ÿØÿà JFIF    ÿÛ „ !.%+&8&+/1555$;@;4?.451 4,$,44444444444414444444444444444444444444444444444444ÿÀ  á á" ÿÄ     ÿÄ ?    !1AQaq"2‘¡±ÁðBRbrÑá#‚’¢²3S CñÿÄ   ÿÄ !    !1QAa‘2ÿÚ   ? 5˜Z¯V¦cø)›t/? z¨±>Õ5€¶‹Á¤·¼z¼Ü¬+ñ®v¤¨_ˆR­BFn©—˜ý®ç̝P8gýt·ÉSTŦˆìät?þé¼íìN/Þa)ì–í6ô… Ï¿øÃj´¿KÇü]ÿ ªô¹-eKànëÕHTx}ýSÜ›ÿ ”7Ø×&µ<¦  ¥ÑO¶[Ù¯ä¨ÞÃÿ PZ-¬;#õ|•oaÿ ©CìÞz3˜öː/¤­ñTûIØ}š^ mÓ%ªxˆ¥ÉŸu=Z+ISe¿45™¼u;ú&WØ÷€æßQ™®{|íx*TC“#ZŠìZ§²‹ 6pv…³¿¡äª*áZÐ%ÒOáˆo"x«OHk w±æ+¬V(kMúŸ5Vö«$ ÁrÏbàb57/luR ¸ÑÛj Òµì`Ðœq­û žICÀÊ•©4€Âcà¨Ï€O´<èÐ:›ù(Ë^L8þ‘ÍÌ#¸Ð_Ì©ÙK(Öz 4¬û+¸;ü’V’84‘¬ÃŽ:[â‡ÔÌáõp¢~§ªlæ£ö{®G>J¼"°‡7¯ÆÉèßû ‹É‹§ÁòÃýâßî ^ƾÙõ‹×óH#«LP½ïX=xÑÍ$|W?•~• îëÔ©ª‹ {ÝT…Kÿ ”hûâá)J*ö˜–ÔU;iÇ€/ ÆþjóZ\ýwØ=Ìm ºèËL9 ýèÆð/¨’¥öo=nË.%Îì ŽÕ¯È|{Oj²ƒE6e/ßdÄõ²Ìâ1O®ò×TsəԸhOMýíMˆ¿¼H˜l²,7Â¥#MF/Úf°Ö½± ¸–dr‹NýÊ íjqx{œÉ ä-È ¦ øÄër¨q°ð †nцýÑÄÆ’mä…n<0È™;ÁÝá¯ÁZƒ7FÀmì­ É&9ˆîéi¶ùN§Y• ÃZãAâ?•‡©‰ , ó¾IŸŠc1 4â&y­&pŠ­6;M À 0¹qç»p.á …ŸÅáK@%6·y6ƒ‰3?”úºŽ‰éX5ªPT §µ!=Mž«Ú½‹ÅgÂSâÉaþÓoö–¯ÁÔìR>5éÿ üs¶ÆUcÌ kÇR ]ÿ ù¬¼«VŽ;Â|‡~¢¦”ÏÅ°æ {L™Õ°Óv¹ò¸írŽ¡×¢CÃ!íVÕ {¶»sŒNPg/ "uÕbkm²“$ďå¿é¹§°½æz¯6 †s¿!s–wÚÝ“™Œ °.ûj>·+™Òa…©Œ&rÝÎtÛë긪Ît’LAVp%c Úý[ÄzJ¾ÇàXXç@˜ó<êL]·T˜¾¥1Ó©V‡g´æ½¦Ý@¹óø!_@´ÞâSÁ —S3™•& ]@JHÚý©ZŽ €×æÔr»Áf!‡yÞ4Mv*èÓã_{‘åóUuљØ«Oïé*®EvÑ Œ÷‡U \"㪒ÍK+À 4“M¡ï:0¥5í!'<@î´”>Ç»&Z–ïCCV˜Ì5Šo&îhè.žû |ÓK©h$s6KìŒëã)¹hI¦GïOåóI;ììü#É$Š0…Ææ¥TØ.5­¾gn´ “ÂÖ\:hœ89G)J@„}œ:’Ò{/Š"¦_Æ×7Æ3VÇŠÊa]ÚŒÙ€Ä–=®uÁßâACZƒ§§£ Qnâ:«,×{tyø¬iÛcœÜÄ€H½ÄÍCk´÷šß .W'b¤Íåh]÷€=,Žv×cÚEÚHXJX¶îo¨FÒtèöŸ>ªª6[J®Fµ£sGÁeqõfe\íjÒÐïÄÐGˆe1Ø‹.Ø”‘Ëuø Y­ˆÜ ŽG|zùªüMpDnQWÄ”%JŠ™)â*p@Örš«ÕT2Ð%ˆG#ª„ ·¤!°ŸOTÂT¸aÚ%4&h™LµšØüÐ.F¿²ÐÞ_Ç‚¾ÅÃaÜ÷09Æ q€öy˜v‡85õN÷]¬äѼóS{°_MŽ¬úÔ#°Ç¸0åÞè2ëôPcvÆw9®ií1Ä8F™˜à‰´+‰Ik1òÝ7“Ñ×ÒsÝ\x‚h`ÞÑ`ó"|µEcý£n˜h`}GÞ !±ù²Ápü²ß6 0ïi󜵩SÈÇ7˜-ÕURO˜¦´f$ªž-Í6(œ}<„ éc øs]ŽŽ„*—¾ ìdŽ„)méª\¿êÎIg¾ØÞ~I#C/¼¼´EÁÈŽi8“©õådô·>euä ƒ'Ê×लR1ÉJE1ÐAát`t;ÇР%Ý<‡¥„ÍÆ`×Oyó)õiI€ñQaŸ4Ûù\áàaÃÔ¹HÃu¹*k€¦<„e S‡&õÏ B!ŽhüÞ`yj}mªf×\¿ Ç~æ­9‡û\՞Ǖg²1Žû5V7 !àöšm° c`ܬøÇìµÒ'P"?…´Ö,"§^•õŽ¨sÔ)6˜sæéÍR¼ ò|Sl”‹7 nPW Gòú÷½§O¯‡„l¡kSÞŒr½PÊ@æ¢pŽ-mÿ #Ÿ˜Àº¶Áä¦;ïÔæ$1££`“Õ>„—·ž)ßð³ñ#Ï Ô$¶œ‰ÊE‹À;÷º ¯«P:Ñ”8–IÊtpÞ3ª“>ê“þës4ò2OÏÕ­±zô†Õ§‰.÷ä¸;¿˜“'œ›žª}«Œ{ª±Ì 9ÔóÞÕ‡0 $íWV3Üì¬ —@kÝ4@¿r¼±½¬™›?øØæ´'Áé®CË3-g$˜ö‡×auÚi´Žp/êÛ æF›Ú2v‹ã¿¿,nB1̨ƃqÞa5͝@&Æû“él÷ \C²½UÍc ¯k×¢U ÖéQå™—-r wô ÞÏ<Ò=&=ÿ Ôê Òêˈt,i—;LîÜ á¸*ÚÃ1$êL•LÍ <É)ýÐà’ ;F™{ƒ™˜€&'}‚ãÄK`¡ÞT@I;®žZóè‚s’7®°›+§O­Åq©é»²9<Ô J ¼9O’HL»Ùïì¸rk¼Ž_ý‘TŸu[²ßÚŒ·ü÷B%¯E ŸÔX5êO´ Ç•€’I0 ÉJX` ñ¹õ%;µŸD‘«´€àwÒ™U ûئžÖö\×®×´8 ½‡ºÐÆÓ§?Àkmœ=;d5*@-ì0F Rªýš[Ü6âö̃ڸr*KA9· u*µæ£?U¸Âêí†8@¦X4 e-ò„0s{ HâUpU?