diff --git a/server_http.hpp b/server_http.hpp
index e753a29..2f09ec1 100644
--- a/server_http.hpp
+++ b/server_http.hpp
@@ -37,6 +37,10 @@ namespace SimpleWeb {
         public:
             std::ostream stream;
             
+            size_t size() {
+                return streambuf.size();
+            }
+            
             template <class T>
             Response& operator<<(const T& t) {
                 stream << t;