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selector_events.cpython-36.pyc
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For a subclass which also includes support for signal handling, see the unix_events sub-module. �BaseSelectorEventLoop� N� )� base_events)�compat)� constants)�events)�futures)� selectors)� transports)�sslproto)� coroutine)�loggerc C s6 y| j |�}W n tk r" dS X t|j|@ �S d S )NF)�get_key�KeyError�boolr )�selector�fdZevent�key� r �//usr/lib64/python3.6/asyncio/selector_events.py�_test_selector_event s r c sr e Zd ZdZdO� fdd� ZdPddd�dd�ZdQddddd �d d �Zddddd �d d �ZdRdd�Z� fdd�Z dd� Z dd� Z dd� Z dd� Z dd� Zd d � ZdSd d �ZdTd!d"�ZedUd#d$��Zd%d&� Zd'd(� Zd)d*� Zd+d,� Zd-d.� Zd/d0� Zd1d2� Zd3d4� Zd5d6� Z d7d8� Z d9d:� Z d;d<� Z d=d>� Z ed?d@� �Z!dAdB� Z"dCdD� Z#dEdF� Z$dGdH� Z%dIdJ� Z&dKdL� Z'dMdN� Z(� Z)S )Vr zJSelector event loop. See events.EventLoop for API specification. Nc sF t � j� |d krtj� }tjd|jj� || _| j � t j � | _ d S )NzUsing selector: %s) �super�__init__r ZDefaultSelectorr �debug� __class__�__name__� _selector�_make_self_pipe�weakref�WeakValueDictionary� _transports)�selfr )r r r r 1 s z BaseSelectorEventLoop.__init__)�extra�serverc C s t | |||||�S )N)�_SelectorSocketTransport)r! �sock�protocol�waiterr" r# r r r �_make_socket_transport; s z,BaseSelectorEventLoop._make_socket_transportF)� server_side�server_hostnamer" r# c C sN t j� s"| j||||||||d�S t j| |||||�} t| || ||d� | jS )N)r) r* r" r# )r" r# )r Z_is_sslproto_available�_make_legacy_ssl_transportZ SSLProtocolr$ Z_app_transport) r! �rawsockr& � sslcontextr' r) r* r" r# Z ssl_protocolr r r �_make_ssl_transport@ s z)BaseSelectorEventLoop._make_ssl_transportc C s t | ||||||||� S )N)�_SelectorSslTransport) r! r, r& r- r' r) r* r" r# r r r r+ O s z0BaseSelectorEventLoop._make_legacy_ssl_transportc C s t | |||||�S )N)�_SelectorDatagramTransport)r! r% r& �addressr' r" r r r �_make_datagram_transportY s z.BaseSelectorEventLoop._make_datagram_transportc sL | j � rtd��| j� r d S | j� t� j� | jd k rH| jj� d | _d S )Nz!Cannot close a running event loop)Z is_running� RuntimeError� is_closed�_close_self_piper �closer )r! )r r r r6 ^ s zBaseSelectorEventLoop.closec C s t �d S )N)�NotImplementedError)r! r r r � _socketpairi s z!BaseSelectorEventLoop._socketpairc C sB | j | jj� � | jj� d | _| jj� d | _| jd8 _d S )Nr )�_remove_reader�_ssock�filenor6 �_csock� _internal_fds)r! r r r r5 l s z&BaseSelectorEventLoop._close_self_pipec C sN | j � \| _| _| jjd� | jjd� | jd7 _| j| jj� | j� d S )NFr )r8 r: r< � setblockingr= � _add_readerr; �_read_from_self)r! r r r r t s z%BaseSelectorEventLoop._make_self_pipec C s d S )Nr )r! �datar r r �_process_self_data| s z(BaseSelectorEventLoop._process_self_datac C sV xPy | j jd�}|sP | j|� W q tk r8 wY q tk rL P Y qX qW d S )Ni )r: �recvrB �InterruptedError�BlockingIOError)r! rA