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coroutines)�events)�
exceptions)�format_helpers)� protocols)�logger)�sleepi )�loop�limitc � sx |du rt �� }ntjdtdd� t||d�}t||d�� |j� fdd�| |fi |��I dH \}}t|� ||�}||fS ) a� A wrapper for create_connection() returning a (reader, writer) pair.
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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).
(If you want to customize the StreamReader and/or
StreamReaderProtocol classes, just copy the code -- there's
really nothing special here except some convenience.)
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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.
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
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�r c � sv |du rt �� }ntjdtdd� t||d�}t||d�� |j� fdd�| fi |��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
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Nc C s0 |d u rt �� | _n|| _d| _d | _d| _d S �NF)r r! �_loop�_paused�
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is_closingr? r r r r� c s zStreamWriter.is_closingc � s | j �| �I d H d S r )rw rR r? r r r � wait_closedf s zStreamWriter.wait_closedNc C s | j �||�S r )r_ ri )r; �name�defaultr r r ri i s zStreamWriter.get_extra_infoc � sL | j dur | j �� }|dur |�| j�� r8td�I dH | j�� I dH dS )zyFlush the write buffer.
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w.write(data)
await w.drain()
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zStreamReader.__repr__c C s | j S r )r� r? r r r rr � s zStreamReader.exceptionc C s0 || _ | j}|d ur,d | _|�� s,|�|� d S r )r� r� rL rG rH r r r rG � s zStreamReader.set_exceptionc C s* | j }|dur&d| _ |�� s&|�d� dS )z1Wakeup read*() functions waiting for data or EOF.N)r� rL rB rC r r r �_wakeup_waiter� s
zStreamReader._wakeup_waiterc C s | j d u sJ d��|| _ d S )NzTransport already setr� )r; r* r r r rh � s zStreamReader.set_transportc C s* | j r&t| j�| jkr&d| _ | j�� d S r6 )r8 r� r� r� r_ �resume_readingr? r r r �_maybe_resume_transport� s z$StreamReader._maybe_resume_transportc C s d| _ | �� d S rF )r� r� r? r r r rm � 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 s� | j rJ d��|sd S | j�|� | �� | jd ur|| js|t| j�d| j kr|z| j�� W n t yt d | _Y n0 d| _d S )Nzfeed_data after feed_eofr T)
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�� zStreamReader.feed_datac � sl | j durt|� d���| jr&J d��| jr<d| _| j�� | j�� | _ z| j I dH W d| _ nd| _ 0 dS )zpWait until feed_data() or feed_eof() is called.
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NzF() called while another coroutine is already waiting for incoming dataz_wait_for_data after EOFF)r� � RuntimeErrorr� r8 r_ r� r7 rM )r; � func_namer r r �_wait_for_data� s
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d}~0 0 |S )a� Read chunk of data from the stream until newline (b'
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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.
If stream was paused, this function will automatically resume it if
needed.
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� t |�S ) aV Read data from the stream until ``separator`` is found.
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separator at the end.
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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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�zStreamReader.readuntilr� c � s� | j dur| 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.
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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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� |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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