RAHHH

backend/lib/python3.12/site-packages/autobahn/websocket/compress.py

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+###############################################################################
+#
+# The MIT License (MIT)
+#
+# Copyright (c) typedef int GmbH
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+#
+###############################################################################
+
+from autobahn.websocket.compress_base import \
+    PerMessageCompressOffer, \
+    PerMessageCompressOfferAccept, \
+    PerMessageCompressResponse, \
+    PerMessageCompressResponseAccept, \
+    PerMessageCompress
+
+from autobahn.websocket.compress_deflate import \
+    PerMessageDeflateMixin, \
+    PerMessageDeflateOffer, \
+    PerMessageDeflateOfferAccept, \
+    PerMessageDeflateResponse, \
+    PerMessageDeflateResponseAccept, \
+    PerMessageDeflate
+
+# this must be a list (not tuple), since we dynamically
+# extend it ..
+__all__ = [
+    'PerMessageCompressOffer',
+    'PerMessageCompressOfferAccept',
+    'PerMessageCompressResponse',
+    'PerMessageCompressResponseAccept',
+    'PerMessageCompress',
+    'PerMessageDeflateOffer',
+    'PerMessageDeflateOfferAccept',
+    'PerMessageDeflateResponse',
+    'PerMessageDeflateResponseAccept',
+    'PerMessageDeflate',
+    'PERMESSAGE_COMPRESSION_EXTENSION'
+]
+
+# map of available compression extensions
+PERMESSAGE_COMPRESSION_EXTENSION = {
+    # class for 'permessage-deflate' is always available
+    PerMessageDeflateMixin.EXTENSION_NAME: {
+        'Offer': PerMessageDeflateOffer,
+        'OfferAccept': PerMessageDeflateOfferAccept,
+        'Response': PerMessageDeflateResponse,
+        'ResponseAccept': PerMessageDeflateResponseAccept,
+        'PMCE': PerMessageDeflate
+    }
+}
+
+
+# include 'permessage-bzip2' classes if bzip2 is available
+try:
+    import bz2
+except ImportError:
+    bz2 = None
+else:
+    from autobahn.websocket.compress_bzip2 import \
+        PerMessageBzip2Mixin, \
+        PerMessageBzip2Offer, \
+        PerMessageBzip2OfferAccept, \
+        PerMessageBzip2Response, \
+        PerMessageBzip2ResponseAccept, \
+        PerMessageBzip2
+
+    PMCE = {
+        'Offer': PerMessageBzip2Offer,
+        'OfferAccept': PerMessageBzip2OfferAccept,
+        'Response': PerMessageBzip2Response,
+        'ResponseAccept': PerMessageBzip2ResponseAccept,
+        'PMCE': PerMessageBzip2
+    }
+    PERMESSAGE_COMPRESSION_EXTENSION[PerMessageBzip2Mixin.EXTENSION_NAME] = PMCE
+
+    __all__.extend(['PerMessageBzip2Offer',
+                    'PerMessageBzip2OfferAccept',
+                    'PerMessageBzip2Response',
+                    'PerMessageBzip2ResponseAccept',
+                    'PerMessageBzip2'])
+
+
+# include 'permessage-snappy' classes if Snappy is available
+try:
+    # noinspection PyPackageRequirements
+    import snappy
+except ImportError:
+    snappy = None
+else:
+    from autobahn.websocket.compress_snappy import \
+        PerMessageSnappyMixin, \
+        PerMessageSnappyOffer, \
+        PerMessageSnappyOfferAccept, \
+        PerMessageSnappyResponse, \
+        PerMessageSnappyResponseAccept, \
+        PerMessageSnappy
+
+    PMCE = {
+        'Offer': PerMessageSnappyOffer,
+        'OfferAccept': PerMessageSnappyOfferAccept,
+        'Response': PerMessageSnappyResponse,
+        'ResponseAccept': PerMessageSnappyResponseAccept,
+        'PMCE': PerMessageSnappy
+    }
+    PERMESSAGE_COMPRESSION_EXTENSION[PerMessageSnappyMixin.EXTENSION_NAME] = PMCE
+
+    __all__.extend(['PerMessageSnappyOffer',
+                    'PerMessageSnappyOfferAccept',
+                    'PerMessageSnappyResponse',
+                    'PerMessageSnappyResponseAccept',
+                    'PerMessageSnappy'])