diff options
Diffstat (limited to 'testing/mochitest/pywebsocket3/mod_pywebsocket/handshake')
3 files changed, 729 insertions, 0 deletions
diff --git a/testing/mochitest/pywebsocket3/mod_pywebsocket/handshake/__init__.py b/testing/mochitest/pywebsocket3/mod_pywebsocket/handshake/__init__.py new file mode 100644 index 0000000000..4bc1c67c57 --- /dev/null +++ b/testing/mochitest/pywebsocket3/mod_pywebsocket/handshake/__init__.py @@ -0,0 +1,101 @@ +# Copyright 2011, 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. +"""WebSocket opening handshake processor. This class try to apply available +opening handshake processors for each protocol version until a connection is +successfully established. +""" + +from __future__ import absolute_import +import logging + +from mod_pywebsocket import common +from mod_pywebsocket.handshake import hybi +# Export AbortedByUserException, HandshakeException, and VersionException +# symbol from this module. +from mod_pywebsocket.handshake.base import AbortedByUserException +from mod_pywebsocket.handshake.base import HandshakeException +from mod_pywebsocket.handshake.base import VersionException + +_LOGGER = logging.getLogger(__name__) + + +def do_handshake(request, dispatcher): + """Performs WebSocket handshake. + + Args: + request: mod_python request. + dispatcher: Dispatcher (dispatch.Dispatcher). + + Handshaker will add attributes such as ws_resource in performing + handshake. + """ + + _LOGGER.debug('Client\'s opening handshake resource: %r', request.uri) + # To print mimetools.Message as escaped one-line string, we converts + # headers_in to dict object. Without conversion, if we use %r, it just + # prints the type and address, and if we use %s, it prints the original + # header string as multiple lines. + # + # Both mimetools.Message and MpTable_Type of mod_python can be + # converted to dict. + # + # mimetools.Message.__str__ returns the original header string. + # dict(mimetools.Message object) returns the map from header names to + # header values. While MpTable_Type doesn't have such __str__ but just + # __repr__ which formats itself as well as dictionary object. + _LOGGER.debug('Client\'s opening handshake headers: %r', + dict(request.headers_in)) + + handshakers = [] + handshakers.append(('RFC 6455', hybi.Handshaker(request, dispatcher))) + + for name, handshaker in handshakers: + _LOGGER.debug('Trying protocol version %s', name) + try: + handshaker.do_handshake() + _LOGGER.info('Established (%s protocol)', name) + return + except HandshakeException as e: + _LOGGER.debug( + 'Failed to complete opening handshake as %s protocol: %r', + name, e) + if e.status: + raise e + except AbortedByUserException as e: + raise + except VersionException as e: + raise + + # TODO(toyoshim): Add a test to cover the case all handshakers fail. + raise HandshakeException( + 'Failed to complete opening handshake for all available protocols', + status=common.HTTP_STATUS_BAD_REQUEST) + + +# vi:sts=4 sw=4 et diff --git a/testing/mochitest/pywebsocket3/mod_pywebsocket/handshake/base.py b/testing/mochitest/pywebsocket3/mod_pywebsocket/handshake/base.py new file mode 100644 index 0000000000..12fa8ece25 --- /dev/null +++ b/testing/mochitest/pywebsocket3/mod_pywebsocket/handshake/base.py @@ -0,0 +1,399 @@ +# 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. +"""Common functions and exceptions used by WebSocket opening handshake +processors. +""" + +from __future__ import absolute_import + +from mod_pywebsocket import common +from mod_pywebsocket import http_header_util +from mod_pywebsocket.extensions import get_extension_processor +from mod_pywebsocket.stream import StreamOptions +from mod_pywebsocket.stream import Stream +from mod_pywebsocket import util + +from six.moves import map +from six.moves import range + +# Defining aliases for values used frequently. +_VERSION_LATEST = common.VERSION_HYBI_LATEST +_VERSION_LATEST_STRING = str(_VERSION_LATEST) +_SUPPORTED_VERSIONS = [ + _VERSION_LATEST, +] + + +class AbortedByUserException(Exception): + """Exception for aborting a connection intentionally. + + If this exception is raised in do_extra_handshake handler, the connection + will be abandoned. No other WebSocket or HTTP(S) handler will be invoked. + + If this exception is raised in transfer_data_handler, the connection will + be closed without closing handshake. No other WebSocket or HTTP(S) handler + will be invoked. + """ + + pass + + +class HandshakeException(Exception): + """This exception will be raised when an error occurred while processing + WebSocket initial handshake. + """ + def __init__(self, name, status=None): + super(HandshakeException, self).