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selector_events.cpython-39.pyc
a DOgL @ s$ d Z dZddlZddlZddlZddlZddlZddlZddlZz ddl Z W n e yb dZ Y n0 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 ZG dd de jZG dd dejejZG dd deZ G dd deZ dS )zEvent 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 s6 z| |}W n ty" Y dS 0 t|j|@ S d S NF)get_keyKeyErrorboolr )selectorfdeventkey r //usr/lib64/python3.9/asyncio/selector_events.py_test_selector_event s r c s e Zd ZdZdS fdd ZdTdddddZdUddddejd d d ZdVd d Z fddZ 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 dWd5d6Z d7d8 Z d9d: Z d;d< Z d=d> Z!d?d@ Z"dAdB Z#dCdD Z$dXdEdFZ%dGdH Z&dIdJ Z'dKdL Z(dMdN Z)dOdP Z*dQdR Z+ Z,S )Yr zJSelector event loop. See events.EventLoop for API specification. Nc sF t |d u rt }td|jj || _| t | _ d S )NzUsing selector: %s) super__init__ selectorsDefaultSelectorr debug __class____name__ _selector_make_self_pipeweakrefWeakValueDictionary _transports)selfr r r r r 1 s z BaseSelectorEventLoop.__init__extraserverc C s t | |||||S N)_SelectorSocketTransport)r$ sockprotocolwaiterr' r( r r r _make_socket_transport; s z,BaseSelectorEventLoop._make_socket_transportF) server_sideserver_hostnamer' r( ssl_handshake_timeoutc C s0 t j| |||||| d} t| || ||d | jS )N)r1 r& )r Z SSLProtocolr* Z_app_transport) r$ Zrawsockr, sslcontextr- r/ r0 r' r( r1 Z ssl_protocolr r r _make_ssl_transport@ s z)BaseSelectorEventLoop._make_ssl_transportc C s t | |||||S r) )_SelectorDatagramTransport)r$ r+ r, addressr- r' r r r _make_datagram_transportM s z.BaseSelectorEventLoop._make_datagram_transportc sL | rtd| r d S | t | jd urH| 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: R s zBaseSelectorEventLoop.closec C sB | | j | j d | _| j d | _| jd8 _d S )Nr )_remove_reader_ssockfilenor: _csock _internal_fdsr; r r r r9 ] s z&BaseSelectorEventLoop._close_self_pipec C sN t \| _| _| jd | jd | jd7 _| | j | j d S )NFr ) socket socketpairr= r? setblockingr@ _add_readerr> _read_from_selfr; r r r r e s z%BaseSelectorEventLoop._make_self_pipec C s d S r) r r$ datar r r _process_self_datam s z(BaseSelectorEventLoop._process_self_datac C sT z"| j d}|sW qP| | W q ty8 Y q Y q tyL Y qPY q 0 q d S )Ni )r= recvrH InterruptedErrorBlockingIOErrorrF r r r rE p s z%BaseSelectorEventLoop._read_from_selfc C sL | j }|d u rd S z|d W n& tyF | jrBtjddd Y n0 d S )N z3Fail to write a null byte into the self-pipe socketTexc_info)r? sendOSError_debugr r )r$ csockr r r _write_to_self| s z$BaseSelectorEventLoop._write_to_selfd c C s" | | | j|||||| d S r) )rD r> _accept_connection)r$ protocol_factoryr+ r2 r( backlogr1 r r r _start_serving s z$BaseSelectorEventLoop._start_servingc C s t |D ]}z0| \}} | jr0td|| | |d W n tttfyX Y d S t y } zl| j t j t j t j t jfv r| d| t|d | | | tj| j|||||| n W Y d } ~ qd } ~ 0 0 d| i} | ||| |||} | | qd S )Nz#%r got a new connection from %r: %rFz&socket.accept() out of system resource)message exceptionrA peername)rangeacceptrQ r r rC rK rJ ConnectionAbortedErrorrP errnoZEMFILEZENFILEZENOBUFSZENOMEMcall_exception_handlerr TransportSocketr< r> Z call_laterr ZACCEPT_RETRY_DELAYrX _accept_connection2Z create_task) r$ rV r+ r2 r( rW r1 _connaddrexcr' r] r r r rU s@ z(BaseSelectorEventLoop._accept_connectionc s d }d }zr| }| } |r8| j|||| d|||d}n| j||| ||d}z| I d H W n tyv | Y n0 W nt ttfy Y n^ ty } zF| jrd| d} |d ur|| d< |d ur|| d< | | W Y d } ~ n d } ~ 0 0 d S )NT)r- r/ r' r( r1 )r- r' r( z3Error on transport creation for incoming connection)rY rZ r, transport) create_futurer3 r. BaseExceptionr: SystemExitKeyboardInterruptrQ r` ) r$ rV rd r' r2 r( r1 r, rg r- rf contextr r r rb s@ z)BaseSelectorEventLoop._accept_connection2c C s |}t |tsHzt| }W n( tttfyF td|d Y n0 z| j| }W n tyh Y n 0 | st d|d|d S )NzInvalid file object: zFile descriptor z is used by transport ) isinstanceintr> AttributeError TypeError ValueErrorr# r is_closingr7 )r$ r r> rg r r r _ensure_fd_no_transport s z-BaseSelectorEventLoop._ensure_fd_no_transportc G s | t||| d }z| j|}W n( tyP | j|tj|d f Y n>0 |j|j }\}}| j ||tjB ||f |d ur| |S r) ) _check_closedr Handler r r registerr EVENT_READrG modifycancel r$ r callbackargshandler maskreaderwriterr r r rD s z!BaseSelectorEventLoop._add_readerc C s | r dS z| j|}W n ty0 Y dS 0 |j|j }\}}|tj M }|sb| j| n| j ||d |f |d ur| dS dS d S )NFT) r8 r r r r rG r rw unregisterrx ry r$ r r r~ r r r r r r< s z$BaseSelectorEventLoop._remove_readerc G s | t||| d }z| j|}W n( tyP | j|tjd |f Y n>0 |j|j }\}}| j ||tjB ||f |d ur| |S r) ) rt r ru r r r rv r EVENT_WRITErG rx ry rz r r r _add_writer! s z!BaseSelectorEventLoop._add_writerc C s | r dS z| j|}W n ty0 Y dS 0 |j|j }\}}|tj M }|sb| j| n| j |||df |dur| dS dS dS )Remove a writer callback.FNT) r8 r r r r rG r r r rx ry r r r r _remove_writer1 s z$BaseSelectorEventLoop._remove_writerc G s" | | | j||g|R dS )zAdd a reader callback.N)rs rD r$ r r{ r| r r r add_readerH s z BaseSelectorEventLoop.add_readerc C s | | | |S )zRemove a reader callback.)rs r< r$ r r r r remove_readerM s z#BaseSelectorEventLoop.remove_readerc G s" | | | j||g|R dS )zAdd a writer callback..N)rs r r r r r add_writerR s z BaseSelectorEventLoop.add_writerc C s | | | |S )r )rs r r r r r remove_writerW s z#BaseSelectorEventLoop.remove_writerc s t | | jr$| dkr$tdz ||W S ttfyF Y n0 | }| }| | | || j |||}| tj| j||d |I dH S )zReceive 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-blockingr} N)r _check_ssl_socketrQ gettimeoutrq rI rK rJ rh r> rs rD _sock_recvadd_done_callback functoolspartial_sock_read_done)r$ r+ nfutr r} r r r sock_recv\ s z BaseSelectorEventLoop.sock_recvc C s |d u s| s| | d S r) ) cancelledr r$ r r r} r r r r r s z%BaseSelectorEventLoop._sock_read_donec C s | r d S z||}W nZ ttfy2 Y d S ttfyH Y n8 tyt } z|| W Y d }~nd }~0 0 || d S r) ) donerI rK rJ rj rk ri set_exception set_result)r$ r r+ r rG rf r r r r v s z BaseSelectorEventLoop._sock_recvc s t | | jr$| dkr$tdz ||W S ttfyF Y n0 | }| }| | | || j |||}| tj| j||d |I dH S )zReceive 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 r N)r r rQ r rq recv_intorK rJ rh r> rs rD _sock_recv_intor r r r )r$ r+ bufr r r} r r r sock_recv_into s z$BaseSelectorEventLoop.sock_recv_intoc C s | r d S z||}W nZ ttfy2 Y d S ttfyH Y n8 tyt } z|| W Y d }~nd }~0 0 || d S r) ) r r rK rJ rj rk ri r r )r$ r r+ r nbytesrf r r r