r r r r@ s z%BaseSelectorEventLoop._read_from_selfc C sJ | j }|d k rFy|jd� W n( tk rD | jr@tjddd� 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$BaseSelectorEventLoop._write_to_self�d c C s | j |j� | j|||||� d S )N)r? r; �_accept_connection)r! �protocol_factoryr% r- r# �backlogr r r �_start_serving� s z$BaseSelectorEventLoop._start_servingc C s� x�t |�D ]�}y0|j� \}}| jr2tjd|||� |jd� W n� tttfk rX d S t k r� } z^| j t j t j t j t jfkr�| jd| |d�� | j|j� � | jtj| j|||||� n� W Y d d } ~ X q X d|i} | j||| ||�} | j| � q W d S )Nz#%r got a new connection from %r: %rFz&socket.accept() out of system resource)�message� exception�socket�peername)�range�acceptrJ r r r> rE rD �ConnectionAbortedErrorrI �errnoZEMFILEZENFILEZENOBUFSZENOMEM�call_exception_handlerr9 r; Z call_laterr ZACCEPT_RETRY_DELAYrP �_accept_connection2Z create_task) r! rN r% r- r# rO �_�conn�addr�excr" rV r r r rM � s4 z(BaseSelectorEventLoop._accept_connectionc c s� d }d }yj|� }| j � }|r6| j||||d||d�}n| j|||||d�}y|E d H W n |j� � Y nX W n\ tk r� } z@| jr�d| d�} |d k r�|| d< |d k r�|| d< | j| � W Y d d } ~ X nX d S )NT)r' r) r" r# )r' r" r# z3Error on transport creation for incoming connection)rQ rR r& � transport)� create_futurer. r( r6 � ExceptionrJ rY ) r! rN r\ r" r- r# r& r_ r' r^ �contextr r r rZ � s4 z)BaseSelectorEventLoop._accept_connection2c C s@ y| j | }W n tk r" Y nX |j� s<tdj||���d S )Nz.File descriptor {!r} is used by transport {!r})r r � is_closingr3 �format)r! r r_ r r r �_ensure_fd_no_transport� s z-BaseSelectorEventLoop._ensure_fd_no_transportc G s� | j � tj||| �}y| jj|�}W n* tk rP | jj|tj|d f� Y n>X |j|j }\}}| jj ||tjB ||f� |d k r�|j � d S )N) � _check_closedr �Handler r r �registerr � EVENT_READrA �modify�cancel) r! r �callback�args�handler �mask�reader�writerr r r r? � s z!BaseSelectorEventLoop._add_readerc C s� | j � r dS y| jj|�}W n tk r0 dS X |j|j }\}}|tj M }|sb| jj|� n| jj ||d |f� |d k r�|j � dS dS d S )NFT) r4 r r r r rA r ri � unregisterrj rk )r! r r ro rp rq r r r r9 s z$BaseSelectorEventLoop._remove_readerc G s� | j � tj||| �}y| jj|�}W n* tk rP | jj|tjd |f� Y n>X |j|j }\}}| jj ||tjB ||f� |d k r�|j � d S )N) rf r rg r r r rh r � EVENT_WRITErA rj rk ) r! r rl rm rn r ro rp rq r r r � _add_writer s z!BaseSelectorEventLoop._add_writerc C s� | j � r dS y| jj|�}W n tk r0 dS X |j|j }\}}|tj M }|sb| jj|� n| jj |||df� |dk r�|j � dS dS dS )zRemove a writer callback.FNT) r4 r r r r rA r rs rr rj rk )r! r r ro rp rq r r r �_remove_writer, s z$BaseSelectorEventLoop._remove_writerc G s | j |� | j||f|�� S )zAdd a reader callback.)re r? )r! r rl rm r r r � add_readerC s z BaseSelectorEventLoop.add_readerc C s | j |� | j|�S )zRemove a reader callback.)re r9 )r! r r r r � remove_readerH s z#BaseSelectorEventLoop.remove_readerc G s | j |� | j||f|�� S )zAdd a writer callback..)re rt )r! r rl rm r r r � add_writerM