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"""Tests for http/websocket.py"""
import base64
import hashlib
import os
from unittest import mock
import multidict
import pytest
from aiohttp import errors, protocol
from aiohttp._ws_impl import WS_KEY, do_handshake
@pytest.fixture()
def transport():
return mock.Mock()
@pytest.fixture()
def message():
headers = multidict.MultiDict()
return protocol.RawRequestMessage(
'GET', '/path', (1, 0), headers, [], True, None)
def gen_ws_headers(protocols=''):
key = base64.b64encode(os.urandom(16)).decode()
hdrs = [('Upgrade', 'websocket'),
('Connection', 'upgrade'),
('Sec-Websocket-Version', '13'),
('Sec-Websocket-Key', key)]
if protocols:
hdrs += [('Sec-Websocket-Protocol', protocols)]
return hdrs, key
def test_not_get(message, transport):
with pytest.raises(errors.HttpProcessingError):
do_handshake('POST', message.headers, transport)
def test_no_upgrade(message, transport):
with pytest.raises(errors.HttpBadRequest):
do_handshake(message.method, message.headers, transport)
def test_no_connection(message, transport):
message.headers.extend([('Upgrade', 'websocket'),
('Connection', 'keep-alive')])
with pytest.raises(errors.HttpBadRequest):
do_handshake(message.method, message.headers, transport)
def test_protocol_version(message, transport):
message.headers.extend([('Upgrade', 'websocket'),
('Connection', 'upgrade')])
with pytest.raises(errors.HttpBadRequest):
do_handshake(message.method, message.headers, transport)
message.headers.extend([('Upgrade', 'websocket'),
('Connection', 'upgrade'),
('Sec-Websocket-Version', '1')])
with pytest.raises(errors.HttpBadRequest):
do_handshake(message.method, message.headers, transport)
def test_protocol_key(message, transport):
message.headers.extend([('Upgrade', 'websocket'),
('Connection', 'upgrade'),
('Sec-Websocket-Version', '13')])
with pytest.raises(errors.HttpBadRequest):
do_handshake(message.method, message.headers, transport)
message.headers.extend([('Upgrade', 'websocket'),
('Connection', 'upgrade'),
('Sec-Websocket-Version', '13'),
('Sec-Websocket-Key', '123')])
with pytest.raises(errors.HttpBadRequest):
do_handshake(message.method, message.headers, transport)
sec_key = base64.b64encode(os.urandom(2))
message.headers.extend([('Upgrade', 'websocket'),
('Connection', 'upgrade'),
('Sec-Websocket-Version', '13'),
('Sec-Websocket-Key', sec_key.decode())])
with pytest.raises(errors.HttpBadRequest):
do_handshake(message.method, message.headers, transport)
def test_handshake(message, transport):
hdrs, sec_key = gen_ws_headers()
message.headers.extend(hdrs)
status, headers, parser, writer, protocol = do_handshake(
message.method, message.headers, transport)
assert status == 101
assert protocol is None
key = base64.b64encode(
hashlib.sha1(sec_key.encode() + WS_KEY).digest())
headers = dict(headers)
assert headers['Sec-Websocket-Accept'] == key.decode()
def test_handshake_protocol(message, transport):
'''Tests if one protocol is returned by do_handshake'''
proto = 'chat'
message.headers.extend(gen_ws_headers(proto)[0])
_, resp_headers, _, _, protocol = do_handshake(
message.method, message.headers, transport,
protocols=[proto])
assert protocol == proto
# also test if we reply with the protocol
resp_headers = dict(resp_headers)
assert resp_headers['Sec-Websocket-Protocol'] == proto
def test_handshake_protocol_agreement(message, transport):
'''Tests if the right protocol is selected given multiple'''
best_proto = 'worse_proto'
wanted_protos = ['best', 'chat', 'worse_proto']
server_protos = 'worse_proto,chat'
message.headers.extend(gen_ws_headers(server_protos)[0])
_, resp_headers, _, _, protocol = do_handshake(
message.method, message.headers, transport,
protocols=wanted_protos)
assert protocol == best_proto
def test_handshake_protocol_unsupported(log, message, transport):
'''Tests if a protocol mismatch handshake warns and returns None'''
proto = 'chat'
message.headers.extend(gen_ws_headers('test')[0])
with log('aiohttp.websocket') as ctx:
_, _, _, _, protocol = do_handshake(
message.method, message.headers, transport,
protocols=[proto])
assert protocol is None
assert (ctx.records[-1].msg ==
'Client protocols %r don’t overlap server-known ones %r')
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