1 files changed, 103 insertions, 0 deletions
diff --git a/frontend-old/node_modules/websocket-extensions/lib/parser.js b/frontend-old/node_modules/websocket-extensions/lib/parser.js
new file mode 100644
index 0000000..533767e
--- /dev/null
+++ b/frontend-old/node_modules/websocket-extensions/lib/parser.js
@@ -0,0 +1,103 @@
+'use strict';
+
+var TOKEN    = /([!#\$%&'\*\+\-\.\^_`\|~0-9A-Za-z]+)/,
+    NOTOKEN  = /([^!#\$%&'\*\+\-\.\^_`\|~0-9A-Za-z])/g,
+    QUOTED   = /"((?:\\[\x00-\x7f]|[^\x00-\x08\x0a-\x1f\x7f"\\])*)"/,
+    PARAM    = new RegExp(TOKEN.source + '(?:=(?:' + TOKEN.source + '|' + QUOTED.source + '))?'),
+    EXT      = new RegExp(TOKEN.source + '(?: *; *' + PARAM.source + ')*', 'g'),
+    EXT_LIST = new RegExp('^' + EXT.source + '(?: *, *' + EXT.source + ')*$'),
+    NUMBER   = /^-?(0|[1-9][0-9]*)(\.[0-9]+)?$/;
+
+var hasOwnProperty = Object.prototype.hasOwnProperty;
+
+var Parser = {
+  parseHeader: function(header) {
+    var offers = new Offers();
+    if (header === '' || header === undefined) return offers;
+
+    if (!EXT_LIST.test(header))
+      throw new SyntaxError('Invalid Sec-WebSocket-Extensions header: ' + header);
+
+    var values = header.match(EXT);
+
+    values.forEach(function(value) {
+      var params = value.match(new RegExp(PARAM.source, 'g')),
+          name   = params.shift(),
+          offer  = {};
+
+      params.forEach(function(param) {
+        var args = param.match(PARAM), key = args[1], data;
+
+        if (args[2] !== undefined) {
+          data = args[2];
+        } else if (args[3] !== undefined) {
+          data = args[3].replace(/\\/g, '');
+        } else {
+          data = true;
+        }
+        if (NUMBER.test(data)) data = parseFloat(data);
+
+        if (hasOwnProperty.call(offer, key)) {
+          offer[key] = [].concat(offer[key]);
+          offer[key].push(data);
+        } else {
+          offer[key] = data;
+        }
+      }, this);
+      offers.push(name, offer);
+    }, this);
+
+    return offers;
+  },
+
+  serializeParams: function(name, params) {
+    var values = [];
+
+    var print = function(key, value) {
+      if (value instanceof Array) {
+        value.forEach(function(v) { print(key, v) });
+      } else if (value === true) {
+        values.push(key);
+      } else if (typeof value === 'number') {
+        values.push(key + '=' + value);
+      } else if (NOTOKEN.test(value)) {
+        values.push(key + '="' + value.replace(/"/g, '\\"') + '"');
+      } else {
+        values.push(key + '=' + value);
+      }
+    };
+
+    for (var key in params) print(key, params[key]);
+
+    return [name].concat(values).join('; ');
+  }
+};
+
+var Offers = function() {
+  this._byName  = {};
+  this._inOrder = [];
+};
+
+Offers.prototype.push = function(name, params) {
+  if (!hasOwnProperty.call(this._byName, name))
+    this._byName[name] = [];
+
+  this._byName[name].push(params);
+  this._inOrder.push({ name: name, params: params });
+};
+
+Offers.prototype.eachOffer = function(callback, context) {
+  var list = this._inOrder;
+  for (var i = 0, n = list.length; i < n; i++)
+    callback.call(context, list[i].name, list[i].params);
+};
+
+Offers.prototype.byName = function(name) {
+  return this._byName[name] || [];
+};
+
+Offers.prototype.toArray = function() {
+  return this._inOrder.slice();
+};
+
+module.exports = Parser;