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selector_events.cpython-38.pyc
U i�fT� � @ s. d Z dZddlZddlZddlZddlZddlZddlZddlZz ddl Z W n e k rd dZ Y nX ddl m Z ddl m Z ddl mZ ddl mZ dd l mZ dd l mZ dd l mZ dd l mZ dd lmZ dd� Zdd� ZG dd� de j�ZG dd� dejej�Z G dd� de �Z G dd� de �Z dS )z�Event loop using a selector and related classes. A selector is a "notify-when-ready" multiplexer. For a subclass which also includes support for signal handling, see the unix_events sub-module. )�BaseSelectorEventLoop� N� )� base_events)� constants)�events)�futures)� protocols)�sslproto)� transports)�trsock)�loggerc C s8 z| � |�}W n tk r$ Y dS X t|j|@ �S d S �NF)�get_key�KeyError�boolr )�selector�fdZevent�key� r �</opt/alt/python38/lib64/python3.8/asyncio/selector_events.py�_test_selector_event s r c C s t d k r t| t j�r td��d S )Nz"Socket cannot be of type SSLSocket)�ssl� isinstanceZ SSLSocket� TypeError)�sockr r r �_check_ssl_socket+ s r c s� e Zd ZdZdS� fdd� ZdTddd�dd�ZdUddddejd �d d �ZdVd d �Z � fdd�Z dd� Z dd� Z dd� Z dd� Zdd� Zdddejfdd �Zdddejfd d �Zddejfd d �Zd!d"� Zd#d$� Zd%d&� Zd'd(� Zd)d*� Zd+d,� Zd-d.� Zd/d0� Zd1d2� Zd3d4� Z d5d6� Z d7d8� Z d9d:� Z d;d<� Z d=d>� Z!d?d@� Z"dAdB� Z#dCdD� Z$dEdF� Z%dGdH� Z&dIdJ� Z'dKdL� Z(dMdN� Z)dOdP� Z*dQdR� Z+� Z,S )Wr zJSelector event loop. See events.EventLoop for API specification. Nc sF t � �� |d krt�� }t�d|jj� || _| � � t � � | _ d S )NzUsing selector: %s) �super�__init__� selectorsZDefaultSelectorr �debug� __class__�__name__� _selector�_make_self_pipe�weakrefZWeakValueDictionary� _transports)�selfr �r r r r 6 s z BaseSelectorEventLoop.__init__��extra�serverc C s t | |||||�S �N)�_SelectorSocketTransport)r& r �protocol�waiterr) r* r r r �_make_socket_transport@ s �z,BaseSelectorEventLoop._make_socket_transportF)� server_side�server_hostnamer) r* �ssl_handshake_timeoutc C s0 t j| |||||| d�} t| || ||d� | jS )N)r2 r( )r Z SSLProtocolr, Z_app_transport) r& Zrawsockr- � sslcontextr. r0 r1 r) r* r2 Z ssl_protocolr r r �_make_ssl_transportE s � �z)BaseSelectorEventLoop._make_ssl_transportc C s t | |||||�S r+ )�_SelectorDatagramTransport)r& r r- �addressr. r) r r r �_make_datagram_transportR s �z.BaseSelectorEventLoop._make_datagram_transportc sL | � � rtd��| �� r d S | �� t� �� | jd k rH| j�� d | _d S )Nz!Cannot close a running event loop)Z is_running� RuntimeError� is_closed�_close_self_piper �closer" �r& r' r r r; W s zBaseSelectorEventLoop.closec C sB | � | j�� � | j�� d | _| j�� d | _| jd8 _d S )Nr )�_remove_reader�_ssock�filenor; �_csock� _internal_fdsr< r r r r: b s z&BaseSelectorEventLoop._close_self_pipec C sN t �� \| _| _| j�d� | j�d� | jd7 _| �| j�� | j� d S )NFr ) �socketZ socketpairr> r@ � setblockingrA � _add_readerr? �_read_from_selfr< r r