mirror of
https://github.com/Grasscutters/mitmproxy.git
synced 2024-11-27 18:31:22 +00:00
268 lines
8.2 KiB
Python
268 lines
8.2 KiB
Python
import os
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from netlib.http.http1 import read_response, read_request
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from netlib import tcp, tutils, websockets, http
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from netlib.http import status_codes
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from netlib.tutils import treq
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from netlib.exceptions import *
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from .. import tservers
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class WebSocketsEchoHandler(tcp.BaseHandler):
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def __init__(self, connection, address, server):
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super(WebSocketsEchoHandler, self).__init__(
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connection, address, server
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)
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self.protocol = websockets.WebsocketsProtocol()
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self.handshake_done = False
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def handle(self):
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while True:
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if not self.handshake_done:
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self.handshake()
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else:
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self.read_next_message()
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def read_next_message(self):
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frame = websockets.Frame.from_file(self.rfile)
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self.on_message(frame.payload)
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def send_message(self, message):
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frame = websockets.Frame.default(message, from_client=False)
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frame.to_file(self.wfile)
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def handshake(self):
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req = read_request(self.rfile)
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key = self.protocol.check_client_handshake(req.headers)
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preamble = 'HTTP/1.1 101 %s' % status_codes.RESPONSES.get(101)
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self.wfile.write(preamble.encode() + b"\r\n")
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headers = self.protocol.server_handshake_headers(key)
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self.wfile.write(str(headers) + "\r\n")
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self.wfile.flush()
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self.handshake_done = True
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def on_message(self, message):
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if message is not None:
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self.send_message(message)
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class WebSocketsClient(tcp.TCPClient):
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def __init__(self, address, source_address=None):
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super(WebSocketsClient, self).__init__(address, source_address)
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self.protocol = websockets.WebsocketsProtocol()
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self.client_nonce = None
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def connect(self):
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super(WebSocketsClient, self).connect()
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preamble = b'GET / HTTP/1.1'
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self.wfile.write(preamble + b"\r\n")
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headers = self.protocol.client_handshake_headers()
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self.client_nonce = headers["sec-websocket-key"].encode("ascii")
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self.wfile.write(bytes(headers) + b"\r\n")
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self.wfile.flush()
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resp = read_response(self.rfile, treq(method="GET"))
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server_nonce = self.protocol.check_server_handshake(resp.headers)
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if not server_nonce == self.protocol.create_server_nonce(self.client_nonce):
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self.close()
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def read_next_message(self):
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return websockets.Frame.from_file(self.rfile).payload
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def send_message(self, message):
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frame = websockets.Frame.default(message, from_client=True)
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frame.to_file(self.wfile)
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class TestWebSockets(tservers.ServerTestBase):
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handler = WebSocketsEchoHandler
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def __init__(self):
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self.protocol = websockets.WebsocketsProtocol()
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def random_bytes(self, n=100):
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return os.urandom(n)
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def echo(self, msg):
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client = WebSocketsClient(("127.0.0.1", self.port))
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client.connect()
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client.send_message(msg)
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response = client.read_next_message()
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assert response == msg
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def test_simple_echo(self):
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self.echo(b"hello I'm the client")
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def test_frame_sizes(self):
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# length can fit in the the 7 bit payload length
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small_msg = self.random_bytes(100)
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# 50kb, sligthly larger than can fit in a 7 bit int
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medium_msg = self.random_bytes(50000)
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# 150kb, slightly larger than can fit in a 16 bit int
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large_msg = self.random_bytes(150000)
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self.echo(small_msg)
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self.echo(medium_msg)
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self.echo(large_msg)
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def test_default_builder(self):
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"""
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default builder should always generate valid frames
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"""
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msg = self.random_bytes()
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client_frame = websockets.Frame.default(msg, from_client=True)
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server_frame = websockets.Frame.default(msg, from_client=False)
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def test_serialization_bijection(self):
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"""
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Ensure that various frame types can be serialized/deserialized back
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and forth between to_bytes() and from_bytes()
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"""
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for is_client in [True, False]:
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for num_bytes in [100, 50000, 150000]:
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frame = websockets.Frame.default(
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self.random_bytes(num_bytes), is_client
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)
