Remove support for older Python

All active distributions should now support at least Python 3.4, so
let's clean things up by removing older compatibility code.

.travis.yml

@@ -1,6 +1,5 @@
 language: python
 python:
-    - 2.7
     - 3.6
 
 install:

test-requirements.txt

@@ -1,5 +1,5 @@
 mock
 nose
-jwcrypto;python_version>="2.7"
-redis;python_version>="2.7"
-simplejson;python_version>="2.7"
+jwcrypto
+redis
+simplejson

tests/test_websocketproxy.py

@@ -20,32 +20,20 @@ import sys
 import unittest
 import unittest
 import socket
-try:
-    from mock import patch
-except ImportError:
-    from unittest.mock import patch
+from io import StringIO
+from io import BytesIO
+from unittest.mock import patch
+
+from jwcrypto import jwt
 
 from websockify import websocketproxy
 from websockify import token_plugins
 from websockify import auth_plugins
 
-if sys.version_info >= (2,7):
-    from jwcrypto import jwt
-
-try:
-    from StringIO import StringIO
-    BytesIO = StringIO
-except ImportError:
-    from io import StringIO
-    from io import BytesIO
-
 
 class FakeSocket(object):
-    def __init__(self, data=''):
-        if isinstance(data, bytes):
-            self._data = data
-        else:
-            self._data = data.encode('latin_1')
+    def __init__(self, data=b''):
+        self._data = data
 
     def recv(self, amt, flags=None):
         res = self._data[0:amt]
@@ -76,7 +64,7 @@ class ProxyRequestHandlerTestCase(unittest.TestCase):
     def setUp(self):
         super(ProxyRequestHandlerTestCase, self).setUp()
         self.handler = websocketproxy.ProxyRequestHandler(
-            FakeSocket(''), "127.0.0.1", FakeServer())
+            FakeSocket(), "127.0.0.1", FakeServer())
         self.handler.path = "https://localhost:6080/websockify?token=blah"
         self.handler.headers = None
         patch('websockify.websockifyserver.WebSockifyServer.socket').start()

tests/test_websockifyserver.py

@@ -22,42 +22,26 @@ import select
 import shutil
 import socket
 import ssl
-try:
-    from mock import patch, MagicMock, ANY
-except ImportError:
-    from unittest.mock import patch, MagicMock, ANY
+from unittest.mock import patch, MagicMock, ANY
 import sys
 import tempfile
 import unittest
 import socket
 import signal
+from http.server import BaseHTTPRequestHandler
+from io import StringIO
+from io import BytesIO
+
 from websockify import websockifyserver
 
-try:
-    from BaseHTTPServer import BaseHTTPRequestHandler
-except ImportError:
-    from http.server import BaseHTTPRequestHandler
-
-try:
-    from StringIO import StringIO
-    BytesIO = StringIO
-except ImportError:
-    from io import StringIO
-    from io import BytesIO
-
-
-
 
 def raise_oserror(*args, **kwargs):
     raise OSError('fake error')
 
 
 class FakeSocket(object):
-    def __init__(self, data=''):
-        if isinstance(data, bytes):
-            self._data = data
-        else:
-            self._data = data.encode('latin_1')
+    def __init__(self, data=b''):
+        self._data = data
 
     def recv(self, amt, flags=None):
         res = self._data[0:amt]
@@ -99,7 +83,7 @@ class WebSockifyRequestHandlerTestCase(unittest.TestCase):
     def test_normal_get_with_only_upgrade_returns_error(self, send_error):
         server = self._get_server(web=None)
         handler = websockifyserver.WebSockifyRequestHandler(
-            FakeSocket('GET /tmp.txt HTTP/1.1'), '127.0.0.1', server)
+            FakeSocket(b'GET /tmp.txt HTTP/1.1'), '127.0.0.1', server)
 
