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mqtt stuff added

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This commit is contained in:
Wolfgang Hottgenroth
2018-05-16 10:44:10 +02:00
parent 74584cdbbe
commit c7eb46b346
499 changed files with 55775 additions and 19 deletions
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node_modules/ws/lib/.DS_Store generated vendored Normal file
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node_modules/ws/lib/BufferUtil.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 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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node_modules/ws/lib/Constants.js generated vendored Normal file
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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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node_modules/ws/lib/ErrorCodes.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';
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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node_modules/ws/lib/EventTarget.js generated vendored Normal file
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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 {WebSocket} target A reference to the target to which the event was dispatched
*/
constructor (data, target) {
super('message', target);
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 = target._closeFrameReceived && target._closeFrameSent;
this.reason = reason;
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) {
listener.call(this, new MessageEvent(data, 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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node_modules/ws/lib/Extensions.js generated vendored Normal file
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'use strict';
//
// Allowed token characters:
//
// '!', '#', '$', '%', '&', ''', '*', '+', '-',
// '.', 0-9, A-Z, '^', '_', '`', a-z, '|', '~'
//
// tokenChars[32] === 0 // ' '
// tokenChars[33] === 1 // '!'
// tokenChars[34] === 0 // '"'
// ...
//
const tokenChars = [
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 0 - 15
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 16 - 31
0, 1, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 0, 1, 1, 0, // 32 - 47
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, // 48 - 63
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 64 - 79
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 1, // 80 - 95
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 96 - 111
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0 // 112 - 127
];
/**
* Adds an offer to the map of extension offers or a parameter to the map of
* parameters.
*
* @param {Object} dest The map of extension offers or parameters
* @param {String} name The extension or parameter name
* @param {(Object|Boolean|String)} elem The extension parameters or the
* parameter value
* @private
*/
function push (dest, name, elem) {
if (Object.prototype.hasOwnProperty.call(dest, name)) dest[name].push(elem);
else dest[name] = [elem];
}
/**
* Parses the `Sec-WebSocket-Extensions` header into an object.
*
* @param {String} header The field value of the header
* @return {Object} The parsed object
* @public
*/
function parse (header) {
const offers = {};
if (header === undefined || header === '') return offers;
var params = {};
var mustUnescape = false;
var isEscaping = false;
var inQuotes = false;
var extensionName;
var paramName;
var start = -1;
var end = -1;
for (var i = 0; i < header.length; i++) {
const code = header.charCodeAt(i);
if (extensionName === undefined) {
if (end === -1 && tokenChars[code] === 1) {
if (start === -1) start = i;
} else if (code === 0x20/* ' ' */|| code === 0x09/* '\t' */) {
if (end === -1 && start !== -1) end = i;
} else if (code === 0x3b/* ';' */ || code === 0x2c/* ',' */) {
if (start === -1) throw new Error(`unexpected character at index ${i}`);
if (end === -1) end = i;
const name = header.slice(start, end);
if (code === 0x2c) {
push(offers, name, params);
params = {};
} else {
extensionName = name;
}
start = end = -1;
} else {
throw new Error(`unexpected character at index ${i}`);
}
} else if (paramName === undefined) {
if (end === -1 && tokenChars[code] === 1) {
if (start === -1) start = i;
} else if (code === 0x20 || code === 0x09) {
if (end === -1 && start !== -1) end = i;
} else if (code === 0x3b || code === 0x2c) {
if (start === -1) throw new Error(`unexpected character at index ${i}`);
if (end === -1) end = i;
push(params, header.slice(start, end), true);
if (code === 0x2c) {
push(offers, extensionName, params);
params = {};
extensionName = undefined;
}
start = end = -1;
} else if (code === 0x3d/* '=' */&& start !== -1 && end === -1) {
paramName = header.slice(start, i);
start = end = -1;
} else {
throw new Error(`unexpected character at index ${i}`);
}
} else {
//
// The value of a quoted-string after unescaping must conform to the
// token ABNF, so only token characters are valid.
