw if `readyState` isn't `OPEN`
* @public
*/
pong (data, mask, failSilently) {
if (this.readyState !== WebSocket.OPEN) {
if (failSilently) return;
throw new Error('not opened');
}
if (typeof data === 'number') data = data.toString();
if (mask === undefined) mask = !this._isServer;
this._sender.pong(data || constants.EMPTY_BUFFER, mask);
}
/**
* 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) {
if (cb) cb(new Error('not opened'));
else throw new Error('not opened');
return;
}
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 || constants.EMPTY_BUFFER, opts, cb);
}
/**
* Forcibly close the connection.
*
* @public
*/
terminate () {
if (this.readyState === WebSocket.CLOSED) return;
if (this.readyState === WebSocket.CONNECTING) {
if (this._req && !this._req.aborted) {
this._req.abort();
this.emit('error', new Error('closed before the connection is established'));
this.finalize(true);
}
return;
}
this.finalize(true);
}
}
WebSocket.CONNECTING = 0;
WebSocket.OPEN = 1;
WebSocket.CLOSING = 2;
WebSocket.CLOSED = 3;
//
// 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;
}
},
/**
* 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 server client.
*
* @param {http.IncomingMessage} req The request object
* @param {net.Socket} socket The network socket between the server and client
* @param {Buffer} head The first packet of the upgraded stream
* @param {Object} options WebSocket attributes
* @param {Number} options.protocolVersion The WebSocket protocol version
* @param {Object} options.extensions The negotiated extensions
* @param {Number} options.maxPayload The maximum allowed message size
* @param {String} options.protocol The chosen subprotocol
* @private
*/
function initAsServerClient (req, socket, head, options) {
this.protocolVersion = options.protocolVersion;
this.extensions = options.extensions;
this.maxPayload = options.maxPayload;
this.protocol = options.protocol;
this.upgradeReq = req;
this._isServer = true;
this.setSocket(socket, head);
}
/**
* Initialize a WebSocket client.
*
* @param {String} address The URL to which to connect
* @param {String[]} protocols The list of subprotocols
* @param {Object} options Connection options
* @param {String} options.protocol Value of the `Sec-WebSocket-Protocol` header
* @param {(Boolean|Object)} options.perMessageDeflate Enable/disable permessage-deflate
* @param {String} options.localAddress Local interface to bind for network connections
* @param {Number} options.protocolVersion Value of the `Sec-WebSocket-Version` header
* @param {Object} options.headers An object containing request headers
* @param {String} options.origin Value of the `Origin` or `Sec-WebSocket-Origin` header
* @param {http.Agent} options.agent Use the specified Agent
* @param {String} options.host Value of the `Host` header
* @param {Number} options.family IP address family to use during hostname lookup (4 or 6).
* @param {Function} options.checkServerIdentity A function to validate the server hostname
* @param {Boolean} options.rejectUnauthorized Verify or not the server certificate
* @param {String} options.passphrase The passphrase for the private key or pfx
* @param {String} options.ciphers The ciphers to use or exclude
* @param {(String|String[]|Buffer|Buffer[])} options.cert The certificate key
* @param {(String|String[]|Buffer|Buffer[])} options.key The private key
* @param {(String|Buffer)} options.pfx The private key, certificate, and CA certs
* @param {(String|String[]|Buffer|Buffer[])} options.ca Trusted certificates
* @private
*/
function initAsClient (address, protocols, options) {
options = Object.assign({
protocolVersion: protocolVersions[1],
protocol: protocols.join(','),
perMessageDeflate: true,
localAddress: null,
headers: null,
family: null,
origin: null,
agent: null,
host: null,
//
// SSL options.
//
checkServerIdentity: null,
rejectUnauthorized: null,
passphrase: null,
ciphers: null,
cert: null,
key: null,
pfx: null,
ca: null
}, options);
if (protocolVersions.indexOf(options.protocolVersion) === -1) {
throw new Error(
`unsupported protocol version: ${options.protocolVersion} ` +
`(supported versions: ${protocolVersions.join(', ')})`
);
}
this.protocolVersion = options.protocolVersion;
this._isServer = false;
this.url = address;
const serverUrl = url.parse(address);
const isUnixSocket = serverUrl.protocol === 'ws+unix:';
if (!serverUrl.host && (!isUnixSocket || !serverUrl.path)) {
throw new Error('invalid url');
}
const isSecure = serverUrl.protocol === 'wss:' || serverUrl.protocol === 'https:';
const key = crypto.randomBytes(16).toString('base64');
const httpObj = isSecure ? https : http;
//
// Prepare extensions.
