add prefix to options to remove from path

README.md

@@ -92,8 +92,9 @@ var server = connect.createServer(
     , dest: __dirname + '/public'
     , debug: true
     , outputStyle: 'compressed'
+    , prefix:  '/prefix'
   }),
-  connect.static(__dirname + '/public')
+  connect.static('/prefix', __dirname + '/public')
 );
 ```
 

lib/middleware.js

@@ -75,6 +75,9 @@ module.exports = function(options){
   return function sass(req, res, next){
     if ('GET' != req.method && 'HEAD' != req.method) return next();
     var path = url.parse(req.url).pathname;
+    if (options.prefix && 0 === path.indexOf(options.prefix)) {
+      path = path.substring(options.prefix.length);
+    }
     if (/\.css$/.test(path)) {
       var cssPath = join(dest, path)
         , sassPath = join(src, path.replace('.css', '.scss'))