// Ref: https://tools.ietf.org/html/rfc6455#section-9.1
//
if (isEscaping) {
if (tokenChars[code] !== 1) {
throw new Error(`unexpected character at index ${i}`);
}
if (start === -1) start = i;
else if (!mustUnescape) mustUnescape = true;
isEscaping = false;
} else if (inQuotes) {
if (tokenChars[code] === 1) {
if (start === -1) start = i;
} else if (code === 0x22/* '"' */ && start !== -1) {
inQuotes = false;
end = i;
} else if (code === 0x5c/* '\' */) {
isEscaping = true;
} else {
throw new Error(`unexpected character at index ${i}`);
}
} else if (code === 0x22 && header.charCodeAt(i - 1) === 0x3d) {
inQuotes = true;
} else if (end === -1 && tokenChars[code] === 1) {
if (start === -1) start = i;
} else if (start !== -1 && (code === 0x20 || code === 0x09)) {
if (end === -1) end = i;
} else if (code === 0x3b || code === 0x2c) {
if (start === -1) throw new Error(`unexpected character at index ${i}`);
if (end === -1) end = i;
var value = header.slice(start, end);
if (mustUnescape) {
value = value.replace(/\\/g, '');
mustUnescape = false;
}
push(params, paramName, value);
if (code === 0x2c) {
push(offers, extensionName, params);
params = {};
extensionName = undefined;
}
paramName = undefined;
start = end = -1;
} else {
throw new Error(`unexpected character at index ${i}`);
}
}
}
if (start === -1 || inQuotes) throw new Error('unexpected end of input');
if (end === -1) end = i;
const token = header.slice(start, end);
if (extensionName === undefined) {
push(offers, token, {});
} else {
if (paramName === undefined) {
push(params, token, true);
} else if (mustUnescape) {
push(params, paramName, token.replace(/\\/g, ''));
} else {
push(params, paramName, token);
}
push(offers, extensionName, params);
}
return offers;
}
/**
* Serializes a parsed `Sec-WebSocket-Extensions` header to a string.
*
* @param {Object} value The object to format
* @return {String} A string representing the given value
* @public
*/
function format (value) {
return Object.keys(value).map((token) => {
var paramsList = value[token];
if (!Array.isArray(paramsList)) paramsList = [paramsList];
return paramsList.map((params) => {
return [token].concat(Object.keys(params).map((k) => {
var p = params[k];
if (!Array.isArray(p)) p = [p];
return p.map((v) => v === true ? k : `${k}=${v}`).join('; ');
})).join('; ');
}).join(', ');
}).join(', ');
}
module.exports = { format, parse };

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node_modules/ws/lib/PerMessageDeflate.js generated vendored Normal file
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'use strict';
const safeBuffer = require('safe-buffer');
const Limiter = require('async-limiter');
const zlib = require('zlib');
const bufferUtil = require('./BufferUtil');
const Buffer = safeBuffer.Buffer;
const TRAILER = Buffer.from([0x00, 0x00, 0xff, 0xff]);
const EMPTY_BLOCK = Buffer.from([0x00]);
const kWriteInProgress = Symbol('write-in-progress');
const kPendingClose = Symbol('pending-close');
const kTotalLength = Symbol('total-length');
const kCallback = Symbol('callback');
const kBuffers = Symbol('buffers');
const kError = Symbol('error');
const kOwner = Symbol('owner');
//
// We limit zlib concurrency, which prevents severe memory fragmentation
// as documented in https://github.com/nodejs/node/issues/8871#issuecomment-250915913
// and https://github.com/websockets/ws/issues/1202
//
// Intentionally global; it's the global thread pool that's an issue.
//
let zlibLimiter;
/**
* permessage-deflate implementation.
*/
class PerMessageDeflate {
/**
* Creates a PerMessageDeflate instance.