//
const extensionsOffer = {};
var perMessageDeflate;
if (options.perMessageDeflate) {
perMessageDeflate = new PerMessageDeflate(
options.perMessageDeflate !== true ? options.perMessageDeflate : {},
false
);
extensionsOffer[PerMessageDeflate.extensionName] = perMessageDeflate.offer();
}
const requestOptions = {
port: serverUrl.port || (isSecure ? 443 : 80),
host: serverUrl.hostname,
path: '/',
headers: {
'Sec-WebSocket-Version': options.protocolVersion,
'Sec-WebSocket-Key': key,
'Connection': 'Upgrade',
'Upgrade': 'websocket'
}
};
if (options.headers) Object.assign(requestOptions.headers, options.headers);
if (Object.keys(extensionsOffer).length) {
requestOptions.headers['Sec-WebSocket-Extensions'] = Extensions.format(extensionsOffer);
}
if (options.protocol) {
requestOptions.headers['Sec-WebSocket-Protocol'] = options.protocol;
}
if (options.origin) {
if (options.protocolVersion < 13) {
requestOptions.headers['Sec-WebSocket-Origin'] = options.origin;
} else {
requestOptions.headers.Origin = options.origin;
}
}
if (options.host) requestOptions.headers.Host = options.host;
if (serverUrl.auth) requestOptions.auth = serverUrl.auth;
if (options.localAddress) requestOptions.localAddress = options.localAddress;
if (options.family) requestOptions.family = options.family;
if (isUnixSocket) {
const parts = serverUrl.path.split(':');
requestOptions.socketPath = parts[0];
requestOptions.path = parts[1];
} else if (serverUrl.path) {
//
// Make sure that path starts with `/`.
//
if (serverUrl.path.charAt(0) !== '/') {
requestOptions.path = `/${serverUrl.path}`;
} else {
requestOptions.path = serverUrl.path;
}
}
var agent = options.agent;
//
// A custom agent is required for these options.
//
if (
options.rejectUnauthorized != null ||
options.checkServerIdentity ||
options.passphrase ||
options.ciphers ||
options.cert ||
options.key ||
options.pfx ||
options.ca
) {
if (options.passphrase) requestOptions.passphrase = options.passphrase;
if (options.ciphers) requestOptions.ciphers = options.ciphers;
if (options.cert) requestOptions.cert = options.cert;
if (options.key) requestOptions.key = options.key;
if (options.pfx) requestOptions.pfx = options.pfx;
if (options.ca) requestOptions.ca = options.ca;
if (options.checkServerIdentity) {
requestOptions.checkServerIdentity = options.checkServerIdentity;
}
if (options.rejectUnauthorized != null) {
requestOptions.rejectUnauthorized = options.rejectUnauthorized;
}
if (!agent) agent = new httpObj.Agent(requestOptions);
}
if (agent) requestOptions.agent = agent;
this._req = httpObj.get(requestOptions);
this._req.on('error', (error) => {
if (this._req.aborted) return;
this._req = null;
this.emit('error', error);
this.finalize(true);
});
this._req.on('response', (res) => {
if (!this.emit('unexpected-response', this._req, res)) {
this._req.abort();
this.emit('error', new Error(`unexpected server response (${res.statusCode})`));
this.finalize(true);
}
});
this._req.on('upgrade', (res, socket, head) => {
this._req = null;
const digest = crypto.createHash('sha1')
.update(key + constants.GUID, 'binary')
.digest('base64');
if (res.headers['sec-websocket-accept'] !== digest) {
socket.destroy();
this.emit('error', new Error('invalid server key'));
return this.finalize(true);
}
const serverProt = res.headers['sec-websocket-protocol'];
const protList = (options.protocol || '').split(/, */);
var protError;
if (!options.protocol && serverProt) {
protError = 'server sent a subprotocol even though none requested';
} else if (options.protocol && !serverProt) {
protError = 'server sent no subprotocol even though requested';
} else if (serverProt && protList.indexOf(serverProt) === -1) {
protError = 'server responded with an invalid protocol';
}
if (protError) {
socket.destroy();
this.emit('error', new Error(protError));
return this.finalize(true);
}
if (serverProt) this.protocol = serverProt;
const serverExtensions = Extensions.parse(res.headers['sec-websocket-extensions']);
if (perMessageDeflate && serverExtensions[PerMessageDeflate.extensionName]) {
try {
perMessageDeflate.accept(serverExtensions[PerMessageDeflate.extensionName]);
} catch (err) {
socket.destroy();
this.emit('error', new Error('invalid extension parameter'));
return this.finalize(true);
}
this.extensions[PerMessageDeflate.extensionName] = perMessageDeflate;
}
this.setSocket(socket, head);
});
}

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node_modules/ws/lib/WebSocketServer.js generated vendored Normal file
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/*!
