Http keep-alive conncetion - response delimiter

Hi i am writing a custom http server. At first i had only one request at one connection possible(Connection: close), everything was ok. But once i remade it connecton: keep-alive logic(more requests at one connection), my images stopped displaying. I think, it may be a problem 开发者_开发技巧with http response delimiters. Are there any? Or how can browser detect, that current http response is complete? thx

The size of the response is guided by the Content-Length header or by using Chunked Transfer Encoding.