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compression_utils.py

import asyncio
import zlib
from concurrent.futures import Executor
from typing import Optional, cast

try:
    try:
        import brotlicffi as brotli
    except ImportError:
        import brotli

HAS_BROTLI = True
except ImportError:  # pragma: no cover
    HAS_BROTLI = False

MAX_SYNC_CHUNK_SIZE = 1024

def encoding_to_mode(
    encoding: Optional[str] = None,
    suppress_deflate_header: bool = False,
) -> int:
    if encoding == "gzip":
        return 16 + zlib.MAX_WBITS

return -zlib.MAX_WBITS if suppress_deflate_header else zlib.MAX_WBITS

class ZlibBaseHandler:
    def __init__(
        self,
        mode: int,
        executor: Optional[Executor] = None,
        max_sync_chunk_size: Optional[int] = MAX_SYNC_CHUNK_SIZE,
    ):
        self._mode = mode
        self._executor = executor
        self._max_sync_chunk_size = max_sync_chunk_size

class ZLibCompressor(ZlibBaseHandler):
    def __init__(
        self,
        encoding: Optional[str] = None,
        suppress_deflate_header: bool = False,
        level: Optional[int] = None,
        wbits: Optional[int] = None,
        strategy: int = zlib.Z_DEFAULT_STRATEGY,
        executor: Optional[Executor] = None,
        max_sync_chunk_size: Optional[int] = MAX_SYNC_CHUNK_SIZE,
    ):
        super().__init__(
            mode=encoding_to_mode(encoding, suppress_deflate_header)
            if wbits is None
            else wbits,
            executor=executor,
            max_sync_chunk_size=max_sync_chunk_size,
        )
        if level is None:
            self._compressor = zlib.compressobj(wbits=self._mode, strategy=strategy)
        else:
            self._compressor = zlib.compressobj(
                wbits=self._mode, strategy=strategy, level=level
            )
        self._compress_lock = asyncio.Lock()

def compress_sync(self, data: bytes) -> bytes:
        return self._compressor.compress(data)

async def compress(self, data: bytes) -> bytes:
        async with self._compress_lock:
            # To ensure the stream is consistent in the event
            # there are multiple writers, we need to lock
            # the compressor so that only one writer can
            # compress at a time.
            if (
                self._max_sync_chunk_size is not None
                and len(data) > self._max_sync_chunk_size
            ):
                return await asyncio.get_event_loop().run_in_executor(
                    self._executor, self.compress_sync, data
                )
            return self.compress_sync(data)

def flush(self, mode: int = zlib.Z_FINISH) -> bytes:
        return self._compressor.flush(mode)

class ZLibDecompressor(ZlibBaseHandler):
    def __init__(
        self,
        encoding: Optional[str] = None,
        suppress_deflate_header: bool = False,
        executor: Optional[Executor] = None,
        max_sync_chunk_size: Optional[int] = MAX_SYNC_CHUNK_SIZE,
    ):
        super().__init__(
            mode=encoding_to_mode(encoding, suppress_deflate_header),
            executor=executor,
            max_sync_chunk_size=max_sync_chunk_size,
        )
        self._decompressor = zlib.decompressobj(wbits=self._mode)

def decompress_sync(self, data: bytes, max_length: int = 0) -> bytes:
        return self._decompressor.decompress(data, max_length)

async def decompress(self, data: bytes, max_length: int = 0) -> bytes:
        if (
            self._max_sync_chunk_size is not None
            and len(data) > self._max_sync_chunk_size
        ):
            return await asyncio.get_event_loop().run_in_executor(
                self._executor, self.decompress_sync, data, max_length
            )
        return self.decompress_sync(data, max_length)

def flush(self, length: int = 0) -> bytes:
        return (
            self._decompressor.flush(length)
            if length > 0
            else self._decompressor.flush()
        )

@property
    def eof(self) -> bool:
        return self._decompressor.eof

@property
    def unconsumed_tail(self) -> bytes:
        return self._decompressor.unconsumed_tail

@property
    def unused_data(self) -> bytes:
        return self._decompressor.unused_data

class BrotliDecompressor:
    # Supports both 'brotlipy' and 'Brotli' packages
    # since they share an import name. The top branches
    # are for 'brotlipy' and bottom branches for 'Brotli'
    def __init__(self) -> None:
        if not HAS_BROTLI:
            raise RuntimeError(
                "The brotli decompression is not available. "
                "Please install `Brotli` module"
            )
        self._obj = brotli.Decompressor()

def decompress_sync(self, data: bytes) -> bytes:
        if hasattr(self._obj, "decompress"):
            return cast(bytes, self._obj.decompress(data))
        return cast(bytes, self._obj.process(data))

def flush(self) -> bytes:
        if hasattr(self._obj, "flush"):
            return cast(bytes, self._obj.flush())
        return b""