r r# j s z%BaseSelectorEventLoop._make_self_pipec C s d S r+ r �r& �datar r r �_process_self_datar s z(BaseSelectorEventLoop._process_self_datac C sX z"| j �d�}|sW qT| �|� W q tk r: Y q Y q tk rP Y qTY q X q d S )Ni )r> �recvrH �InterruptedError�BlockingIOErrorrF r r r rE u s z%BaseSelectorEventLoop._read_from_selfc C sN | j }|d krd S z|�d� W n( tk rH | jrDtjddd� Y nX d S )N� z3Fail to write a null byte into the self-pipe socketT��exc_info)r@ �send�OSError�_debugr r )r& Zcsockr r r �_write_to_self� s �z$BaseSelectorEventLoop._write_to_self�d c C s" | � |�� | j||||||� d S r+ )rD r? �_accept_connection)r& �protocol_factoryr r3 r* �backlogr2 r r r �_start_serving� s �z$BaseSelectorEventLoop._start_servingc C s t |�D ]�}z0|�� \}} | jr0t�d|| |� |�d� W n� tttfk rZ Y d S t k r� } zd| j t j t j t j t jfkr�| �d| t�|�d�� | �|�� � | �tj| j||||||� n� W 5 d } ~ X Y qX d| i} | �||| |||�} | �| � qd S )Nz#%r got a new connection from %r: %rFz&socket.accept() out of system resource)�message� exceptionrB �peername)�range�acceptrQ r r rC rK rJ �ConnectionAbortedErrorrP �errnoZEMFILEZENFILEZENOBUFSZENOMEM�call_exception_handlerr �TransportSocketr= r? Z call_laterr ZACCEPT_RETRY_DELAYrW �_accept_connection2Z create_task) r& rU r r3 r* rV r2 �_�conn�addr�excr) r\ r r r rT � sV � �� � �z(BaseSelectorEventLoop._accept_connectionc � s� d }d }zt|� }| � � } |r8| j|||| d|||d�}n| j||| ||d�}z| I d H W n tk rx |�� � Y nX W nt ttfk r� � Y n\ tk r� } z>| jr�d| d�} |d k r�|| d< |d k r�|| d< | �| � W 5 d } ~ X Y nX d S )NT)r. r0 r) r* r2 )r. r) r* z3Error on transport creation for incoming connection)rX rY r- � transport) � create_futurer4 r/ � BaseExceptionr; � SystemExit�KeyboardInterruptrQ r_ ) r& rU rc r) r3 r* r2 r- rf r. re �contextr r r ra � sP � � �z)BaseSelectorEventLoop._accept_connection2c C s� |}t |t�sJzt|�� �}W n* tttfk rH td|���d �Y nX z| j| }W n tk rl Y n X |�� s�t d|�d|����d S )NzInvalid file object: zFile descriptor z is used by transport ) r �intr? �AttributeErrorr � ValueErrorr% r � is_closingr8 )r& r r? rf r r r �_ensure_fd_no_transport� s �z-BaseSelectorEventLoop._ensure_fd_no_transportc G s� | � � t�||| d �}z| j�|�}W n* tk rR | j�|tj|d f� Y n>X |j|j }\}}| j� ||tjB ||f� |d k r�|� � d S r+ ) � _check_closedr �Handler" r r �registerr � EVENT_READrG �modify�cancel� r& r �callback�argsZhandler �mask�reader�writerr r r rD s � �z!BaseSelectorEventLoop._add_readerc C s� | � � r dS z| j�|�}W n tk r2 Y dS X |j|j }\}}|tj M }|sd| j�|� n| j� ||d |f� |d k r�|� � dS dS d S �NFT) r9 r" r r r rG r rt � unregisterru rv �r& r r rz r{ r| r r r r= s z$BaseSelectorEventLoop._remove_readerc G s� | � � t�||| d �}z| j�|�}W n* tk rR | j�|tjd |f� Y n>X |j|j }\}}| j� ||tjB ||f� |d k r�|� � d S r+ ) rq r rr r" r r rs r � EVENT_WRITErG ru rv rw r r r � _add_writer% s � �z!BaseSelectorEventLoop._add_writerc C s� | � � r dS z| j�|�}W n tk r2 Y dS X |j|j }\}}|tj M }|sd| j�|� n| j� |||df� |dk r�|� � dS dS dS )�Remove a writer callback.FNT) r9 r" r r r rG r r� r~ ru rv r r r r �_remove_writer4 s z$BaseSelectorEventLoop._remove_writerc G s | � |� | j||f|�� S )zAdd a reader callback.)rp rD �r& r rx ry r r r � add_readerK s z BaseSelectorEventLoop.add_readerc C s | � |� | �|�S )zRemove a reader callback.)rp r= �r& r r r r � remove_readerP s z#BaseSelectorEventLoop.remove_readerc G s | � |� | j||f|�� S )zAdd a writer callback..)rp r� r� r r r � add_writerU s z BaseSelectorEventLoop.add_writerc C s | � |� | �|�S )r� )rp r� r� r r r � remove_writerZ s z#BaseSelectorEventLoop.remove_writerc � s� t |� | jr"|�� dkr"td��z |�|�W S ttfk rF Y nX | �� }|�� }| � || j |||� |� t � | j|�� |I dH S )z�Receive data from the socket. The return value is a bytes object representing the data received. The maximum amount of data to be received at once is specified by nbytes. r � the socket must be non-blockingN)r rQ � gettimeoutrn rI rK rJ rg r? r� � _sock_recv�add_done_callback� functools�partial�_sock_read_done)r& r �n�futr r r r � sock_recv_ s �z BaseSelectorEventLoop.sock_recvc C s | � |� d S r+ )r� �r& r r� r r r r� t s z%BaseSelectorEventLoop._sock_read_donec C s� |� � r d S z|�|�}W n\ ttfk r4 Y d S ttfk rL � Y n6 tk rv } z|�|� W 5 d }~X Y n X |�|� d S r+ ) �donerI rK rJ ri rj rh � set_exception� set_result)r& r� r r� rG re r r r r� w s z BaseSelectorEventLoop._sock_recvc � s� t |� | jr"|�� dkr"td��z |�|�W S ttfk rF Y nX | �� }|�� }| � || j |||� |� t � | j|�� |I dH S )z�Receive data from the socket. The received data is written into *buf* (a writable buffer). The return value is the number of bytes written. r r� N)r rQ r� rn � recv_intorK rJ rg r? r� �_sock_recv_intor� r� r� r� )r& r �bufr� r r r r �sock_recv_into� s �z$BaseSelectorEventLoop.sock_recv_intoc C s� |� � r d S z|�|�}W n\ ttfk r4 Y d S ttfk rL � Y n6 tk rv } z|�|� W 5 d }~X Y n X |�|� d S r+ ) r� r� rK rJ ri rj rh r� r� )r& r� r r� �nbytesre r r r r� � s z%BaseSelectorEventLoop._sock_recv_intoc � s� t |� | jr"|�� dkr"td��z|�|�}W n ttfk rL d}Y nX |t|�kr^dS | �� }|� � }|� t � | j |�� | �|| j||t|�|g� |I dH S )a� Send data to the socket. The socket must be connected to a remote socket. This method continues to send data from data until either all data has been sent or an error occurs. None is returned on success. On error, an exception is raised, and there is no way to determine how much data, if any, was successfully processed by the receiving end of the connection. r r� N)r rQ r� rn rO rK rJ �lenrg r? r� r� r� �_sock_write_doner� � _sock_sendall� memoryview)r& r rG