* ws: a node.js websocket client
* Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com>
* MIT Licensed
*/
'use strict';
const safeBuffer = require('safe-buffer');
const EventEmitter = require('events');
const crypto = require('crypto');
const Ultron = require('ultron');
const http = require('http');
const url = require('url');
const PerMessageDeflate = require('./PerMessageDeflate');
const Extensions = require('./Extensions');
const constants = require('./Constants');
const WebSocket = require('./WebSocket');
const Buffer = safeBuffer.Buffer;
/**
* Class representing a WebSocket server.
*
* @extends EventEmitter
*/
class WebSocketServer extends EventEmitter {
/**
* Create a `WebSocketServer` instance.
*
* @param {Object} options Configuration options
* @param {String} options.host The hostname where to bind the server
* @param {Number} options.port The port where to bind the server
* @param {http.Server} options.server A pre-created HTTP/S server to use
* @param {Function} options.verifyClient An hook to reject connections
* @param {Function} options.handleProtocols An hook to handle protocols
* @param {String} options.path Accept only connections matching this path
* @param {Boolean} options.noServer Enable no server mode
* @param {Boolean} options.clientTracking Specifies whether or not to track clients
* @param {(Boolean|Object)} options.perMessageDeflate Enable/disable permessage-deflate
* @param {Number} options.maxPayload The maximum allowed message size
* @param {Function} callback A listener for the `listening` event
*/
constructor (options, callback) {
super();
options = Object.assign({
maxPayload: 100 * 1024 * 1024,
perMessageDeflate: true,
handleProtocols: null,
clientTracking: true,
verifyClient: null,
noServer: false,
backlog: null, // use default (511 as implemented in net.js)
server: null,
host: null,
path: null,
port: null
}, options);
if (options.port == null && !options.server && !options.noServer) {
throw new TypeError('missing or invalid options');
}
if (options.port != null) {
this._server = http.createServer((req, res) => {
const body = http.STATUS_CODES[426];
res.writeHead(426, {
'Content-Length': body.length,
'Content-Type': 'text/plain'
});
res.end(body);
});
this._server.allowHalfOpen = false;
this._server.listen(options.port, options.host, options.backlog, callback);
} else if (options.server) {
this._server = options.server;
}
if (this._server) {
this._ultron = new Ultron(this._server);
this._ultron.on('listening', () => this.emit('listening'));
this._ultron.on('error', (err) => this.emit('error', err));
this._ultron.on('upgrade', (req, socket, head) => {
this.handleUpgrade(req, socket, head, (client) => {
this.emit(`connection${req.url}`, client);
this.emit('connection', client);
});
});
}
if (options.clientTracking) this.clients = new Set();
this.options = options;
this.path = options.path;
}
/**
* Close the server.
*
* @param {Function} cb Callback
* @public
*/
close (cb) {
//
// Terminate all associated clients.
//
if (this.clients) {
for (const client of this.clients) client.terminate();
}
const server = this._server;
if (server) {
this._ultron.destroy();
this._ultron = this._server = null;
//
// Close the http server if it was internally created.
//
if (this.options.port != null) return server.close(cb);
}
if (cb) cb();
}
/**
* See if a given request should be handled by this server instance.
*
* @param {http.IncomingMessage} req Request object to inspect
* @return {Boolean} `true` if the request is valid, else `false`
* @public
*/
shouldHandle (req) {
if (this.options.path && url.parse(req.url).pathname !== this.options.path) {
return false;
}
return true;
}
/**
* Handle a HTTP Upgrade request.