¼mñRa°®a%Ð'tÉ×’\¾ÊÉ]t›h>·(Ë@R¼¡Ãt h}’O÷au<+nT…Ö…MӐ??Óe95 q>í/;&JSû °¯ÊéÞ øƒ*Ã2½Ài&:nôUl=¾¿5eˆ3”ñc|Ú2V”>„»&eE;«ÚäC p¢Û úy 9š[ŒÌx¼擼A&DåÒ¯ˆ¤ÀÌ;"˜ ÏQä¸åhÊ}Ûq«Û0WžÒ|»€ø®öCm5•\ÇÀ§Pe3£]0ÃàLDÉ‰1øªxjgwT‚÷¿LΨK‹›ùs—xˆÜ±µ kæ¸f‰‰ÜGk/LÛØ6d9ò¶ùA{ƒA3š/¬D¬khÓk‰`˜"㯒r¿±Óã jx‡°e}<Ñø\3y:'À•/h½Í€Ç4~g ?Û(¼]v‘ªlKÎâ~?O‚W%{Ì:“'©úNq¾›úo(X’¥¯ˆ nFê{Ç€ü?º'ë ø‹ì Þ09ŒÌç9Æ —ËC`j@ÓÄ(+a‹un¸#ÂꟋ{K`‘ÑÍÍ'à´»/Û,KW;Þ4²þð ï Nm|~fGÏ(…³Ã)«1ö­Õ ¥‡¨©ƒÃ™ü-s=à=U66Ï«Ýc蓦W¹íž®›nÔ%êÇìŒ<#Ü×84ån®Ð ÒåOC` ñânÑs‡¢ç 1õ%Îhì½Ã½® e:ݼUZo™`  ÅZŸŒÊ«ê1ÏÄo$q¹Þ€©ˆhÐÉä¯ñ[!…Ú˜àJ:x2$Íß&PåT£6ç— ‡Í*4Ýšçjÿ ‰É nófÐ ó(L5C•åÆ\rMÒ@ò }y-W}™üýVù—ú¢=Ù”c®‘< M ž ´Phr ¦©TD ‘ù.$´÷O‡‘V2Æò.=IUŒ=ž‡â¬i™aþÓåÙ?òUø'ØÖ•.~* šTŒ!•-×áºTâ®ä#õü'´ eýlYÅÓeÕKÂrT"CÚ@u!Óxƒ{š3€}1¿(r}%«nËamjÑ%ÑNEò v ˜à  σöK³,*º.àzù¨™Ó ÚçâU¦*¿ 9{%Ö¹ njûdaXöb) kÛƱûÓ\°M7ˆÂ=û›ç¿Ã‚­V»Cg–8ÙêE- j)k$º`Ã-ùEýeBÆÇ]c¡°ñty&Òd0nõ'¡W+ƒ*|–øµFa\GQªEAÔp5\Ǽ·¼Ç8·õ -â§Ú[ ‡ uZeÖ 3}×d'+¹:ð+K†Û®s!Ï$úe€<Û”x)1»a­¡LC]¸µík…ÚàA»AYº{†ªS[¦5HÒ7ù --,ísòDØ€èk ÞÀîÜ ò@â( ËNˆë›4ô½•/¦o‡€Û7 ê•ÆêòðÜy'Án½µ á˜ݦ ndeo…[ì¶Ê,¥R³Ä=À±—–ß;£™´ñSâ*g§”ïaið‘Jå~™ÓÞ ß³Õ¢»8x埒²52>AÊb&-÷\7´éÄù€T˜,w;3{ï˜k…à¹ÄqÀ«œ{€\ ˆ¾[´¨јr &Úé„Ívˆ±8†¿]|¬ņ4I×pÞS1ÈÖz‰#Ìv‡G!YNògñ:màTz¢Ý1ô©^O=~ë|5Bã™ç•¼µõ•bÆ@úÕS¬ÈŒ#¬zünrŸ û” Z²•ï›èðV"ÁHÚý©wÝ €7¼Ìu1hÑa3Éä û f$o¿É ™Ú›ÝçnpÒ3äÌ3†Í§,Äï]$‰/pê †«À¼¸e9­Æê_C]žƒ·ý·frÁN«, E=›Çq -‰öŒ:aÏ¿±í&£Í:-} 84‘ÿ eƒQÑeëSsuiA ³g㟥ú£?ÿ ʼn*”“÷aühe:ÊWa@ÒÞk±eØ] F Ô—r.åä˜ @ö¥ªZoÐýYL·¥S²G/‡ñ <~*ZÆ´è>JlòàÛƽÿ 窘ìGN¢:I®KšJp/`íIÁÀõ#Ä-€ö­šµŒoF4|ÆQØÆ@Ì|£Ô…¢À{9˜è½Üó›€ôYÒÎYsið;ís¤€à²ˆ‚4qÉVŒI$ ‰"° æµ8cXGjœˏ¡Aâý•ËÜ¢ûï e·çLx']á"oÅÎê3¯Ç—¹”ó0nå‚âg{Œñ> S´˜îè°g238‚ãköÝfÚd´6Ò€;ò÷±¢™¼›º ¢Æ'¥Ðx'e¬ç ]bÈÆV¢ó‹kýBO ðÊâ$Ÿ!×T 3Mýמ žìٍàÌü‘8÷€àæØ8æ©6‰©L´«…oãpð„~Çk‰!ñ;‹”ÛžÍ àž±z Ÿôû øŸÝužÏ;ÿ #|u6™Þ¬ÚˆÐõA4¶â|ôl|Ê2ŽÇ¤ÝÅÇY.<#Aí.k§hóF‚”Y; M½Ö4hŸ4&›­¿tès´%FìL¥£Ãk‰ÇT¤haÁ¤ÚxfÉ`ÑìË›>i 3t‚:,–+^÷´–{Û–Nxi"x‘Ûg î¨>¥Õ܁ùZH,2Û“:8xÊ¢Çí9.É-Ìâã-=çjwµS˜dütžçwýGòú®®ûº_ˆýx$–¡ãøO EÚÛÏ÷R„×w+3£Á£öUMyR²¹âŒ°š›¸Ñãò9§Ó_Dl+Ùßc›úšGÅÌc†Ž!Ko=¶.‘Îÿ c²(2®V mª.ÿ ¹B›¹å ù„öŸSV>™ü¯$y:G¢Z×àøúdî¹û­·ýÇ´:•c LÍõi_‹ö+ÎæGÊè>OŠ•äž´§Þ{X}¨1ÚTc›»Qþ•êô°t¿OP?eæ~É{5]•ÙR£r5†nZ\ã@ &îJõ ¾àC°þV>fé¥/ü5ñÊIº_é5 ;e­h<@ Ä&æÃëE%;X,ÒãÆÞ`Oò¦kŸm#˜!ÀyÄ¢| óLšò¥Ä` ¶R=|ÈCâh5ò3DˆïF†ðÒ#ÅìÛœ?¸yhBãœí ZxßÎÄhºRK„`Þödvײ™ÀÈÑÒgŒuY w³%†ƒÓzõ ÖÏp‚dH®¦A´ù§»ÓÇMæ~)ˆð‡û:ù&Ä •vGD´À n ݇¼Ö8Fö óáà£~Ë¥x`oK|Ä?fxiØü%pìR>éò+Û±éÎ>núlFŤ'tq8LZÏvÃ?„¡ß±È⽆¯³íü@x|PöUäèØã¡ð‚ŒAìÏ"vÍwóŸÍ{ ý0.z È•Ö{,N¡£¡ŸKÕÙž>Ýœþ ÍÀ°<×EA!Å‚D™IúOÍ¡>ôG}Â` ÍßkÜL™Ž Þð™ {IøF²¹òQ3&!