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139 lines
5.2 KiB
Python
139 lines
5.2 KiB
Python
# Copyright 2009, Google Inc.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are
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# met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above
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# copyright notice, this list of conditions and the following disclaimer
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# in the documentation and/or other materials provided with the
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# distribution.
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# * Neither the name of Google Inc. nor the names of its
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# contributors may be used to endorse or promote products derived from
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# this software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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"""PythonHeaderParserHandler for mod_pywebsocket.
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Apache HTTP Server and mod_python must be configured such that this
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function is called to handle Web Socket request.
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"""
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import logging
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from mod_python import apache
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from mod_pywebsocket import dispatch
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from mod_pywebsocket import handshake
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from mod_pywebsocket import util
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# PythonOption to specify the handler root directory.
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_PYOPT_HANDLER_ROOT = 'mod_pywebsocket.handler_root'
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# PythonOption to specify the handler scan directory.
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# This must be a directory under the root directory.
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# The default is the root directory.
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_PYOPT_HANDLER_SCAN = 'mod_pywebsocket.handler_scan'
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# PythonOption to specify to allow draft75 handshake.
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# The default is None (Off)
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_PYOPT_ALLOW_DRAFT75 = 'mod_pywebsocket.allow_draft75'
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class ApacheLogHandler(logging.Handler):
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"""Wrapper logging.Handler to emit log message to apache's error.log"""
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_LEVELS = {
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logging.DEBUG: apache.APLOG_DEBUG,
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logging.INFO: apache.APLOG_INFO,
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logging.WARNING: apache.APLOG_WARNING,
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logging.ERROR: apache.APLOG_ERR,
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logging.CRITICAL: apache.APLOG_CRIT,
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}
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def __init__(self, request=None):
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logging.Handler.__init__(self)
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self.log_error = apache.log_error
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if request is not None:
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self.log_error = request.log_error
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def emit(self, record):
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apache_level = apache.APLOG_DEBUG
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if record.levelno in ApacheLogHandler._LEVELS:
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apache_level = ApacheLogHandler._LEVELS[record.levelno]
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self.log_error(record.getMessage(), apache_level)
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logging.getLogger("mod_pywebsocket").addHandler(ApacheLogHandler())
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def _create_dispatcher():
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_HANDLER_ROOT = apache.main_server.get_options().get(
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_PYOPT_HANDLER_ROOT, None)
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if not _HANDLER_ROOT:
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raise Exception('PythonOption %s is not defined' % _PYOPT_HANDLER_ROOT,
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apache.APLOG_ERR)
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_HANDLER_SCAN = apache.main_server.get_options().get(
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_PYOPT_HANDLER_SCAN, _HANDLER_ROOT)
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dispatcher = dispatch.Dispatcher(_HANDLER_ROOT, _HANDLER_SCAN)
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for warning in dispatcher.source_warnings():
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apache.log_error('mod_pywebsocket: %s' % warning, apache.APLOG_WARNING)
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return dispatcher
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# Initialize
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_dispatcher = _create_dispatcher()
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def headerparserhandler(request):
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"""Handle request.
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Args:
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request: mod_python request.
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This function is named headerparserhandler because it is the default name
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for a PythonHeaderParserHandler.
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"""
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try:
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allowDraft75 = apache.main_server.get_options().get(
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_PYOPT_ALLOW_DRAFT75, None)
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handshaker = handshake.Handshaker(request, _dispatcher,
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allowDraft75=allowDraft75)
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handshaker.do_handshake()
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request.log_error('mod_pywebsocket: resource: %r' % request.ws_resource,
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apache.APLOG_DEBUG)
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try:
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_dispatcher.transfer_data(request)
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except Exception, e:
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# Catch exception in transfer_data.
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# In this case, handshake has been successful, so just log the
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# exception and return apache.DONE
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request.log_error('mod_pywebsocket: %s' % e, apache.APLOG_WARNING)
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except handshake.HandshakeError, e:
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# Handshake for ws/wss failed.
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# But the request can be valid http/https request.
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request.log_error('mod_pywebsocket: %s' % e, apache.APLOG_INFO)
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return apache.DECLINED
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except dispatch.DispatchError, e:
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request.log_error('mod_pywebsocket: %s' % e, apache.APLOG_WARNING)
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return apache.DECLINED
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return apache.DONE # Return DONE such that no other handlers are invoked.
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# vi:sts=4 sw=4 et
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