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Handle continuation frames with non-zero opcodes

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This commit is contained in:
Kovid Goyal 2015-10-26 00:17:38 +05:30
parent 89c6f163f6
commit 888ff441c5
2 changed files with 37 additions and 7 deletions
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40
src/calibre/srv/tests/web_sockets.py
View File

@ -13,7 +13,7 @@ from hashlib import sha1
from calibre.srv.tests.base import BaseTest, TestServer
from calibre.srv.web_socket import (
GUID_STR, BINARY, TEXT, MessageWriter, create_frame, CLOSE, NORMAL_CLOSE,
PING, PONG, PROTOCOL_ERROR)
PING, PONG, PROTOCOL_ERROR, CONTINUATION)
from calibre.utils.monotonic import monotonic
from calibre.utils.socket_inheritance import set_socket_inherit
@ -201,6 +201,8 @@ class WebSocketTest(BaseTest):
client.write_frame(**msg)
else:
client.write_message(msg)
ordered = not isinstance(expected, (set, frozenset))
pexpected, replies = set(), set()
for ex in expected:
if isinstance(ex, type('')):
ex = TEXT, ex
@ -208,7 +210,12 @@ class WebSocketTest(BaseTest):
ex = BINARY, ex
elif isinstance(ex, int):
ex = ex, b''
self.ae(ex, client.read_message())
if ordered:
self.ae(ex, client.read_message())
else:
pexpected.add(ex), replies.add(client.read_message())
if not ordered:
self.ae(pexpected, replies)
if send_close:
client.write_close(close_code, close_reason)
opcode, data = client.read_message()
@ -235,6 +242,8 @@ class WebSocketTest(BaseTest):
for payload in (b'', b'pong'):
simple_test([(PONG, payload)], [])
fragments = 'frag1 frag2'.split()
with server.silence_log:
for rsv in xrange(1, 7):
simple_test([{'rsv':rsv, 'opcode':BINARY}], [], close_code=PROTOCOL_ERROR, send_close=False)
@ -246,13 +255,30 @@ class WebSocketTest(BaseTest):
{'opcode':opcode, 'payload':'f1', 'fin':0}, {'opcode':opcode, 'payload':'f2'}
], close_code=PROTOCOL_ERROR, send_close=False)
simple_test([{'opcode':0, 'payload':b'non-continuation frame'}, 'some text'], close_code=PROTOCOL_ERROR, send_close=False)
for fin in (0, 1):
simple_test([{'opcode':0, 'fin': fin, 'payload':b'non-continuation frame'}, 'some text'], close_code=PROTOCOL_ERROR, send_close=False)
simple_test([
{'opcode':TEXT, 'payload':fragments[0], 'fin':0}, {'opcode':CONTINUATION, 'payload':fragments[1]}, {'opcode':0, 'fin':0}
], [''.join(fragments)], close_code=PROTOCOL_ERROR, send_close=False)
simple_test([
{'opcode':TEXT, 'payload':fragments[0], 'fin':0}, {'opcode':TEXT, 'payload':fragments[1]},
], close_code=PROTOCOL_ERROR, send_close=False)
fragments = 'frag1 frag2'.split()
simple_test([
{'opcode':TEXT, 'payload':fragments[0], 'fin':0}, {'opcode':TEXT, 'payload':fragments[1]}
{'opcode':TEXT, 'payload':fragments[0], 'fin':0}, {'opcode':CONTINUATION, 'payload':fragments[1]}
], [''.join(fragments)])
simple_test([
{'opcode':TEXT, 'payload':fragments[0], 'fin':0}, (PING, b'pong'), {'opcode':TEXT, 'payload':fragments[1]}
], [(PONG, b'pong'), ''.join(fragments)])
{'opcode':TEXT, 'payload':fragments[0], 'fin':0}, (PING, b'pong'), {'opcode':CONTINUATION, 'payload':fragments[1]}
], {(PONG, b'pong'), ''.join(fragments)})
fragments = '12345'
simple_test([
{'opcode':TEXT, 'payload':fragments[0], 'fin':0}, {'opcode':CONTINUATION, 'payload':fragments[1], 'fin':0},
(PING, b'1'),
{'opcode':CONTINUATION, 'payload':fragments[2], 'fin':0}, {'opcode':CONTINUATION, 'payload':fragments[3], 'fin':0},
(PING, b'2'),
{'opcode':CONTINUATION, 'payload':fragments[4]}
], {(PONG, b'1'), (PONG, b'2'), fragments})

4
src/calibre/srv/web_socket.py
View File

@ -321,6 +321,10 @@ class WebSocketConnection(HTTPConnection):
self.websocket_close(PROTOCOL_ERROR, 'Continuation frame without any message to continue')
return
self.current_recv_opcode = opcode
elif opcode != CONTINUATION:
self.log.error('Client sent continuation frame with non-zero opcode')
self.websocket_close(PROTOCOL_ERROR, 'Continuation frame with non-zero opcode')
return
message_finished = frame_finished and is_final_frame_of_message
if message_finished:
self.current_recv_opcode = None