*
* @param {Object} options Configuration options
* @param {Boolean} options.serverNoContextTakeover Request/accept disabling
* of server context takeover
* @param {Boolean} options.clientNoContextTakeover Advertise/acknowledge
* disabling of client context takeover
* @param {(Boolean|Number)} options.serverMaxWindowBits Request/confirm the
* use of a custom server window size
* @param {(Boolean|Number)} options.clientMaxWindowBits Advertise support
* for, or request, a custom client window size
* @param {Number} options.level The value of zlib's `level` param
* @param {Number} options.memLevel The value of zlib's `memLevel` param
* @param {Number} options.threshold Size (in bytes) below which messages
* should not be compressed
* @param {Number} options.concurrencyLimit The number of concurrent calls to
* zlib
* @param {Boolean} isServer Create the instance in either server or client
* mode
* @param {Number} maxPayload The maximum allowed message length
*/
constructor (options, isServer, maxPayload) {
this._maxPayload = maxPayload | 0;
this._options = options || {};
this._threshold = this._options.threshold !== undefined
? this._options.threshold
: 1024;
this._isServer = !!isServer;
this._deflate = null;
this._inflate = null;
this.params = null;
if (!zlibLimiter) {
const concurrency = this._options.concurrencyLimit !== undefined
? this._options.concurrencyLimit
: 10;
zlibLimiter = new Limiter({ concurrency });
}
}
/**
* @type {String}
*/
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[kWriteInProgress]) {
this._inflate[kPendingClose] = true;
} else {
this._inflate.close();
this._inflate = null;
}
}
if (this._deflate) {
if (this._deflate[kWriteInProgress]) {
this._deflate[kPendingClose] = 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 ||
(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 === false &&
params.client_no_context_takeover
) {
throw new Error('Invalid value for "client_no_context_takeover"');
}
if (
(typeof this._options.clientMaxWindowBits === 'number' &&
(!params.client_max_window_bits ||
params.client_max_window_bits > this._options.clientMaxWindowBits)) ||
(this._options.clientMaxWindowBits === false &&
params.client_max_window_bits)
) {
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 (
Number.isNaN(value) ||
value < zlib.Z_MIN_WINDOWBITS ||
value > zlib.Z_MAX_WINDOWBITS
) {
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. Concurrency limited by async-limiter.
*
* @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) {
zlibLimiter.push((done) => {
this._decompress(data, fin, (err, result) => {
done();
callback(err, result);
});
});
}
/**
* Compress data. Concurrency limited by async-limiter.
*
* @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) {
zlibLimiter.push((done) => {
this._compress(data, fin, (err, result) => {
done();
callback(err, result);
});
});
}
/**
* Decompress data.
*
* @param {Buffer} data Compressed data
* @param {Boolean} fin Specifies whether or not this is the last fragment
* @param {Function} callback Callback
* @private
*/
_decompress (data, fin, callback) {
const endpoint = this._isServer ? 'client' : 'server';
if (!this._inflate) {
const key = `${endpoint}_max_window_bits`;
const windowBits = typeof this.params[key] !== 'number'
? zlib.Z_DEFAULT_WINDOWBITS
: this.params[key];
this._inflate = zlib.createInflateRaw({ windowBits });
this._inflate[kTotalLength] = 0;
this._inflate[kBuffers] = [];
this._inflate[kOwner] = this;
this._inflate.on('error', inflateOnError);
this._inflate.on('data', inflateOnData);
}
this._inflate[kCallback] = callback;
this._inflate[kWriteInProgress] = true;
this._inflate.write(data);
if (fin) this._inflate.write(TRAILER);
this._inflate.flush(() => {
const err = this._inflate[kError];
if (err) {
this._inflate.close();
this._inflate = null;
callback(err);
return;
}
const data = bufferUtil.concat(
this._inflate[kBuffers],
this._inflate[kTotalLength]
);
if (
(fin && this.params[`${endpoint}_no_context_takeover`]) ||
this._inflate[kPendingClose]
) {
this._inflate.close();
this._inflate = null;
} else {
this._inflate[kWriteInProgress] = false;
this._inflate[kTotalLength] = 0;
this._inflate[kBuffers] = [];
}
callback(null, data);
});
}
/**
* Compress data.
