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asynchat.cpython-35.pyc
|ágÃ. ã @ sq d Z d d l Z d d l m Z Gd d „ d e j ƒ Z Gd d „ d ƒ Z Gd d „ d ƒ Z d d „ Z d S) a¥ A class supporting chat-style (command/response) protocols. This class adds support for 'chat' style protocols - where one side sends a 'command', and the other sends a response (examples would be the common internet protocols - smtp, nntp, ftp, etc..). The handle_read() method looks at the input stream for the current 'terminator' (usually '\r\n' for single-line responses, '\r\n.\r\n' for multi-line output), calling self.found_terminator() on its receipt. for example: Say you build an async nntp client using this class. At the start of the connection, you'll have self.terminator set to '\r\n', in order to process the single-line greeting. Just before issuing a 'LIST' command you'll set it to '\r\n.\r\n'. The output of the LIST command will be accumulated (using your own 'collect_incoming_data' method) up to the terminator, and then control will be returned to you - by calling your self.found_terminator() method. é N)Údequec @ s e Z d Z d Z d Z d Z d Z d Z d d d d „ Z d d „ Z d d „ Z d d „ Z d d „ Z d d „ Z d d „ Z d d „ Z d d „ Z d d „ Z d d „ Z d d „ Z d d „ Z d d! „ Z d" d# „ Z d$ d% „ Z d& d' „ Z d S)(Ú async_chatz‡This is an abstract class. You must derive from this class, and add the two methods collect_incoming_data() and found_terminator()i r zlatin-1Nc C s8 d | _ g | _ t ƒ | _ t j j | | | ƒ d S)Nó )Ú ac_in_bufferÚincomingr Ú producer_fifoÚasyncoreÚ dispatcherÚ__init__)ÚselfZsockÚmap© r ú /usr/lib/python3.5/asynchat.pyr C s zasync_chat.__init__c C s t d ƒ ‚ d S)Nz must be implemented in subclass)ÚNotImplementedError)r Údatar r r Úcollect_incoming_dataQ s z async_chat.collect_incoming_datac C s | j j | ƒ d S)N)r Úappend)r r r r r Ú_collect_incoming_dataT s z!async_chat._collect_incoming_datac C s& d j | j ƒ } | j d d … =| S)Nr )Újoinr )r Údr r r Ú _get_dataW s zasync_chat._get_datac C s t d ƒ ‚ d S)Nz must be implemented in subclass)r )r r r r Úfound_terminator\ s zasync_chat.found_terminatorc C sa t | t ƒ r- | j r- t | | j ƒ } n' t | t ƒ rT | d k rT t d ƒ ‚ | | _ d S)zdSet the input delimiter. Can be a fixed string of any length, an integer, or None. r z-the number of received bytes must be positiveN)Ú isinstanceÚstrÚ use_encodingÚbytesÚencodingÚintÚ ValueErrorÚ terminator)r Ztermr r r Úset_terminator_ s zasync_chat.set_terminatorc C s | j S)N)r )r r r r Úget_terminatorj s zasync_chat.get_terminatorc C si y | j | j ƒ } WnH t k r. d SYn3 t k r` } z | j ƒ d SWYd d } ~ Xn Xt | t ƒ r‹ | j r‹ t t | j ƒ } | j | | _ xÇ| j rdt | j ƒ } | j ƒ } | sä | j | j ƒ d | _ qž t | t ƒ rw| } | | k r1| j | j ƒ d | _ | j | | _ qa| j | j d | … ƒ | j | d … | _ d | _ | j ƒ qž t | ƒ } | j j | ƒ } | d k rî| d k rÇ| j | j d | … ƒ | j | | d … | _ | j ƒ qž t | j | ƒ } | rH| | k rD| j | j d | … ƒ | j | d … | _ Pqž | j | j ƒ d | _ qž Wd S)Nr r é éÿÿÿÿ)ZrecvÚac_in_buffer_sizeÚBlockingIOErrorÚOSErrorÚ handle_errorr r r r r r Úlenr! r r r r ÚfindÚfind_prefix_at_end)r r ZwhyZlbr ÚnZterminator_lenÚindexr r r Ú handle_readr sR zasync_chat.handle_readc C s | j ƒ d S)N)Ú initiate_send)r r r r Ú handle_writeº s zasync_chat.handle_writec C s | j ƒ d S)N)Úclose)r r r r Ú handle_close½ s zasync_chat.handle_closec C sª t | t t t f ƒ s- t d t | ƒ ƒ ‚ | j } t | ƒ | k rŒ xQ t d t | ƒ | ƒ D]$ } | j j | | | | … ƒ qa Wn | j j | ƒ | j ƒ d S)Nz#data argument must be byte-ish (%r)r ) r r Ú bytearrayÚ memoryviewÚ TypeErrorÚtypeÚac_out_buffer_sizer( Úranger r r. )r r ZsabsÚir r r ÚpushÀ s %zasync_chat.pushc C s | j j | ƒ | j ƒ d S)N)r r r. )r Zproducerr r r Úpush_with_producerÌ s z async_chat.push_with_producerc C s d S)z4predicate for inclusion in the readable for select()r" r )r r r r ÚreadableÐ s zasync_chat.readablec C s | j p | j S)z4predicate for inclusion in the writable for select())r Ú connected)r r r r ÚwritableØ s zasync_chat.writablec C s | j j d ƒ d S)zAautomatically close this channel once the outgoing queue is emptyN)r r )r r r r Úclose_when_doneÜ s zasync_chat.close_when_donec C sg x`| j rb| j rb| j d } | sL | j d =| d k rL | j ƒ d S| j } y | d | … } WnD t k r¯ | j ƒ } | rž | j j | ƒ n | j d =w Yn Xt | t ƒ rÚ | j rÚ t | | j ƒ } y | j | ƒ } Wn t k r| j ƒ d SYn X| r^| t | ƒ k s:| t | ƒ k rT| | d … | j d <n | j d =d SWd S)Nr )r r< r1 r6 r4 ÚmoreÚ appendleftr r r r r Úsendr& r' r( )r ÚfirstZobsr Znum_sentr r r r. à s8 $ zasync_chat.initiate_sendc C s* d | _ | j d d … =| j j ƒ d S)Nr )r r r Úclear)r r r r Údiscard_buffers s zasync_chat.discard_buffers)Ú__name__Ú __module__Ú __qualname__Ú__doc__r$ r6 r r r r r r r r r! r- r/ r1 r9 r: r; r= r> r. rD r r r r r 4 s, H (r c @ s+ e Z d Z d d d „ Z d d „ Z d S)Úsimple_produceri c C s | | _ | | _ d S)N)r Ú buffer_size)r r rJ r r r r s zsimple_producer.__init__c C se t | j ƒ | j k rK | j d | j … } | j | j d … | _ | S| j } d | _ | Sd S)Nr )r( r rJ )r Úresultr r r r? s zsimple_producer.moreN)rE rF rG r r? r r r r rI s rI c @ s[ e Z d Z d d d „ Z d d „ Z d d „ Z d d „ Z d d „ Z d d „ Z d S)ÚfifoNc C sJ d d l } | j d t d d ƒ| s7 t ƒ | _ n t | ƒ | _ d S)Nr z(fifo class will be removed in Python 3.6Ú stacklevelé )ÚwarningsÚwarnÚDeprecationWarningr Úlist)r rR rO r r r r ! s z fifo.__init__c C s t | j ƒ S)N)r( rR )r r r r Ú__len__* s z fifo.__len__c C s | j S)N)rR )r r r r Úis_empty- s z fifo.is_emptyc C s | j d S)Nr )rR )r r r r rB 0 s z fifo.firstc C s | j j | ƒ d S)N)rR r )r r r r r r9 3 s z fifo.pushc C s$ | j r d | j j ƒ f Sd Sd S)Nr" r )r N)rR Úpopleft)r r r r Úpop6 s zfifo.pop) rE rF rG r rS rT rB r9 rV r r r r rL s rL c C sE t | ƒ d } x. | r@ | j | d | … ƒ r@ | d 8} q W| S)Nr" )r( Úendswith)ZhaystackZneedleÚlr r r r* L s #r* ) rH r Ú collectionsr r r rI rL r* r r r r Ú<module>/ s Û,