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}
this.close(code, reason);
this.emit("close", code, reason);
break;
default:
this.close(1002, "unknown opcode");
}
}
// Format and send a WebSocket message
WebSocketConnection.prototype._doSend = function(opcode, payload) {
this.socket.write(encodeMessage(opcode, payload));
}
var KEY_SUFFIX = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
var hashWebSocketKey = function(key) {
var sha1 = crypto.createHash("sha1");
sha1.update(key+KEY_SUFFIX, "ascii");
return sha1.digest("base64");
}
var unmask = function(maskBytes, data) {
var payload = new Buffer(data.length);
for (var i=0; i<data.length; i++) {
payload[i] = maskBytes[i%4] ^ data[i];
}
return payload;
}
var encodeMessage = function(opcode, payload) {
var buf;
// first byte: fin and opcode
var b1 = 0x80 | opcode;
// always send message as one frame (fin)
// Second byte: mask and length part 1
// Followed by 0, 2, or 8 additional bytes of continued length
var b2 = 0; // server does not mask frames
var length = payload.length;
if (length<126) {
buf = new Buffer(payload.length + 2 + 0);
// zero extra bytes
b2 |= length;
buf.writeUInt8(b1, 0);
buf.writeUInt8(b2, 1);
payload.copy(buf, 2);
} else if (length<(1<<16)) {
buf = new Buffer(payload.length + 2 + 2);