ÃÂÞz.d&Ï-sH¸,Ôõ˜ŽP€ 77ˆÝ¼ÊëÜw =cÕ Ú,ØÐ5ÎYÐ)ì´öœgŒ[¤ßv㙑8心>h]§µháYš£²ºÑ.{Ï7Sð•?´~×SÃKýJÛ˜ ™Íäiúu<µX¶1õ^kâçIÑ£sZ4h>j*ÔšD:4­¿_ ÷¸ Õxæÿ ¸?Mù _•­ÊÐ ä ÷ý ÑwL œ­ïnTkÛUÍN©ë:¦fV ¶ÜÔÜMªÅâA½–¿R×TXš-%iTÊT•‡Ù‚JôϐZxWÑè‰f‰òG º ×Õû2aZ7OU3[“×AT–ÞŒ…-‘¤”Ì ì&(ˆ¿­•ƒkï’:ðY¦W‘ Å)“†‘˜³Åtcø˜ñTÂwÚÇ4|üLÇªí–v- qˆèU qPE.†â‘˜µ Æ,ÐÅs]8¾„oúÑ i>ÜxxÈó)ƒ ´æÁâØ$À‰vžŸf$Ž |ãw;ÀÁIJ»b` {¦Ó¤Ú$©YÀ‘n@Óïž«9J¼êG m¤ ܯ¹ÌW4€ÐÒÅÛ‡#褕Ÿn-?í|с¥÷Ú¹¬'´ÞÜ9ÓK `hê£SÄSà?7—Wí_´…óB›»:=Ãïq`<8ñÓŒÑlú2d¬ê³£hÖ[l|$vÝro~'R®‰§°ñmY ͧäP |PUª¹·:3Œ[Û{Xÿ ºâ@‚W–Äé u‚ ¯´*=íή.pûÒdt @G‰¬ s¸ ëÉücr ÞæѨÊ@>¤¢Ö±. Þ'¯°ÌME[YéïĵÂCå½ Ué©Áû'Ê9%eÔðNU”ë‘ÌsD3/®+UI˜9h.WC”빓$#:pz:YÓ ¿xž* ³$Í +$kñAŠ‹†¢ Uê>¸)_š¬÷©ßAÂÔb9ÇU ¯¾á•9¯ÏÏ÷O÷¼¼Fähal1‰3Ì[Ïr•´UCksNÐ] R‘¸¥H+§Šé†c©vÖÞ0iÓ76s†î!§=ß ¼~Ô'°Ãmäoäš³ªøi1úÉ)³yV8 CLÄØÁ‘WYïi€H6ÖÑiámø^ÈY´°Ñ7¥Û*—Ñ©L«Qƒï—Ùrÿ ›£Ð*š¸ˆL©ˆ$ˆ ÷¾D§9È®«qbqC)–ˆïv´çñsÑVT­Ø, <àïºÀO«Jý·õ àfPìð .wFšir´þ’2_Y *Æ€x\« ì€9š@ Ž|F⇥ˆkZ@hÖÄ0t¿-<“‹qµ¾*ZL¤Ú)&BJpÓF5=$„at*Zš$’ÑtdûÝRI1 2Ž‰$€$I$#‰SÞ’Hë¬ï;Á$¡t$’`<(ñÇt)$‡Ð.Êf¢X’Kt=Éé$‚ˆªè¢oÝëòI%Rgcª÷ŠyI%¡‰ÿ !ñ)´õ $¤ Ô’IIGÿÙimport asyncio import base64 import binascii import hashlib import json from typing import Any, Iterable, Optional, Tuple, cast import async_timeout import attr from multidict import CIMultiDict from . import hdrs from .abc import AbstractStreamWriter from .helpers import call_later, set_result from .http import ( WS_CLOSED_MESSAGE, WS_CLOSING_MESSAGE, WS_KEY, WebSocketError, WebSocketReader, WebSocketWriter, WSCloseCode, WSMessage, WSMsgType as WSMsgType, ws_ext_gen, ws_ext_parse, ) from .log import ws_logger from .streams import EofStream, FlowControlDataQueue from .typedefs import Final, JSONDecoder, JSONEncoder from .web_exceptions import HTTPBadRequest, HTTPException from .web_request import BaseRequest from .web_response import StreamResponse __all__ = ( "WebSocketResponse", "WebSocketReady", "WSMsgType", ) THRESHOLD_CONNLOST_ACCESS: Final[int] = 5 @attr.s(auto_attribs=True, frozen=True, slots=True) class WebSocketReady: ok: bool protocol: Optional[str] def __bool__(self) -> bool: return self.ok class WebSocketResponse(StreamResponse): _length_check = False def __init__( self, *, timeout: float = 10.0, receive_timeout: Optional[float] = None, autoclose: bool = True, autoping: bool = True, heartbeat: Optional[float] = None, protocols: Iterable[str] = (), compress: bool = True, max_msg_size: int = 4 * 1024 * 1024, ) -> None: super().