*
* @param {http.IncomingMessage} req The request object
* @param {net.Socket} socket The network socket between the server and client
* @param {Buffer} head The first packet of the upgraded stream
* @param {Function} cb Callback
* @public
*/
handleUpgrade (req, socket, head, cb) {
socket.on('error', socketError);
const version = +req.headers['sec-websocket-version'];
if (
req.method !== 'GET' || req.headers.upgrade.toLowerCase() !== 'websocket' ||
!req.headers['sec-websocket-key'] || (version !== 8 && version !== 13) ||
!this.shouldHandle(req)
) {
return abortConnection(socket, 400);
}
var protocol = (req.headers['sec-websocket-protocol'] || '').split(/, */);
//
// Optionally call external protocol selection handler.
//
if (this.options.handleProtocols) {
protocol = this.options.handleProtocols(protocol);
if (protocol === false) return abortConnection(socket, 401);
} else {
protocol = protocol[0];
}
//
// Optionally call external client verification handler.
//
if (this.options.verifyClient) {
const info = {
origin: req.headers[`${version === 8 ? 'sec-websocket-origin' : 'origin'}`],
secure: !!(req.connection.authorized || req.connection.encrypted),
req
};
if (this.options.verifyClient.length === 2) {
this.options.verifyClient(info, (verified, code, message) => {
if (!verified) return abortConnection(socket, code || 401, message);
this.completeUpgrade(protocol, version, req, socket, head, cb);
});
return;
} else if (!this.options.verifyClient(info)) {
return abortConnection(socket, 401);
}
}
this.completeUpgrade(protocol, version, req, socket, head, cb);
}
/**
* Upgrade the connection to WebSocket.
*
* @param {String} protocol The chosen subprotocol
* @param {Number} version The WebSocket protocol version
* @param {http.IncomingMessage} req The request object
* @param {net.Socket} socket The network socket between the server and client
* @param {Buffer} head The first packet of the upgraded stream
* @param {Function} cb Callback
* @private
*/
completeUpgrade (protocol, version, req, socket, head, cb) {
//
// Destroy the socket if the client has already sent a FIN packet.
//
if (!socket.readable || !socket.writable) return socket.destroy();
const key = crypto.createHash('sha1')
.update(req.headers['sec-websocket-key'] + constants.GUID, 'binary')
.digest('base64');
const headers = [
'HTTP/1.1 101 Switching Protocols',
'Upgrade: websocket',
'Connection: Upgrade',
`Sec-WebSocket-Accept: ${key}`
];
if (protocol) headers.push(`Sec-WebSocket-Protocol: ${protocol}`);
const offer = Extensions.parse(req.headers['sec-websocket-extensions']);
var extensions;
try {
extensions = acceptExtensions(this.options, offer);
} catch (err) {
return abortConnection(socket, 400);
}
const props = Object.keys(extensions);
if (props.length) {
const serverExtensions = props.reduce((obj, key) => {
obj[key] = [extensions[key].params];
return obj;
}, {});
headers.push(`Sec-WebSocket-Extensions: ${Extensions.format(serverExtensions)}`);
}
//
// Allow external modification/inspection of handshake headers.
//
this.emit('headers', headers);
socket.write(headers.concat('', '').join('\r\n'));
const client = new WebSocket([req, socket, head], {
maxPayload: this.options.maxPayload,
protocolVersion: version,
extensions,
protocol
});
if (this.clients) {
this.clients.add(client);
client.on('close', () => this.clients.delete(client));
}
socket.removeListener('error', socketError);
cb(client);
}
}
module.exports = WebSocketServer;
/**
* Handle premature socket errors.
*
* @private
*/
function socketError () {
this.destroy();
}
/**
* Accept WebSocket extensions.
*
* @param {Object} options The `WebSocketServer` configuration options
* @param {Object} offer The parsed value of the `sec-websocket-extensions` header
* @return {Object} Accepted extensions
* @private
*/
function acceptExtensions (options, offer) {
const pmd = options.perMessageDeflate;
const extensions = {};
if (pmd && offer[PerMessageDeflate.extensionName]) {
const perMessageDeflate = new PerMessageDeflate(
pmd !== true ? pmd : {},
true,
options.maxPayload
);
perMessageDeflate.accept(offer[PerMessageDeflate.extensionName]);
extensions[PerMessageDeflate.extensionName] = perMessageDeflate;
}
return extensions;
}
/**
* Close the connection when preconditions are not fulfilled.