*
* @param {Buffer} data Data to compress
* @param {Boolean} fin Specifies whether or not this is the last fragment
* @param {Function} callback Callback
* @private
*/
_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 key = `${endpoint}_max_window_bits`;
const windowBits = typeof this.params[key] !== 'number'
? zlib.Z_DEFAULT_WINDOWBITS
: this.params[key];
this._deflate = zlib.createDeflateRaw({
memLevel: this._options.memLevel,
level: this._options.level,
flush: zlib.Z_SYNC_FLUSH,
windowBits
});
this._deflate[kTotalLength] = 0;
this._deflate[kBuffers] = [];
//
// `zlib.DeflateRaw` emits an `'error'` event only when an attempt to use
// it is made after it has already been closed. This cannot happen here,
// so we only add a listener for the `'data'` event.
//
this._deflate.on('data', deflateOnData);
}
this._deflate[kWriteInProgress] = true;
this._deflate.write(data);
this._deflate.flush(zlib.Z_SYNC_FLUSH, () => {
var data = bufferUtil.concat(
this._deflate[kBuffers],
this._deflate[kTotalLength]
);
if (fin) data = data.slice(0, data.length - 4);
if (
(fin && this.params[`${endpoint}_no_context_takeover`]) ||
this._deflate[kPendingClose]
) {
this._deflate.close();
this._deflate = null;
} else {
this._deflate[kWriteInProgress] = false;
this._deflate[kTotalLength] = 0;
this._deflate[kBuffers] = [];
}
callback(null, data);
});
}
}
module.exports = PerMessageDeflate;
/**
* The listener of the `zlib.DeflateRaw` stream `'data'` event.
*
* @param {Buffer} chunk A chunk of data
* @private
*/
function deflateOnData (chunk) {
this[kBuffers].push(chunk);
this[kTotalLength] += chunk.length;
}
/**
* The listener of the `zlib.InflateRaw` stream `'data'` event.
*
* @param {Buffer} chunk A chunk of data
* @private
*/
function inflateOnData (chunk) {
this[kTotalLength] += chunk.length;
if (
this[kOwner]._maxPayload < 1 ||
this[kTotalLength] <= this[kOwner]._maxPayload
) {
this[kBuffers].push(chunk);
return;
}
this[kError] = new Error('max payload size exceeded');
this[kError].closeCode = 1009;
this.removeListener('data', inflateOnData);
this.reset();
}
/**
* The listener of the `zlib.InflateRaw` stream `'error'` event.
*
* @param {Error} err The emitted error
* @private
*/
function inflateOnError (err) {
//
// There is no need to call `Zlib#close()` as the handle is automatically
// closed when an error is emitted.
//
this[kOwner]._inflate = null;
this[kCallback](err);
}

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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 perMessageDeflate = this._extensions[PerMessageDeflate.extensionName];
perMessageDeflate.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);
} else {
const buf = toBuffer(fragments, messageLength);
if (!isValidUTF8(buf)) {
this.error(new Error('invalid utf8 sequence'), 1007);
return;
}
this.onmessage(buf.toString());
}
}
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, '');
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());
this._loop = false;
this.cleanup(this._cleanupCallback);
}
return;
}
if (this._opcode === 0x09) this.onping(data);
else this.onpong(data);
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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/*!