r s z%BaseSelectorEventLoop._sock_recv_intoc s t | | jr$| dkr$tdz||}W n ttfyL d}Y n0 |t|kr^dS | }| }| | | || j ||t||g}|tj| j||d |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 Nr )r r rQ r rq rO rK rJ lenrh r> rs r _sock_sendall memoryviewr r r _sock_write_done)r$ r+ rG r r r r} r r r sock_sendall s& z"BaseSelectorEventLoop.sock_sendallc C s | r d S |d }z|||d }W n\ ttfyB Y d S ttfyX Y n0 ty } z|| W Y d }~d S d }~0 0 ||7 }|t|kr| d n||d< d S )Nr ) r rO rK rJ rj rk ri r r r )r$ r r+ viewposstartr rf r r r r s z#BaseSelectorEventLoop._sock_sendallc s t | | jr$| dkr$td|jtjksBt jrt|jtj krt| j ||j|j |j | dI dH }|d \}}}}}| }| ||| |I dH S )zTConnect to a remote socket at address. This method is a coroutine. r r )familytypeprotoloopN)r r rQ r rq r rA AF_INETZ _HAS_IPv6AF_INET6Z_ensure_resolvedr r rh _sock_connect)r$ r+ r5 Zresolvedrc r r r r sock_connect s z"BaseSelectorEventLoop.sock_connectc C s | }z|| W n ttfyb | | | || j|||}|tj | j ||d Y nN t t fyx Y n8 t y } z|| W Y d }~nd }~0 0 |d d S )Nr )r> connectrK rJ rs r _sock_connect_cbr r r r rj rk ri r r )r$ r r+ r5 r r} rf r r r r s z#BaseSelectorEventLoop._sock_connectc C s |d u s| s| | d S r) )r r r r r r r s z&BaseSelectorEventLoop._sock_write_donec C s | r d S z,|tjtj}|dkr6t|d| W nX ttfyN Y nN tt fyd Y n8 t y } z| | W Y d }~nd }~0 0 | d d S )Nr zConnect call failed ) r getsockoptrA SOL_SOCKETSO_ERRORrP rK rJ rj rk ri r r )r$ r r+ r5 errrf r r r r s z&BaseSelectorEventLoop._sock_connect_cbc sB t | | jr$| dkr$td| }| || |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 N)r r rQ r rq rh _sock_accept)r$ r+ r r r r sock_accept" s z!BaseSelectorEventLoop.sock_acceptc C s | }z| \}}|d W n ttfyl | | | || j||}|t j | j ||d Y nR t t fy Y n< ty } z|| W Y d }~nd }~0 0 |||f d S )NFr )r> r] rC rK rJ rs rD r r r r r rj rk ri r r )r$ r r+ r rd r5 r} rf r r r r 1 s z"BaseSelectorEventLoop._sock_acceptc s | j |j= | }| | I d H zL| j|j|||ddI d H W | |rZ| || j |j< S || j |j< n"| |r| || j |j< 0 d S )NF)fallback) r# _sock_fd is_reading pause_reading_make_empty_waiterZ sock_sendfile_sock_reset_empty_waiterresume_reading)r$ Ztranspfileoffsetcountr r r r _sendfile_nativeB s* z&BaseSelectorEventLoop._sendfile_nativec C s |D ]v\}}|j |j }\}}|tj@ rL|d urL|jrB| | n | | |tj@ r|d ur|jrp| | q| | qd S r) ) fileobjrG r rw Z _cancelledr< Z _add_callbackr r )r$ Z event_listr r~ r r r r r r _process_eventsP s z%BaseSelectorEventLoop._process_eventsc C s | | | d S r) )r< r> r: )r$ r+ r r r _stop_serving^ s z#BaseSelectorEventLoop._stop_serving)N)N)N)NNN)N)N)-r __module__ __qualname____doc__r r. r ZSSL_HANDSHAKE_TIMEOUTr3 r6 r: r9 r rH rE rS rX rU rb rs 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 + sj . ) r c s e Zd ZdZeZdZd fdd Zdd Zdd Z d d Z d d Z d d Z dd Z ejfddZd ddZdd Zdd Zdd Zd d Z ZS ) _SelectorTransporti Nc s t || t|| jd< z| | jd< W n tyL d | jd< Y n0 d| jvrz| | jd< W n tj y d | jd< Y n0 || _ | | _ d| _ | | || _| | _d| _d| _| jd ur| j | |j| j < d S )NrA Zsocknamer[ Fr )r r r ra _extra getsocknamerP getpeernamerA 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 o s, z_SelectorTransport.