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Current File : /usr/lib/python2.7/dist-packages/twisted/internet/abstract.pyc

˪Nc@sdZddlmZddlmZmZddlmZmZde	fdYZ
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efd
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Support for generic select()able objects.
i(t
implements(treflecttfailure(t
interfacestmaint_ConsumerMixincBs;eZdZdZeZeZdZdZ	dZ
RS(s
    L{IConsumer} implementations can mix this in to get C{registerProducer} and
    C{unregisterProducer} methods which take care of keeping track of a
    producer's state.

    Subclasses must provide three attributes which L{_ConsumerMixin} will read
    but not write:

      - connected: A C{bool} which is C{True} as long as the the consumer has
        someplace to send bytes (for example, a TCP connection), and then
        C{False} when it no longer does.

      - disconnecting: A C{bool} which is C{False} until something like
        L{ITransport.loseConnection} is called, indicating that the send buffer
        should be flushed and the connection lost afterwards.  Afterwards,
        C{True}.

      - disconnected: A C{bool} which is C{False} until the consumer no longer
        has a place to send bytes, then C{True}.

    Subclasses must also override the C{startWriting} method.

    @ivar producer: C{None} if no producer is registered, otherwise the
        registered producer.

    @ivar producerPaused: A flag indicating whether the producer is currently
        paused.
    @type producerPaused: C{bool} or C{int}

    @ivar streamingProducer: A flag indicating whether the producer was
        registered as a streaming (ie push) producer or not (ie a pull
        producer).  This will determine whether the consumer may ever need to
        pause and resume it, or if it can merely call C{resumeProducing} on it
        when buffer space is available.
    @ivar streamingProducer: C{bool} or C{int}

    cCstddS(s
        Override in a subclass to cause the reactor to monitor this selectable
        for write events.  This will be called once in C{unregisterProducer} if
        C{loseConnection} has previously been called, so that the connection can
        actually close.
        s!%r did not implement startWritingN(tNotImplementedError(tself((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pytstartWriting;scCsj|jdk	r+td||jfn|jrA|jn%||_||_|sf|jndS(s"
        Register to receive data from a producer.

        This sets this selectable to be a consumer for a producer.  When this
        selectable runs out of data on a write() call, it will ask the producer
        to resumeProducing(). When the FileDescriptor's internal data buffer is
        filled, it will ask the producer to pauseProducing(). If the connection
        is lost, FileDescriptor calls producer's stopProducing() method.

        If streaming is true, the producer should provide the IPushProducer
        interface. Otherwise, it is assumed that producer provides the
        IPullProducer interface. In this case, the producer won't be asked to
        pauseProducing(), but it has to be careful to write() data only when its
        resumeProducing() method is called.
        sHCannot register producer %s, because producer %s was never unregistered.N(tproducertNonetRuntimeErrortdisconnectedt
stopProducingtstreamingProducertresumeProducing(RR	t	streaming((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pytregisterProducerEs	
		cCs,d|_|jr(|jr(|jndS(sM
        Stop consuming data from a producer, without disconnecting.
        N(R
R	t	connectedt
disconnectingR(R((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pytunregisterProducerbs	N(t__name__t
__module__t__doc__R
R	tFalsetproducerPausedRRRR(((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pyRs%	
	t	_LogOwnercBs-eZdZeejdZdZRS(s
    Mixin to help implement L{interfaces.ILoggingContext} for transports which
    have a protocol, the log prefix of which should also appear in the
    transport's log prefix.
    cCs&tjj|r|jS|jjS(s
        Determine the log prefix to use for messages related to
        C{applicationObject}, which may or may not be an
        L{interfaces.ILoggingContext} provider.

        @return: A C{str} giving the log prefix to use.
        (RtILoggingContextt
providedByt	logPrefixt	__class__R(RtapplicationObject((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pyt
_getLogPrefixts
cCsdS(s
        Override this method to insert custom logging behavior.  Its
        return value will be inserted in front of every line.  It may
        be called more times than the number of output lines.
        t-((R((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pyRs(RRRRRRR R(((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pyRls
	
tFileDescriptorcBsOeZdZdZdZdZeZeZdZ	dZ
dZee
je
je
je
je
jddZdZdZdZd	Zd
ZdZdZd
ZdZdZej e!j"dZ#dZ$dZ%dZ&dZ'dZ(dZ)dddZ*dZ+dZ,dZ-dZ.dZ/RS(sAn object which can be operated on by select().

    This is an abstract superclass of all objects which may be notified when
    they are readable or writable; e.g. they have a file-descriptor that is
    valid to be passed to select(2).
    itiicCs8|sddlm}n||_g|_d|_dS(Ni(treactori(ttwisted.internetR$t_tempDataBuffert_tempDataLen(RR$((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pyt__init__s
		cCsRd|_d|_|jdk	r:|jjd|_n|j|jdS(szThe connection was lost.

        This is called when the connection on a selectable object has been
        lost.  It will be called whether the connection was closed explicitly,
        an exception occurred in an event handler, or the other end of the
        connection closed it first.

        Clean up state here, but make sure to call back up to FileDescriptor.
        iiN(RRR	R
R
tstopReadingtstopWriting(Rtreason((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pytconnectionLosts
		

cCs tdtj|jdS(s
        Write as much as possible of the given data, immediately.

        This is called to invoke the lower-level writing functionality, such
        as a socket's send() method, or a file's write(); this method
        returns an integer or an exception.  If an integer, it is the number
        of bytes written (possibly zero); if an exception, it indicates the
        connection was lost.
        s#%s does not implement writeSomeDataN(RRtqualR(Rtdata((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pyt
writeSomeDatas
cCs tdtj|jdS(s
        Called when data is available for reading.