s z BaseSelectorEventLoop.add_writerc C s | j |� | j|�S )zRemove a writer callback.)re ru )r! r r r r � remove_writerR s z#BaseSelectorEventLoop.remove_writerc C s6 | j r|j� dkrtd��| j� }| j|d||� |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. This method is a coroutine. r z the socket must be non-blockingN)rJ � gettimeout� ValueErrorr` � _sock_recv)r! r% �n�futr r r � sock_recvW s z BaseSelectorEventLoop.sock_recvc C s� |d k r| j |� |j� r d S y|j|�}W n` ttfk rb |j� }| j|| j||||� Y n6 tk r� } z|j |� W Y d d }~X n X |j |� d S )N) rw � cancelledrC rE rD r; rv r| ra � set_exception� set_result)r! r~ � registered_fdr% r} rA r r^ r r r r| f s z BaseSelectorEventLoop._sock_recvc C sF | j r|j� dkrtd��| j� }|r8| j|d||� n |jd� |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. This method is a coroutine. r z the socket must be non-blockingN)rJ rz r{ r` � _sock_sendallr� )r! r% rA r~ r r r � sock_sendall{ s z"BaseSelectorEventLoop.sock_sendallc C s� |d k r| j |� |j� r d S y|j|�}W nD ttfk rH d}Y n* tk rp } z|j|� d S d }~X nX |t|�kr�|jd � n.|r�||d � }|j � }| j || j ||||� d S )Nr ) ry r� rH rE rD ra r� �lenr� r; rx r� )r! r~ r� r% rA r} r^ r r r r r� � s" z#BaseSelectorEventLoop._sock_sendallc c s� | j r|j� dkrtd��ttd� s2|jtjkrptj||j|j | d�}|j � sZ|E dH |j � d \}}}}}| j � }| j |||� |E dH S )zTConnect to a remote socket at address. This method is a coroutine. r z the socket must be non-blocking�AF_UNIX)�family�proto�loopN)rJ rz r{ �hasattrrS r� r� r Z_ensure_resolvedr� �done�resultr` � _sock_connect)r! r% r1 Zresolvedr[ r~ r r r � sock_connect� s z"BaseSelectorEventLoop.sock_connectc C s� |j � }y|j|� W nj ttfk rV |jtj| j|�� | j|| j |||� Y n6 t k r� } z|j |� W Y d d }~X n X |j d � d S )N) r; ZconnectrE rD Zadd_done_callback� functools�partial�_sock_connect_donerx �_sock_connect_cbra r� r� )r! r~ r% r1 r r^ r r r r� � s z#BaseSelectorEventLoop._sock_connectc C s | j |� d S )N)ry )r! r r~ r r r r� � s z(BaseSelectorEventLoop._sock_connect_donec C s� |j � r d S y,|jtjtj�}|dkr6t|d|f ��W nB ttfk rP Y n6 tk rz } z|j |� W Y d d }~X n X |j d � d S )Nr zConnect call failed %s) r� Z getsockoptrS Z SOL_SOCKETZSO_ERRORrI rE rD ra r� r� )r! r~ r% r1 �errr^ r r r r� � s z&BaseSelectorEventLoop._sock_connect_cbc C s4 | j r|j� dkrtd��| j� }| j|d|� |S )a| 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. This method is a coroutine. r z the socket must be non-blockingF)rJ rz r{ r` � _sock_accept)r! r% r~ r r r � sock_accept� s z!BaseSelectorEventLoop.sock_acceptc C s� |j � }|r| j|� |j� r"d S y|j� \}}|jd� W nV ttfk rh | j|| j|d|� Y n: t k r� } z|j |� W Y d d }~X nX |j ||f� d S )NFT) r; rw r� rV r> rE rD rv r� ra r� r� )r! r~ Z registeredr% r r\ r1 r^ r r r r� � s z"BaseSelectorEventLoop._sock_acceptc C s� x~|D ]v\}}|j |j }\}}|tj@ rN|d k rN|jrD| j|� n | j|� |tj@ r|d k r|jrr| j|� q| j|� qW d S )N) �fileobjrA r ri Z _cancelledr9 Z _add_callbackrs ru )r! Z event_listr ro r� rp rq r r r �_process_events� s z%BaseSelectorEventLoop._process_eventsc C s | j |j� � |j� d S )N)r9 r; r6 )r! r% r r r � _stop_serving s z#BaseSelectorEventLoop._stop_serving)N)N)N)NNN)NNrL )NNrL )NN)*r � __module__� __qualname__�__doc__r r( r. r+ r2 r6 r8 r5 r rB r@ rK rP rM r rZ re r? r9 rt ru rv rw rx ry r r| r� r� r� r� r� r� r� r� r� r� � __classcell__r r )r r r + sT ( # c s� e Zd Zd ZeZdZd � fdd� Zdd� Zdd � Z d d � Z d d � Z dd� Z dd� Z ejr`dd� Zd!dd�Zdd� Zdd� Zdd � Zd d � Z� ZS )"�_SelectorTransport� i Nc s� t � j||� || jd< |j� | jd< d| jkrdy|j� | jd< W n tjk rb d | jd< Y nX || _|j� | _ || _ d| _ || _ | j � | _d| _d| _| j d k r�| j j� | |j| j < d S )NrS ZsocknamerT Tr F)r r �_extraZ getsocknameZ getpeernamerS �error�_sockr; �_sock_fd� _protocol�_protocol_connected�_server�_buffer_factory�_buffer� _conn_lost�_closingZ_attachr )r! r� r% r& r" r# )r r r r s& z_SelectorTransport.__init__c C s� | j jg}| jd kr |jd� n| jr0|jd� |jd| j � | jd k r�| jj� r�t| jj | jt j �}|rz|jd� n |jd� t| jj | jt j �}|r�d}nd}| j � }|jd||f � d d j|� S ) N�closed�closingzfd=%sz read=pollingz read=idle�pollingZidlezwrite=<%s, bufsize=%s>z<%s>� )r r r� �appendr� r� �_loopr4 r r r ri rs �get_write_buffer_size�join)r! �infor� �state�bufsizer r r �__repr__2 s* z_SelectorTransport.__repr__c C s | j d � d S )N)� _force_close)r! r r r �abortN s z_SelectorTransport.abortc C s || _ d S )N)r� )r! r& r r r � set_protocolQ s z _SelectorTransport.set_protocolc C s | j S )N)r� )r! r r r � get_protocolT s z _SelectorTransport.get_protocolc C s | j S )N)r� )r! r r r rc W s z _SelectorTransport.is_closingc C sT | j r d S d| _ | jj| j� | jsP| jd7 _| jj| j� | jj| jd � d S )NTr ) r� r� r9 r� r� r� ru � call_soon�_call_connection_lost)r! r r r r6 Z s z_SelectorTransport.closec C s, | j d k r(tjd| t| d� | j j� d S )Nzunclosed transport %r)�source)r� �warnings�warn�ResourceWarningr6 )r! r r r �__del__h s z_SelectorTransport.__del__�Fatal error on transportc C sP t |tj�r*| jj� rBtjd| |dd� n| jj||| | jd�� | j |� d S )Nz%r: %sT)rG )rQ rR r_ r& ) � isinstancer Z_FATAL_ERROR_IGNOREr� � get_debugr r rY r� r� )r! r^ rQ r r r � _fatal_errorn s z _SelectorTransport._fatal_errorc C sd | j r d S | jr(| jj� | jj| j� | jsBd| _| jj| j� | j d7 _ | jj| j |� d S )NTr ) r� r� �clearr� ru r� r� r9 r� r� )r! r^ r r r r� | s z _SelectorTransport._force_closec C sV z| j r| jj|� W d | jj� d | _d | _d | _| j}|d k rP|j� d | _X d S )N)r� r� Zconnection_lostr� r6 r� r� Z_detach)r! r^ r# r r r r� � s z(_SelectorTransport._call_connection_lostc C s t | j�S )N)r� r� )r! r r r r� � s z(_SelectorTransport.get_write_buffer_sizec G s" | j r d S | jj||f|�� d S )N)r� r� r? )r! r rl rm r r r r? � s z _SelectorTransport._add_readeri )NN)r� )r r� r� �max_size� bytearrayr� r� r r� r� r� r� rc r6 r ZPY34r� r� r� r� r� r? r� r r )r r r� s" r� c sV e Zd Zd� fdd� Zdd� Zdd� Zdd � Zd d � Zd d � Zdd� Z dd� Z � Z S )r$ Nc sr t � j|||||� d| _d| _tj| j� | jj| j j | � | jj| j | j | j � |d k rn| jjtj|d � d S )NF)r r �_eof�_pausedr Z _set_nodelayr� r� r� r� �connection_mader? r� � _read_readyr � _set_result_unless_cancelled)r! r� r% r& r' r" r# )r r r r � s z!