not it is really working

webserver.cc

@@ -293,10 +293,11 @@ int WebServerClient::SendResponseFile (WebRequestBuffer *request, std::string fn
     	filereadbytes += outbufferpos;
 	}
 	else {
-    	header = CreateHeader (request, error, filetype, filestat.st_size, addheader);
+    	header = GenErrorHtml(error, "some internal server error");
-    	header = header + GenErrorHtml(error, "some internal server error");
+    	header = CreateHeader (request, error, filetype, header.length(), addheader) + header;
     	outbuffer = (char*) malloc (header.length() + 16);
     	memcpy (outbuffer, header.c_str(), header.length());
+    	filereadbytes = header.length();
 	}
 
     if (ssl)    l = ssl->Write(outbuffer, filereadbytes);