__init__(name) + self.status = status + + +class VersionException(Exception): + """This exception will be raised when a version of client request does not + match with version the server supports. + """ + def __init__(self, name, supported_versions=''): + """Construct an instance. + + Args: + supported_version: a str object to show supported hybi versions. + (e.g. '13') + """ + super(VersionException, self).__init__(name) + self.supported_versions = supported_versions + + +def get_default_port(is_secure): + if is_secure: + return common.DEFAULT_WEB_SOCKET_SECURE_PORT + else: + return common.DEFAULT_WEB_SOCKET_PORT + + +def validate_subprotocol(subprotocol): + """Validate a value in the Sec-WebSocket-Protocol field. + + See the Section 4.1., 4.2.2., and 4.3. of RFC 6455. + """ + + if not subprotocol: + raise HandshakeException('Invalid subprotocol name: empty') + + # Parameter should be encoded HTTP token. + state = http_header_util.ParsingState(subprotocol) + token = http_header_util.consume_token(state) + rest = http_header_util.peek(state) + # If |rest| is not None, |subprotocol| is not one token or invalid. If + # |rest| is None, |token| must not be None because |subprotocol| is + # concatenation of |token| and |rest| and is not None. + if rest is not None: + raise HandshakeException('Invalid non-token string in subprotocol ' + 'name: %r' % rest) + + +def parse_host_header(request): + fields = request.headers_in[common.HOST_HEADER].split(':', 1) + if len(fields) == 1: + return fields[0], get_default_port(request.is_https()) + try: + return fields[0], int(fields[1]) + except ValueError as e: + raise HandshakeException('Invalid port number format: %r' % e) + + +def get_mandatory_header(request, key): + value = request.headers_in.get(key) + if value is None: + raise HandshakeException('Header %s is not defined' % key) + return value + + +def validate_mandatory_header(request, key, expected_value, fail_status=None): + value = get_mandatory_header(request, key) + + if value.lower() != expected_value.lower(): + raise HandshakeException( + 'Expected %r for header %s but found %r (case-insensitive)' % + (expected_value, key, value), + status=fail_status) + + +def parse_token_list(data): + """Parses a header value which follows 1#token and returns parsed elements + as a list of strings. + + Leading LWSes must be trimmed. + """ + + state = http_header_util.ParsingState(data) + + token_list = [] + + while True: + token = http_header_util.consume_token(state) + if token is not None: + token_list.append(token) + + http_header_util.consume_lwses(state) + + if http_header_util.peek(state) is None: + break + + if not http_header_util.consume_string(state, ','): + raise HandshakeException('Expected a comma but found %r' % + http_header_util.peek(state)) + + http_header_util.consume_lwses(state) + + if len(token_list) == 0: + raise HandshakeException('No valid token found') + + return token_list + + +class HandshakerBase(object): + def __init__(self, request, dispatcher): + self._logger = util.get_class_logger(self) + self._request = request + self._dispatcher = dispatcher + + """ subclasses must implement the five following methods """ + + def _protocol_rfc(self): + """ Return the name of the RFC that the handshake class is implementing. + """ + + raise AssertionError("subclasses should implement this method") + + def _transform_header(self, header): + """ + :param header: header name + + transform the header name if needed. For example, HTTP/2 subclass will + return the name of the header in lower case. + """ + + raise AssertionError("subclasses should implement this method") + + def _validate_request(self): + """ validate that all the mandatory