         handler.do_GET()
         send_error.assert_called_with(405, ANY)
@@ -108,7 +92,7 @@ class WebSockifyRequestHandlerTestCase(unittest.TestCase):
     def test_list_dir_with_file_only_returns_error(self, send_error):
         server = self._get_server(file_only=True)
         handler = websockifyserver.WebSockifyRequestHandler(
-            FakeSocket('GET / HTTP/1.1'), '127.0.0.1', server)
+            FakeSocket(b'GET / HTTP/1.1'), '127.0.0.1', server)
 
         handler.path = '/'
         handler.do_GET()
@@ -186,7 +170,7 @@ class WebSockifyServerTestCase(unittest.TestCase):
     def test_handshake_ssl_only_without_ssl_raises_error(self):
         server = self._get_server(daemon=True, ssl_only=1, idle_timeout=1)
 
-        sock = FakeSocket('some initial data')
+        sock = FakeSocket(b'some initial data')
 
         def fake_select(rlist, wlist, xlist, timeout=None):
             return ([sock], [], [])
@@ -208,7 +192,7 @@ class WebSockifyServerTestCase(unittest.TestCase):
             handler_class=FakeHandler, daemon=True,
             ssl_only=0, idle_timeout=1)
 
-        sock = FakeSocket('some initial data')
+        sock = FakeSocket(b'some initial data')
 
         def fake_select(rlist, wlist, xlist, timeout=None):
             return ([sock], [], [])
@@ -229,7 +213,7 @@ class WebSockifyServerTestCase(unittest.TestCase):
         server = self._get_server(daemon=True, ssl_only=0, idle_timeout=1,
                                   cert='afdsfasdafdsafdsafdsafdas')
 
-        sock = FakeSocket("\x16some ssl data")
+        sock = FakeSocket(b"\x16some ssl data")
 
         def fake_select(rlist, wlist, xlist, timeout=None):
             return ([sock], [], [])
@@ -242,7 +226,7 @@ class WebSockifyServerTestCase(unittest.TestCase):
     def test_do_handshake_ssl_error_eof_raises_close_error(self):
         server = self._get_server(daemon=True, ssl_only=0, idle_timeout=1)
 
-        sock = FakeSocket("\x16some ssl data")
+        sock = FakeSocket(b"\x16some ssl data")
 
         def fake_select(rlist, wlist, xlist, timeout=None):
             return ([sock], [], [])
@@ -264,12 +248,7 @@ class WebSockifyServerTestCase(unittest.TestCase):
                 raise ssl.SSLError(ssl.SSL_ERROR_EOF)
 
         patch('select.select').start().side_effect = fake_select
-        if (hasattr(ssl, 'create_default_context')):
-            # for recent versions of python
-            patch('ssl.create_default_context').start().side_effect = fake_create_default_context
-        else:
-            # for fallback for old versions of python
-            patch('ssl.warp_socket').start().side_effect = fake_wrap_socket
+        patch('ssl.create_default_context').start().side_effect = fake_create_default_context
         self.assertRaises(
             websockifyserver.WebSockifyServer.EClose, server.do_handshake,
             sock, '127.0.0.1')
@@ -283,7 +262,7 @@ class WebSockifyServerTestCase(unittest.TestCase):
 
         server = self._get_server(handler_class=FakeHandler, daemon=True, 
                                   idle_timeout=1, ssl_ciphers=test_ciphers)
-        sock = FakeSocket("\x16some ssl data")
+        sock = FakeSocket(b"\x16some ssl data")
 
         def fake_select(rlist, wlist, xlist, timeout=None):
             return ([sock], [], [])
@@ -305,15 +284,9 @@ class WebSockifyServerTestCase(unittest.TestCase):
                 fake_create_default_context.CIPHERS = ciphers_to_set
 
         patch('select.select').start().side_effect = fake_select
-        if (hasattr(ssl, 'create_default_context')):
-            # for recent versions of python
-            patch('ssl.create_default_context').start().side_effect = fake_create_default_context
-            server.do_handshake(sock, '127.0.0.1')
-            self.assertEqual(fake_create_default_context.CIPHERS, test_ciphers)
-        else:
-            # for fallback for old versions of python
-            # not supperted, nothing to test
-            pass
+        patch('ssl.create_default_context').start().side_effect = fake_create_default_context
+        server.do_handshake(sock, '127.0.0.1')
+        self.assertEqual(fake_create_default_context.CIPHERS, test_ciphers)
 
