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asynchat.cpython-310.pyc
o }5h - @ s^ d Z ddlZddlmZ ddlmZ ededd G dd d ejZG d d d Z d d Z dS )a 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 self.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 self.found_terminator() method. N)deque)warnzlThe asynchat module is deprecated and will be removed in Python 3.12. The recommended replacement is asyncio ) stacklevelc @ s e Zd ZdZdZdZdZdZd(ddZdd Z d d Z d d Z dd Z dd Z dd Zdd Zdd Zdd Zdd Zd d Zd d Zd d! Zd"d# Zd$d% Zd&d' ZdS )) async_chatzThis is an abstract class. You must derive from this class, and add the two methods collect_incoming_data() and found_terminator()i r zlatin-1Nc C s( d| _ g | _t | _tj| || d S N ) ac_in_bufferincomingr producer_fifoasyncore dispatcher__init__)selfsockmap r /usr/lib/python3.10/asynchat.pyr K s zasync_chat.__init__c C t dNz must be implemented in subclassNotImplementedErrorr datar r r collect_incoming_dataY z async_chat.collect_incoming_datac C s | j | d S N)r appendr r r r _collect_incoming_data\ s z!async_chat._collect_incoming_datac C s d | j}| jd d = |S r )joinr )r dr r r _get_data_ s zasync_chat._get_datac C r r r r r r r found_terminatord r zasync_chat.found_terminatorc C sB t |tr| jrt|| j}n t |tr |dk r td|| _dS )zdSet the input delimiter. Can be a fixed string of any length, an integer, or None. r z-the number of received bytes must be positiveN) isinstancestr use_encodingbytesencodingint ValueError terminator)r termr r r set_terminatorg s zasync_chat.set_terminatorc C s | j S r )r+ r" r r r get_terminatorr s zasync_chat.get_terminatorc C s z| | j}W n ty Y d S ty | Y d S w t|tr.| jr.tt| j }| j | | _ | j rt | j }| }|sL| | j d| _ nt|tr|}||k rg| | j d| _ | j| | _np| | j d | | j |d | _ d| _| nVt |}| j |}|dkr|dkr| | j d | | j || d | _ | n+t| j |}|r||kr| | j d | | j | d | _ d S | | j d| _ | j s7d S d S )Nr r )recvac_in_buffer_sizeBlockingIOErrorOSError handle_errorr$ r% r& r' r( r lenr. r r) r+ r# findfind_prefix_at_end)r r lbr+ nterminator_lenindexr r r handle_readz sV zasync_chat.handle_readc C | d S r ) initiate_sendr" r r r handle_write zasync_chat.handle_writec C r= r )closer" r r r handle_close r@ zasync_chat.handle_closec C sx t |tttfstdt|| j}t||kr0tdt||D ]}| j |||| q n| j | | d S )Nz#data argument must be byte-ish (%r)r ) r$ r' bytearray memoryview TypeErrortypeac_out_buffer_sizer5 ranger r r> )r r sabsir r r push s zasync_chat.pushc C s | j | | d S r )r r r> )r producerr r r push_with_producer s z async_chat.push_with_producerc C s dS )z4predicate for inclusion in the readable for select() r r" r r r readable s zasync_chat.readablec C s | j p| j S )z4predicate for inclusion in the writable for select())r connectedr" r r r writable s zasync_chat.writablec C s | j d dS )zAautomatically close this channel once the outgoing queue is emptyN)r r r" r r r close_when_done s zasync_chat.close_when_donec C s | j r| jr| j d }|s| j d= |d u r| d S | j}z|d | }W n ty@ | }|r:| j | n| j d= Y q w t|trO| j rOt || j }z| |}W n t yd | Y d S w |r|t|k ss|t|k r~||d | j d< d S | j d= d S d S d S )Nr )r rP rB rG rE more appendleftr$ r% r& r' r( sendr3 r4 r5 )r firstobsr num_sentr r r r> s@ zasync_chat.initiate_sendc C s d| _ | jd d = | j d S r )r r r clearr" r r r discard_buffers s zasync_chat.discard_buffers)NN)__name__ __module__ __qualname____doc__r1 rG r& r( r r r r! r# r- r. r< r? rB rK rM rO rQ rR r> rZ r r r r r < s. H (r c @ s e Zd ZdddZdd ZdS )simple_producer c C s || _ || _d S r )r buffer_size)r r ra r r r r s zsimple_producer.__init__c C sF t | j| jkr| jd | j }| j| jd | _|S | j}d| _|S r )r5 r ra )r resultr r r rS s zsimple_producer.moreN)r` )r[ r\ r] r rS r r r r r_ s r_ c C sD t |d }|r | |d | s |d8 }|r | |d | r|S )NrN )r5 endswith)haystackneedlelr r r r7 7 s r7 ) r^ r collectionsr warningsr DeprecationWarningr r r_ r7 r r r r <module> s \