close_wsh.py - mozsearch

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# Copyright 2012, Google Inc.

# All rights reserved.

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions are

# met:

#     * Redistributions of source code must retain the above copyright

# notice, this list of conditions and the following disclaimer.

#     * Redistributions in binary form must reproduce the above

# copyright notice, this list of conditions and the following disclaimer

# in the documentation and/or other materials provided with the

# distribution.

#     * Neither the name of Google Inc. nor the names of its

# contributors may be used to endorse or promote products derived from

# this software without specific prior written permission.

# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

from __future__ import absolute_import

from pywebsocket3 import common

def web_socket_do_extra_handshake(request):

    pass

def web_socket_transfer_data(request):

    while True:

        line = request.ws_stream.receive_message()

        if line is None:

            return

        code, reason = line.split(' ', 1)

        if code is None or reason is None:

            return

        request.ws_stream.close_connection(int(code), reason)

        # close_connection() initiates closing handshake. It validates code

        # and reason. If you want to send a broken close frame for a test,

        # following code will be useful.

        # > data = struct.pack('!H', int(code)) + reason.encode('UTF-8')

        # > request.connection.write(stream.create_close_frame(data))

        # > # Suppress to re-respond client responding close frame.

        # > raise Exception("customized server initiated closing handshake")

def web_socket_passive_closing_handshake(request):

    # Simply echo a close status code

    code, reason = request.ws_close_code, request.ws_close_reason

    # pywebsocket sets pseudo code for receiving an empty body close frame.

    if code == common.STATUS_NO_STATUS_RECEIVED:

        code = None

        reason = ''

    return code, reason

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