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streams.cpython-38.opt-1.pyc
U e5d h � @ s& d Z ddlZddlZddlZddlZeed�r6e d7 Z ddlmZ ddlmZ ddlm Z dd lm Z dd lm Z dd l m Z dd lmZ d Zd ded�dd�Zd ded�dd�Zeed�r�d!ded�dd�Zd"ded�dd�ZG dd� de j�ZG dd� dee j�ZG dd � d �ZG d d � d �ZdS )#)� StreamReader� StreamWriter�StreamReaderProtocol�open_connection� start_server� NZAF_UNIX)�open_unix_connection�start_unix_server� )� coroutines)�events)� exceptions)�format_helpers)� protocols)�logger)�sleepi )�loop�limitc � st |dkrt �� }ntjdtdd� t||d�}t||d�� |j� fdd�| |f|�I dH \}}t|� ||�}||fS ) a� A wrapper for create_connection() returning a (reader, writer) pair. The reader returned is a StreamReader instance; the writer is a StreamWriter instance. The arguments are all the usual arguments to create_connection() except protocol_factory; most common are positional host and port, with various optional keyword arguments following. Additional optional keyword arguments are loop (to set the event loop instance to use) and limit (to set the buffer limit passed to the StreamReader). (If you want to customize the StreamReader and/or StreamReaderProtocol classes, just copy the code -- there's really nothing special here except some convenience.) N�[The loop argument is deprecated since Python 3.8, and scheduled for removal in Python 3.10.� �� stacklevel�r r �r c s � S �N� r ��protocolr �'/usr/lib64/python3.8/asyncio/streams.py�<lambda>5 � z!open_connection.<locals>.<lambda>) r �get_event_loop�warnings�warn�DeprecationWarningr r Zcreate_connectionr ) �host�portr r �kwds�reader� transport�_�writerr r r r s" � ��r c � sJ �dkrt �� �ntjdtdd� � ��fdd�}�j|||f|�I dH S )a� Start a socket server, call back for each client connected. The first parameter, `client_connected_cb`, takes two parameters: client_reader, client_writer. client_reader is a StreamReader object, while client_writer is a StreamWriter object. This parameter can either be a plain callback function or a coroutine; if it is a coroutine, it will be automatically converted into a Task. The rest of the arguments are all the usual arguments to loop.create_server() except protocol_factory; most common are positional host and port, with various optional keyword arguments following. The return value is the same as loop.create_server(). Additional optional keyword arguments are loop (to set the event loop instance to use) and limit (to set the buffer limit passed to the StreamReader). The return value is the same as loop.create_server(), i.e. a Server object which can be used to stop the service. Nr r r c s t ��d�} t| � �d�}|S �Nr r �r r �r' r ��client_connected_cbr r r r �factoryX s �z start_server.<locals>.factory)r r r! r" r# Z create_server)r/ r$ r% r r r& r0 r r. r r : s �r c � sr |dkrt �� }ntjdtdd� t||d�}t||d�� |j� fdd�| f|�I dH \}}t|� ||�}||fS ) z@Similar to `open_connection` but works with UNIX Domain Sockets.Nr r r r r c s � S r r r r r r r p r z&open_unix_connection.<locals>.<lambda>) r r r! r" r# r r Zcreate_unix_connectionr )�pathr r r& r' r( r) r* r r r r d s � ��r c � sH �dkrt �� �ntjdtdd� � ��fdd�}�j||f|�I dH S )z=Similar to `start_server` but works with UNIX Domain Sockets.Nr r r c s t ��d�} t| � �d�}|S r+ r, r- r. r r r0 ~ s �z"start_unix_server.<locals>.factory)r r r! r" r# Zcreate_unix_server)r/ r1 r r r& r0 r r. r r t s �r c @ sB e Zd ZdZddd�Zdd� Zdd� Zd d � Zd d � Zd d� Z dS )�FlowControlMixina) Reusable flow control logic for StreamWriter.drain(). This implements the protocol methods pause_writing(), resume_writing() and connection_lost(). If the subclass overrides these it must call the super methods. StreamWriter.drain() must wait for _drain_helper() coroutine. Nc C s0 |d krt �� | _n|| _d| _d | _d| _d S �NF)r r �_loop�_paused� _drain_waiter�_connection_lost)�selfr r r r �__init__� s zFlowControlMixin.