o g>d@sddlmZddlZddlmZddlmZddlmZddl m Z m Z m Z m Z mZmZddlmZmZd d lmZmZmZgd Zd Zd deddDZGdddeZd1ddZd2d"d#ZGd$d%d%eZd3d)d*ZGd+d,d,eZd4d/d0Z dS)5) annotationsN)Sequence)Any)frames)DuplicateParameterInvalidParameterNameInvalidParameterValueNegotiationError PayloadTooBig ProtocolError) ExtensionNameExtensionParameter)ClientExtensionFactory ExtensionServerExtensionFactory)PerMessageDeflateClientPerMessageDeflateFactory enable_client_permessage_deflateServerPerMessageDeflateFactory enable_server_permessage_deflatescCsg|]}t|qS)str).0bitsrr_/var/www/visachat/venv/lib/python3.10/site-packages/websockets/extensions/permessage_deflate.py src@sJeZdZdZedZ ddddZdddZdddddZd ddZ dS)!rz) Per-Message Deflate extension. permessage-deflateNremote_no_context_takeoverboollocal_no_context_takeoverremote_max_window_bitsintlocal_max_window_bitscompress_settingsdict[Any, Any] | NonereturnNonecCs|duri}|dvs J|dvsJd|krdks JJd|kr+dks.JJd|vs4J||_||_||_||_||_|jsOtj|j d|_|js`tjdd|j i|j|_ d|_ dS) z? Configure the Per-Message Deflate extension. N)FTrwbitsr,Fr) r!r#r$r&r'zlib decompressobjdecoder compressobjencoderdecode_cont_data)selfr!r#r$r&r'rrr__init__)s*     zPerMessageDeflate.__init__rc Cs&d|jd|jd|jd|jd S)Nz-PerMessageDeflate(remote_no_context_takeover=z, local_no_context_takeover=z, remote_max_window_bits=z, local_max_window_bits=))r!r#r$r&r4rrr__repr__SszPerMessageDeflate.__repr__)max_sizeframe frames.Framer9 int | Nonec Cs>|jtjvr|S|jtjur|js|S|jrd|_n|js|S|js%d|_|jr1tj |j d|_ |jrCt |j dkrCt|j t}n|j }|durLdn|}z(|j ||}|j jre|dus`Jtd||jrut |j dkru|j tWntjy}ztd|d}~ww|jr|jr|` t|j||jd|j|jS)z, Decode an incoming frame. FTr-iNrzdecompression failed)opcoder CTRL_OPCODESOP_CONTr3finrsv1r!r.r/r$r0lendatabytes_EMPTY_UNCOMPRESSED_BLOCK decompressunconsumed_tailr errorr Framersv2rsv3)r4r:r9rC max_lengthexcrrrdecode\sP       zPerMessageDeflate.decodecCs|jtjvr|S|jtjur|jrtjdd|j i|j|_ |j |j |j tj }|jrO|ddtks:Jt|dkrG|dd}nt|dd}|jrW|jrW|` t|j||j|jtju|j|jS)z, Encode an outgoing frame. r,Nir)r=rr>r?r#r.r1r&r'r2compressrCflush Z_SYNC_FLUSHr@rErB memoryviewrIrJrK)r4r:rCrrrencodes2     zPerMessageDeflate.encodeN) r!r"r#r"r$r%r&r%r'r(r)r*)r)r)r:r;r9r<r)r;)r:r;r)r;) __name__ __module__ __qualname____doc__r namer5r8rNrTrrrrr!s * Hrserver_no_context_takeoverr"client_no_context_takeoverserver_max_window_bitsr<client_max_window_bitsint | bool | Noner)list[ExtensionParameter]cCsfg}|r |d|r|d|r|dt|f|dur&|d|S|r1|dt|f|S)zS Build a list of ``(name, value)`` pairs for some compression parameters. )r[N)r\Nr]T)r^Nr^)appendr)r[r\r]r^paramsrrr_build_parameterss    rcrbSequence[ExtensionParameter] is_server0tuple[bool, bool, int | None, int | bool | None]cCsd}d}d}d}|D]p\}}|dkr$|rt||durd}q t|||dkr:|r.t||dur5d}q t|||dkrT|durFt||tvrOt|}q t|||dkrw|dur`t||ri|durid}q |tvrrt|}q t||t|||||fS)z Extract compression parameters from a list of ``(name, value)`` pairs. If ``is_server`` is :obj:`True`, ``client_max_window_bits`` may be provided without a value. This is only allowed in handshake requests. FNr[Tr\r]r^)rr _MAX_WINDOW_BITS_VALUESr%r)rbrer[r\r]r^rZvaluerrr_extract_parameterssJ         ric@sBeZdZdZedZ     ddddZdddZd ddZdS)!ra Client-side extension factory for the Per-Message Deflate extension. Parameters behave as described in `section 7.1 of RFC 7692`_. .. _section 7.1 of RFC 7692: https://datatracker.ietf.org/doc/html/rfc7692#section-7.1 Set them to :obj:`True` to include them in the negotiation offer without a value or to an integer value to include them with this value. Args: server_no_context_takeover: Prevent server from using context takeover. client_no_context_takeover: Prevent client from using context takeover. server_max_window_bits: Maximum size of the server's LZ77 sliding window in bits, between 8 and 15. client_max_window_bits: Maximum size of the