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d�d d ��ZG d d � d e j�ZG d d� dee j�ZG d d� d�ZG d!d� d�Zd S )'zStream-related things.� StreamReader� StreamWriter�StreamReaderProtocol�open_connection� start_server�IncompleteReadError�LimitOverrunError� NZAF_UNIX�open_unix_connection�start_unix_server� )�
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Incomplete read error. Attributes:
- partial: read bytes string before the end of stream was reached
- expected: total number of expected bytes (or None if unknown)
c s( t � jdt|�|f � || _|| _d S )Nz-%d bytes read on a total of %r expected bytes)�super�__init__�len�partial�expected)�selfr r )� __class__� � /usr/lib64/python3.6/streams.pyr s z IncompleteReadError.__init__c C s t | �| j| jffS )N)�typer r )r r r r �
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c s t � j|� || _d S )N)r r �consumed)r �messager$ )r r r r 0 s zLimitOverrunError.__init__c C s t | �| jd | jffS )Nr )r �argsr$ )r r r r r 4 s z LimitOverrunError.__reduce__)r r r! r" r r r# r r )r r r * s )�loop�limitc + sb |dkrt j� }t||d�}t||d�� |j� fdd�| |f|�E 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.
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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).
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N)r( r' )r' c s � S )Nr r )�protocolr r �<lambda>Q s z!open_connection.<locals>.<lambda>)r �get_event_loopr r Zcreate_connectionr ) �host�portr' r( �kwds�reader� transport�_�writerr )r) r r 8 s c + s8 �dkrt j� �� ��fdd�}�j|||f|�E 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
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Nc s t ��d�} t| � �d�}|S )N)r( r' )r' )r r )r/ r) )�client_connected_cbr( r' r r �factoryq s z start_server.<locals>.factory)r r+ Z
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� Zed d � �Z dS )�FlowControlMixina) Reusable flow control logic for StreamWriter.drain().
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these it must call the super methods.
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Nc C s0 |d krt j� | _n|| _d| _d | _d| _d S )NF)r r+ �_loop�_paused�
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set_exception)r �excr@ r r r �connection_lost� s z FlowControlMixin.connection_lostc c s< | j rtd��| jsd S | j}| jj� }|| _|E d H d S )NzConnection lost)r: �ConnectionResetErrorr8 r9 r7 �
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� Zd d � Z� Z S )r a= Helper class to adapt between Protocol and StreamReader.
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call inappropriate methods of the protocol.)
Nc s* t � j|d� || _d | _|| _d| _d S )N)r' F)r r �_stream_reader�_stream_writer�_client_connected_cb� _over_ssl)r Z
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z$StreamReaderProtocol.connection_lostc C s | j j|� d S )N)rH � feed_data)r �datar r r �
data_received s z"StreamReaderProtocol.data_receivedc C s | j j� | jrdS dS )NFT)rH rP rK )r r r r � eof_received s
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adds a transport property which references the Transport
directly.
c C s || _ || _|| _|| _d S )N)�
_transport� _protocol�_readerr7 )r r0 r) r/ r' r r r r s zStreamWriter.__init__c C s: | j jd| j g}| jd k r,|jd| j � ddj|� S )Nz transport=%rz reader=%rz<%s>� )r r rU rW �append�join)r �infor r r �__repr__! s
zStreamWriter.__repr__c C s | j S )N)rU )r r r r r0 ' s zStreamWriter.transportc C s | j j|� d S )N)rU �write)r rR r r r r] + s zStreamWriter.writec C s | j j|� d S )N)rU �
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| j j� S )N)rU �close)r r r r ra 7 s zStreamWriter.closeNc C s | j j||�S )N)rU rM )r �name�defaultr r r rM : s zStreamWriter.get_extra_infoc c sN | j dk r | j j� }|dk r |�| jdk r:| jj� r:dV | jj� E dH dS )z~Flush the write buffer.
The intended use is to write
w.write(data)
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|� S ) Nr z%d bytes�eofzl=%dzw=%rze=%rzt=%rZpausedz<%s>rX ) rj rY r rk rh �_DEFAULT_LIMITrl rm rU r8 rZ )r r[ r r r r\ k s
zStreamReader.__repr__c C s | j S )N)rm )r r r r rd } s zStreamReader.exceptionc C s0 || _ | j}|d k r,d | _|j� s,|j|� d S )N)rm rl � cancelledrB )r rC r@ r r r rB � s zStreamReader.set_exceptionc C s* | j }|dk r&d| _ |j� s&|jd� dS )z1Wakeup read*() functions waiting for data or EOF.N)rl rp r? )r r@ r r r �_wakeup_waiter� s
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|| _ d S )N)rU )r r0 r r r rL � s zStreamReader.set_transportc C s* | j r&t| j�| jkr&d| _ | jj� d S )NF)r8 r rj rh rU �resume_reading)r r r r �_maybe_resume_transport� s z$StreamReader._maybe_resume_transportc C s d| _ | j� d S )NT)rk rq )r r r r rP � s zStreamReader.feed_eofc C s | j o | j S )z=Return True if the buffer is empty and 'feed_eof' was called.)rk rj )r r r r �at_eof� s zStreamReader.at_eofc C sv |sd S | j j|� | j� | jd k rr| j rrt| j �d| j krry| jj� W n tk
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zStreamReader.feed_datac c sV | j dk rtd| ��| jr,d| _| jj� | jj� | _ z| j E dH W dd| _ X dS )zpWait until feed_data() or feed_eof() is called.
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NzH%s() called while another coroutine is already waiting for incoming dataF)rl � RuntimeErrorr8 rU rr r7 rF )r Z func_namer r r �_wait_for_data� s
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|j d ��W Y dd}~X nX |S )a� Read chunk of data from the stream until newline (b'
') is found.
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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.
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needed.
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zStreamReader.readlinery c c s� t |�}|dkrtd��| jdk r(| j�d}x�t | j�}|| |kr|| jj||�}|dkr\P |d | }|| jkr|td|��| jr�t| j�}| jj � t
|d��| j d�E dH q.W || jkr�td|��| jd|| � }| jd|| �= | j � 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 stringNr z2Separator is not found, and chunk exceed the limitrz z2Separator is found, but chunk is longer than limit���)
r rg rm rj �findrh r rk �bytesr| r rx rs )r Z separatorr~ �offsetZbuflenZisep�chunkr r r rz � s:
zStreamReader.readuntilr c c s� | j dk r| j �|dkr dS |dk rZg }x&| j| j�E dH }|sBP |j|� q*W dj|�S | j rz| j rz| jd�E dH t| jd|� �}| jd|�= | j � |S )a� Read up to `n` bytes from the stream.
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bytes. If the EOF was received and the internal buffer is empty, return
an empty bytes object.
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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.
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creation.
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needed.
Nr � �read)
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zStreamReader.readc c s� |dk rt d��| jdk r | j�|dkr,dS xFt| j�|k rr| jr`t| j�}| jj� t||��| jd�E dH q.W t| j�|kr�t| j�}| jj� n t| jd|� �}| jd|�= | j � |S )a� Read exactly `n` bytes.
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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.
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needed.
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zStreamReader.readexactlyc C s | S )Nr )r r r r � __aiter__� s zStreamReader.__aiter__c c s | j � E d H }|dkrt�|S )Nr� )r� �StopAsyncIteration)r �valr r r � __anext__� s zStreamReader.__anext__c C s | S )Nr )r r r r r� � s )ry r� )r� )r r r! ro r r\ rd rB rq rL rs rP rt rQ r rx r� rz r� r� r
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