__init__c C s d| _ | j�� r t�d| � d S )NTz%r pauses writing)r5 r4 � get_debugr �debug�r8 r r r � pause_writing� s z FlowControlMixin.pause_writingc C sF d| _ | j�� r t�d| � | j}|d k rBd | _|�� sB|�d � d S )NFz%r resumes writing)r5 r4 r: r r; r6 �done� set_result�r8 �waiterr r r �resume_writing� s z FlowControlMixin.resume_writingc C sV d| _ | jsd S | j}|d kr"d S d | _|�� r4d S |d krH|�d � n |�|� d S �NT)r7 r5 r6 r> r? � set_exception�r8 �excrA r r r �connection_lost� s z FlowControlMixin.connection_lostc � s< | j rtd��| jsd S | j}| j�� }|| _|I d H d S )NzConnection lost)r7 �ConnectionResetErrorr5 r6 r4 � create_futurer@ r r r � _drain_helper� s z FlowControlMixin._drain_helperc C s t �d S r )�NotImplementedError�r8 �streamr r r �_get_close_waiter� s z"FlowControlMixin._get_close_waiter)N) �__name__� __module__� __qualname__�__doc__r9 r= rB rG rJ rN r r r r r2 � s r2 c sf e Zd ZdZdZd� fdd� Zedd� �Zdd� Z� fd d �Z d d � Z d d� Z dd� Z dd� Z � ZS )r a= Helper class to adapt between Protocol and StreamReader. (This is a helper class instead of making StreamReader itself a Protocol subclass, because the StreamReader has other potential uses, and to prevent the user of the StreamReader to accidentally call inappropriate methods of the protocol.) Nc sn t � j|d� |d k r,t�|�| _|j| _nd | _|d k r@|| _d| _d | _d | _ || _ d| _ | j � � | _d S )Nr F)�superr9 �weakref�ref�_stream_reader_wr�_source_traceback�_strong_reader�_reject_connection�_stream_writer� _transport�_client_connected_cb� _over_sslr4 rI �_closed)r8 Z stream_readerr/ r �� __class__r r r9 � s z StreamReaderProtocol.__init__c C s | j d krd S | � � S r )rV r< r r r �_stream_reader� s z#StreamReaderProtocol._stream_readerc C s� | j r6ddi}| jr | j|d< | j�|� |�� d S || _| j}|d k rT|�|� |�d�d k | _ | j d k r�t || || j�| _ | � || j �}t �|�r�| j�|� d | _d S )N�messagezpAn open stream was garbage collected prior to establishing network connection; call "stream.close()" explicitly.Zsource_tracebackZ sslcontext)rY rW r4 Zcall_exception_handler�abortr[ ra � set_transport�get_extra_infor] r\ r rZ r Z iscoroutineZ create_taskrX )r8 r( �contextr' �resr r r �connection_made� s2 � �� z$StreamReaderProtocol.connection_madec sx | j }|d k r*|d kr |�� n |�|� | j�� sV|d krJ| j�d � n | j�|� t� �|� d | _d | _ d | _ d S r ) ra �feed_eofrD r^ r> r? rS rG rV rZ r[ )r8 rF r' r_ r r rG s z$StreamReaderProtocol.connection_lostc C s | j }|d k r|�|� d S r )ra � feed_data)r8 �datar' r r r � data_received s z"StreamReaderProtocol.data_receivedc C s$ | j }|d k r|�� | jr dS dS )NFT)ra ri r] )r8 r' r r r � eof_received s z!StreamReaderProtocol.eof_receivedc C s | j S r )r^ rL r r r rN + s z&StreamReaderProtocol._get_close_waiterc C s" | j }|�� r |�� s |�� d S r )r^ r> � cancelled� exception)r8 �closedr r r �__del__. s z StreamReaderProtocol.__del__)NN)rO rP rQ rR rW r9 �propertyra rh rG rl rm rN rq � __classcell__r r r_ r r � s r c @ sv e Zd ZdZdd� Zdd� Zedd� �Zdd � Zd d � Z d d � Z dd� Z dd� Z dd� Z dd� Zddd�Zdd� ZdS ) r a' Wraps a Transport. This exposes write(), writelines(), [can_]write_eof(), get_extra_info() and close(). It adds drain() which returns an optional Future on which you can wait for flow control. It also adds a transport property which references the Transport directly. c C s4 || _ || _|| _|| _| j�� | _| j�d � d S r )r[ � _protocol�_readerr4 rI Z _complete_futr? )r8 r( r r' r r r r r9 @ s zStreamWriter.