diff options
Diffstat (limited to 'signaling-server/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws/lib/Receiver.hixie.js')
-rw-r--r-- | signaling-server/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws/lib/Receiver.hixie.js | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/signaling-server/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws/lib/Receiver.hixie.js b/signaling-server/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws/lib/Receiver.hixie.js new file mode 100644 index 0000000..a8e41c4 --- /dev/null +++ b/signaling-server/node_modules/socket.io/node_modules/socket.io-client/node_modules/ws/lib/Receiver.hixie.js @@ -0,0 +1,180 @@ +/*! + * ws: a node.js websocket client + * Copyright(c) 2011 Einar Otto Stangvik <einaros@gmail.com> + * MIT Licensed + */ + +var util = require('util'); + +/** + * State constants + */ + +var EMPTY = 0 + , BODY = 1; +var BINARYLENGTH = 2 + , BINARYBODY = 3; + +/** + * Hixie Receiver implementation + */ + +function Receiver () { + this.state = EMPTY; + this.buffers = []; + this.messageEnd = -1; + this.spanLength = 0; + this.dead = false; + + this.onerror = function() {}; + this.ontext = function() {}; + this.onbinary = function() {}; + this.onclose = function() {}; + this.onping = function() {}; + this.onpong = function() {}; +} + +module.exports = Receiver; + +/** + * Add new data to the parser. + * + * @api public + */ + +Receiver.prototype.add = function(data) { + var self = this; + function doAdd() { + if (self.state === EMPTY) { + if (data.length == 2 && data[0] == 0xFF && data[1] == 0x00) { + self.reset(); + self.onclose(); + return; + } + if (data[0] === 0x80) { + self.messageEnd = 0; + self.state = BINARYLENGTH; + data = data.slice(1); + } else { + + if (data[0] !== 0x00) { + self.error('payload must start with 0x00 byte', true); + return; + } + data = data.slice(1); + self.state = BODY; + + } + } + if (self.state === BINARYLENGTH) { + var i = 0; + while ((i < data.length) && (data[i] & 0x80)) { + self.messageEnd = 128 * self.messageEnd + (data[i] & 0x7f); + ++i; + } + if (i < data.length) { + self.messageEnd = 128 * self.messageEnd + (data[i] & 0x7f); + self.state = BINARYBODY; + ++i; + } + if (i > 0) + data = data.slice(i); + } + if (self.state === BINARYBODY) { + var dataleft = self.messageEnd - self.spanLength; + if (data.length >= dataleft) { + // consume the whole buffer to finish the frame + self.buffers.push(data); + self.spanLength += dataleft; + self.messageEnd = dataleft; + return self.parse(); + } + // frame's not done even if we consume it all + self.buffers.push(data); + self.spanLength += data.length; + return; + } + self.buffers.push(data); + if ((self.messageEnd = bufferIndex(data, 0xFF)) != -1) { + self.spanLength += self.messageEnd; + return self.parse(); + } + else self.spanLength += data.length; + } + while(data) data = doAdd(); +}; + +/** + * Releases all resources used by the receiver. + * + * @api public + */ + +Receiver.prototype.cleanup = function() { + this.dead = true; + this.state = EMPTY; + this.buffers = []; +}; + +/** + * Process buffered data. + * + * @api public + */ + +Receiver.prototype.parse = function() { + var output = new Buffer(this.spanLength); + var outputIndex = 0; + for (var bi = 0, bl = this.buffers.length; bi < bl - 1; ++bi) { + var buffer = this.buffers[bi]; + buffer.copy(output, outputIndex); + outputIndex += buffer.length; + } + var lastBuffer = this.buffers[this.buffers.length - 1]; + if (this.messageEnd > 0) lastBuffer.copy(output, outputIndex, 0, this.messageEnd); + if (this.state !== BODY) --this.messageEnd; + var tail = null; + if (this.messageEnd < lastBuffer.length - 1) { + tail = lastBuffer.slice(this.messageEnd + 1); + } + this.reset(); + this.ontext(output.toString('utf8')); + return tail; +}; + +/** + * Handles an error + * + * @api private + */ + +Receiver.prototype.error = function (reason, terminate) { + this.reset(); + this.onerror(reason, terminate); + return this; +}; + +/** + * Reset parser state + * + * @api private + */ + +Receiver.prototype.reset = function (reason) { + if (this.dead) return; + this.state = EMPTY; + this.buffers = []; + this.messageEnd = -1; + this.spanLength = 0; +}; + +/** + * Internal api + */ + +function bufferIndex(buffer, byte) { + for (var i = 0, l = buffer.length; i < l; ++i) { + if (buffer[i] === byte) return i; + } + return -1; +} |