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	drwxr-xr-x	2025-01-11 06:01:10
..	dir	-	root/root	drwxr-xr-x	2025-02-27 06:01:09
.hash	dir	-	root/root	drwxr-xr-x	2025-01-11 06:01:10
__pycache__	dir	-	root/root	drwxr-xr-x	2025-01-11 06:04:47
__init__.py	text/x-script.python	7.58 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
_cparser.pxd	text/plain	4.22 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
_find_header.pxd	text/plain	68 B	root/root	-rw-r--r--	2024-12-18 10:23:16
_headers.pxi	text/x-script.python	1.96 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
_helpers.cpython-311-x86_64-linux-gnu.so	application/x-pie-executable	86.01 KB	root/root	-rwxr-xr-x	2024-12-18 10:23:52
_helpers.pyi	text/x-script.python	202 B	root/root	-rw-r--r--	2024-12-18 10:23:16
_helpers.pyx	text/x-script.python	1.02 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
_http_parser.cpython-311-x86_64-linux-gnu.so	application/x-pie-executable	569.59 KB	root/root	-rwxr-xr-x	2024-12-18 10:23:52
_http_parser.pyx	text/x-script.python	27.4 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
_http_writer.cpython-311-x86_64-linux-gnu.so	application/x-pie-executable	75.01 KB	root/root	-rwxr-xr-x	2024-12-18 10:23:52
_http_writer.pyx	text/x-script.python	4.47 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
_websocket.cpython-311-x86_64-linux-gnu.so	application/x-pie-executable	53.37 KB	root/root	-rwxr-xr-x	2024-12-18 10:23:52
_websocket.pyx	text/x-script.python	1.52 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
abc.py	text/x-script.python	5.37 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
base_protocol.py	text/x-script.python	2.68 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
client.py	text/plain	46.17 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
client_exceptions.py	text/plain	9.19 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
client_proto.py	text/x-script.python	8.45 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
client_reqrep.py	text/x-script.python	38.75 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
client_ws.py	text/plain	10.75 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
compression_utils.py	text/x-script.python	4.9 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
connector.py	text/x-script.python	51.56 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
cookiejar.py	text/x-script.python	13.69 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
formdata.py	text/x-script.python	5.96 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
hdrs.py	text/plain	4.5 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
helpers.py	text/plain	29.55 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
http.py	text/x-script.python	1.8 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
http_exceptions.py	text/plain	2.65 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
http_parser.py	text/x-script.python	34.66 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
http_websocket.py	text/plain	26.09 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
http_writer.py	text/plain	5.79 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
locks.py	text/x-script.python	1.11 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
log.py	text/plain	325 B	root/root	-rw-r--r--	2024-12-18 10:23:16
multipart.py	text/x-script.python	31.71 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
payload.py	text/x-script.python	13.22 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
payload_streamer.py	text/plain	2.04 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
py.typed	text/plain	7 B	root/root	-rw-r--r--	2024-12-18 10:23:16
pytest_plugin.py	text/x-script.python	11.33 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
resolver.py	text/x-script.python	4.95 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
streams.py	text/x-script.python	20.35 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
tcp_helpers.py	text/plain	961 B	root/root	-rw-r--r--	2024-12-18 10:23:16
test_utils.py	text/plain	19.71 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
tracing.py	text/x-script.python	14.78 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
typedefs.py	text/x-script.python	1.44 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
web.py	text/x-script.python	18.81 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
web_app.py	text/x-script.python	17.88 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
web_exceptions.py	text/x-script.python	10.12 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
web_fileresponse.py	text/x-script.python	11.15 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
web_log.py	text/x-script.python	7.62 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
web_middlewares.py	text/x-script.python	3.94 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
web_protocol.py	text/x-script.python	22.5 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
web_request.py	text/x-script.python	28.08 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
web_response.py	text/x-script.python	27.08 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
web_routedef.py	text/x-script.python	5.99 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
web_runner.py	text/x-script.python	11.46 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
web_server.py	text/plain	2.53 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
web_urldispatcher.py	text/x-script.python	39.12 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
web_ws.py	text/x-script.python	18.21 KB	root/root	-rw-r--r--	2024-12-18 10:23:16
worker.py	text/plain	7.78 KB	root/root	-rw-r--r--	2024-12-18 10:23:16