error handling def send_error(self,code,message)self push_text("http/ % % \ \ (coderesponses[code])self push_text("content-typetext/plain\ \ "self push_text("\ \ "self push_text(messageclass file_producer(object)def _init_ (self,filename,buffer_size= )self open(filename,"rb"self buffer_size buffer_size def more(self)data self read(self buffer_sizeif not dataself close(return data async_http( asyncore loop(to test this exampleyou will need to supply url corresponding to file in the same directory as where you are running the server asyncore the asyncore module is used to build network applications in which network activity is handled asynchronously as series of events dispatched by an event loopbuilt using the select(system call such an approach is useful in network programs that want to provide concurrencybut without the use of threads or processes this method can also provide high performance for short transactions all the functionality of this module is provided by the dispatcher classwhich is thin wrapper around an ordinary socket object dispatcher([sock]base class defining an event-driven nonblocking socket object sock is an existing socket object if omitteda socket must be created using the create_socket(method (described shortlyonce it' creatednetwork events are handled by special handler methods in additionall open dispatcher objects are saved in an internal list that' used by number of polling functions the following methods of the dispatcher class are called to handle network events they should be defined in classes derived from dispatcher handle_accept(called on listening sockets when new connection arrives handle_close(called when the socket is closed handle_connect(called when connection is made handle_error(called when an uncaught python exception occurs lib fl ff