A class supporting chat-style (command/response) protocols.
 
This class adds support for 'chat' style protocols - where one side
sends a 'command', and the other sends a response (examples would be
the common internet protocols - smtp, nntp, ftp, etc..).
 
The handle_read() method looks at the input stream for the current
'terminator' (usually '\r\n' for single-line responses, '\r\n.\r\n'
for multi-line output), calling found_terminator() on its
receipt.
 
for example:
Say you build an async nntp client using this class.  At the start
of the connection, you'll have self.terminator set to '\r\n', in
order to process the single-line greeting.  Just before issuing a
'LIST' command you'll set it to '\r\n.\r\n'.  The output of the LIST
command will be accumulated (using your own 'collect_incoming_data'
method) up to the terminator, and then control will be returned to
you - by calling your found_terminator() method.

Modules
		asyncore socket

Classes
		fifo simple_producer asyncore.dispatcher async_chat   class async_chat(asyncore.dispatcher)     This is an abstract class.  You must derive from this class, and add the two methods collect_incoming_data() and found_terminator()     Methods defined here: __init__(self, conn=None) close_when_done(self) automatically close this channel once the outgoing queue is empty collect_incoming_data(self, data) discard_buffers(self) found_terminator(self) get_terminator(self) handle_close(self) handle_read(self) handle_write(self) initiate_send(self) push(self, data) push_with_producer(self, producer) readable(self) predicate for inclusion in the readable for select() refill_buffer(self) # refill the outgoing buffer by calling the more() method # of the first producer in the queue set_terminator(self, term) Set the input delimiter.  Can be a fixed string of any length, an integer, or None writable(self) predicate for inclusion in the writable for select() Data and other attributes defined here: ac_in_buffer_size = 4096 ac_out_buffer_size = 4096 Methods inherited from asyncore.dispatcher: __getattr__(self, attr) # cheap inheritance, used to pass all other attribute # references to the underlying socket object. __repr__(self) accept(self) add_channel(self, map=None) bind(self, addr) close(self) connect(self, address) create_socket(self, family, type) del_channel(self, map=None) handle_accept(self) handle_connect(self) handle_error(self) handle_expt(self) handle_expt_event(self) handle_read_event(self) handle_write_event(self) listen(self, num) log(self, message) log_info(self, message, type='info') recv(self, buffer_size) send(self, data) set_reuse_addr(self) set_socket(self, sock, map=None) Data and other attributes inherited from asyncore.dispatcher: accepting = False addr = None closing = False connected = False debug = False   class fifo       Methods defined here: __init__(self, list=None) __len__(self) first(self) is_empty(self) pop(self) push(self, data)   class simple_producer       Methods defined here: __init__(self, data, buffer_size=512) more(self)

Functions
		find_prefix_at_end(haystack, needle)