        Subclasses must override this method. The result will be interpreted
        in the same way as a result of doWrite().
        s%s does not implement doReadN(RRR-R(R((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pytdoReadscCst|j|j|jkret|j|jdj|j|_d|_g|_d|_n|jr|jt|j|j}n|j|j}|dkst	|t
r|S|dkr|jrd}nd}|j|7_|jt|jkr|jrd|_d|_|j|j
dk	rl|jsS|jrld|_|j
jq|jr|jS|jr|j}t|_|Sn|S(sk
        Called when data can be written.

        A result that is true (which will be a negative number or an
        exception instance) indicates that the connection was lost. A false
        result implies the connection is still there; a result of 0
        indicates no write was done, and a result of None indicates that a
        write was done.
        R#iN(tlent
dataBuffertoffsett
SEND_LIMITtbuffertjoinR&R'R/t
isinstancet	ExceptionR
R*R	RRRRt_postLoseConnectiont_writeDisconnectingt_closeWriteConnectiontTruet_writeDisconnected(Rtltresult((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pytdoWrites:
(			!	"		
			
		cCstjS(sCalled after a loseConnection(), when all data has been written.

        Whatever this returns is then returned by doWrite.
        (RtCONNECTION_DONE(R((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pyR9scCsdS(N((R((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pyR;scCs|j|dS(N(R,(RR+((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pytwriteConnectionLostscCs|j|dS(N(R,(RR+((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pytreadConnectionLostscCst|trtdn|js1|jr5dS|r|jj||jt|7_|j	dk	r|jrt|j|j|j
krd|_|j	jqn|jndS(s7Reliably write some data.

        The data is buffered until the underlying file descriptor is ready
        for writing. If there is more than C{self.bufferSize} data in the
        buffer and this descriptor has a registered streaming producer, its
        C{pauseProducing()} method will be called.
        sData must not be unicodeNi(R7tunicodet	TypeErrorRR=R&tappendR'R1R	R
RR2t
bufferSizeRtpauseProducingR(RR.((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pytwrite s	cCsx,|D]$}t|trtdqqW|jsI|sI|jrMdS|jj|x#|D]}|jt|7_qdW|j	dk	r|jrt|j|j|j
krd|_|j	jqn|jdS(sReliably write a sequence of data.

        Currently, this is a convenience method roughly equivalent to::

            for chunk in iovec:
                fd.write(chunk)

        It may have a more efficient implementation at a later time or in a
        different reactor.

        As with the C{write()} method, if a buffer size limit is reached and a
        streaming producer is registered, it will be paused until the buffered
        data is written to the underlying file descriptor.
        sData must not be unicodeNi(R7RDRERR=R&textendR'R1R	R
RR2RGRRHR(Rtiovecti((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pyt
writeSequence8s

	cCsd|jr`|jr`|jr@|j|j|j|q`|j|jd|_ndS(s[Close the connection at the next available opportunity.

        Call this to cause this FileDescriptor to lose its connection.  It will
        first write any data that it has buffered.

        If there is data buffered yet to be written, this method will cause the
        transport to lose its connection as soon as it's done flushing its
        write buffer.  If you have a producer registered, the connection won't
        be closed until the producer is finished. Therefore, make sure you
        unregister your producer when it's finished, or the connection will
        never close.
        iN(RRR=R)R*R,R(Rt	_connDone((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pytloseConnectionXs	



cCst|_|jdS(N(R<R:R(R((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pytloseWriteConnectionqs	cCs|jj|dS(sStop waiting for read availability.

        Call this to remove this selectable from being notified when it is
        ready for reading.
        N(R$tremoveReader(R((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pyR)uscCs|jj|dS(sStop waiting for write availability.

        Call this to remove this selectable from being notified when it is ready
        for writing.
        N(R$tremoveWriter(R((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pyR*}scCs|jj|dS(s-Start waiting for read availability.
        N(R$t	addReader(R((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pytstartReadingscCs|jj|dS(sStart waiting for write availability.

        Call this to have this FileDescriptor be notified whenever it is ready for
        writing.
        N(R$t	addWriter(R((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pyRsicCs|j|jdS(sStop consuming data.

        This is called when a producer has lost its connection, to tell the
        consumer to go lose its connection (and break potential circular
        references).
        N(RRO(R((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pyt
stopConsumings
cCs'|jr|jst|jdS(N(RRtAssertionErrorRT(R((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pyRscCs|jdS(N(R)(R((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pyRHscCs|jdS(N(RO(R((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pyR
scCsdS(sFile Descriptor number for select().

        This method must be overridden or assigned in subclasses to
        indicate a valid file descriptor for the operating system.
        i((R((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pytfilenosiNi(0RRRRRRRR:R=R2R3R4RRt	IProducertIReadWriteDescriptort	IConsumert
ITransporttIHalfCloseableDescriptorR
R(R,R/R0R@R9R;RBRCRIRMRtFailureRRARORPR)R*RTRR	RGRVRRHR
RX(((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pyR"sF			
	:						 					
				cCs{|jd}t|dkrwxO|D]G}yt|}Wntk
rRtSX|dksk|dkr(tSq(WtStS(s5
    Determine whether the given string represents an IPv4 address.

    @type addr: C{str}
    @param addr: A string which may or may not be the decimal dotted
    representation of an IPv4 address.

    @rtype: C{bool}
    @return: C{True} if C{addr} represents an IPv4 address, C{False}
    otherwise.
    t.iii(tsplitR1tintt
ValueErrorRR<(taddrtdottedPartstoctettvalue((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pytisIPAddresss

N(Rtzope.interfaceRttwisted.pythonRRR%RRtobjectRRR"Rgt__all__(((s=/usr/lib/python2.7/dist-packages/twisted/internet/abstract.pyt<module>s[0	

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