diff options
Diffstat (limited to 'signaling-server/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws/lib/Sender.js')
| -rw-r--r-- | signaling-server/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws/lib/Sender.js | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/signaling-server/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws/lib/Sender.js b/signaling-server/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws/lib/Sender.js new file mode 100644 index 0000000..bc6ea73 --- /dev/null +++ b/signaling-server/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws/lib/Sender.js @@ -0,0 +1,227 @@ +/*! + * ws: a node.js websocket client + * Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com> + * MIT Licensed + */ + +var events = require('events') + , util = require('util') + , EventEmitter = events.EventEmitter + , ErrorCodes = require('./ErrorCodes') + , bufferUtil = require('./BufferUtil').BufferUtil; + +/** + * HyBi Sender implementation + */ + +function Sender(socket) { + this._socket = socket; + this.firstFragment = true; +} + +/** + * Inherits from EventEmitter. + */ + +util.inherits(Sender, events.EventEmitter); + +/** + * Sends a close instruction to the remote party. + * + * @api public + */ + +Sender.prototype.close = function(code, data, mask) { + if (typeof code !== 'undefined') { + if (typeof code !== 'number' || + !ErrorCodes.isValidErrorCode(code)) throw new Error('first argument must be a valid error code number'); + } + code = code || 1000; + var dataBuffer = new Buffer(2 + (data ? Buffer.byteLength(data) : 0)); + writeUInt16BE.call(dataBuffer, code, 0); + if (dataBuffer.length > 2) dataBuffer.write(data, 2); + this.frameAndSend(0x8, dataBuffer, true, mask); +}; + +/** + * Sends a ping message to the remote party. + * + * @api public + */ + +Sender.prototype.ping = function(data, options) { + var mask = options && options.mask; + this.frameAndSend(0x9, data || '', true, mask); +}; + +/** + * Sends a pong message to the remote party. + * + * @api public + */ + +Sender.prototype.pong = function(data, options) { + var mask = options && options.mask; + this.frameAndSend(0xa, data || '', true, mask); +}; + +/** + * Sends text or binary data to the remote party. + * + * @api public + */ + +Sender.prototype.send = function(data, options, cb) { + var finalFragment = options && options.fin === false ? false : true; + var mask = options && options.mask; + var opcode = options && options.binary ? 2 : 1; + if (this.firstFragment === false) opcode = 0; + else this.firstFragment = false; + if (finalFragment) this.firstFragment = true + this.frameAndSend(opcode, data, finalFragment, mask, cb); +}; + +/** + * Frames and sends a piece of data according to the HyBi WebSocket protocol. + * + * @api private + */ + +Sender.prototype.frameAndSend = function(opcode, data, finalFragment, maskData, cb) { + var canModifyData = false; + + if (!data) { + try { + this._socket.write(new Buffer([opcode | (finalFragment ? 0x80 : 0), 0 | (maskData ? 0x80 : 0)].concat(maskData ? [0, 0, 0, 0] : [])), 'binary', cb); + } + catch (e) { + if (typeof cb == 'function') cb(e); + else this.emit('error', e); + } + return; + } + + if (!Buffer.isBuffer(data)) { + canModifyData = true; + if (data && (typeof data.byteLength !== 'undefined' || typeof data.buffer !== 'undefined')) { + data = getArrayBuffer(data); + } else { + data = new Buffer(data); + } + } + + var dataLength = data.length + , dataOffset = maskData ? 6 : 2 + , secondByte = dataLength; + + if (dataLength >= 65536) { + dataOffset += 8; + secondByte = 127; + } + else if (dataLength > 125) { + dataOffset += 2; + secondByte = 126; + } + + var mergeBuffers = dataLength < 32768 || (maskData && !canModifyData); + var totalLength = mergeBuffers ? dataLength + dataOffset : dataOffset; + var outputBuffer = new Buffer(totalLength); + outputBuffer[0] = finalFragment ? opcode | 0x80 : opcode; + + switch (secondByte) { + case 126: + writeUInt16BE.call(outputBuffer, dataLength, 2); + break; + case 127: + writeUInt32BE.call(outputBuffer, 0, 2); + writeUInt32BE.call(outputBuffer, dataLength, 6); + } + + if (maskData) { + outputBuffer[1] = secondByte | 0x80; + var mask = this._randomMask || (this._randomMask = getRandomMask()); + outputBuffer[dataOffset - 4] = mask[0]; + outputBuffer[dataOffset - 3] = mask[1]; + outputBuffer[dataOffset - 2] = mask[2]; + outputBuffer[dataOffset - 1] = mask[3]; + if (mergeBuffers) { + bufferUtil.mask(data, mask, outputBuffer, dataOffset, dataLength); + try { + this._socket.write(outputBuffer, 'binary', cb); + } + catch (e) { + if (typeof cb == 'function') cb(e); + else this.emit('error', e); + } + } + else { + bufferUtil.mask(data, mask, data, 0, dataLength); + try { + this._socket.write(outputBuffer, 'binary'); + this._socket.write(data, 'binary', cb); + } + catch (e) { + if (typeof cb == 'function') cb(e); + else this.emit('error', e); + } + } + } + else { + outputBuffer[1] = secondByte; + if (mergeBuffers) { + data.copy(outputBuffer, dataOffset); + try { + this._socket.write(outputBuffer, 'binary', cb); + } + catch (e) { + if (typeof cb == 'function') cb(e); + else this.emit('error', e); + } + } + else { + try { + this._socket.write(outputBuffer, 'binary'); + this._socket.write(data, 'binary', cb); + } + catch (e) { + if (typeof cb == 'function') cb(e); + else this.emit('error', e); + } + } + } +}; + +module.exports = Sender; + +function writeUInt16BE(value, offset) { + this[offset] = (value & 0xff00)>>8; + this[offset+1] = value & 0xff; +} + +function writeUInt32BE(value, offset) { + this[offset] = (value & 0xff000000)>>24; + this[offset+1] = (value & 0xff0000)>>16; + this[offset+2] = (value & 0xff00)>>8; + this[offset+3] = value & 0xff; +} + +function getArrayBuffer(data) { + // data is either an ArrayBuffer or ArrayBufferView. + var array = new Uint8Array(data.buffer || data) + , l = data.byteLength || data.length + , o = data.byteOffset || 0 + , buffer = new Buffer(l); + for (var i = 0; i < l; ++i) { + buffer[i] = array[o+i]; + } + return buffer; +} + +function getRandomMask() { + return new Buffer([ + ~~(Math.random() * 255), + ~~(Math.random() * 255), + ~~(Math.random() * 255), + ~~(Math.random() * 255) + ]); +} |