_SelectorSocketTransport.__init__c C s> | j s | jrd S d| _| jj| j� | jj� r:tjd| � d S )NTz%r pauses reading)r� r� r� r9 r� r� r r )r! r r r � pause_reading� s z&_SelectorSocketTransport.pause_readingc C sB | j s| j rd S d| _| j| j| j� | jj� r>tjd| � d S )NFz%r resumes reading) r� r� r? r� r� r� r� r r )r! r r r �resume_reading� s z'_SelectorSocketTransport.resume_readingc C s� | j r d S y| jj| j�}W nD ttfk r4 Y n| tk r` } z| j|d� W Y d d }~X nPX |rt| jj |� n<| j j � r�t j d| � | jj� }|r�| j j| j� n| j� d S )Nz$Fatal read error on socket transportz%r received EOF)r� r� rC r� rE rD ra r� r� � data_receivedr� r� r r � eof_receivedr9 r� r6 )r! rA r^ � keep_openr r r r� � s z$_SelectorSocketTransport._read_readyc C s� t |tttf�s"tdt|�j ��| jr0td��|s8d S | j rf| j t j krTt j d� | j d7 _ d S | js�y| jj|�}W nB ttfk r� Y n@ tk r� } z| j|d� d S d }~X nX ||d � }|s�d S | jj| j| j� | jj|� | j� d S )Nz1data argument must be a bytes-like object, not %rz%Cannot call write() after write_eof()z socket.send() raised exception.r z%Fatal write error on socket transport)r� �bytesr� � memoryview� TypeError�typer r� r3 r� r �!LOG_THRESHOLD_FOR_CONNLOST_WRITESr �warningr� r� rH rE rD ra r� r� rt r� � _write_ready�extend�_maybe_pause_protocol)r! rA r} r^ r r r �write� s4 z _SelectorSocketTransport.writec C s� | j std��| jrd S y| jj| j �}W n\ ttfk rB Y n� tk r� } z*| jj | j � | j j � | j |d� W Y d d }~X nTX |r�| j d |�= | j � | j s�| jj | j � | jr�| jd � n| jr�| jjtj� d S )NzData should not be emptyz%Fatal write error on socket transport)r� �AssertionErrorr� r� rH rE rD ra r� ru r� r� r� �_maybe_resume_protocolr� r� r� �shutdownrS �SHUT_WR)r! r} r^ r r r r� s( z%_SelectorSocketTransport._write_readyc C s. | j s | jrd S d| _| js*| jjtj� d S )NT)r� r� r� r� r� rS r� )r! r r r � write_eof s z"_SelectorSocketTransport.write_eofc C s dS )NTr )r! r r r � can_write_eof s z&_SelectorSocketTransport.can_write_eof)NNN) r r� r� r r� r� r� r� r� r� r� r� r r )r r r$ � s #r$ c sd e Zd ZeZd� fdd� Zddd�Zdd� Zd d � Zd d � Z d d� Z dd� Z dd� Z dd� Z � ZS )r/ NFc s� t d krtd��|s tj||�}|dd�} |r<| r<|| d< |j|f| �} t� j|| ||| � d| _|| _|| _ || _ d| _ | j j |d� | jj� r�tjd| � | jj� } nd } | j| � d S )Nz stdlib ssl module not availableF)r) Zdo_handshake_on_connectr* )r- z%r starts SSL handshake)�sslr3 r Z_create_transport_contextZ wrap_socketr r r� �_server_hostname�_waiter� _sslcontextr� r� �updater� r� r r �time� _on_handshake) r! r� r, r& r- r' r) r* r" r# Z wrap_kwargsZsslsock� start_time)r r r r ( s* z _SelectorSslTransport.