- Added a new json.html output

- Fixed a bug where post() was defined twice in request. Added server and request too

src/Extension/UrlExtension.php

@@ -162,11 +162,26 @@ class UrlExtension implements Extension {
             $search = [];
 
             foreach($matches as $item) {
-                if ( ! array_key_exists($item[1], $arguments) ) {
-                    throw new \InvalidArgumentException("Argument `{$item[1]}` is missing within required route parameter(s)");
+                if (strpos($item[1], "=") !== false) {
+                    list($variable, $default) = explode('=', $item[1]);
                 }
+                else {
+                    $variable = $item[1];
+                }
+                
+                
+                if ( array_key_exists($variable, $arguments) ) {
+                    $value = $arguments[ $item[1] ];
+                }
+                else if ( isset($default) ) {
+                    $value = $default;
+                }
+                else {
+                    throw new \InvalidArgumentException("Argument `$variable` is missing within required route parameter(s)");                    
+                }                
+                
 
-                $search[ $item[0] ] = $arguments[ $item[1] ];
+                $search[ $item[0] ] = $value;
                 unset($arguments[ $item[1] ]);
             }