__init__c C s | j jg}| jd u r |d n| jr0|d |d| j | jd ur| j st| jj | jt j }|rz|d n |d t| jj | jt j }|rd}nd}| }|d| d | d d d |S ) Nclosedclosingzfd=z read=pollingz read=idlepollingZidlezwrite=<z , bufsize=>z<{}> )r r r appendr r _loopr8 r r r rw r get_write_buffer_sizeformatjoin)r$ infor statebufsizer r r __repr__ s. 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 rr 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 ur(|d| t| d | j d S )Nzunclosed transport )source)r ResourceWarningr: )r$ _warnr r r __del__ s z_SelectorTransport.__del__Fatal error on transportc C sN t |tr(| j r@tjd| |dd n| j||| | jd | | d S )Nz%r: %sTrM )rY rZ rg r, ) rm rP r get_debugr r r` r r )r$ rf rY 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$ rf r r r r s z _SelectorTransport._force_closec C s zN| j r| j| W | j d | _d | _d | _| j}|d ur| d | _n:| j d | _d | _d | _| j}|d ur| d | _0 d S r) )r r Zconnection_lostr r: r r Z_detach)r$ rf r( r r r r s& z(_SelectorTransport._call_connection_lostc C s t | jS r) )r r r; r r r r s z(_SelectorTransport.get_write_buffer_sizec G s$ | j r d S | jj||g|R 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 rr r: warningswarnr r r r r rD r r r r% r r c s r c s e Zd ZdZejjZd# fdd Z fddZ 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 )$r* TNc s~ d | _ t ||||| d| _d| _d | _t| j | j | j j | | j | j | j| j |d urz| j tj|d d S r )_read_ready_cbr r _eof_paused _empty_waiterr Z _set_nodelayr r r r connection_maderD r _read_readyr _set_result_unless_cancelled)r$ r r+ r, r- r' r( r% r r r s z!_SelectorSocketTransport.__init__c s. t |tjr| j| _n| j| _t | d S r) )rm 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:td| 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<td| 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$_SelectorSocketTransport._read_readyc C sV | j r d S z | jd}t|s(tdW nH ttfyB Y n2 tyr } z| |d W Y d }~d S d }~0 0 z| j |}W n^ t t fy Y d S ttfy Y n2 ty } z| |d W Y d }~d S d }~0 0 | s| d S z| j| W nJ ttfy Y n2 tyP } z| |d W Y d }~n d }~0 0 d S )Nz%get_buffer() returned an empty bufferz/Fatal error: protocol.get_buffer() call failed.$Fatal read error on socket transportz3Fatal error: protocol.buffer_updated() call failed.)r r Z get_bufferr r7 rj rk ri r r r rK rJ _read_ready__on_eofZbuffer_updated)r$ r rf r r r r r - sB z0_SelectorSocketTransport._read_ready__get_bufferc C s | j r d S z| j| j}W n^ ttfy4 Y d S ttfyJ Y n2 tyz } z| |d W Y d }~d S d }~0 0 |s| d S z| j | W nF ttfy Y n0 ty } z| |d W Y d }~n d }~0 0 d S )Nr z2Fatal error: protocol.data_received() call failed.) r r rI r rK rJ rj rk ri r r r Z data_received)r$ rG rf r r r r R s, z3_SelectorSocketTransport._read_ready__data_receivedc C s | j rtd| z| j }W nH ttfy< Y n2 tyl } z| |d W Y d }~d S d }~0 0 |r| j | j n| d S )Nz%r received EOFz1Fatal error: protocol.eof_received() call failed.) r r r r r Z eof_receivedrj rk ri r r< r r: )r$ Z keep_openrf r r r r k s z,_SelectorSocketTransport._read_ready__on_eofc C s0 t |tttfs$tdt|j| jr2td| j d urDtd|sLd S | j rz| j t j krht d | j d7 _ d S | jsz| j|}W n\ ttfy Y n^ ttfy Y nH ty } z| |d W Y d }~d S d }~0 0 ||d }|sd S | j| j| j | j | | d S )N/data argument must be a