From 61c7afa63551aa734b679b48c7d8f9c9320a44cb Mon Sep 17 00:00:00 2001
From: coderaiser <mnemonic.enemy@gmail.com>
Date: Mon, 22 Jun 2015 15:32:58 -0400
Subject: [PATCH] feature(cloudcmd) prefix could be function

---
 HELP.md         |  2 +-
 lib/cloudcmd.js | 22 ++++++++++++++++++----
 2 files changed, 19 insertions(+), 5 deletions(-)

diff --git a/HELP.md b/HELP.md
index 1b11d112..ee2aaf24 100644
--- a/HELP.md
+++ b/HELP.md
@@ -274,7 +274,7 @@ server = http.createServer(app);
 socket = io.listen(server);
 
 app.use(cloudcmd({
-    prefix: '/prefix',  /* base URL (optional)                                      */
+    prefix: '/prefix',  /* base URL or function which returns base URL (optional)   */
     socket: socket,     /* used by Config, Edit (optional) and Console (required)   */
     config: {}          /* config data (optional)                                   */
 }));
diff --git a/lib/cloudcmd.js b/lib/cloudcmd.js
index b8c6e145..ad4f6fd0 100644
--- a/lib/cloudcmd.js
+++ b/lib/cloudcmd.js
@@ -34,12 +34,23 @@
         
         emptyFunc.middle    = function() {
             return emptyFunc;
-        },
+        };
+    
+    function getPrefix(prefix) {
+        var result;
         
+        if (typeof prefix === 'function')
+            result = prefix();
+        else
+            result = prefix;
+        
+        return result;
+    }
+    
     module.exports = function(params) {
         var p               = params || {},
             options         = p.config || {},
-            prefix          = p.prefix || '',
+            prefix          = p.prefix,
             keys            = Object.keys(options);
         
         keys.forEach(function(name) {
@@ -168,9 +179,12 @@
             next();
     }
     
-    function setUrl(prefix) {
+    function setUrl(pref) {
         return function(req, res, next) {
-            var is      = !req.url.indexOf(prefix);
+            var is, prefix;
+            
+            prefix  = getPrefix(pref);
+            is      = !req.url.indexOf(prefix);
             
             if (is) {
                 req.url = req.url.replace(prefix, '') || '/';