__init__c C sD | j d krd S | j j� s:|d k r.| j j|� n | j jd � d | _ d S )N)r� r� r� r� )r! r^ r r r �_wakeup_waiterL s z$_SelectorSslTransport._wakeup_waiterc " C s$ y| j j� W n� tjk r8 | jj| j| j|� d S tjk r` | jj | j| j|� d S t k r� } z`| jj � r�t j d| dd� | jj| j� | jj| j� | j j� | j|� t|t�r�d S � W Y d d }~X nX | jj| j� | jj| j� | j j� }t| jd��s�| j�r�| jjtjk�r�ytj|| j� W nR tk �r� } z4| jj � �rjt j d| dd� | j j� | j|� d S d }~X nX | jj || j j � | j j � | j d� d| _ d| _ | jj| j| j!� d| _"| jj#| j$j%| � | jj#| j� | jj � �r | jj&� | }t j'd| |d � d S ) Nz%r: SSL handshake failedT)rG Zcheck_hostnamez1%r: SSL handshake failed on matching the hostname)�peercert�cipher� compressionZ ssl_objectFz %r: SSL handshake took %.1f msg @�@)(r� Z do_handshaker� �SSLWantReadErrorr� r? r� r� �SSLWantWriteErrorrt � BaseExceptionr� r r� r9 ru r6 r� r� ra Z getpeercertr� r� r� Z verify_modeZ CERT_NONEZmatch_hostnamer� r� r� r� �_read_wants_write�_write_wants_readr� r� r� r� r� r� r )r! r� r^ r� Zdtr r r r� V sb z#_SelectorSslTransport._on_handshakec C sJ | j rtd��| jr td��d| _| jj| j� | jj� rFtjd| � d S )Nz#Cannot pause_reading() when closingzAlready pausedTz%r pauses reading) r� r3 r� r� r9 r� r� r r )r! r r r r� � s z#_SelectorSslTransport.pause_readingc C sJ | j std��d| _ | jr d S | jj| j| j� | jj� rFtj d| � d S )Nz Not pausedFz%r resumes reading) r� r3 r� r� r? r� r� r� r r )r! r r r r� � s z$_SelectorSslTransport.resume_readingc C s" | j r d S | jr6d| _| j� | jr6| jj| j| j� y| jj| j �}W n� t t t j fk rd Y n� t jk r� d| _| jj| j� | jj| j| j� Y n� tk r� } z| j|d� W Y d d }~X nTX |r�| jj|� n@z4| jj� r�tjd| � | jj� }|�rtjd� W d | j� X d S )NFTz!Fatal read error on SSL transportz%r received EOFz?returning true from eof_received() has no effect when using ssl)r� r� r� r� r� rt r� r� rC r� rE rD r� r� r� r� r9 ra r� r� r� r� r r r� r� r6 )r! rA r^ r� r r r r� � s4 z!_SelectorSslTransport._read_readyc C s( | j r d S | jr<d| _| j� | jp(| js<| jj| j| j� | jr�y| j j | j�}W n� t t t jfk rt d}Y np t jk r� d}| jj| j� d| _Y nD tk r� } z(| jj| j� | jj� | j|d� d S d }~X nX |r�| jd |�= | j� | j�s$| jj| j� | j�r$| jd � d S )NFr Tz"Fatal write error on SSL transport)r� r� r� r� r� r� r? r� r� r� rH rE rD r� r� r� ru r� ra r� r� r� r� )r! r} r^ r r r r� � s8 z"_SelectorSslTransport._write_readyc C s� t |tttf�s"tdt|�j ��|s*d S | jrX| jtj krFt j d� | jd7 _d S | j sp| j j| j| j� | j j|� | j� d S )Nz1data argument must be a bytes-like object, not %rz socket.send() raised exception.r )r� r� r� r� r� r� r r� r r� r r� r� r� rt r� r� r� r� )r! rA r r r r� � s z_SelectorSslTransport.writec C s dS )NFr )r! r r r r� s z#_SelectorSslTransport.can_write_eof)NFNNN)N)r r� r� r� r� r r� r� r� r� r� r� r� r� r� r r )r r r/ $ s " ? 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