* 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 constants = require('./Constants');
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._extensions = extensions || {};
this._socket = socket;
this._firstFragment = true;
this._compress = false;
this._bufferedBytes = 0;
this._deflating = false;
this._queue = [];
}
/**
* 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) {
var buf;
if (code === undefined) {
code = 1000;
} else if (typeof code !== 'number' || !ErrorCodes.isValidErrorCode(code)) {
throw new Error('first argument must be a valid error code number');
}
if (data === undefined || data === '') {
if (code === 1000) {
buf = constants.EMPTY_BUFFER;
} else {
buf = Buffer.allocUnsafe(2);
buf.writeUInt16BE(code, 0, true);
}
} else {
buf = Buffer.allocUnsafe(2 + Buffer.byteLength(data));
buf.writeUInt16BE(code, 0, true);
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, {
fin: true,
rsv1: false,
opcode: 0x08,
mask,
readOnly: false
}), 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, {
fin: true,
rsv1: false,
opcode: 0x09,
mask,
readOnly
}));
}
/**
* 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, {
fin: true,
rsv1: false,
opcode: 0x0a,
mask,
readOnly
}));
}
/**
* 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;
}
}
const perMessageDeflate = this._extensions[PerMessageDeflate.extensionName];
if (this._firstFragment) {
this._firstFragment = false;
if (rsv1 && perMessageDeflate) {
rsv1 = data.length >= perMessageDeflate._threshold;
}
this._compress = rsv1;
} else {
rsv1 = false;
opcode = 0;
}
if (options.fin) this._firstFragment = true;
if (perMessageDeflate) {
const opts = {
fin: options.fin,
rsv1,
opcode,
mask: options.mask,
readOnly
};
if (this._deflating) {
this.enqueue([this.dispatch, data, this._compress, opts, cb]);
} else {
this.dispatch(data, this._compress, opts, cb);
}
} else {
this.sendFrame(Sender.frame(data, {
fin: options.fin,
rsv1: false,
opcode,
mask: options.mask,
readOnly
}), cb);
}
}
/**
* Dispatches a data message.
*
* @param {Buffer} data The message to send
* @param {Boolean} compress Specifies whether or not to compress `data`
* @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
* @param {Function} cb Callback
* @private
*/
dispatch (data, compress, options, cb) {
if (!compress) {
this.sendFrame(Sender.frame(data, options), cb);
return;
}
const perMessageDeflate = this._extensions[PerMessageDeflate.extensionName];
this._deflating = true;
perMessageDeflate.compress(data, options.fin, (_, buf) => {
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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/*!
* 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._closeFrameReceived = false;
this._closeFrameSent = false;
this._closeMessage = '';
this._closeTimer = null;
this._finalized = false;
this._closeCode = 1006;
this._receiver = null;
this._sender = null;
this._socket = null;
this._ultron = null;
if (Array.isArray(address)) {
initAsServerClient.call(this, address[0], address[1], 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;
this._ultron.on('close', this._finalize);
this._ultron.on('error', this._finalize);
this._ultron.on('end', this._finalize);
if (head.length > 0) socket.unshift(head);
this._ultron.on('data', (data) => {
this.bytesReceived += data.length;
this._receiver.add(data);
});
this._receiver.onmessage = (data) => this.emit('message', data);
this._receiver.onping = (data) => {
this.pong(data, !this._isServer, true);
this.emit('ping', data);
};
this._receiver.onpong = (data) => this.emit('pong', data);
this._receiver.onclose = (code, reason) => {
this._closeFrameReceived = true;
this._closeMessage = reason;
this._closeCode = code;
if (!this._finalized) this.close(code, reason);
};
this._receiver.onerror = (error, code) => {
this._closeMessage = '';
this._closeCode = code;
//
// Ensure that the error is emitted even if `WebSocket#finalize()` has
// already been called.
//
this.readyState = WebSocket.CLOSING;
this.emit('error', error);
this.finalize(true);
};
this.readyState = WebSocket.OPEN;
this.emit('open');
}
/**
* Clean up and release internal resources.
*
* @param {(Boolean|Error)} error Indicates whether or not an error occurred
* @private
*/
finalize (error) {
if (this._finalized) return;
this.readyState = WebSocket.CLOSING;
this._finalized = true;
if (typeof error === 'object') this.emit('error', error);
if (!this._socket) return this.emitClose();
clearTimeout(this._closeTimer);
this._closeTimer = null;
this._ultron.destroy();
this._ultron = null;
this._socket.on('error', constants.NOOP);
if (!error) this._socket.end();
else this._socket.destroy();
this._socket = null;
this._sender = null;
this._receiver.cleanup(() => this.emitClose());
this._receiver = null;
}
/**
* Emit the `close` event.