r� r� r r r r � sock_sendall� s& � �z"BaseSelectorEventLoop.sock_sendallc C s� |� � r d S |d }z|�||d � �}W nb ttfk rD Y d S ttfk r\ � Y n2 tk r� } z|�|� W Y �d S d }~X Y nX ||7 }|t|�kr�|� d � n||d< d S )Nr ) r� rO rK rJ ri rj rh r� r� r� )r& r� r Zview�pos�startr� re r r r r� � s z#BaseSelectorEventLoop._sock_sendallc � s� t |� | jr"|�� dkr"td��ttd�r8|jtjkrf| j||j|j | d�I dH }|d \}}}}}| � � }| � |||� |I dH S )zTConnect to a remote socket at address. This method is a coroutine. r r� �AF_UNIX)�family�proto�loopN) r rQ r� rn �hasattrrB r� r� Z_ensure_resolvedr� rg � _sock_connect)r& r r6 Zresolvedrb r� r r r � sock_connect� s � z"BaseSelectorEventLoop.sock_connectc C s� |� � }z|�|� W n� ttfk rV |�t�| j|�� | �|| j |||� Y nN t t fk rn � Y n6 t k r� } z|� |� W 5 d }~X Y n X |�d � d S r+ )r? ZconnectrK rJ r� r� r� r� r� �_sock_connect_cbri rj rh r� r� )r& r� r r6 r re r r r r� � s � z#BaseSelectorEventLoop._sock_connectc C s | � |� d S r+ )r� r� r r r r� s z&BaseSelectorEventLoop._sock_write_donec C s� |� � r d S z,|�tjtj�}|dkr6t|d|� ���W nZ ttfk rP Y nN tt fk rh � Y n6 t k r� } z|� |� W 5 d }~X Y n X |� d � d S )Nr zConnect call failed ) r� Z getsockoptrB Z SOL_SOCKETZSO_ERRORrP rK rJ ri rj rh r� r� )r& r� r r6 �errre r r r r� s z&BaseSelectorEventLoop._sock_connect_cbc � sB t |� | jr"|�� dkr"td��| �� }| �|d|� |I dH S )aW Accept a connection. The socket must be bound to an address and listening for connections. The return value is a pair (conn, address) where conn is a new socket object usable to send and receive data on the connection, and address is the address bound to the socket on the other end of the connection. r r� FN)r rQ r� rn rg � _sock_accept)r& r r� r r r � sock_accept s z!BaseSelectorEventLoop.sock_acceptc C s� |� � }|r| �|� |�� r"d S z|�� \}}|�d� W nn ttfk rh | �|| j|d|� Y nR t t fk r� � Y n: t k r� } z|� |� W 5 d }~X Y nX |� ||f� d S r} )r? r� r� r\ rC rK rJ r� r� ri rj rh r� r� )r& r� Z registeredr r rc r6 re r r r r� * s z"BaseSelectorEventLoop._sock_acceptc � sp | j |j= |�� }|�� |�� I d H z | j|j|||dd�I d H W �S |�� |r^|�� || j |j< X d S )NF)Zfallback) r% �_sock_fd� is_reading� pause_reading�_make_empty_waiter�_reset_empty_waiter�resume_readingZ sock_sendfile�_sock)r& Ztransp�file�offset�countr� r r r �_sendfile_native< s �z&BaseSelectorEventLoop._sendfile_nativec C s� |D ]v\}}|j |j }\}}|tj@ rL|d k rL|jrB| �|� n | �|� |tj@ r|d k r|jrp| �|� q| �|� qd S r+ ) �fileobjrG r rt Z _cancelledr= Z _add_callbackr� r� )r& Z event_listr rz r� r{ r| r r r �_process_eventsJ s z%BaseSelectorEventLoop._process_eventsc C s | � |�� � |�� d S r+ )r= r? r; )r& r r r r � _stop_servingX s z#BaseSelectorEventLoop._stop_serving)N)N)N)NNN)-r! � __module__� __qualname__�__doc__r r/ r ZSSL_HANDSHAKE_TIMEOUTr4 