client's LZ77 sliding window in bits, between 8 and 15, or :obj:`True` to indicate support without setting a limit. compress_settings: Additional keyword arguments for :func:`zlib.compressobj`, excluding ``wbits``. r FNTr[r"r\r]r<r^r_r'dict[str, Any] | Noner)r*cCs|dusd|krdkstdtd|dus0|dus0d|kr+dks0tdtd|duryzIClientPerMessageDeflateFactory.process_response_params..zreceived duplicate Frez#expected server_no_context_takeoverTNzexpected server_max_window_bitsz"unsupported server_max_window_bitsz!unexpected client_max_window_bitsz"unsupported client_max_window_bitsr+) anyr rZrir[r\r]r^rr'r4rbrpr[r\r]r^rr7rprocess_response_paramsnsJ        z6ClientPerMessageDeflateFactory.process_response_params)FFNTN) r[r"r\r"r]r<r^r_r'rjr)r*)r)r`)rbrdrprqr)r) rVrWrXrYr rZr5ror{rrrrr(s  r extensions'Sequence[ClientExtensionFactory] | None Sequence[ClientExtensionFactory]cCs:|durg}tdd|Dst|tddidg}|S)z Enable Per-Message Deflate with default settings in client extensions. If the extension is already present, perhaps with non-default settings, the configuration isn't changed. Ncs|] }|jtjkVqdSrU)rZr)rextension_factoryrrrrv  z3enable_client_permessage_deflate..memLevel)r')rylistrr|rrrrs rc@s:eZdZdZedZ      ddddZdddZdS)ra Server-side extension factory for the Per-Message Deflate extension. Parameters behave as described in `section 7.1 of RFC 7692`_. .. _section 7.1 of RFC 7692: https://datatracker.ietf.org/doc/html/rfc7692#section-7.1 Set them to :obj:`True` to include them in the negotiation offer without a value or to an integer value to include them with this value. Args: server_no_context_takeover: Prevent server from using context takeover. client_no_context_takeover: Prevent client from using context takeover. server_max_window_bits: Maximum size of the server's LZ77 sliding window in bits, between 8 and 15. client_max_window_bits: Maximum size of the client's LZ77 sliding window in bits, between 8 and 15. compress_settings: Additional keyword arguments for :func:`zlib.compressobj`, excluding ``wbits``. require_client_max_window_bits: Do not enable compression at all if client doesn't advertise support for ``client_max_window_bits``; the default behavior is to enable compression without enforcing ``client_max_window_bits``. r FNr[r"r\r]r<r^r'rjrequire_client_max_window_bitsr)r*cCs|dusd|krdkstdtd|dus,d|kr'dks,tdtd|dur8d|vr8td|durB|rBtd||_||_||_||_||_||_dS) rkNrr+rlrmr,zLcompress_settings must not include wbits, set server_max_window_bits insteadzVrequire_client_max_window_bits is enabled, but client_max_window_bits isn't configured)rnr[r\r]r^r'r)r4r[r\r]r^r'rrrrr5 s,   z'ServerPerMessageDeflateFactory.__init__rbrdrprq2tuple[list[ExtensionParameter], PerMessageDeflate]cstfdd|Drtdjt|dd\}}}}jr$|s$d}jr+|s+d}jdur1n|dur9j}n|jkrAj}jdurN|durMj}n|durZjrYtdn|durbj}nj|krjj}t ||||t |||pvd|pydj fS) zi Process request parameters. Return response params and an extension instance. c3rrrUrsrtr7rrrv;rwzHServerPerMessageDeflateFactory.process_request_params..zskipped duplicate TrxNzrequired client_max_window_bitsr+) ryr rZrir[r\r]r^rrcrr'rzrr7rprocess_request_params0s\       z5ServerPerMessageDeflateFactory.process_request_params)FFNNNF)r[r"r\r"r]r<r^r<r'rjrr"r)r*)rbrdrprqr)r)rVrWrXrYr rZr5rrrrrrs #r'Sequence[ServerExtensionFactory] | None Sequence[ServerExtensionFactory]cCs>|durg}tdd|Dst|tddddidg}|S)z Enable Per-Message Deflate with default settings in server extensions. If the extension is already present, perhaps with non-default settings, the configuration isn't changed. NcsrrU)rZr)r ext_factoryrrrrvrz3enable_server_permessage_deflate.. rr)r]r^r')ryrrrrrrrs r) r[r"r\r"r]r<r^r_r)r`)rbrdrer"r)rf)r|r}r)r~)r|rr)r)! __future__rr.collections.abcrtypingrr exceptionsrrr r r r r rbaserrr__all__rErangergrrcrirrrrrrrrs*      3 = 13