__init__(status=101) self._protocols = protocols self._ws_protocol: Optional[str] = None self._writer: Optional[WebSocketWriter] = None self._reader: Optional[FlowControlDataQueue[WSMessage]] = None self._closed = False self._closing = False self._conn_lost = 0 self._close_code: Optional[int] = None self._loop: Optional[asyncio.AbstractEventLoop] = None self._waiting: Optional[asyncio.Future[bool]] = None self._exception: Optional[BaseException] = None self._timeout = timeout self._receive_timeout = receive_timeout self._autoclose = autoclose self._autoping = autoping self._heartbeat = heartbeat self._heartbeat_cb: Optional[asyncio.TimerHandle] = None if heartbeat is not None: self._pong_heartbeat = heartbeat / 2.0 self._pong_response_cb: Optional[asyncio.TimerHandle] = None self._compress = compress self._max_msg_size = max_msg_size def _cancel_heartbeat(self) -> None: if self._pong_response_cb is not None: self._pong_response_cb.cancel() self._pong_response_cb = None if self._heartbeat_cb is not None: self._heartbeat_cb.cancel() self._heartbeat_cb = None def _reset_heartbeat(self) -> None: self._cancel_heartbeat() if self._heartbeat is not None: assert self._loop is not None self._heartbeat_cb = call_later( self._send_heartbeat, self._heartbeat, self._loop ) def _send_heartbeat(self) -> None: if self._heartbeat is not None and not self._closed: assert self._loop is not None # fire-and-forget a task is not perfect but maybe ok for # sending ping. Otherwise we need a long-living heartbeat # task in the class. self._loop.create_task(self._writer.ping()) # type: ignore[union-attr] if self._pong_response_cb is not None: self._pong_response_cb.cancel() self._pong_response_cb = call_later( self._pong_not_received, self._pong_heartbeat, self._loop ) def _pong_not_received(self) -> None: if self._req is not None and self._req.transport is not None: self._closed = True self._close_code = WSCloseCode.ABNORMAL_CLOSURE self._exception = asyncio.TimeoutError() self._req.transport.close() async def prepare(self, request: BaseRequest) -> AbstractStreamWriter: # make pre-check to don't hide it by do_handshake() exceptions if self._payload_writer is not None: return self._payload_writer protocol, writer = self._pre_start(request) payload_writer = await super().prepare(request) assert payload_writer is not