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j � Z Gd" d � d � Z Gd# d � d � Z d 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 s6 t � j d t | � | f � | | _ | | _ d S)Nz-%d bytes read on a total of %r expected bytes)�super�__init__�len�partial�expected)�selfr r )� __class__� �4/opt/alt/python34/lib64/python3.4/asyncio/streams.pyr ! s z IncompleteReadError.__init__)�__name__�
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c s& t � j | � | | _ | | _ d S)N)r r �message�consumed)r r" r# )r r r r / s zLimitOverrunError.__init__)r r r r! r r r )r r r ( s �loop�limitc + s� | d k r t j � } n t d | d | � } t | d | �� | j � f d d � | | | � Dd H\ } } t | � | | � } | | f S)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).
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StreamReaderProtocol classes, just copy the code -- there's
really nothing special here except some convenience.)
Nr% r$ c s � S)Nr r )�protocolr r �<lambda>N s z!open_connection.<locals>.<lambda>)r �get_event_loopr r Zcreate_connectionr ) �host�portr$ r% �kwds�reader� transport�_�writerr )r& r r 5 s )c + sN � d k r t j � � n � � � f d d � } � j | | | | � Dd HS)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.
Nc s. t d � d � � } t | � d � �} | S)Nr% r$ )r r )r, r& )�client_connected_cbr% r$ r r �factoryn s z start_server.<locals>.factory)r r( Z
create_server)r0 r) r* r$ r% r+ r1 r )r0 r% r$ r r S s c + s� | d k r t j � } n t d | d | � } t | d | �� | j � f d d � | | � Dd H\ } } t | � | | � } | | f S)z@Similar to `open_connection` but works with UNIX Domain Sockets.Nr% r$ c s � S)Nr r )r& r r r' � s z&open_unix_connection.<locals>.<lambda>)r r( r r Zcreate_unix_connectionr )�pathr$ r% r+ r, r- r. r/ r )r& r r z s &c + sK � d k r t j � � n � � � f d d � } � j | | | � Dd HS)z=Similar to `start_server` but works with UNIX Domain Sockets.Nc s. t d � d � � } t | � d � �} | S)Nr% r$ )r r )r, r& )r0 r% r$ r r r1 � s z"start_unix_server.<locals>.factory)r r( Zcreate_unix_server)r0 r2 r$ r% r+ r1 r )r0 r% r$ r r
� s c @ s[ e Z d Z d Z d d d � Z d d � Z d d � Z d d
� Z e d d � � Z d S)
�FlowControlMixina) Reusable flow control logic for StreamWriter.drain().
This implements the protocol methods pause_writing(),
resume_reading() and connection_lost(). If the subclass overrides
these it must call the super methods.
StreamWriter.drain() must wait for _drain_helper() coroutine.
Nc C sF | d k r t j � | _ n | | _ d | _ d | _ d | _ d S)NF)r r( �_loop�_paused�
_drain_waiter�_connection_lost)r r$ r r r r � s zFlowControlMixin.__init__c C s/ d | _ | j j � r+ t j d | � n d S)NTz%r pauses writing)r5 r4 � get_debugr �debug)r r r r �
pause_writing� s z FlowControlMixin.pause_writingc C sl d | _ | j j � r+ t j d | � n | j } | d k rh d | _ | j � sh | j d � qh n d S)NFz%r resumes writing)r5 r4 r8 r r9 r6 �done�
set_result)r �waiterr r r �resume_writing� s z FlowControlMixin.resume_writingc C su d | _ | j s d S| j } | d k r/ d Sd | _ | j � rH d S| d k rd | j d � n
| j | � d S)NT)r7 r5 r6 r; r< �
set_exception)r �excr= r r r �connection_lost� s z FlowControlMixin.connection_lostc c sY | j r t d � � n | j s% d S| j } t j d | j � } | | _ | Dd Hd S)NzConnection lostr$ )r7 �ConnectionResetErrorr5 r6 r �Futurer4 )r r= r r r �
_drain_helper� s z FlowControlMixin._drain_helper)
r r r r! r r: r> rA r rD r r r r r3 � s r3 c sd e Z d Z d Z d d � f d d � Z d d � Z � f d d � Z d d
� Z d d � Z � S)
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 s2 t � j d | � | | _ d | _ | | _ d S)Nr$ )r r �_stream_reader�_stream_writer�_client_connected_cb)r Z
stream_readerr0 r$ )r r r r � s z StreamReaderProtocol.__init__c C s~ | j j | � | j d k rz t | | | j | j � | _ | j | j | j � } t j | � rz | j j | � qz n d S)N) rE �
set_transportrG r r4 rF r Z iscoroutineZ create_task)r r- �resr r r �connection_made� s z$StreamReaderProtocol.connection_madec s@ | d k r | j j � n | j j | � t � j | � d S)N)rE �feed_eofr? r rA )r r@ )r r r rA � s z$StreamReaderProtocol.connection_lostc C s | j j | � d S)N)rE � feed_data)r �datar r r �
data_received� s z"StreamReaderProtocol.data_receivedc C s | j j � d S)NT)rE rK )r r r r � eof_received� s
z!StreamReaderProtocol.eof_received) r r r r! r rJ rA rN rO r r )r r r � s c @ s� e Z d Z d Z d d � Z d d � Z e d d � � Z d d � Z d
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d d � Z d d � Z d d d � Z
e d d � � Z d S)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.