fields are set """ + + raise AssertionError("subclasses should implement this method") + + def _set_accept(self): + """ Computes accept value based on Sec-WebSocket-Accept if needed. """ + + raise AssertionError("subclasses should implement this method") + + def _send_handshake(self): + """ Prepare and send the response after it has been parsed and processed. + """ + + raise AssertionError("subclasses should implement this method") + + def do_handshake(self): + self._request.ws_close_code = None + self._request.ws_close_reason = None + + # Parsing. + self._validate_request() + self._request.ws_resource = self._request.uri + self._request.ws_version = self._check_version() + + try: + self._get_origin() + self._set_protocol() + self._parse_extensions() + + self._set_accept() + + self._logger.debug('Protocol version is ' + self._protocol_rfc()) + + # Setup extension processors. + self._request.ws_extension_processors = self._get_extension_processors_requested( + ) + + # List of extra headers. The extra handshake handler may add header + # data as name/value pairs to this list and pywebsocket appends + # them to the WebSocket handshake. + self._request.extra_headers = [] + + # Extra handshake handler may modify/remove processors. + self._dispatcher.do_extra_handshake(self._request) + + stream_options = StreamOptions() + self._process_extensions(stream_options) + + self._request.ws_stream = Stream(self._request, stream_options) + + if self._request.ws_requested_protocols is not None: + if self._request.ws_protocol is None: + raise HandshakeException( + 'do_extra_handshake must choose one subprotocol from ' + 'ws_requested_protocols and set it to ws_protocol') + validate_subprotocol(self._request.ws_protocol) + + self._logger.debug('Subprotocol accepted: %r', + self._request.ws_protocol) + else: + if self._request.ws_protocol is not None: + raise HandshakeException( + 'ws_protocol must be None when the client didn\'t ' + 'request any subprotocol') + + self._send_handshake() + except HandshakeException as e: + if not e.status: + # Fallback to 400 bad request by default. + e.status = common.HTTP_STATUS_BAD_REQUEST + raise e + + def _check_version(self): + sec_websocket_version_header = self._transform_header( + common.SEC_WEBSOCKET_VERSION_HEADER) + version = get_mandatory_header(self._request, + sec_websocket_version_header) + if version == _VERSION_LATEST_STRING: + return _VERSION_LATEST + + if version.find(',') >= 0: + raise HandshakeException( + 'Multiple versions (%r) are not allowed for header %s' % + (version, sec_websocket_version_header), + status=common.HTTP_STATUS_BAD_REQUEST) + raise VersionException('Unsupported version %r for header %s' % + (version, sec_websocket_version_header), + supported_versions=', '.join( + map(str, _SUPPORTED_VERSIONS))) + + def _get_origin(self): + origin_header = self._transform_header(common.ORIGIN_HEADER) + origin = self._request.headers_in.get(origin_header) + if origin is None: + self._logger.debug('Client request does not have origin header') + self._request.ws_origin = origin + + def _set_protocol(self): + self._request.ws_protocol = None + # MOZILLA + self._request.sts = None + # /MOZILLA + + sec_websocket_protocol_header = self._transform_header( + common.SEC_WEBSOCKET_PROTOCOL_HEADER) + protocol_header = self._request.headers_in.get( + sec_websocket_protocol_header) + + if protocol_header is None: + self._request.ws_requested_protocols = None + return + + self._request.ws_requested_protocols = parse_token_list( + protocol_header) + self._logger.debug('Subprotocols requested: %r', + self._request.ws_requested_protocols) + + def _parse_extensions(self): + sec_websocket_extensions_header = self._transform_header( + common.SEC_WEBSOCKET_EXTENSIONS_HEADER) + extensions_header = self._request.headers_in.get( + sec_websocket_extensions_header) + if not extensions_header: + self._request.ws_requested_extensions = None + return + + try: + self._request.ws_requested_extensions = common.parse_extensions( + extensions_header) + except common.ExtensionParsingException as e: + raise HandshakeException( + 'Failed to parse sec-websocket-extensions header: %r' % e) + + self._logger.debug( + 