__init__c C s@ | j jd| j��g}| jd k r0|�d| j��� d�d�|��S )N� transport=zreader=�<{}>� )r` rO r[ ru �append�format�join�r8 �infor r r �__repr__J s zStreamWriter.__repr__c C s | j S r �r[ r< r r r r( P s zStreamWriter.transportc C s | j �|� d S r )r[ �write�r8 rk r r r r� T s zStreamWriter.writec C s | j �|� d S r )r[ � writelinesr� r r r r� W s zStreamWriter.writelinesc C s | j �� S r )r[ � write_eofr< r r r r� Z s zStreamWriter.write_eofc C s | j �� S r )r[ � can_write_eofr< r r r r� ] s zStreamWriter.can_write_eofc C s | j �� S r )r[ �closer< r r r r� ` s zStreamWriter.closec C s | j �� S r )r[ � is_closingr< r r r r� c s zStreamWriter.is_closingc � s | j �| �I d H d S r )rt rN r< r r r � wait_closedf s zStreamWriter.wait_closedNc C s | j �||�S r )r[ re )r8 �name�defaultr r r re i s zStreamWriter.get_extra_infoc � sL | j dk r | j �� }|dk r |�| j�� r8td�I dH | j�� I dH dS )zyFlush the write buffer. The intended use is to write w.write(data) await w.drain() Nr )ru ro r[ r� r rt rJ )r8 rF r r r �drainl s zStreamWriter.drain)N)rO rP rQ rR r9 r~ rr r( r� r� r� r� r� r� r� re r� r r r r r 6 s r c @ s� e Zd ZdZedfdd�Zdd� Zdd� Zdd � Zd d � Z d d � Z dd� Z dd� Z dd� Z dd� Zdd� Zdd� Zd&dd �Zd'd d �Zd d!� Zd"d#� Zd$d%� ZdS )(r Nc C sv |dkrt d��|| _|d kr*t�� | _n|| _t� | _d| _d | _d | _ d | _ d| _ | j� � rrt �t�d��| _d S )Nr zLimit cannot be <= 0Fr )� ValueError�_limitr r r4 � bytearray�_buffer�_eof�_waiter� _exceptionr[ r5 r: r � extract_stack�sys� _getframerW )r8 r r r r r r9 � s �zStreamReader.__init__c C s� dg}| j r"|�t| j �� d�� | jr2|�d� | jtkrN|�d| j� �� | jrf|�d| j��� | jr~|�d| j��� | jr�|�d| j��� | j r�|�d� d � d � |��S ) Nr z bytes�eofzlimit=zwaiter=z exception=rv Zpausedrw rx ) r� ry �lenr� r� �_DEFAULT_LIMITr� r� r[ r5 rz r{ r| r r r r~ � s zStreamReader.__repr__c C s | j S r )r� r< r r r ro � s zStreamReader.exceptionc C s0 || _ | j}|d k r,d | _|�� s,|�|� d S r )r� r� rn rD rE r r r rD � s zStreamReader.set_exceptionc C s* | j }|dk r&d| _ |�� s&|�d� dS )z1Wakeup read*() functions waiting for data or EOF.N)r� rn r? r@ r r r �_wakeup_waiter� s zStreamReader._wakeup_waiterc C s || _ d S r r )r8 r( r r r rd � s zStreamReader.set_transportc C s* | j r&t| j�| jkr&d| _ | j�� d S r3 )r5 r� r� r� r[ �resume_readingr< r r r �_maybe_resume_transport� s z$StreamReader._maybe_resume_transportc C s d| _ | �� d S rC )r� r� r< r r r ri � s zStreamReader.feed_eofc C s | j o | j S )z=Return True if the buffer is empty and 'feed_eof' was called.)r� r� r< r r r �at_eof� s zStreamReader.at_eofc C st |sd S | j �|� | �� | jd k rp| jspt| j �d| j krpz| j�� W n tk rh d | _Y nX d| _d S )Nr T) r� �extendr� r[ r5 r� r� Z pause_readingrK r� r r r rj � s �� zStreamReader.feed_datac � sX | j dk rt|� d���| jr.d| _| j�� | j�� | _ z| j I dH W 5 d| _ X dS )zpWait until feed_data() or feed_eof() is called. If stream was paused, automatically resume it. NzF() called while another coroutine is already waiting for incoming dataF)r� � RuntimeErrorr5 r[ r� r4 rI )r8 Z func_namer r r �_wait_for_data� s � zStreamReader._wait_for_datac � s� d}t |�}z| �|�I dH }W n� tjk rN } z|j W Y �S d}~X Y nh tjk r� } zH| j�||j�r�| jd|j| �= n | j� � | � � t |j d ��W 5 d}~X Y nX |S )a� Read chunk of data from the stream until newline (b' ') is found. On success, return chunk that ends with newline. If only partial line can be read due to EOF, return incomplete line without terminating newline. When EOF was reached while no bytes read, empty bytes object is returned. If limit is reached, ValueError will be