bytes-like object, not z%Cannot call write() after write_eof()z(unable to write; sendfile is in progress socket.send() raised exception.r %Fatal write error on socket transport) rm bytesr r rp r r r r7 r r r !LOG_THRESHOLD_FOR_CONNLOST_WRITESr warningr r rO rK rJ rj rk ri r r r r _write_readyextend_maybe_pause_protocol)r$ rG r rf r r r write s> z _SelectorSocketTransport.writec C s& | j sJ d| jrd S z| j| j }W n ttfy@ Y n ttfyV Y n ty } zF| j | j | j | |d | jd ur| j| W Y d }~nxd }~0 0 |r| j d |= | | j s"| j | j | jd ur| jd | jr | d n| jr"| jtj d S )NzData should not be emptyr )r r r rO rK rJ rj rk ri r r r r r r r _maybe_resume_protocolr r r r shutdownrA SHUT_WR)r$ r rf r r r r s4 " z%_SelectorSocketTransport._write_readyc C s. | j s | jrd S d| _| js*| jtj d S r )r r r r r rA r r; r r r write_eof s z"_SelectorSocketTransport.write_eofc C s dS r r r; r r r can_write_eof s z&_SelectorSocketTransport.can_write_eofc s* t | | jd ur&| jtd d S )Nz Connection is closed by peer)r r r r ConnectionErrorr r% r r r s z._SelectorSocketTransport._call_connection_lostc C s6 | j d urtd| j | _ | js0| j d | j S )NzEmpty waiter is already set)r r7 r rh r r r; r r r r s z+_SelectorSocketTransport._make_empty_waiterc C s d | _ d S r) )r r; r r r r s z,_SelectorSocketTransport._reset_empty_waiter)NNN)r r r Z_start_tls_compatibler Z _SendfileModeZ TRY_NATIVEZ_sendfile_compatibler r r r r r r r r r r r r r r r r r r r% r r* s( %' r* c sF e Zd ZejZd fdd Zdd Zdd Zd dd Z d d Z Z S )r4 Nc s^ t |||| || _| j| jj| | j| j| j| j |d urZ| jt j |d d S r) ) r r _addressr r r r rD r r r r )r$ r r+ r, r5 r- r' r% r r r s z#_SelectorDatagramTransport.__init__c C s t dd | jD S )Nc s s | ]\}}t |V qd S r) )r ).0rG rc r r r <genexpr> zC_SelectorDatagramTransport.get_write_buffer_size.<locals>.<genexpr>)sumr r; r r r r s z0_SelectorDatagramTransport.get_write_buffer_sizec C s | j r d S z| j| j\}}W n ttfy6 Y n tyd } z| j| W Y d }~n\d }~0 t t fyz Y n> t y } z| |d W Y d }~nd }~0 0 | j || d S )Nz&Fatal read error on datagram transport)r r recvfromr rK rJ rP r error_receivedrj rk ri r Zdatagram_receivedr$ rG re rf r r r r s "z&_SelectorDatagramTransport._read_readyc C s t |tttfs$tdt|j|s,d S | jrV|d | jfvrPtd| j | j}| j r| jr| j t j krxt d | j d7 _ d S | jsdz,| jd r| j| n| j|| W d S ttfy | j| j| j Y n~ ty } z| j| W Y d }~d S d }~0 t t fy0 Y n4 t yb } z| |d W Y d }~d S d }~0 0 | j t||f | ! d S )Nr z!Invalid address: must be None or r r r[ 'Fatal write error on datagram transport)"rm r r r rp r r r rq r r r r r r r r rO sendtorK rJ r r r _sendto_readyrP r r rj rk ri r r r r! r r r r# sJ z!_SelectorDatagramTransport.sendtoc C s | j r| j \}}z*| jd r.| j| n| j|| W q ttfyh | j ||f Y qY q t y } z| j | W Y d }~d S d }~0 t t fy Y q ty } z| |d W Y d }~d S d }~0 0 q | | j s| j| j | jr| d d S )Nr[ r" )r popleftr r rO r# rK rJ appendleftrP r r rj rk ri r r r r r r r r! r r r r$ 0 s0 z(_SelectorDatagramTransport._sendto_ready)NNN)N) r r r collectionsdequer r r r r# r$ r r r r% r r4 s +r4 ) r __all__r' r_ r r rA r r! Zssl ImportError r r r r r r r r logr r Z BaseEventLoopr Z_FlowControlMixinZ Transportr r* r4 r r r r <module> sD < o