     def test_do_handshake_ssl_sets_opions(self):
         test_options = 0xCAFEBEEF
@@ -324,7 +297,7 @@ class WebSockifyServerTestCase(unittest.TestCase):
 
         server = self._get_server(handler_class=FakeHandler, daemon=True, 
                                   idle_timeout=1, ssl_options=test_options)
-        sock = FakeSocket("\x16some ssl data")
+        sock = FakeSocket(b"\x16some ssl data")
 
         def fake_select(rlist, wlist, xlist, timeout=None):
             return ([sock], [], [])
@@ -349,15 +322,9 @@ class WebSockifyServerTestCase(unittest.TestCase):
             options = property(get_options, set_options)
 
         patch('select.select').start().side_effect = fake_select
-        if (hasattr(ssl, 'create_default_context')):
-            # for recent versions of python
-            patch('ssl.create_default_context').start().side_effect = fake_create_default_context
-            server.do_handshake(sock, '127.0.0.1')
-            self.assertEqual(fake_create_default_context.OPTIONS, test_options)
-        else:
-            # for fallback for old versions of python
-            # not supperted, nothing to test
-            pass
+        patch('ssl.create_default_context').start().side_effect = fake_create_default_context
+        server.do_handshake(sock, '127.0.0.1')
+        self.assertEqual(fake_create_default_context.OPTIONS, test_options)
 
     def test_fallback_sigchld_handler(self):
         # TODO(directxman12): implement this

tox.ini

@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py24,py26,py27,py33,py34
+envlist = py34
 
 [testenv]
 commands = nosetests {posargs}

websockify/auth_plugins.py

@@ -1,4 +1,4 @@
-class BasePlugin(object):
+class BasePlugin():
     def __init__(self, src=None):
         self.source = src
 
@@ -15,7 +15,7 @@ class AuthenticationError(Exception):
         if log_msg is None:
             log_msg = response_msg
 
-        super(AuthenticationError, self).__init__('%s %s' % (self.code, log_msg))
+        super().__init__('%s %s' % (self.code, log_msg))
 
 
 class InvalidOriginError(AuthenticationError):
@@ -23,13 +23,13 @@ class InvalidOriginError(AuthenticationError):
         self.expected_origin = expected
         self.actual_origin = actual
 
-        super(InvalidOriginError, self).__init__(
+        super().__init__(
             response_msg='Invalid Origin',
             log_msg="Invalid Origin Header: Expected one of "
                     "%s, got '%s'" % (expected, actual))
 
 
-class BasicHTTPAuth(object):
+class BasicHTTPAuth():
     """Verifies Basic Auth headers. Specify src as username:password"""
 
     def __init__(self, src=None):
@@ -76,7 +76,7 @@ class BasicHTTPAuth(object):
         raise AuthenticationError(response_code=401,
                                   response_headers={'WWW-Authenticate': 'Basic realm="Websockify"'})
 
-class ExpectOrigin(object):
+class ExpectOrigin():
     def __init__(self, src=None):
         if src is None:
             self.source = []
@@ -88,7 +88,7 @@ class ExpectOrigin(object):
         if origin is None or origin not in self.source:
             raise InvalidOriginError(expected=self.source, actual=origin)
 
-class ClientCertCNAuth(object):
+class ClientCertCNAuth():
     """Verifies client by SSL certificate. Specify src as whitespace separated list of common names."""
 
     def __init__(self, src=None):

websockify/sysloghandler.py

@@ -44,7 +44,7 @@ class WebsockifySysLogHandler(handlers.SysLogHandler):
             self._legacy = True
             self._head_fmt = self._legacy_head_fmt
 
-        handlers.SysLogHandler.__init__(self, address, facility, socktype)
+        super().__init__(address, facility, socktype)
 
 
     def emit(self, record):

websockify/token_plugins.py

@@ -1,8 +1,7 @@
-from __future__ import print_function
 import os
 import sys
 
-class BasePlugin(object):
+class BasePlugin():
     def __init__(self, src):
         self.source = src
 
