ž «ÿfD-c@s}dZddlZddlZddlmZGdd„dejƒZGdd„dƒZGdd „d ƒZd d „Z dS( u¥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. iN(udequecBs|EeZdZdZdZdZdZdZd'd'dd„Z dd„Z d d „Z d d „Z d d„Z dd„Zdd„Zdd„Zdd„Zdd„Zdd„Zdd„Zdd„Zdd „Zd!d"„Zd#d$„Zd%d&„Zd'S((u async_chatu‡This is an abstract class. You must derive from this class, and add the two methods collect_incoming_data() and found_terminator()iiulatin-1cCs8d|_g|_tƒ|_tjj|||ƒdS(Ns(u ac_in_bufferuincomingudequeu producer_fifouasyncoreu dispatcheru__init__(uselfusockumap((u-/opt/alt/python33/lib64/python3.3/asynchat.pyu__init__Ds   uasync_chat.__init__cCstdƒ‚dS(Numust be implemented in subclass(uNotImplementedError(uselfudata((u-/opt/alt/python33/lib64/python3.3/asynchat.pyucollect_incoming_dataRsu async_chat.collect_incoming_datacCs|jj|ƒdS(N(uincominguappend(uselfudata((u-/opt/alt/python33/lib64/python3.3/asynchat.pyu_collect_incoming_dataUsu!async_chat._collect_incoming_datacCs&dj|jƒ}|jdd…=|S(Ns(ujoinuincoming(uselfud((u-/opt/alt/python33/lib64/python3.3/asynchat.pyu _get_dataXsuasync_chat._get_datacCstdƒ‚dS(Numust be implemented in subclass(uNotImplementedError(uself((u-/opt/alt/python33/lib64/python3.3/asynchat.pyufound_terminator]suasync_chat.found_terminatorcCs:t|tƒr-|jr-t||jƒ}n||_dS(uRSet the input delimiter. Can be a fixed string of any length, an integer, or NoneN(u isinstanceustru use_encodingubytesuencodingu terminator(uselfuterm((u-/opt/alt/python33/lib64/python3.3/asynchat.pyuset_terminator`suasync_chat.set_terminatorcCs|jS(N(u terminator(uself((u-/opt/alt/python33/lib64/python3.3/asynchat.pyuget_terminatorfsuasync_chat.get_terminatorcCs`y|j|jƒ}Wn6tjk rN}z|jƒdSWYdd}~XnXt|tƒr||jr|tt|j ƒ}n|j ||_ xÍ|j r[t |j ƒ}|j ƒ}|sÕ|j |j ƒd|_ qt|tƒrh|}||kr"|j |j ƒd|_ |j||_qX|j |j d|…ƒ|j |d…|_ d|_|jƒqt |ƒ}|j j|ƒ}|dkrâ|dkr»|j |j d|…ƒn|j ||d…|_ |jƒqt|j |ƒ}|r?||kr;|j |j d| …ƒ|j | d…|_ nPq|j |j ƒd|_ qWdS(Nsiiiÿÿÿÿ(urecvuac_in_buffer_sizeusocketuerroru handle_erroru isinstanceustru use_encodingubytesuencodingu ac_in_bufferulenuget_terminatorucollect_incoming_datauintu terminatorufound_terminatorufindufind_prefix_at_end(uselfudatauwhyulbu terminatorunuterminator_lenuindex((u-/opt/alt/python33/lib64/python3.3/asynchat.pyu handle_readnsN            uasync_chat.handle_readcCs|jƒdS(N(u initiate_send(uself((u-/opt/alt/python33/lib64/python3.3/asynchat.pyu handle_write²suasync_chat.handle_writecCs|jƒdS(N(uclose(uself((u-/opt/alt/python33/lib64/python3.3/asynchat.pyu handle_closeµsuasync_chat.handle_closecCs}|j}t|ƒ|kr_xQtdt|ƒ|ƒD]$}|jj||||…ƒq4Wn|jj|ƒ|jƒdS(Ni(uac_out_buffer_sizeulenurangeu producer_fifouappendu initiate_send(uselfudatausabsui((u-/opt/alt/python33/lib64/python3.3/asynchat.pyupush¸s  %uasync_chat.pushcCs|jj|ƒ|jƒdS(N(u producer_fifouappendu initiate_send(uselfuproducer((u-/opt/alt/python33/lib64/python3.3/asynchat.pyupush_with_producerÁsuasync_chat.push_with_producercCsdS(u4predicate for inclusion in the readable for select()i((uself((u-/opt/alt/python33/lib64/python3.3/asynchat.pyureadableÅsuasync_chat.readablecCs|jp|j S(u4predicate for inclusion in the writable for select()(u producer_fifou connected(uself((u-/opt/alt/python33/lib64/python3.3/asynchat.pyuwritableÍsuasync_chat.writablecCs|jjdƒdS(uAautomatically close this channel once the outgoing queue is emptyN(u producer_fifouappenduNone(uself((u-/opt/alt/python33/lib64/python3.3/asynchat.pyuclose_when_doneÑsuasync_chat.close_when_donecCssxl|jrn|jrn|jd}|sO|jd=|dkrO|jƒdSn|j}y|d|…}WnDtk r²|jƒ}|r¡|jj|ƒn |jd=wYnXt|t ƒrà|j ràt ||j ƒ}ny|j |ƒ}Wn#tjk r|jƒdSYnX|rj|t|ƒksC|t|ƒkr]||d…|jd/s  Ð(