r7 r; r: r# rH rE rR rW rT ra rp rD r= r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� r� � __classcell__r r r' r r 0 s~ � � � � � � . � ) r c s� e Zd ZdZeZdZd � fdd� Zdd� Zdd� Z d d � Z d d � Z d d� Z dd� Z ejfdd�Zd dd�Zdd� Zdd� Zdd� Zd d � Z� ZS ) �_SelectorTransporti Nc s� t � �||� t�|�| jd< z|�� | jd< W n tk rN d | jd< Y nX d| jkr�z|�� | jd< W n tj k r� d | jd< Y nX || _ |� � | _ d| _ | �|� || _| �� | _d| _d| _| jd k r�| j�� | |j| j < d S )NrB ZsocknamerZ Fr )r r r r` �_extraZ getsocknamerP Z getpeernamerB �errorr� r? r� �_protocol_connected� set_protocol�_server�_buffer_factory�_buffer� _conn_lost�_closingZ_attachr% )r& r� r r- r) r* r' r r r i s, z_SelectorTransport.__init__c C s� | j jg}| jd kr |�d� n| jr0|�d� |�d| j� �� | jd k r�| j�� s�t| jj | jt j �}|rz|�d� n |�d� t| jj | jt j �}|r�d}nd}| � � }|�d|� d |� d �� d �d �|��S ) N�closed�closingzfd=z read=pollingz read=idle�pollingZidlezwrite=<z , bufsize=�>z<{}>� )r r! r� �appendr� r� �_loopr9 r r" r rt r� �get_write_buffer_size�format�join)r& �infor� �state�bufsizer r r �__repr__� s0 � �z_SelectorTransport.__repr__c C s | � d � d S r+ )� _force_closer< r r r �abort� s z_SelectorTransport.abortc C s || _ d| _d S �NT)� _protocolr� �r& r- r r r r� � s z _SelectorTransport.set_protocolc C s | j S r+ )r� r< r r r � get_protocol� s z _SelectorTransport.get_protocolc C s | j S r+ )r� r< r r r ro � s z _SelectorTransport.is_closingc C sT | j r d S d| _ | j�| j� | jsP| jd7 _| j�| j� | j�| jd � d S �NTr ) r� r� r= r� r� r� r� � call_soon�_call_connection_lostr< r r r r; � s z_SelectorTransport.closec C s, | j d k r(|d| ��t| d� | j �� d S )Nzunclosed transport )�source)r� �ResourceWarningr; )r& Z_warnr r r �__del__� s z_SelectorTransport.__del__�Fatal error on transportc C sN t |t�r(| j�� r@tjd| |dd� n| j�||| | jd�� | �|� d S )Nz%r: %sTrM )rX rY rf r- ) r rP r� � get_debugr r r_ r� r� )r& re rX r r r � _fatal_error� s �z _SelectorTransport._fatal_errorc C sd | j r d S | jr(| j�� | j�| j� | jsBd| _| j�| j� | j d7 _ | j�| j |� d S r� ) r� r� �clearr� r� r� r� r= r� r� �r& re r r r r� � s z _SelectorTransport._force_closec C sV z| jr| j�|� W 5 | j �� d | _ d | _d | _| j}|d k rP|�� d | _X d S r+ )r� r; r� r� r� Z_detachr� Zconnection_lost)r& re r* r r r r� � s z(_SelectorTransport._call_connection_lostc C s t | j�S r+ )r� r� r< r r r r� � s z(_SelectorTransport.get_write_buffer_sizec G s" | j r d S | jj||f|�� d S r+ )r� r� rD r� r r r rD � s z _SelectorTransport._add_reader)NN)r� )r! r� r� �max_size� bytearrayr� r� r r� r� r� r� ro r; �warnings�warnr� r� r� r� r� rD r� r r r' r r� ] s r� c s� e Zd ZdZejjZd#� fdd� Z� fdd�Z dd� Z d d � Z d d � Z d d� Z dd� Zdd� Zdd� Zdd� Zdd� Zdd� Zdd � Z� fd d �Zd d � Zd!d"� Z� ZS )$r, TNc s~ d | _ t� �|||||� d| _d| _d | _t�| j� | j � | j j | � | j � | j | j| j� |d k rz| j � tj|d � d S r )�_read_ready_cbr r �_eof�_paused� _empty_waiterr Z _set_nodelayr� r� r� r� �connection_maderD r� � _read_readyr � _set_result_unless_cancelled)r& r� r r- r. r) r* r' r r r � s � �z!