'Extensions requested: %r', + list( + map(common.ExtensionParameter.name, + self._request.ws_requested_extensions))) + + def _get_extension_processors_requested(self): + processors = [] + if self._request.ws_requested_extensions is not None: + for extension_request in self._request.ws_requested_extensions: + processor = get_extension_processor(extension_request) + # Unknown extension requests are just ignored. + if processor is not None: + processors.append(processor) + return processors + + def _process_extensions(self, stream_options): + processors = [ + processor for processor in self._request.ws_extension_processors + if processor is not None + ] + + # Ask each processor if there are extensions on the request which + # cannot co-exist. When processor decided other processors cannot + # co-exist with it, the processor marks them (or itself) as + # "inactive". The first extension processor has the right to + # make the final call. + for processor in reversed(processors): + if processor.is_active(): + processor.check_consistency_with_other_processors(processors) + processors = [ + processor for processor in processors if processor.is_active() + ] + + accepted_extensions = [] + + for index, processor in enumerate(processors): + if not processor.is_active(): + continue + + extension_response = processor.get_extension_response() + if extension_response is None: + # Rejected. + continue + + accepted_extensions.append(extension_response) + + processor.setup_stream_options(stream_options) + + # Inactivate all of the following compression extensions. + for j in range(index + 1, len(processors)): + processors[j].set_active(False) + + if len(accepted_extensions) > 0: + self._request.ws_extensions = accepted_extensions + self._logger.debug( + 'Extensions accepted: %r', + list(map(common.ExtensionParameter.name, accepted_extensions))) + else: + self._request.ws_extensions = None + + +# vi:sts=4 sw=4 et diff --git a/testing/mochitest/pywebsocket3/mod_pywebsocket/handshake/hybi.py b/testing/mochitest/pywebsocket3/mod_pywebsocket/handshake/hybi.py new file mode 100644 index 0000000000..5290ea24fb --- /dev/null +++ b/testing/mochitest/pywebsocket3/mod_pywebsocket/handshake/hybi.py @@ -0,0 +1,229 @@ +# 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. +"""This file provides the opening handshake processor for the WebSocket +protocol (RFC 6455). + +Specification: +http://tools.ietf.org/html/rfc6455 +""" + +from __future__ import absolute_import +import base64 +import re +from hashlib import sha1 + +from mod_pywebsocket import common +from mod_pywebsocket.handshake.base import get_mandatory_header +from mod_pywebsocket.handshake.base import HandshakeException +from mod_pywebsocket.handshake.base import parse_token_list +from mod_pywebsocket.handshake.base import validate_mandatory_header +from mod_pywebsocket.handshake.base import HandshakerBase +from mod_pywebsocket import util + +# Used to validate the value in the Sec-WebSocket-Key header strictly. RFC 4648 +# disallows non-zero padding, so the character right before == must be any of +# A, Q, g and w. +_SEC_WEBSOCKET_KEY_REGEX = re.compile('^[+/0-9A-Za-z]{21}[AQgw]==$') + + +def check_request_line(request): + # 5.1 1. The three character UTF-8 string "GET". + # 5.1 2. A UTF-8-encoded U+0020 SPACE character (0x20 byte). + if request.method != u'GET': + raise HandshakeException('Method is not GET: %r' % request.method) + + if request.protocol != u'HTTP/1.1': + raise HandshakeException('Version is not HTTP/1.1: %r' % + request.protocol) + + +def compute_accept(key): + """Computes value for the Sec-WebSocket-Accept header from value of the + Sec-WebSocket-Key header. + """ + + accept_binary = sha1(key + common.WEBSOCKET_ACCEPT_UUID).digest() + accept = base64.b64encode(accept_binary) + + return accept + + +def compute_accept_from_unicode(unicode_key): + """A wrapper function for compute_accept which takes a unicode string as an + argument, and encodes it to byte string. It then passes it on to + compute_accept. + """ + + key = unicode_key.encode('UTF-8') + return compute_accept(key) + + +def format_header(name, value): + return u'%s: %s\r\n' % (name, value) + + +class Handshaker(HandshakerBase): + """Opening handshake processor for the WebSocket protocol (RFC 6455).""" + def __init__(self, request, dispatcher): + """Construct an instance. + + Args: + request: mod_python request. + dispatcher: Dispatcher (dispatch.Dispatcher). + + Handshaker will add attributes such as ws_resource during handshake. + """ + super(Handshaker, self).