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frame2 = websockets.Frame.from_bytes(
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frame.to_bytes()
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)
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assert frame == frame2
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bytes = b'\x81\x03cba'
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assert websockets.Frame.from_bytes(bytes).to_bytes() == bytes
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def test_check_server_handshake(self):
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headers = self.protocol.server_handshake_headers("key")
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assert self.protocol.check_server_handshake(headers)
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headers["Upgrade"] = "not_websocket"
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assert not self.protocol.check_server_handshake(headers)
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def test_check_client_handshake(self):
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headers = self.protocol.client_handshake_headers("key")
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assert self.protocol.check_client_handshake(headers) == "key"
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headers["Upgrade"] = "not_websocket"
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assert not self.protocol.check_client_handshake(headers)
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class BadHandshakeHandler(WebSocketsEchoHandler):
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def handshake(self):
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client_hs = read_request(self.rfile)
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self.protocol.check_client_handshake(client_hs.headers)
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preamble = 'HTTP/1.1 101 %s\r\n' % status_codes.RESPONSES.get(101)
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self.wfile.write(preamble.encode())
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headers = self.protocol.server_handshake_headers(b"malformed key")
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self.wfile.write(bytes(headers) + b"\r\n")
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self.wfile.flush()
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self.handshake_done = True
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class TestBadHandshake(tservers.ServerTestBase):
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"""
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Ensure that the client disconnects if the server handshake is malformed
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"""
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handler = BadHandshakeHandler
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def test(self):
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with tutils.raises(TcpDisconnect):
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client = WebSocketsClient(("127.0.0.1", self.port))
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client.connect()
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client.send_message(b"hello")
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class TestFrameHeader:
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def test_roundtrip(self):
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def round(*args, **kwargs):
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f = websockets.FrameHeader(*args, **kwargs)
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f2 = websockets.FrameHeader.from_file(tutils.treader(bytes(f)))
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assert f == f2
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round()
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round(fin=1)
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round(rsv1=1)
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round(rsv2=1)
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round(rsv3=1)
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round(payload_length=1)
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round(payload_length=100)
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round(payload_length=1000)
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round(payload_length=10000)
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round(opcode=websockets.OPCODE.PING)
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round(masking_key=b"test")
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def test_human_readable(self):
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f = websockets.FrameHeader(
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masking_key=b"test",
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fin=True,
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payload_length=10
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)
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assert repr(f)
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f = websockets.FrameHeader()
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assert repr(f)
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def test_funky(self):
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f = websockets.FrameHeader(masking_key=b"test", mask=False)
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raw = bytes(f)
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f2 = websockets.FrameHeader.from_file(tutils.treader(raw))
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assert not f2.mask
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def test_violations(self):
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tutils.raises("opcode", websockets.FrameHeader, opcode=17)
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tutils.raises("masking key", websockets.FrameHeader, masking_key=b"x")
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def test_automask(self):
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f = websockets.FrameHeader(mask=True)
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assert f.masking_key
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f = websockets.FrameHeader(masking_key=b"foob")
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assert f.mask
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f = websockets.FrameHeader(masking_key=b"foob", mask=0)
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assert not f.mask
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assert f.masking_key
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class TestFrame:
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def test_roundtrip(self):
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def round(*args, **kwargs):
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f = websockets.Frame(*args, **kwargs)
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raw = bytes(f)
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f2 = websockets.Frame.from_file(tutils.treader(raw))
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assert f == f2
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round(b"test")
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round(b"test", fin=1)
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round(b"test", rsv1=1)
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round(b"test", opcode=websockets.OPCODE.PING)
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round(b"test", masking_key=b"test")
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def test_human_readable(self):
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f = websockets.Frame()
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assert repr(f)
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def test_masker():
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tests = [
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[b"a"],
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[b"four"],
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[b"fourf"],
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[b"fourfive"],
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[b"a", b"aasdfasdfa", b"asdf"],
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[b"a" * 50, b"aasdfasdfa", b"asdf"],
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]
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for i in tests:
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m = websockets.Masker(b"abcd")
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data = b"".join([m(t) for t in i])
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data2 = websockets.Masker(b"abcd")(data)
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assert data2 == b"".join(i)
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