1 # Copyright 2013, Google Inc. All rights reserved.
3 # Redistribution and use in source and binary forms, with or without
4 # modification, are permitted provided that the following conditions are
7 # * Redistributions of source code must retain the above copyright
8 # notice, this list of conditions and the following disclaimer.
9 # * Redistributions in binary form must reproduce the above
10 # copyright notice, this list of conditions and the following disclaimer
11 # in the documentation and/or other materials provided with the
13 # * Neither the name of Google Inc. nor the names of its
14 # contributors may be used to endorse or promote products derived from
15 # this software without specific prior written permission.
17 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 from mod_pywebsocket
.extensions
import PerMessageDeflateExtensionProcessor
34 def _get_permessage_deflate_extension_processor(request
):
35 for extension_processor
in request
.ws_extension_processors
:
36 if isinstance(extension_processor
, PerMessageDeflateExtensionProcessor
):
37 return extension_processor
41 def web_socket_do_extra_handshake(request
):
42 processor
= _get_permessage_deflate_extension_processor(request
)
43 # Remove extension processors other than PerMessageDeflateProcessor
45 request
.ws_extension_processors
= [processor
]
48 # Insert fake server_... parameters to make the server create
49 # a negotiation response including the parameters.
50 processor
._request
.add_parameter('server_no_context_takeover', None)
51 processor
._request
.add_parameter('server_max_window_bits', '15')
54 def web_socket_transfer_data(request
):