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asynchat.cpython-310.pyc
o �If - � @ s^ d Z ddlZddlmZ ddlmZ ededd� G dd � d ej�ZG 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(dd�Zdd � 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$d%� Zd&d'� ZdS ))� async_chatz�This is an abstract class. You must derive from this class, and add the two methods collect_incoming_data() and found_terminator()i r zlatin-1Nc C s( d| _ g | _t� | _tj�| ||� d S �N� )� ac_in_buffer�incomingr � producer_fifo�asyncore� dispatcher�__init__)�self�sock�map� r �./opt/saltstack/salt/lib/python3.10/asynchat.pyr K s zasync_chat.__init__c C � t d���Nz must be implemented in subclass��NotImplementedError�r �datar r r �collect_incoming_dataY � z async_chat.collect_incoming_datac C s | j �|� d S �N)r �appendr r r r �_collect_incoming_data\ s z!async_chat._collect_incoming_datac C s d� | j�}| jd d �= |S r )�joinr )r �dr r r � _get_data_ s zasync_chat._get_datac C r r r �r r r r �found_terminatord r zasync_chat.found_terminatorc C sB t |t�r| jrt|| j�}n t |t�r |dk r td��|| _dS )zdSet the input delimiter. Can be a fixed string of any length, an integer, or None. r z-the number of received bytes must be positiveN)� isinstance�str� use_encoding�bytes�encoding�int� ValueError� terminator)r Ztermr r r �set_terminatorg s zasync_chat.set_terminatorc C s | j S r )r+ r" r r r �get_terminatorr s zasync_chat.get_terminatorc C s� z| � | j�}W n ty Y d S ty | �� Y d S w t|t�r.| jr.tt| j �}| j | | _ | j r�t | j �}| � � }|sL| � | j � d| _ n�t|t�r�|}||k rg| � | j � d| _ | j| | _np| � | j d |� � | j |d � | _ d| _| �� nVt |�}| j �|�}|dkr�|dkr�| � | j d |� � | j || d � | _ | �� n+t| j |�}|r�||kr�| � | j d | � � | j | d � | _ d S | � | j � d| _ | j s7d S d S )Nr r ���)�recv�ac_in_buffer_size�BlockingIOError�OSError� handle_errorr$ r% r& r' r( r �lenr- r r) r+ r# �find�find_prefix_at_end)r r Zlbr+ �nZterminator_len�indexr 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 |tttf�stdt|���| j}t|�|kr0tdt|�|�D ]}| j � |||| � � q n| j � |� | � � d S )Nz#data argument must be byte-ish (%r)r ) r$ r' � bytearray� memoryview� TypeError�type�ac_out_buffer_sizer4 �ranger r r; )r r Zsabs�ir r r �push� s � � zasync_chat.pushc C s | j �|� | �� d S r )r r r; )r Zproducerr 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|t�rO| 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 rK r? rD rB �more� appendleftr$ r% r& r' r( �sendr2 r3 r4 )r �firstZobsr Znum_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__r0 rD r& r( r r r r! r# r, r- r9 r< r? rG rH rJ rL rM r; rS r r r r r < s. H (r c @ s e Zd Zddd�Zdd� ZdS )�simple_producer� c C s || _ || _d S r )r � buffer_size)r r rZ r r r r s zsimple_producer.__init__c C sF t | j�| jkr| jd | j� }| j| jd � | _|S | j}d| _|S r )r4 r rZ )r �resultr r r rN s zsimple_producer.moreN)rY )rT rU rV r rN r r r r rX s rX c C sD t |�d }|r | �|d |� �s |d8 }|r | �|d |� �r|S )NrI )r4 �endswith)ZhaystackZneedle�lr r r r6 7 s �r6 ) rW r � collectionsr �warningsr �DeprecationWarningr r rX r6 r r r r �<module> s � \