@@ -15,7 +14,7 @@ class ReadOnlyTokenFile(BasePlugin):
     #   token: host:port
     # or a directory of such files
     def __init__(self, *args, **kwargs):
-        super(ReadOnlyTokenFile, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
         self._targets = None
 
     def _load_targets(self):
@@ -57,7 +56,7 @@ class TokenFile(ReadOnlyTokenFile):
     def lookup(self, token):
         self._load_targets()
 
-        return super(TokenFile, self).lookup(token)
+        return super().lookup(token)
 
 
 class BaseTokenAPI(BasePlugin):
@@ -137,7 +136,7 @@ class JWTTokenApi(BasePlugin):
             print("package jwcrypto not found, are you sure you've installed it correctly?", file=sys.stderr)
             return None
 
-class TokenRedis(object):
+class TokenRedis():
     def __init__(self, src):
         self._server, self._port = src.split(":")
 
@@ -162,7 +161,7 @@ class TokenRedis(object):
 
 class UnixDomainSocketDirectory(BasePlugin):
     def __init__(self, *args, **kwargs):
-        super(UnixDomainSocketDirectory, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
         self._dir_path = os.path.abspath(self.source)
 
     def lookup(self, token):

websockify/websocket.py

@@ -22,6 +22,7 @@ import ssl
 import struct
 from base64 import b64encode
 from hashlib import sha1
+from urllib.parse import urlparse
 
 try:
     import numpy
@@ -30,25 +31,10 @@ except ImportError:
     warnings.warn("no 'numpy' module, HyBi protocol will be slower")
     numpy = None
 
-# python 3.0 differences
-try:
-    from urllib.parse import urlparse
-except ImportError:
-    from urlparse import urlparse
-
-# SSLWant*Error is 2.7.9+
-try:
-    class WebSocketWantReadError(ssl.SSLWantReadError):
-        pass
-    class WebSocketWantWriteError(ssl.SSLWantWriteError):
-        pass
-except AttributeError:
-    class WebSocketWantReadError(OSError):
-        def __init__(self):
-            OSError.__init__(self, errno.EWOULDBLOCK)
-    class WebSocketWantWriteError(OSError):
-        def __init__(self):
-            OSError.__init__(self, errno.EWOULDBLOCK)
+class WebSocketWantReadError(ssl.SSLWantReadError):
+    pass
+class WebSocketWantWriteError(ssl.SSLWantWriteError):
+    pass
 
 class WebSocket(object):
     """WebSocket protocol socket like class.
@@ -87,11 +73,11 @@ class WebSocket(object):
 
         self._state = "new"
 
-        self._partial_msg = ''.encode("ascii")
+        self._partial_msg = b''
 
-        self._recv_buffer = ''.encode("ascii")
+        self._recv_buffer = b''
         self._recv_queue = []
-        self._send_buffer = ''.encode("ascii")
+        self._send_buffer = b''
 
         self._previous_sendmsg = None
 
@@ -166,9 +152,7 @@ class WebSocket(object):
             self._key = ''
             for i in range(16):
                 self._key += chr(random.randrange(256))
-            if sys.hexversion >= 0x3000000:
-                self._key = bytes(self._key, "latin-1")
-            self._key = b64encode(self._key).decode("ascii")
+            self._key = b64encode(self._key.encode("latin-1")).decode("ascii")
 
             path = uri.path
             if not path:
@@ -198,10 +182,10 @@ class WebSocket(object):
             if not self._recv():
                 raise Exception("Socket closed unexpectedly")
 
-            if self._recv_buffer.find('\r\n\r\n'.encode("ascii")) == -1:
+            if self._recv_buffer.find(b'\r\n\r\n') == -1:
                 raise WebSocketWantReadError
 