_SelectorSocketTransport.__init__c s. t |tj�r| j| _n| j| _t� �|� d S r+ )r r ZBufferedProtocol�_read_ready__get_bufferr� �_read_ready__data_receivedr r� r� r' r r r� s z%_SelectorSocketTransport.set_protocolc C s | j o| j S r+ )r� r� r< r r r r� s z#_SelectorSocketTransport.is_readingc C s> | j s | jrd S d| _| j�| j� | j�� r:t�d| � d S )NTz%r pauses reading)r� r� r� r= r� r� r r r< r r r r� s z&_SelectorSocketTransport.pause_readingc C s@ | j s | jsd S d| _| �| j| j� | j�� r<t�d| � d S )NFz%r resumes reading) r� r� rD r� r� r� r� r r r< r r r r� s z'_SelectorSocketTransport.resume_readingc C s | � � d S r+ )r� r< r r r r� $ s z$_SelectorSocketTransport._read_readyc C s` | j r d S z | j�d�}t|�s(td��W nL ttfk rD � Y n4 tk rv } z| �|d� W Y �d S d }~X Y nX z| j � |�}W nd t t fk r� Y d S ttfk r� � Y n4 tk r� } z| �|d� W Y �d S d }~X Y nX |�s | � � d S z| j�|� W nJ ttfk �r, � Y n0 tk �rZ } z| �|d� W 5 d }~X Y nX d S )N���z%get_buffer() returned an empty bufferz/Fatal error: protocol.get_buffer() call failed.�$Fatal read error on socket transportz3Fatal error: protocol.buffer_updated() call failed.)r� r� Z get_bufferr� r8 ri rj rh r� r� r� rK rJ �_read_ready__on_eofZbuffer_updated)r& r� re r� r r r r� ' sF � �z0_SelectorSocketTransport._read_ready__get_bufferc C s� | j r d S z| j�| j�}W nd ttfk r6 Y d S ttfk rN � Y n4 tk r� } z| � |d� W Y �d S d }~X Y nX |s�| � � d S z| j � |� W nF ttfk r� � Y n. tk r� } z| � |d� W 5 d }~X Y nX d S )Nr� z2Fatal error: protocol.data_received() call failed.) r� r� rI r� rK rJ ri rj rh r� r� r� Z data_received)r& rG re r r r r� L s. �z3_SelectorSocketTransport._read_ready__data_receivedc C s� | j �� rt�d| � z| j�� }W nL ttfk r> � Y n4 tk rp } z| � |d� W Y �d S d }~X Y nX |r�| j � | j � n| � � d S )Nz%r received EOFz1Fatal error: protocol.eof_received() call failed.) r� r� r r r� Z eof_receivedri rj rh r� r= r� r; )r& Z keep_openre r r r r� e s �z,_SelectorSocketTransport._read_ready__on_eofc C s6 t |tttf�s$tdt|�j����| jr2td��| j d k rDtd��|sLd S | j rz| j t j krht �d� | j d7 _ d S | j�s z| j�|�}W nb ttfk r� Y nb ttfk r� � Y nJ tk r� } z| �|d� W Y �d S d }~X Y nX ||d � }|�s d S | j�| j| j� | j� |� | � � d S )N�/data argument must be a bytes-like object, not z%Cannot call write() after write_eof()z(unable to write; sendfile is in progress� socket.send() raised exception.r �%Fatal write error on socket transport) r �bytesr� r� r �typer! 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