Major refactoring of the urls (#5)

src/utils.js

@@ -1,7 +1,6 @@
 'use strict';
 
-module.exports.getTileUrls = function(
-    protocol, domains, host, path, tilePath, format, key) {
+module.exports.getTileUrls = function(req, domains, path, format) {
 
   if (domains) {
     if (domains.constructor === String && domains.length > 0) {
@@ -9,19 +8,16 @@ module.exports.getTileUrls = function(
     }
   }
   if (!domains || domains.length == 0) {
-    domains = [host];
+    domains = [req.headers.host];
   }
 
+  var key = req.query.key;
   var query = (key && key.length > 0) ? ('?key=' + key) : '';
-  if (path == '/') {
-    path = '';
-  }
 
   var uris = [];
   domains.forEach(function(domain) {
-    uris.push(protocol + '://' + domain + path +
-              tilePath.replace('{format}', format).replace(/\/+/g, '/') +
-              query);
+    uris.push(req.protocol + '://' + domain + '/' + path +
+              '/{z}/{x}/{y}.' + format + query);
   });
 
   return uris;