None self._post_start(request, protocol, writer) await payload_writer.drain() return payload_writer def _handshake( self, request: BaseRequest ) -> Tuple["CIMultiDict[str]", str, bool, bool]: headers = request.headers if "websocket" != headers.get(hdrs.UPGRADE, "").lower().strip(): raise HTTPBadRequest( text=( "No WebSocket UPGRADE hdr: {}\n Can " '"Upgrade" only to "WebSocket".' ).format(headers.get(hdrs.UPGRADE)) ) if "upgrade" not in headers.get(hdrs.CONNECTION, "").lower(): raise HTTPBadRequest( text="No CONNECTION upgrade hdr: {}".format( headers.get(hdrs.CONNECTION) ) ) # find common sub-protocol between client and server protocol = None if hdrs.SEC_WEBSOCKET_PROTOCOL in headers: req_protocols = [ str(proto.strip()) for proto in headers[hdrs.SEC_WEBSOCKET_PROTOCOL].split(",") ] for proto in req_protocols: if proto in self._protocols: protocol = proto break else: # No overlap found: Return no protocol as per spec ws_logger.warning( "Client protocols %r don’t overlap server-known ones %r", req_protocols, self._protocols, ) # check supported version version = headers.get(hdrs.SEC_WEBSOCKET_VERSION, "") if version not in ("13", "8", "7"): raise HTTPBadRequest(text=f"Unsupported version: {version}") # check client handshake for validity key = headers.get(hdrs.SEC_WEBSOCKET_KEY) try: if not key or len(base64.b64decode(key)) != 16: raise HTTPBadRequest(text=f"Handshake error: {key!r}") except binascii.Error: raise HTTPBadRequest(text=f"Handshake error: {key!r}") from None accept_val = base64.b64encode( hashlib.sha1(key.encode() + WS_KEY).digest() ).decode() response_headers = CIMultiDict( { hdrs.UPGRADE: "websocket", hdrs.CONNECTION: "upgrade", hdrs.SEC_WEBSOCKET_ACCEPT: accept_val, } ) notakeover = False compress = 0 if self._compress: extensions = headers.get(hdrs.SEC_WEBSOCKET_EXTENSIONS) # Server side always get return with no exception. # If something happened, just drop compress extension compress, notakeover = ws_ext_parse(extensions, isserver=True) if compress: enabledext = ws_ext_gen( compress=compress, isserver=True, server_notakeover=notakeover ) response_headers[hdrs.SEC_WEBSOCKET_EXTENSIONS] = enabledext if protocol: response_headers[hdrs.SEC_WEBSOCKET_PROTOCOL] = protocol return ( response_headers, protocol, compress, notakeover, ) # type: ignore[return-value] def _pre_start(self, request: BaseRequest) -> Tuple[str, WebSocketWriter]: self._loop = request._loop headers, protocol, compress, notakeover = self._handshake(request) self.set_status(101) self.headers.update(headers) self.force_close() self._compress = compress transport = request._protocol.transport assert transport is not None writer = WebSocketWriter( request._protocol, transport, compress=compress, notakeover=notakeover ) return protocol, writer def _post_start( self, request: BaseRequest, protocol: str, writer: WebSocketWriter ) -> None: self._ws_protocol = protocol self._writer = writer self._reset_heartbeat() loop = self._loop assert loop is not None self._reader = FlowControlDataQueue(request._protocol, 2**16, loop=loop) request.protocol.set_parser( WebSocketReader(self._reader, self._max_msg_size, compress=self._compress) ) # disable HTTP keepalive for WebSocket request.protocol.keep_alive(False) def can_prepare(self, request: BaseRequest) -> WebSocketReady: if self._writer is not None: raise RuntimeError("Already started") try: _, protocol, _, _ = self._handshake(request) except HTTPException: return WebSocketReady(False, None) else: return WebSocketReady(True, protocol) @property def closed(self) -> bool: return self._closed @property def close_code(self) -> Optional[int]: return self._close_code @property def ws_protocol(self) -> Optional[str]: return self._ws_protocol @property def compress(self) -> bool: return self._compress def exception(self) -> Optional[BaseException]: return self._exception async def ping(self, message: bytes = b"") -> None: if self._writer is None: raise RuntimeError("Call .prepare() first") await self._writer.ping(message) async def pong(self, message: bytes = b"") -> None: # unsolicited pong if self._writer is None: raise RuntimeError("Call .prepare() first") await self._writer.pong(message) async def send_str(self, data: str, compress: Optional[bool] = None) -> None: if self._writer is None: raise RuntimeError("Call .prepare() first") if not isinstance(data, str): raise TypeError("data argument must be str (%r)" % type(data)) await self._writer.send(data, binary=False, compress=compress) async def send_bytes(self, data: bytes, compress: Optional[bool] = None) -> None: if self._writer is None: raise RuntimeError("Call .prepare() first") if not