-            (request, self._recv_buffer) = self._recv_buffer.split('\r\n'.encode("ascii"), 1)
+            (request, self._recv_buffer) = self._recv_buffer.split(b'\r\n', 1)
             request = request.decode("latin-1")
 
             words = request.split()
@@ -210,7 +194,7 @@ class WebSocket(object):
             if words[1] != "101":
                 raise Exception("WebSocket request denied: %s" % " ".join(words[1:]))
 
-            (headers, self._recv_buffer) = self._recv_buffer.split('\r\n\r\n'.encode("ascii"), 1)
+            (headers, self._recv_buffer) = self._recv_buffer.split(b'\r\n\r\n', 1)
             headers = headers.decode('latin-1') + '\r\n'
             headers = email.message_from_string(headers)
 
@@ -463,7 +447,7 @@ class WebSocket(object):
 
         return len(msg)
 
-    def ping(self, data=''.encode('ascii')):
+    def ping(self, data=b''):
         """Write a ping message to the WebSocket
 
         WebSocketWantWriteError can be raised if there is insufficient
@@ -488,7 +472,7 @@ class WebSocket(object):
             self._previous_sendmsg = data
             raise
 
-    def pong(self, data=''.encode('ascii')):
+    def pong(self, data=b''):
         """Write a pong message to the WebSocket
 
         WebSocketWantWriteError can be raised if there is insufficient
@@ -542,7 +526,7 @@ class WebSocket(object):
 
         self._sent_close = True
 
-        msg = ''.encode('ascii')
+        msg = b''
         if code is not None:
             msg += struct.pack(">H", code)
             if reason is not None:
@@ -571,16 +555,9 @@ class WebSocket(object):
         while True:
             try:
                 data = self.socket.recv(4096)
-            except (socket.error, OSError):
-                exc = sys.exc_info()[1]
-                if hasattr(exc, 'errno'):
-                    err = exc.errno
-                else:
-                    err = exc[0]
-
-                if err == errno.EWOULDBLOCK:
+            except OSError as exc:
+                if exc.errno == errno.EWOULDBLOCK:
                     raise WebSocketWantReadError
-
                 raise
 
             if len(data) == 0:
@@ -637,7 +614,7 @@ class WebSocket(object):
 
                 if frame["fin"]:
                     msg = self._partial_msg
-                    self._partial_msg = ''.encode("ascii")
+                    self._partial_msg = b''
                     return msg
             elif frame["opcode"] == 0x1:
                 self.shutdown(socket.SHUT_RDWR, 1003, "Unsupported: Text frames are not supported")
@@ -712,16 +689,9 @@ class WebSocket(object):
 
         try:
             sent = self.socket.send(self._send_buffer)
-        except (socket.error, OSError):
-            exc = sys.exc_info()[1]
-            if hasattr(exc, 'errno'):
-                err = exc.errno
-            else:
-                err = exc[0]
-
-            if err == errno.EWOULDBLOCK:
+        except OSError as exc:
+            if exc.errno == errno.EWOULDBLOCK:
                 raise WebSocketWantWriteError
-
             raise
 
         self._send_buffer = self._send_buffer[sent:]
@@ -747,11 +717,9 @@ class WebSocket(object):
     def _sendmsg(self, opcode, msg):
         # Sends a standard data message
         if self.client:
-            mask = ''
+            mask = b''
             for i in range(4):
-                mask += chr(random.randrange(256))
-            if sys.hexversion >= 0x3000000:
-                mask = bytes(mask, "latin-1")
+                mask += random.randrange(256)
             frame = self._encode_hybi(opcode, msg, mask)
         else:
             frame = self._encode_hybi(opcode, msg)
@@ -773,7 +741,7 @@ class WebSocket(object):
             plen = len(buf)
             pstart = 0
             pend = plen
-            b = c = ''.encode('ascii')
+            b = c = b''
             if plen >= 4:
                 dtype=numpy.dtype('<u4')
                 if sys.byteorder == 'big':
@@ -794,8 +762,6 @@ class WebSocket(object):
             return b + c
         else:
             # Slower fallback
-            if sys.hexversion < 0x3000000:
-                mask = [ ord(c) for c in mask ]
             data = array.array('B')
             data.fromstring(buf)
             for i in range(len(data)):