*
* @private
*/
emitClose () {
this.readyState = WebSocket.CLOSED;
this.emit('close', this._closeCode, this._closeMessage);
if (this.extensions[PerMessageDeflate.extensionName]) {
this.extensions[PerMessageDeflate.extensionName].cleanup();
}
this.extensions = null;
this.removeAllListeners();
}
/**
* 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.
*
* +----------+ +-----------+ +----------+
* + - - -|ws.close()|---->|close frame|-->|ws.close()|- - - -
* +----------+ +-----------+ +----------+ |
* | +----------+ +-----------+ |
* |ws.close()|<----|close frame|<--------+ |
* +----------+ +-----------+ |
* CLOSING | +---+ | CLOSING
* | +---|fin|<------------+
* | | | +---+ |
* | | +---+ +-------------+
* | +----------+-->|fin|----->|ws.finalize()| - - +
* | +---+ +-------------+
* | +-------------+ |
* - - -|ws.finalize()|<--+
* +-------------+
*
* @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) {
this._req.abort();
this.finalize(new Error('closed before the connection is established'));
return;
}
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._finalized) {
if (this._closeFrameReceived) this._socket.end();
//
// Ensure that the connection is cleaned up even when the closing
// handshake fails.
//
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) {
this._req.abort();
this.finalize(new Error('closed before the connection is established'));
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 (socket, head, options) {
this.protocolVersion = options.protocolVersion;
this._maxPayload = options.maxPayload;
this.extensions = options.extensions;
this.protocol = options.protocol;
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 {Number} options.handshakeTimeout Timeout in milliseconds for the handshake request
* @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} options.ecdhCurve The curves for ECDH key agreement 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,
handshakeTimeout: null,
localAddress: null,
headers: null,
family: null,
origin: null,
agent: null,
host: null,
//
// SSL options.
//
checkServerIdentity: null,
rejectUnauthorized: null,
passphrase: null,
ciphers: null,
ecdhCurve: 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: ${protocolVersions.join(', ')})`
);
}
this.protocolVersion = options.protocolVersion;
this._isServer = false;
this.url = address;
const serverUrl = url.parse(address);
const isUnixSocket = serverUrl.protocol === 'ws+unix:';
if (!serverUrl.host && (!isUnixSocket || !serverUrl.path)) {
throw new Error('invalid url');
}
const isSecure = serverUrl.protocol === 'wss:' || serverUrl.protocol === 'https:';
const key = crypto.randomBytes(16).toString('base64');
const httpObj = isSecure ? https : http;
var perMessageDeflate;
const requestOptions = {
port: serverUrl.port || (isSecure ? 443 : 80),
host: serverUrl.hostname,
path: '/',
headers: {
'Sec-WebSocket-Version': options.protocolVersion,
'Sec-WebSocket-Key': key,
'Connection': 'Upgrade',
'Upgrade': 'websocket'
}
};
if (options.headers) Object.assign(requestOptions.headers, options.headers);
if (options.perMessageDeflate) {
perMessageDeflate = new PerMessageDeflate(
options.perMessageDeflate !== true ? options.perMessageDeflate : {},
false
);
requestOptions.headers['Sec-WebSocket-Extensions'] = Extensions.format({
[PerMessageDeflate.extensionName]: perMessageDeflate.offer()
});
}
if (options.protocol) {
requestOptions.headers['Sec-WebSocket-Protocol'] = options.protocol;
}
if (options.origin) {
if (options.protocolVersion < 13) {
requestOptions.headers['Sec-WebSocket-Origin'] = options.origin;
} else {
requestOptions.headers.Origin = options.origin;
}
}
if (options.host) requestOptions.headers.Host = options.host;
if (serverUrl.auth) requestOptions.auth = serverUrl.auth;
if (options.localAddress) requestOptions.localAddress = options.localAddress;
if (options.family) requestOptions.family = options.family;
if (isUnixSocket) {
const parts = serverUrl.path.split(':');
requestOptions.socketPath = parts[0];
requestOptions.path = parts[1];
} else if (serverUrl.path) {
//
// Make sure that path starts with `/`.