isinstance(data, (bytes, bytearray, memoryview)): raise TypeError("data argument must be byte-ish (%r)" % type(data)) await self._writer.send(data, binary=True, compress=compress) async def send_json( self, data: Any, compress: Optional[bool] = None, *, dumps: JSONEncoder = json.dumps, ) -> None: await self.send_str(dumps(data), compress=compress) async def write_eof(self) -> None: # type: ignore[override] if self._eof_sent: return if self._payload_writer is None: raise RuntimeError("Response has not been started") await self.close() self._eof_sent = True async def close(self, *, code: int = WSCloseCode.OK, message: bytes = b"") -> bool: if self._writer is None: raise RuntimeError("Call .prepare() first") self._cancel_heartbeat() reader = self._reader assert reader is not None # we need to break `receive()` cycle first, # `close()` may be called from different task if self._waiting is not None and not self._closed: reader.feed_data(WS_CLOSING_MESSAGE, 0) await self._waiting if not self._closed: self._closed = True try: await self._writer.close(code, message) writer = self._payload_writer assert writer is not None await writer.drain() except (asyncio.CancelledError, asyncio.TimeoutError): self._close_code = WSCloseCode.ABNORMAL_CLOSURE raise except Exception as exc: self._close_code = WSCloseCode.ABNORMAL_CLOSURE self._exception = exc return True if self._closing: return True reader = self._reader assert reader is not None try: async with async_timeout.timeout(self._timeout): msg = await reader.read() except asyncio.CancelledError: self._close_code = WSCloseCode.ABNORMAL_CLOSURE raise except Exception as exc: self._close_code = WSCloseCode.ABNORMAL_CLOSURE self._exception = exc return True if msg.type == WSMsgType.CLOSE: self._close_code = msg.data return True self._close_code = WSCloseCode.ABNORMAL_CLOSURE self._exception = asyncio.TimeoutError() return True else: return False async def receive(self, timeout: Optional[float] = None) -> WSMessage: if self._reader is None: raise RuntimeError("Call .prepare() first") loop = self._loop assert loop is not None while True: if self._waiting is not None: raise RuntimeError("Concurrent call to receive() is not allowed") if self._closed: self._conn_lost += 1 if self._conn_lost >= THRESHOLD_CONNLOST_ACCESS: raise RuntimeError("WebSocket connection is closed.") return