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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
"""
Test cases for L{twisted.protocols.haproxy.V1Parser}.
"""
from twisted.internet import address
from twisted.trial import unittest
from .. import _v1parser
from .._exceptions import InvalidNetworkProtocol, InvalidProxyHeader, MissingAddressData
class V1ParserTests(unittest.TestCase):
"""
Test L{twisted.protocols.haproxy.V1Parser} behaviour.
"""
def test_missingPROXYHeaderValue(self) -> None:
"""
Test that an exception is raised when the PROXY header is missing.
"""
self.assertRaises(
InvalidProxyHeader,
_v1parser.V1Parser.parse,
b"NOTPROXY ",
)
def test_invalidNetworkProtocol(self) -> None:
"""
Test that an exception is raised when the proto is not TCP or UNKNOWN.
"""
self.assertRaises(
InvalidNetworkProtocol,
_v1parser.V1Parser.parse,
b"PROXY WUTPROTO ",
)
def test_missingSourceData(self) -> None:
"""
Test that an exception is raised when the proto has no source data.
"""
self.assertRaises(
MissingAddressData,
_v1parser.V1Parser.parse,
b"PROXY TCP4 ",
)
def test_missingDestData(self) -> None:
"""
Test that an exception is raised when the proto has no destination.
"""
self.assertRaises(
MissingAddressData,
_v1parser.V1Parser.parse,
b"PROXY TCP4 127.0.0.1 8080 8888",
)
def test_fullParsingSuccess(self) -> None:
"""
Test that parsing is successful for a PROXY header.
"""
info = _v1parser.V1Parser.parse(
b"PROXY TCP4 127.0.0.1 127.0.0.1 8080 8888",
)
self.assertIsInstance(info.source, address.IPv4Address)
assert isinstance(info.source, address.IPv4Address)
assert isinstance(info.destination, address.IPv4Address)
self.assertEqual(info.source.host, "127.0.0.1")
self.assertEqual(info.source.port, 8080)
self.assertEqual(info.destination.host, "127.0.0.1")
self.assertEqual(info.destination.port, 8888)
def test_fullParsingSuccess_IPv6(self) -> None:
"""
Test that parsing is successful for an IPv6 PROXY header.
"""
info = _v1parser.V1Parser.parse(
b"PROXY TCP6 ::1 ::1 8080 8888",
)
self.assertIsInstance(info.source, address.IPv6Address)
assert isinstance(info.source, address.IPv6Address)
assert isinstance(info.destination, address.IPv6Address)
self.assertEqual(info.source.host, "::1")
self.assertEqual(info.source.port, 8080)
self.assertEqual(info.destination.host, "::1")
self.assertEqual(info.destination.port, 8888)
def test_fullParsingSuccess_UNKNOWN(self) -> None:
"""
Test that parsing is successful for a UNKNOWN PROXY header.
"""
info = _v1parser.V1Parser.parse(
b"PROXY UNKNOWN anything could go here",
)
self.assertIsNone(info.source)
self.assertIsNone(info.destination)
def test_feedParsing(self) -> None:
"""
Test that parsing happens when fed a complete line.
"""
parser = _v1parser.V1Parser()
info, remaining = parser.feed(b"PROXY TCP4 127.0.0.1 127.0.0.1 ")
self.assertFalse(info)
self.assertFalse(remaining)
info, remaining = parser.feed(b"8080 8888")
self.assertFalse(info)
self.assertFalse(remaining)
info, remaining = parser.feed(b"\r\n")
self.assertFalse(remaining)
assert remaining is not None
assert info is not None
self.assertIsInstance(info.source, address.IPv4Address)
assert isinstance(info.source, address.IPv4Address)
assert isinstance(info.destination, address.IPv4Address)
self.assertEqual(info.source.host, "127.0.0.1")
self.assertEqual(info.source.port, 8080)
self.assertEqual(info.destination.host, "127.0.0.1")
self.assertEqual(info.destination.port, 8888)
def test_feedParsingTooLong(self) -> None:
"""
Test that parsing fails if no newline is found in 108 bytes.
"""
parser = _v1parser.V1Parser()
info, remaining = parser.feed(b"PROXY TCP4 127.0.0.1 127.0.0.1 ")
self.assertFalse(info)
self.assertFalse(remaining)
info, remaining = parser.feed(b"8080 8888")
self.assertFalse(info)
self.assertFalse(remaining)
self.assertRaises(
InvalidProxyHeader,
parser.feed,
b" " * 100,
)
def test_feedParsingOverflow(self) -> None:
"""
Test that parsing leaves overflow bytes in the buffer.
"""
parser = _v1parser.V1Parser()
info, remaining = parser.feed(
b"PROXY TCP4 127.0.0.1 127.0.0.1 8080 8888\r\nHTTP/1.1 GET /\r\n",
)
self.assertTrue(info)
self.assertEqual(remaining, b"HTTP/1.1 GET /\r\n")
self.assertFalse(parser.buffer)
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