a DOg h@s&dZddlZddlZddlZddlZeedr6ed7ZddlmZddlmZddlm Z dd lm Z dd lm Z dd l m Z dd lmZd ZddedddZd dedddZeedrd!dedddZd"dedddZGddde jZGdddee jZGdddZGdddZdS)#) StreamReader StreamWriterStreamReaderProtocolopen_connection start_serverNZAF_UNIX)open_unix_connectionstart_unix_server) coroutines)events) exceptions)format_helpers) protocols)logger)sleepi)looplimitc sx|durt}ntjdtddt||d}t||d|jfdd||fi|IdH\}}t|||}||fS) aA 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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Nrrrcstd}t|d}|SNrrrrr'rclient_connected_cbrrrrfactoryXs  zstart_server..factory)r r r!r"r#Z create_server)r/r$r%rrr&r0rr.rr:s rcsv|durt}ntjdtddt||d}t||d|jfdd|fi|IdH\}}t|||}||fS) z@Similar to `open_connection` but works with UNIX Domain Sockets.NrrrrrcsSrrrrrrrprz&open_unix_connection..) r r r!r"r#rrZcreate_unix_connectionr)pathrrr&r'r(r)r*rrrrds    rcsLdurtntjdtddfdd}j||fi|IdHS)z=Similar to `start_server` but works with UNIX Domain Sockets.Nrrrcstd}t|d}|Sr+r,r-r.rrr0~s  z"start_unix_server..factory)r r r!r"r#Zcreate_unix_server)r/r1rrr&r0rr.rrts rc@sBeZdZdZdddZddZddZd d Zd d Zd dZ 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. NcCs0|durt|_n||_d|_d|_d|_dSNF)r r _loop_paused _drain_waiter_connection_lost)selfrrrr__init__s  zFlowControlMixin.__init__cCs d|_|jrtd|dS)NTz%r pauses writing)r5r4 get_debugrdebugr8rrr pause_writings zFlowControlMixin.pause_writingcCsFd|_|jrtd||j}|durBd|_|sB|ddS)NFz%r resumes writing)r5r4r:rr;r6done set_resultr8waiterrrrresume_writings  zFlowControlMixin.resume_writingcCsVd|_|jsdS|j}|dur"dSd|_|r4dS|durH|dn ||dSNT)r7r5r6r>r? set_exceptionr8excrArrrconnection_losts z FlowControlMixin.connection_lostcs<|jrtd|jsdS|j}|j}||_|IdHdS)NzConnection lost)r7ConnectionResetErrorr5r6r4 create_futurer@rrr _drain_helpers zFlowControlMixin._drain_helpercCstdSr)NotImplementedErrorr8streamrrr_get_close_waitersz"FlowControlMixin._get_close_waiter)N) __name__ __module__ __qualname____doc__r9r=rBrGrJrNrrrrr2s   r2csfeZdZdZdZdfdd ZeddZddZfd d Z d d Z d dZ ddZ ddZ ZS)ra=Helper class to adapt between Protocol and StreamReader. 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Ncsntj|d|dur,t||_|j|_nd|_|dur@||_d|_d|_d|_ ||_ d|_ |j |_dS)NrF)superr9weakrefref_stream_reader_wr_source_traceback_strong_reader_reject_connection_stream_writer _transport_client_connected_cb _over_sslr4rI_closed)r8Z stream_readerr/r __class__rrr9s  zStreamReaderProtocol.__init__cCs|jdurdS|Sr)rVr<rrr_stream_readers z#StreamReaderProtocol._stream_readercCs|jr6ddi}|jr|j|d<|j||dS||_|j}|durT|||ddu|_ |j durt ||||j|_ | ||j }t |r|j|d|_dS)NmessagezpAn open stream was garbage collected prior to establishing network connection; call "stream.close()" explicitly.Zsource_tracebackZ sslcontext)rYrWr4Zcall_exception_handlerabortr[ra set_transportget_extra_infor]r\rrZr Z iscoroutineZ create_taskrX)r8r(contextr'resrrrconnection_mades0      z$StreamReaderProtocol.connection_madecsx|j}|dur*|dur |n |||jsV|durJ|jdn |j|t|d|_d|_ d|_ dSr) rafeed_eofrDr^r>r?rSrGrVrZr[)r8rFr'r_rrrG s     z$StreamReaderProtocol.connection_lostcCs|j}|dur||dSr)ra feed_data)r8datar'rrr data_receivedsz"StreamReaderProtocol.data_receivedcCs$|j}|dur||jr dSdS)NFT)rarir])r8r'rrr eof_received s z!StreamReaderProtocol.eof_receivedcCs|jSr)r^rLrrrrN+sz&StreamReaderProtocol._get_close_waitercCs"|j}|r|s|dSr)r^r> cancelled exception)r8closedrrr__del__.szStreamReaderProtocol.