WS_CLOSED_MESSAGE elif self._closing: return WS_CLOSING_MESSAGE try: self._waiting = loop.create_future() try: async with async_timeout.timeout(timeout or self._receive_timeout): msg = await self._reader.read() self._reset_heartbeat() finally: waiter = self._waiting set_result(waiter, True) self._waiting = None except (asyncio.CancelledError, asyncio.TimeoutError): self._close_code = WSCloseCode.ABNORMAL_CLOSURE raise except EofStream: self._close_code = WSCloseCode.OK await self.close() return WSMessage(WSMsgType.CLOSED, None, None) except WebSocketError as exc: self._close_code = exc.code await self.close(code=exc.code) return WSMessage(WSMsgType.ERROR, exc, None) except Exception as exc: self._exception = exc self._closing = True self._close_code = WSCloseCode.ABNORMAL_CLOSURE await self.close() return WSMessage(WSMsgType.ERROR, exc, None) if msg.type == WSMsgType.CLOSE: self._closing = True self._close_code = msg.data if not self._closed and self._autoclose: await self.close() elif msg.type == WSMsgType.CLOSING: self._closing = True elif msg.type == WSMsgType.PING and self._autoping: await self.pong(msg.data) continue elif msg.type == WSMsgType.PONG and self._autoping: continue return msg async def receive_str(self, *, timeout: Optional[float] = None) -> str: msg = await self.receive(timeout) if msg.type != WSMsgType.TEXT: raise TypeError( "Received message {}:{!r} is not WSMsgType.TEXT".format( msg.type, msg.data ) ) return cast(str, msg.data) async def receive_bytes(self, *, timeout: Optional[float] = None) -> bytes: msg = await self.receive(timeout) if msg.type != WSMsgType.BINARY: raise TypeError(f"Received message {msg.type}:{msg.data!r} is not bytes") return cast(bytes, msg.data) async def receive_json( self, *, loads: JSONDecoder = json.loads, timeout: Optional[float] = None ) -> Any: data = await self.receive_str(timeout=timeout) return loads(data) async def write(self, data: bytes) -> None: raise RuntimeError("Cannot call .write() for websocket") def __aiter__(self) -> "WebSocketResponse": return self async def __anext__(self) -> WSMessage: msg = await self.receive() if msg.type in (WSMsgType.CLOSE, WSMsgType.CLOSING, WSMsgType.CLOSED): raise StopAsyncIteration return msg def _cancel(self, exc: BaseException) -> None: if self._reader is not None: self._reader.set_exception(exc)