第一次提交 游戏界面资源数据已更新

tools/server2017-64-stable/node_modules/nodejs-websocket/frame.js

@@ -0,0 +1,152 @@
+/**
+ * @file Utility functions for creating frames
+ */
+'use strict'
+
+/**
+ * Creates a text frame
+ * @param {string} data
+ * @param {boolean} [masked=false] if the frame should be masked
+ * @returns {Buffer}
+ * @private
+ */
+exports.createTextFrame = function (data, masked) {
+	var payload, meta
+
+	payload = new Buffer(data)
+	meta = generateMetaData(true, 1, masked === undefined ? false : masked, payload)
+
+	return Buffer.concat([meta, payload], meta.length + payload.length)
+}
+
+/**
+ * Create a binary frame
+ * @param {Buffer} data
+ * @param {boolean} [masked=false] if the frame should be masked
+ * @param {boolean} [first=true] if this is the first frame in a sequence
+ * @param {boolean} [fin=true] if this is the final frame in a sequence
+ * @returns {Buffer}
+ * @private
+ */
+exports.createBinaryFrame = function (data, masked, first, fin) {
+	var payload, meta
+
+	first = first === undefined ? true : first
+	masked = masked === undefined ? false : masked
+	if (masked) {
+		payload = new Buffer(data.length)
+		data.copy(payload)
+	} else {
+		payload = data
+	}
+	meta = generateMetaData(fin === undefined ? true : fin, first ? 2 : 0, masked, payload)
+
+	return Buffer.concat([meta, payload], meta.length + payload.length)
+}
+
+/**
+ * Create a close frame
+ * @param {number} code
+ * @param {string} [reason='']
+ * @param {boolean} [masked=false] if the frame should be masked
+ * @returns {Buffer}
+ * @private
+ */
+exports.createCloseFrame = function (code, reason, masked) {
+	var payload, meta
+
+	if (code !== undefined && code !== 1005) {
+		payload = new Buffer(reason === undefined ? '--' : '--' + reason)
+		payload.writeUInt16BE(code, 0)
+	} else {
+		payload = new Buffer(0)
+	}
+	meta = generateMetaData(true, 8, masked === undefined ? false : masked, payload)
+
+	return Buffer.concat([meta, payload], meta.length + payload.length)
+}
+
+/**
+ * Create a ping frame
+ * @param {string} data
+ * @param {boolean} [masked=false] if the frame should be masked
+ * @returns {Buffer}
+ * @private
+ */
+exports.createPingFrame = function (data, masked) {
+	var payload, meta
+
+	payload = new Buffer(data)
+	meta = generateMetaData(true, 9, masked === undefined ? false : masked, payload)
+
+	return Buffer.concat([meta, payload], meta.length + payload.length)
+}
+
+/**
+ * Create a pong frame
+ * @param {string} data
+ * @param {boolean} [masked=false] if the frame should be masked
+ * @returns {Buffer}
+ * @private
+ */
+exports.createPongFrame = function (data, masked) {
+	var payload, meta
+
+	payload = new Buffer(data)
+	meta = generateMetaData(true, 10, masked === undefined ? false : masked, payload)
+
+	return Buffer.concat([meta, payload], meta.length + payload.length)
+}
+
+/**
+ * Creates the meta-data portion of the frame
+ * If the frame is masked, the payload is altered accordingly
+ * @param {boolean} fin
+ * @param {number} opcode
+ * @param {boolean} masked
+ * @param {Buffer} payload
+ * @returns {Buffer}
+ * @private
+ */
+function generateMetaData(fin, opcode, masked, payload) {
+	var len, meta, start, mask, i
+
+	len = payload.length
+
+	// Creates the buffer for meta-data
+	meta = new Buffer(2 + (len < 126 ? 0 : (len < 65536 ? 2 : 8)) + (masked ? 4 : 0))
+
+	// Sets fin and opcode
+	meta[0] = (fin ? 128 : 0) + opcode
+
+	// Sets the mask and length
+	meta[1] = masked ? 128 : 0
+	start = 2
+	if (len < 126) {
+		meta[1] += len
+	} else if (len < 65536) {
+		meta[1] += 126
+		meta.writeUInt16BE(len, 2)
+		start += 2
+	} else {
+		// Warning: JS doesn't support integers greater than 2^53
+		meta[1] += 127
+		meta.writeUInt32BE(Math.floor(len / Math.pow(2, 32)), 2)
+		meta.writeUInt32BE(len % Math.pow(2, 32), 6)
+		start += 8
+	}
+
+	// Set the mask-key
+	if (masked) {
+		mask = new Buffer(4)
+		for (i = 0; i < 4; i++) {
+			meta[start + i] = mask[i] = Math.floor(Math.random() * 256)
+		}
+		for (i = 0; i < payload.length; i++) {
+			payload[i] ^= mask[i % 4]
+		}
+		start += 4
+	}
+
+	return meta
+}