raised. In that case, if newline was found, complete line including newline will be removed from internal buffer. Else, internal buffer will be cleared. Limit is compared against part of the line without newline. If stream was paused, this function will automatically resume it if needed. � Nr ) r� � readuntilr �IncompleteReadError�partial�LimitOverrunErrorr� � startswith�consumed�clearr� r� �args)r8 �sep�seplen�line�er r r �readline s zStreamReader.readliner� c � s� t |�}|dkrtd��| jdk r(| j�d}t | j�}|| |kr|| j�||�}|dkrZq�|d | }|| jkr|t�d|��| jr�t | j�}| j� � t� |d��| � d�I dH q,|| jkr�t�d|��| jd|| � }| jd|| �= | � � t |�S ) aV Read data from the stream until ``separator`` is found. On success, the data and separator will be removed from the internal buffer (consumed). Returned data will include the separator at the end. Configured stream limit is used to check result. Limit sets the maximal length of data that can be returned, not counting the separator. If an EOF occurs and the complete separator is still not found, an IncompleteReadError exception will be raised, and the internal buffer will be reset. The IncompleteReadError.partial attribute may contain the separator partially. If the data cannot be read because of over limit, a LimitOverrunError exception will be raised, and the data will be left in the internal buffer, so it can be read again. r z,Separator should be at least one-byte stringN���r z2Separator is not found, and chunk exceed the limitr� z2Separator is found, but chunk is longer than limit)r� r� r� r� �findr� r r� r� �bytesr� r� r� r� )r8 Z separatorr� �offsetZbuflenZisep�chunkr r r r� ( s> � �zStreamReader.readuntilr� c � s� | j dk r| j �|dkr dS |dk rVg }| �| j�I dH }|s@qL|�|� q(d�|�S | jsr| jsr| �d�I dH t| jd|� �}| jd|�= | � � |S )a� Read up to `n` bytes from the stream. If n is not provided, or set to -1, read until EOF and return all read bytes. If the EOF was received and the internal buffer is empty, return an empty bytes object. If n is zero, return empty bytes object immediately. If n is positive, this function try to read `n` bytes, and may return less or equal bytes than requested, but at least one byte. If EOF was received before any byte is read, this function returns empty byte object. Returned value is not limited with limit, configured at stream creation. If stream was paused, this function will automatically resume it if needed. Nr r �read) r� r� r� ry r{ r� r� r� r� r� )r8 �nZblocks�blockrk r r r r� � s" zStreamReader.readc � s� |dk rt d��| jdk r | j�|dkr,dS t| j�|k rr| jr`t| j�}| j�� t�||��| � d�I dH q,t| j�|kr�t| j�}| j�� n t| jd|� �}| jd|�= | � � |S )a� Read exactly `n` bytes. Raise an IncompleteReadError if EOF is reached before `n` bytes can be read. The IncompleteReadError.partial attribute of the exception will contain the partial read bytes. if n is zero, return empty bytes object. Returned value is not limited with limit, configured at stream creation. If stream was paused, this function will automatically resume it if needed. r z*readexactly size can not be less than zeroNr � readexactly) r� r� r� r� r� r� r� r r� r� r� )r8 r� Z incompleterk r r r r� � s& zStreamReader.readexactlyc C s | S r r r< r r r � __aiter__� s zStreamReader.__aiter__c � s | � � I d H }|dkrt�|S )Nr )r� �StopAsyncIteration)r8 �valr r r � __anext__� s zStreamReader.__anext__)r� )r� )rO rP rQ rW r� r9 r~ ro rD r� rd r� ri r� rj r� r� r� r� r� r� r� r r r r r � s$ [ 2)r )NN)NN)N)N)�__all__Zsocketr� r! rT �hasattr� r r r r r �logr Ztasksr r� r r r r ZProtocolr2 r r r r r r r �<module> sF � ! � ' � � DkP