__init__(request, dispatcher) + + def _transform_header(self, header): + return header + + def _protocol_rfc(self): + return 'RFC 6455' + + def _validate_connection_header(self): + connection = get_mandatory_header(self._request, + common.CONNECTION_HEADER) + + try: + connection_tokens = parse_token_list(connection) + except HandshakeException as e: + raise HandshakeException('Failed to parse %s: %s' % + (common.CONNECTION_HEADER, e)) + + connection_is_valid = False + for token in connection_tokens: + if token.lower() == common.UPGRADE_CONNECTION_TYPE.lower(): + connection_is_valid = True + break + if not connection_is_valid: + raise HandshakeException( + '%s header doesn\'t contain "%s"' % + (common.CONNECTION_HEADER, common.UPGRADE_CONNECTION_TYPE)) + + def _validate_request(self): + check_request_line(self._request) + validate_mandatory_header(self._request, common.UPGRADE_HEADER, + common.WEBSOCKET_UPGRADE_TYPE) + self._validate_connection_header() + unused_host = get_mandatory_header(self._request, common.HOST_HEADER) + + def _set_accept(self): + # Key validation, response generation. + key = self._get_key() + accept = compute_accept(key) + self._logger.debug('%s: %r (%s)', common.SEC_WEBSOCKET_ACCEPT_HEADER, + accept, util.hexify(base64.b64decode(accept))) + self._request._accept = accept + + def _validate_key(self, key): + if key.find(',') >= 0: + raise HandshakeException('Request has multiple %s header lines or ' + 'contains illegal character \',\': %r' % + (common.SEC_WEBSOCKET_KEY_HEADER, key)) + + # Validate + key_is_valid = False + try: + # Validate key by quick regex match before parsing by base64 + # module. Because base64 module skips invalid characters, we have + # to do this in advance to make this server strictly reject illegal + # keys. + if _SEC_WEBSOCKET_KEY_REGEX.match(key): + decoded_key = base64.b64decode(key) + if len(decoded_key) == 16: + key_is_valid = True + except TypeError as e: + pass + + if not key_is_valid: + raise HandshakeException('Illegal value for header %s: %r' % + (common.SEC_WEBSOCKET_KEY_HEADER, key)) + + return decoded_key + + def _get_key(self): + key = get_mandatory_header(self._request, + common.SEC_WEBSOCKET_KEY_HEADER) + + decoded_key = self._validate_key(key) + + self._logger.debug('%s: %r (%s)', common.SEC_WEBSOCKET_KEY_HEADER, key, + util.hexify(decoded_key)) + + return key.encode('UTF-8') + + def _create_handshake_response(self, accept): + response = [] + + response.append(u'HTTP/1.1 101 Switching Protocols\r\n') + + # WebSocket headers + response.append( + format_header(common.UPGRADE_HEADER, + common.WEBSOCKET_UPGRADE_TYPE)) + response.append( + format_header(common.CONNECTION_HEADER, + common.UPGRADE_CONNECTION_TYPE)) + response.append( + format_header(common.SEC_WEBSOCKET_ACCEPT_HEADER, + accept.decode('UTF-8'))) + if self._request.ws_protocol is not None: + response.append( + format_header(common.SEC_WEBSOCKET_PROTOCOL_HEADER, + self._request.ws_protocol)) + if (self._request.ws_extensions is not None + and len(self._request.ws_extensions) != 0): + response.append( + format_header( + common.SEC_WEBSOCKET_EXTENSIONS_HEADER, + common.format_extensions(self._request.ws_extensions))) + + # MOZILLA + if self._request.sts is not None: + response.append(format_header("Strict-Transport-Security", + self._request.sts)) + # /MOZILLA + + # Headers not specific for WebSocket + for name, value in self._request.extra_headers: + response.append(format_header(name, value)) + + response.append(u'\r\n') + + return u''.join(response) + + def _send_handshake(self): + raw_response = self._create_handshake_response(self._request._accept) + self._request.connection.write(raw_response.encode('UTF-8')) + self._logger.debug('Sent server\'s opening handshake: %r', + raw_response) + + +# vi:sts=4 sw=4 et |