websockify/websocketproxy.py

@@ -12,24 +12,13 @@ as taken from http://docs.python.org/dev/library/ssl.html#certificates
 '''
 
 import signal, socket, optparse, time, os, sys, subprocess, logging, errno, ssl
-try:
-    from socketserver import ThreadingMixIn
-except ImportError:
-    from SocketServer import ThreadingMixIn
-
-try:
-    from http.server import HTTPServer
-except ImportError:
-    from BaseHTTPServer import HTTPServer
+from socketserver import ThreadingMixIn
+from http.server import HTTPServer
 
 import select
 from websockify import websockifyserver
 from websockify import auth_plugins as auth
-try:
-    from urllib.parse import parse_qs, urlparse
-except ImportError:
-    from cgi import parse_qs
-    from urlparse import urlparse
+from urllib.parse import parse_qs, urlparse
 
 class ProxyRequestHandler(websockifyserver.WebSockifyRequestHandler):
 
@@ -319,7 +308,7 @@ class WebSocketProxy(websockifyserver.WebSockifyServer):
                 "REBIND_OLD_PORT": str(kwargs['listen_port']),
                 "REBIND_NEW_PORT": str(self.target_port)})
 
-        websockifyserver.WebSockifyServer.__init__(self, RequestHandlerClass, *args, **kwargs)
+        super().__init__(RequestHandlerClass, *args, **kwargs)
 
     def run_wrap_cmd(self):
         self.msg("Starting '%s'", " ".join(self.wrap_cmd))
@@ -395,35 +384,15 @@ def _subprocess_setup():
     signal.signal(signal.SIGPIPE, signal.SIG_DFL)
 
 
-try :
-    # First try SSL options for Python 3.4 and above
-    SSL_OPTIONS = {
-        'default': ssl.OP_ALL,
-        'tlsv1_1': ssl.PROTOCOL_TLS | ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3 |
-        ssl.OP_NO_TLSv1,
-        'tlsv1_2': ssl.PROTOCOL_TLS | ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3 |
-        ssl.OP_NO_TLSv1 | ssl.OP_NO_TLSv1_1,
-        'tlsv1_3': ssl.PROTOCOL_TLS | ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3 |
-        ssl.OP_NO_TLSv1 | ssl.OP_NO_TLSv1_1 | ssl.OP_NO_TLSv1_2,
-    }
-except AttributeError:
-    try:
-        # Python 3.3 uses a different scheme for SSL options
-        # tlsv1_3 is not supported on older Python versions
-        SSL_OPTIONS = {
-            'default': ssl.OP_ALL,
-            'tlsv1_1': ssl.PROTOCOL_TLSv1 | ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3 |
-            ssl.OP_NO_TLSv1,
-            'tlsv1_2': ssl.PROTOCOL_TLSv1 | ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3 |
-            ssl.OP_NO_TLSv1 | ssl.OP_NO_TLSv1_1,
-        }
-    except AttributeError:
-        # Python 2.6 does not support TLS v1.2, and uses a different scheme
-        # for SSL options
-        SSL_OPTIONS = {
-            'default': ssl.PROTOCOL_SSLv23,
-            'tlsv1_1': ssl.PROTOCOL_TLSv1,
-        }
+SSL_OPTIONS = {
+    'default': ssl.OP_ALL,
+    'tlsv1_1': ssl.PROTOCOL_TLS | ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3 |
+    ssl.OP_NO_TLSv1,
+    'tlsv1_2': ssl.PROTOCOL_TLS | ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3 |
+    ssl.OP_NO_TLSv1 | ssl.OP_NO_TLSv1_1,
+    'tlsv1_3': ssl.PROTOCOL_TLS | ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3 |
+    ssl.OP_NO_TLSv1 | ssl.OP_NO_TLSv1_1 | ssl.OP_NO_TLSv1_2,
+}
 
 def select_ssl_version(version):
     """Returns SSL options for the most secure TSL version available on this
@@ -769,14 +738,13 @@ class LibProxyServer(ThreadingMixIn, HTTPServer):
         if web:
             os.chdir(web)
 
