generating uid is only needed on the server

node_modules/kaefer/lib/server.js

@@ -22,6 +22,7 @@
  
 var util = require("./util");
 var EventEmitter = require("events").EventEmitter;
+var crypto = require("crypto");
 
 var ReliableSocket = require("./reliable_socket");
 var ReconnectSocket = require("./reconnect_socket");
@@ -78,7 +79,7 @@ Server.prototype.getConnection = function(id) {
         }
     }
     
-    id = util.uid(10);
+    id = generateUid(10);
     transport = this.sockets[id] = new ReliableSocket(new ReconnectSocket(), this.socketOptions);
     transport.on("disconnect", this.disconnect.bind(this, transport));
     transport.id = id;
@@ -92,4 +93,12 @@ Server.prototype.disconnect = function(transport) {
         transport.close();
         this.emit("disconnect", transport);
     }
-};
+};
+
+function generateUid(length) {
+    return (crypto
+        .randomBytes(length)
+        .toString("base64")
+        .slice(0, length)
+    );
+}

node_modules/kaefer/lib/util.js

@@ -4,32 +4,4 @@ exports.inherits = function(Child, Parent) {
   Child.prototype = Object.create(Parent.prototype, { constructor: { value: Child }});
 };
 
-var isNode = (typeof global !== "undefined" && ({}).toString.call(global) == '[object global]');
-var isBrowser = (typeof window !== "undefined" && ({}).toString.call(window) == '[object window]');
-
-if (isNode) {
-    exports.uid = function(length) {
-        // make sure packagers don't try to package "crypto"
-        return (require("cry" + "pto")
-            .randomBytes(length)
-            .toString("base64")
-            .slice(0, length)
-        );
-    };
-} else if (isBrowser && window.crypto && window.crypto.getRandomValues) {
-    exports.uid = function(length) {
-        var values = new Uint8Array(length);
-        window.crypto.getRandomValues(values);
-        return btoa(String.fromCharCode.apply(null, values)).slice(0, length);
-    };
-} else {
-    exports.uid = function(length) {
-        var arr = [];
-        for (var i = 0; i < length; i++) {
-            arr[i] = Math.floor(Math.random() * 255);
-        }
-        return btoa(String.fromCharCode.apply(null, arr)).slice(0, length);
-    };
-}
-
 });