__del__)NN)rOrPrQrRrWr9propertyrarhrGrlrmrNrq __classcell__rrr_rrs   rc@sveZdZdZddZddZeddZdd Zd d Z d d Z ddZ ddZ ddZ ddZdddZddZdS)ra'Wraps a Transport. 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The intended use is to write w.write(data) await w.drain() Nr)ruror[rrrtrJ)r8rFrrrdrainls   zStreamWriter.drain)N)rOrPrQrRr9r~rrr(rrrrrrrrerrrrrr6s    rc@seZdZdZedfddZddZddZdd Zd d Z d d Z ddZ ddZ ddZ ddZddZddZd&ddZd'ddZd d!Zd"d#Zd$d%ZdS)(rNcCsv|dkrtd||_|dur*t|_n||_t|_d|_d|_d|_ d|_ d|_ |j rrt td|_dS)NrzLimit cannot be <= 0Fr ) ValueError_limitr r r4 bytearray_buffer_eof_waiter _exceptionr[r5r:r extract_stacksys _getframerW)r8rrrrrr9s   zStreamReader.__init__cCsdg}|jr"|t|jd|jr2|d|jtkrN|d|j|jrf|d|j|jr~|d|j|jr|d|j|j r|dd d |S) Nrz byteseofzlimit=zwaiter=z exception=rvZpausedrwrx) rrylenrr_DEFAULT_LIMITrrr[r5rzr{r|rrrr~s    zStreamReader.__repr__cCs|jSr)rr<rrrroszStreamReader.exceptioncCs0||_|j}|dur,d|_|s,||dSr)rrrnrDrErrrrDs zStreamReader.set_exceptioncCs*|j}|dur&d|_|s&|ddS)z1Wakeup read*() functions waiting for data or EOF.N)rrnr?r@rrr_wakeup_waiters zStreamReader._wakeup_waitercCs ||_dSrr)r8r(rrrrdszStreamReader.set_transportcCs*|jr&t|j|jkr&d|_|jdSr3)r5rrrr[resume_readingr<rrr_maybe_resume_transportsz$StreamReader._maybe_resume_transportcCsd|_|dSrC)rrr<rrrriszStreamReader.feed_eofcCs|jo |j S)z=Return True if the buffer is empty and 'feed_eof' was called.)rrr<rrrat_eofszStreamReader.at_eofcCsr|sdS|j|||jdurn|jsnt|jd|jkrnz|jWntyfd|_Yn0d|_dS)NrT) rextendrr[r5rrZ pause_readingrKrrrrrjs    zStreamReader.feed_datacs^|jdurt|d|jr.d|_|j|j|_z|jIdHWd|_nd|_0dS)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 RuntimeErrorr5r[rr4rI)r8Z func_namerrr_wait_for_datas   zStreamReader._wait_for_datac sd}t|}z||IdH}WntjyL}z|jWYd}~Sd}~0tjy}zP|j||jr|jd|j|=n |j | t |j dWYd}~n d}~00|S)aRead 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 IncompleteReadErrorpartialLimitOverrunErrorr startswithconsumedclearrrargs)r8sepseplenlineerrrreadline s $zStreamReader.readlinercst|}|dkrtd|jdur(|jd}t|j}|||kr||j||}|dkrZq|d|}||jkr|td||jrt |j}|j t |d| dIdHq,||jkrtd||jd||}|jd||=| t |S) aVRead 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. rz,Separator should be at least one-byte stringNr z2Separator is not found, and chunk exceed the limitrz2Separator is found, but chunk is longer than limit)rrrrfindrr rrbytesrrrr)r8Z separatorroffsetZbuflenZisepchunkrrrr(s<         zStreamReader.readuntilrcs|jdur|j|dkrdS|dkrVg}||jIdH}|s@qL||q(d|S|jsr|jsr|dIdHt|jd|}|jd|=| |S)aRead 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. 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If stream was paused, this function will automatically resume it if needed. rz*readexactly size can not be less than zeroNr readexactly) rrrrrrrr rrr)r8rZ incompleterkrrrrs&       zStreamReader.readexactlycCs|Srrr<rrr __aiter__szStreamReader.__aiter__cs|IdH}|dkrt|S)Nr)rStopAsyncIteration)r8valrrr __anext__szStreamReader.__anext__)r)r)rOrPrQrWrr9r~rorDrrdrrirrjrrrrrrrrrrrrs$  [ 2)r)NN)NN)N)N)__all__Zsocketrr!rThasattrr r r r rlogrZtasksrrrrrrProtocolr2rrrrrrrs>         ! '   DkP