-        HTTPServer.__init__(self, (listen_host, listen_port),
-                            RequestHandlerClass)
+        super().__init__((listen_host, listen_port), RequestHandlerClass)
 
 
     def process_request(self, request, client_address):
         """Override process_request to implement a counter"""
         self.handler_id += 1
-        ThreadingMixIn.process_request(self, request, client_address)
+        super().process_request(request, client_address)
 
 
 if __name__ == '__main__':

websockify/websocketserver.py

@@ -8,12 +8,7 @@ Licensed under LGPL version 3 (see docs/LICENSE.LGPL-3)
 '''
 
 import sys
-
-# python 3.0 differences
-try:
-    from http.server import BaseHTTPRequestHandler, HTTPServer
-except ImportError:
-    from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer
+from http.server import BaseHTTPRequestHandler, HTTPServer
 
 from websockify.websocket import WebSocket, WebSocketWantReadError, WebSocketWantWriteError
 
@@ -42,12 +37,7 @@ class WebSocketRequestHandlerMixIn:
         self._real_do_GET = self.do_GET
         self.do_GET = self._websocket_do_GET
         try:
-            # super() only works for new style classes
-            if issubclass(WebSocketRequestHandlerMixIn, object):
-                super(WebSocketRequestHandlerMixIn, self).handle_one_request()
-            else:
-                # Assume handle_one_request() hasn't been overriden
-                BaseHTTPRequestHandler.handle_one_request(self)
+            super().handle_one_request()
         finally:
             self.do_GET = self._real_do_GET
 

websockify/websockifyserver.py

@@ -14,19 +14,7 @@ as taken from http://docs.python.org/dev/library/ssl.html#certificates
 
 import os, sys, time, errno, signal, socket, select, logging
 import multiprocessing
-
-# Imports that vary by python version
-
-# python 3.0 differences
-if sys.hexversion > 0x3000000:
-    s2b = lambda s: s.encode('latin_1')
-else:
-    s2b = lambda s: s      # No-op
-
-try:
-    from http.server import SimpleHTTPRequestHandler
-except ImportError:
-    from SimpleHTTPServer import SimpleHTTPRequestHandler
+from http.server import SimpleHTTPRequestHandler
 
 # Degraded functionality if these imports are missing
 for mod, msg in [('ssl', 'TLS/SSL/wss is disabled'),
@@ -96,7 +84,7 @@ class WebSockifyRequestHandler(WebSocketRequestHandlerMixIn, SimpleHTTPRequestHa
         if self.logger is None:
             self.logger = WebSockifyServer.get_logger()
 
-        SimpleHTTPRequestHandler.__init__(self, req, addr, server)
+        super().__init__(req, addr, server)
 
     def log_message(self, format, *args):
         self.logger.info("%s - - [%s] %s" % (self.client_address[0], self.log_date_time_string(), format % args))
@@ -212,7 +200,7 @@ class WebSockifyRequestHandler(WebSocketRequestHandlerMixIn, SimpleHTTPRequestHa
         self.validate_connection()
         self.auth_connection()
 
-        WebSocketRequestHandlerMixIn.handle_upgrade(self)
+        super().handle_upgrade()
 
     def handle_websocket(self):
         # Indicate to server that a Websocket upgrade was done
@@ -264,13 +252,13 @@ class WebSockifyRequestHandler(WebSocketRequestHandlerMixIn, SimpleHTTPRequestHa
         if self.only_upgrade:
             self.send_error(405, "Method Not Allowed")
         else:
-            SimpleHTTPRequestHandler.do_GET(self)
+            super().do_GET()
 
     def list_directory(self, path):
         if self.file_only:
             self.send_error(404, "No such file")
         else:
-            return SimpleHTTPRequestHandler.list_directory(self, path)
+            return super().list_directory(path)
 
