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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:
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- expected: total number of expected bytes (or None if unknown)
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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.
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with various optional keyword arguments following.
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instance to use) and limit (to set the buffer limit passed to the
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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.
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parameter can either be a plain callback function or a coroutine;
if it is a coroutine, it will be automatically converted into a
Task.
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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().
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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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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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|| _ 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.
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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.
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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.
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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.
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creation.
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needed.
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