//
if (serverUrl.path.charAt(0) !== '/') {
requestOptions.path = `/${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.ecdhCurve ||
options.cert ||
options.key ||
options.pfx ||
options.ca
) {
if (options.passphrase) requestOptions.passphrase = options.passphrase;
if (options.ciphers) requestOptions.ciphers = options.ciphers;
if (options.ecdhCurve) requestOptions.ecdhCurve = options.ecdhCurve;
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);
if (options.handshakeTimeout) {
this._req.setTimeout(options.handshakeTimeout, () => {
this._req.abort();
this.finalize(new Error('opening handshake has timed out'));
});
}
this._req.on('error', (error) => {
if (this._req.aborted) return;
this._req = null;
this.finalize(error);
});
this._req.on('response', (res) => {
if (!this.emit('unexpected-response', this._req, res)) {
this._req.abort();
this.finalize(new Error(`unexpected server response (${res.statusCode})`));
}
});
this._req.on('upgrade', (res, socket, head) => {
this.emit('headers', res.headers, res);
//
// The user may have closed the connection from a listener of the `headers`
// event.
//
if (this.readyState !== WebSocket.CONNECTING) return;
this._req = null;
const digest = crypto.createHash('sha1')
.update(key + constants.GUID, 'binary')
.digest('base64');
if (res.headers['sec-websocket-accept'] !== digest) {
socket.destroy();
return this.finalize(new Error('invalid server key'));
}
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();
return this.finalize(new Error(protError));
}
if (serverProt) this.protocol = serverProt;
if (perMessageDeflate) {
try {
const serverExtensions = Extensions.parse(
res.headers['sec-websocket-extensions']
);
if (serverExtensions[PerMessageDeflate.extensionName]) {
perMessageDeflate.accept(
serverExtensions[PerMessageDeflate.extensionName]
);
this.extensions[PerMessageDeflate.extensionName] = perMessageDeflate;
}
} catch (err) {
socket.destroy();
this.finalize(new Error('invalid Sec-WebSocket-Extensions header'));
return;
}
}
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: false,
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.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', client, req);
});
});
}
if (options.perMessageDeflate === true) options.perMessageDeflate = {};
if (options.clientTracking) this.clients = new Set();
this.options = options;
}
/**
* 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'];
const extensions = {};
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);
}
if (this.options.perMessageDeflate) {
const perMessageDeflate = new PerMessageDeflate(
this.options.perMessageDeflate,
true,
this.options.maxPayload
);
try {
const offers = Extensions.parse(
req.headers['sec-websocket-extensions']
);
if (offers[PerMessageDeflate.extensionName]) {
perMessageDeflate.accept(offers[PerMessageDeflate.extensionName]);
extensions[PerMessageDeflate.extensionName] = perMessageDeflate;
}
} catch (err) {
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, req);
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,
extensions,
version,
req,
socket,
head,
cb
);
});
return;
}
if (!this.options.verifyClient(info)) return abortConnection(socket, 401);
}
this.completeUpgrade(protocol, extensions, version, req, socket, head, cb);
}
/**
* Upgrade the connection to WebSocket.
*
* @param {String} protocol The chosen subprotocol
* @param {Object} extensions The accepted extensions
* @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, extensions, 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}`);
if (extensions[PerMessageDeflate.extensionName]) {
const params = extensions[PerMessageDeflate.extensionName].params;
const value = Extensions.format({
[PerMessageDeflate.extensionName]: [params]
});
headers.push(`Sec-WebSocket-Extensions: ${value}`);
}
//
// Allow external modification/inspection of handshake headers.
//
this.emit('headers', headers, req);
socket.write(headers.concat('\r\n').join('\r\n'));
const client = new WebSocket([socket, head], null, {
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();
}
/**
* 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();
}