     def new_websocket_client(self):
         """ Do something with a WebSockets client connection. """
@@ -291,13 +279,13 @@ class WebSockifyRequestHandler(WebSocketRequestHandlerMixIn, SimpleHTTPRequestHa
         if self.only_upgrade:
             self.send_error(405, "Method Not Allowed")
         else:
-            SimpleHTTPRequestHandler.do_HEAD(self)
+            super().do_HEAD()
 
     def finish(self):
         if self.rec:
             self.rec.write("'EOF'];\n")
             self.rec.close()
-        SimpleHTTPRequestHandler.finish(self)
+        super().finish()
 
     def handle(self):
         # When using run_once, we have a single process, so
@@ -306,14 +294,14 @@ class WebSockifyRequestHandler(WebSocketRequestHandlerMixIn, SimpleHTTPRequestHa
         if self.run_once:
             self.handle_one_request()
         else:
-            SimpleHTTPRequestHandler.handle(self)
+            super().handle()
 
     def log_request(self, code='-', size='-'):
         if self.verbose:
-            SimpleHTTPRequestHandler.log_request(self, code, size)
+            super().log_request(code, size)
 
 
-class WebSockifyServer(object):
+class WebSockifyServer():
     """
     WebSockets server class.
     As an alternative, the standard library SocketServer can be used
@@ -553,7 +541,7 @@ class WebSockifyServer(object):
         if not handshake:
             raise self.EClose("")
 
-        elif handshake[0] in ("\x16", "\x80", 22, 128):
+        elif handshake[0] in (22, 128):
             # SSL wrap the connection
             if not ssl:
                 raise self.EClose("SSL connection but no 'ssl' module")
@@ -562,32 +550,21 @@ class WebSockifyServer(object):
                                   % self.cert)
             retsock = None
             try:
-                if (hasattr(ssl, 'create_default_context') 
-                    and callable(ssl.create_default_context)):
-                    # create new-style SSL wrapping for extended features
-                    context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
-                    if self.ssl_ciphers is not None:
-                        context.set_ciphers(self.ssl_ciphers)
-                    context.options = self.ssl_options
-                    context.load_cert_chain(certfile=self.cert, keyfile=self.key, password=self.key_password)
-                    if self.verify_client:
-                        context.verify_mode = ssl.CERT_REQUIRED
-                        if self.cafile:
-                            context.load_verify_locations(cafile=self.cafile)
-                        else:
-                            context.set_default_verify_paths()
-                    retsock = context.wrap_socket(
-                            sock,
-                            server_side=True)
-                else:
-                    if self.verify_client:
-                        raise self.EClose("Client certificate verification requested, but this Python is too old.")
-                    # new-style SSL wrapping is not needed, using to old style
-                    retsock = ssl.wrap_socket(
-                            sock,
-                            server_side=True,
-                            certfile=self.cert,
-                            keyfile=self.key)
+                # create new-style SSL wrapping for extended features
+                context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH)
+                if self.ssl_ciphers is not None:
+                    context.set_ciphers(self.ssl_ciphers)
+                context.options = self.ssl_options
+                context.load_cert_chain(certfile=self.cert, keyfile=self.key, password=self.key_password)
+                if self.verify_client:
+                    context.verify_mode = ssl.CERT_REQUIRED
+                    if self.cafile:
+                        context.load_verify_locations(cafile=self.cafile)
+                    else:
+                        context.set_default_verify_paths()
+                retsock = context.wrap_socket(
+                        sock,
+                        server_side=True)
             except ssl.SSLError:
                 _, x, _ = sys.exc_info()
                 if x.args[0] == ssl.SSL_ERROR_EOF:
@@ -723,10 +700,6 @@ class WebSockifyServer(object):
 
         if self.listen_fd != None:
             lsock = socket.fromfd(self.listen_fd, socket.AF_INET, socket.SOCK_STREAM)
-            if sys.hexversion < 0x3000000:
-                # For python 2 we have to wrap the "raw" socket into a socket object,
-                # otherwise ssl wrap_socket doesn't work.
-                lsock = socket.socket(_sock=lsock)
         else:
             lsock = self.socket(self.listen_host, self.listen_port, False,
                                 self.prefer_ipv6,