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s zStreamWriter.__init__c C sP | j j d | j g } | j d k r? | j d | j � n d d j | � S)Nz transport=%rz reader=%rz<%s>� )r r rP rR �append�join)r �infor r r �__repr__ s zStreamWriter.__repr__c C s | j S)N)rP )r r r r r- s zStreamWriter.transportc C s | j j | � d S)N)rP �write)r rM r r r rX s zStreamWriter.writec C s | j j | � d S)N)rP �
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| j j � S)N)rP �close)r r r r r\ + s zStreamWriter.closeNc C s | j j | | � S)N)rP �get_extra_info)r �name�defaultr r r r] . s zStreamWriter.get_extra_infoc c su | j d k r6 | j j � } | d k r6 | � q6 n | j d k r_ | j j � r_ d Vq_ n | j j � Dd Hd S)z~Flush the write buffer.
The intended use is to write
w.write(data)
yield from w.drain()
N)rR � exceptionrP Z
is_closingrQ rD )r r@ r r r �drain1 s zStreamWriter.drain)r r r r! r rW �propertyr- rX rY rZ r[ r\ r] r ra r r r r r s c @ s e Z d Z e d d d � Z d d � Z d d � Z d d � Z d
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| � S) Nr z%d bytes�eofzl=%dzw=%rze=%rzt=%rZpausedz<%s>rS ) rf rT r rg rd �_DEFAULT_LIMITrh ri rP r5 rU )r rV r r r rW _ s zStreamReader.__repr__c C s | j S)N)ri )r r r r r` q s zStreamReader.exceptionc C sJ | | _ | j } | d k rF d | _ | j � sF | j | � qF n d S)N)ri rh � cancelledr? )r r@ r= r r r r? t s zStreamReader.set_exceptionc C sA | j } | d k r= d | _ | j � s= | j d � q= n d S)z1Wakeup read*() functions waiting for data or EOF.N)rh rl r< )r r= r r r �_wakeup_waiter} s
zStreamReader._wakeup_waiterc C s
| | _ d S)N)rP )r r- r r r rH � s zStreamReader.set_transportc C s> | j r: t | j � | j k r: d | _ | j j � n d S)NF)r5 r rf rd rP �resume_reading)r r r r �_maybe_resume_transport� s ! z$StreamReader._maybe_resume_transportc C s d | _ | j � d S)NT)rg rm )r r r r rK � s zStreamReader.feed_eofc C s | j o | j S)z=Return True if the buffer is empty and 'feed_eof' was called.)rg rf )r r r r �at_eof� s zStreamReader.at_eofc C s� | s
d S| j j | � | j � | j d k r� | j r� t | j � d | j k r� y | j j � Wn t k
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pause_reading�NotImplementedError)r rM r r r rL � s
zStreamReader.feed_datac c s} | j d k r" t d | � � n | j rD d | _ | j j � n t j d | j � | _ z | j Dd HWd d | _ Xd S)zpWait until feed_data() or feed_eof() is called.
If stream was paused, automatically resume it.
NzH%s() called while another coroutine is already waiting for incoming dataFr$ )rh � RuntimeErrorr5 rP rn r rC r4 )r Z func_namer r r �_wait_for_data� s
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| j d � � WYd d } ~ Xn X| 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.
s
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c c sn t | � } | d k r' t d � � n | j d k rB | j � n d } x� t | j � } | | | k r� | j j | | � } | d k r� Pn | d | } | | j k r� t d | � � q� n | j r� t | j � } | j j � t
| d � � n | j d � Dd HqK W| | j k r/t d | � � n | j d | | � } | j d | | � =| j � t | � S) au Read chunk of data from the stream until `separator` is found.
On success, chunk and its separator will be removed from internal buffer
(i.e. consumed). Returned chunk will include separator at the end.
Configured stream limit is used to check result. Limit means maximal
length of chunk that can be returned, not counting the separator.
If EOF occurs and complete separator still not found,
IncompleteReadError(<partial data>, None) will be raised and internal
buffer becomes empty. This partial data may contain a partial separator.
If chunk cannot be read due to overlimit, LimitOverrunError will be raised
and data will be left in internal buffer, so it can be read again, in
some different way.
If stream was paused, this function will automatically resume it if
needed.
r z,Separator should be at least one-byte stringNr z2Separator is not found, and chunk exceed the limitru z2Separator is found, but chunk is longer than limit���)
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zStreamReader.readuntilr c c s� | j d k r | j � n | d k r+ d S| d k r g } x2 | j | j � Dd H} | sa Pn | j | � q@ Wd j | � S| j r� | j r� | j d � Dd Hn t | j d | � � } | j d | � =| j � | 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 immediatelly.
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 � �read)
ri r� rd rT rU rf rg rt r� ro )r �n�blocks�blockrM r r r r� @ s$
zStreamReader.readc c s� | d k r t d � � n | j d k r6 | j � n | d k rF d Sg } xr | d k r� | j | � Dd H} | s� d j | � } t | t | � | � � n | j | � | t | � 8} qO Wd j | � 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� )rc ri r� rU r r rT )r r� r� r� r r r r � readexactlyr s
zStreamReader.readexactlyc C s | S)Nr )r r r r � __aiter__� s zStreamReader.__aiter__c c s* | j � Dd H} | d k r& t � n | S)Nr� )r} ZStopAsyncIteration)r �valr r r � __anext__� s zStreamReader.__anext__r~ )r r r rk r rW r` r? rm rH ro rK rp rL r rt r} ru r� r� r
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