*
* @param {net.Socket} socket The socket of the upgrade request
* @param {Number} code The HTTP response status code
* @param {String} [message] The HTTP response body
* @private
*/
function abortConnection (socket, code, message) {
if (socket.writable) {
message = message || http.STATUS_CODES[code];
socket.write(
`HTTP/1.1 ${code} ${http.STATUS_CODES[code]}\r\n` +
'Connection: close\r\n' +
'Content-type: text/html\r\n' +
`Content-Length: ${Buffer.byteLength(message)}\r\n` +
'\r\n' +
message
);
}
socket.removeListener('error', socketError);
socket.destroy();
}

124
node_modules/ws/package.json generated vendored Normal file
View File

@@ -0,0 +1,124 @@
{
"_args": [
[
{
"raw": "ws",
"scope": null,
"escapedName": "ws",
"name": "ws",
"rawSpec": "",
"spec": "latest",
"type": "tag"
},
"/home/vincent/Projects/SublimeTextProjects/shadowsocks-over-websocket"
]
],
"_from": "ws@latest",
"_id": "ws@2.2.3",
"_inCache": true,
"_installable": true,
"_location": "/ws",
"_nodeVersion": "7.8.0",
"_npmOperationalInternal": {
"host": "packages-12-west.internal.npmjs.com",
"tmp": "tmp/ws-2.2.3.tgz_1491214217857_0.5180311135482043"
},
"_npmUser": {
"name": "lpinca",
"email": "luigipinca@gmail.com"
},
"_npmVersion": "4.2.0",
"_phantomChildren": {},
"_requested": {
"raw": "ws",
"scope": null,
"escapedName": "ws",
"name": "ws",
"rawSpec": "",
"spec": "latest",
"type": "tag"
},
"_requiredBy": [
"#USER",
"/"
],
"_resolved": "http://registry.npmjs.org/ws/-/ws-2.2.3.tgz",
"_shasum": "f36c9719a56dff813f455af912a2078145bbd940",
"_shrinkwrap": null,
"_spec": "ws",
"_where": "/home/vincent/Projects/SublimeTextProjects/shadowsocks-over-websocket",
"author": {
"name": "Einar Otto Stangvik",
"email": "einaros@gmail.com",
"url": "http://2x.io"
},
"bugs": {
"url": "https://github.com/websockets/ws/issues"
},
"dependencies": {
"safe-buffer": "~5.0.1",
"ultron": "~1.1.0"
},
"description": "Simple to use, blazing fast and thoroughly tested websocket client and server for Node.js",
"devDependencies": {
"benchmark": "~2.1.2",
"bufferutil": "~3.0.0",
"eslint": "~3.19.0",
"eslint-config-standard": "~8.0.0-beta.1",
"eslint-plugin-import": "~2.2.0",
"eslint-plugin-node": "~4.2.0",
"eslint-plugin-promise": "~3.5.0",
"eslint-plugin-standard": "~2.1.0",
"mocha": "~3.2.0",
"nyc": "~10.2.0",
"utf-8-validate": "~3.0.0"
},
"directories": {},
"dist": {
"shasum": "f36c9719a56dff813f455af912a2078145bbd940",
"tarball": "https://registry.npmjs.org/ws/-/ws-2.2.3.tgz"
},
"gitHead": "212c7aab04a5f23d89111c1722371211efa2dd89",
"homepage": "https://github.com/websockets/ws#readme",
"keywords": [
"HyBi",
"Push",
"RFC-6455",
"WebSocket",
"WebSockets",
"real-time"
],
"license": "MIT",
"main": "index.js",
"maintainers": [
{
"name": "3rdeden",
"email": "npm@3rd-Eden.com"
},
{
"name": "einaros",
"email": "einaros@gmail.com"
},
{
"name": "lpinca",
"email": "luigipinca@gmail.com"
},
{
"name": "v1",
"email": "npm@3rd-Eden.com"
}
],
"name": "ws",
"optionalDependencies": {},
"readme": "ERROR: No README data found!",
"repository": {
"type": "git",
"url": "git://github.com/websockets/ws.git"
},
"scripts": {
"integration": "eslint . && mocha test/*.integration.js",
"lint": "eslint .",
"test": "eslint . && nyc --reporter=html --reporter=text mocha test/*.test.js"
},
"version": "2.2.3"
}