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import asyncio
import ipaddress
import socket
from ipaddress import ip_address
from typing import Any, Awaitable, Callable, Collection, List, NamedTuple, Tuple, Union
from unittest.mock import Mock, create_autospec, patch
import pytest
from aiohttp.resolver import (
_NAME_SOCKET_FLAGS,
AsyncResolver,
DefaultResolver,
ThreadedResolver,
)
try:
import aiodns
getaddrinfo: Any = hasattr(aiodns.DNSResolver, "getaddrinfo")
except ImportError:
aiodns = None # type: ignore[assignment]
getaddrinfo = False
class FakeAIODNSAddrInfoNode(NamedTuple):
family: int
addr: Union[Tuple[bytes, int], Tuple[bytes, int, int, int]]
class FakeAIODNSAddrInfoIPv4Result:
def __init__(self, hosts: Collection[str]) -> None:
self.nodes = [
FakeAIODNSAddrInfoNode(socket.AF_INET, (h.encode(), 0)) for h in hosts
]
class FakeAIODNSAddrInfoIPv6Result:
def __init__(self, hosts: Collection[str]) -> None:
self.nodes = [
FakeAIODNSAddrInfoNode(
socket.AF_INET6,
(h.encode(), 0, 0, 3 if ip_address(h).is_link_local else 0),
)
for h in hosts
]
class FakeAIODNSNameInfoIPv6Result:
def __init__(self, host: str) -> None:
self.node = host
self.service = None
class FakeQueryResult:
def __init__(self, host):
self.host = host
async def fake_aiodns_getaddrinfo_ipv4_result(
hosts: Collection[str],
) -> FakeAIODNSAddrInfoIPv4Result:
return FakeAIODNSAddrInfoIPv4Result(hosts=hosts)
async def fake_aiodns_getaddrinfo_ipv6_result(
hosts: Collection[str],
) -> FakeAIODNSAddrInfoIPv6Result:
return FakeAIODNSAddrInfoIPv6Result(hosts=hosts)
async def fake_aiodns_getnameinfo_ipv6_result(
host: str,
) -> FakeAIODNSNameInfoIPv6Result:
return FakeAIODNSNameInfoIPv6Result(host)
async def fake_query_result(result):
return [FakeQueryResult(host=h) for h in result]
def fake_addrinfo(hosts: Collection[str]) -> Callable[..., Awaitable[Any]]:
async def fake(*args: Any, **kwargs: Any) -> List[Any]:
if not hosts:
raise socket.gaierror
return [(socket.AF_INET, None, socket.SOCK_STREAM, None, [h, 0]) for h in hosts]
return fake
def fake_ipv6_addrinfo(hosts: Collection[str]) -> Callable[..., Awaitable[Any]]:
async def fake(*args: Any, **kwargs: Any) -> List[Any]:
if not hosts:
raise socket.gaierror
return [
(
socket.AF_INET6,
None,
socket.SOCK_STREAM,
None,
(h, 0, 0, 3 if ip_address(h).is_link_local else 0),
)
for h in hosts
]
return fake
def fake_ipv6_nameinfo(host: str) -> Callable[..., Awaitable[Any]]:
async def fake(*args: Any, **kwargs: Any) -> Tuple[str, int]:
return host, 0
return fake
@pytest.mark.skipif(not getaddrinfo, reason="aiodns >=3.2.0 required")
async def test_async_resolver_positive_ipv4_lookup(loop: Any) -> None:
with patch("aiodns.DNSResolver") as mock:
mock().getaddrinfo.return_value = fake_aiodns_getaddrinfo_ipv4_result(
["127.0.0.1"]
)
resolver = AsyncResolver()
real = await resolver.resolve("www.python.org")
ipaddress.ip_address(real[0]["host"])
mock().getaddrinfo.assert_called_with(
"www.python.org",
family=socket.AF_INET,
flags=socket.AI_ADDRCONFIG,
port=0,
type=socket.SOCK_STREAM,
)
@pytest.mark.skipif(not getaddrinfo, reason="aiodns >=3.2.0 required")
async def test_async_resolver_positive_link_local_ipv6_lookup(loop: Any) -> None:
with patch("aiodns.DNSResolver") as mock:
mock().getaddrinfo.return_value = fake_aiodns_getaddrinfo_ipv6_result(
["fe80::1"]
)
mock().getnameinfo.return_value = fake_aiodns_getnameinfo_ipv6_result(
"fe80::1%eth0"
)
resolver = AsyncResolver()
real = await resolver.resolve("www.python.org")
ipaddress.ip_address(real[0]["host"])
mock().getaddrinfo.assert_called_with(
"www.python.org",
family=socket.AF_INET,
flags=socket.AI_ADDRCONFIG,
port=0,
type=socket.SOCK_STREAM,
)
mock().getnameinfo.assert_called_with(("fe80::1", 0, 0, 3), _NAME_SOCKET_FLAGS)
@pytest.mark.skipif(not getaddrinfo, reason="aiodns >=3.2.0 required")
async def test_async_resolver_multiple_replies(loop: Any) -> None:
with patch("aiodns.DNSResolver") as mock:
ips = ["127.0.0.1", "127.0.0.2", "127.0.0.3", "127.0.0.4"]
mock().getaddrinfo.return_value = fake_aiodns_getaddrinfo_ipv4_result(ips)
resolver = AsyncResolver()
real = await resolver.resolve("www.google.com")
ips = [ipaddress.ip_address(x["host"]) for x in real]
assert len(ips) > 3, "Expecting multiple addresses"
@pytest.mark.skipif(aiodns is None, reason="aiodns required")
async def test_async_resolver_query_multiple_replies(loop) -> None:
with patch("aiodns.DNSResolver") as mock:
del mock().gethostbyname
ips = ["127.0.0.1", "127.0.0.2", "127.0.0.3", "127.0.0.4"]
mock().query.return_value = fake_query_result(ips)
resolver = AsyncResolver(loop=loop)
real = await resolver.resolve("www.google.com")
ips = [ipaddress.ip_address(x["host"]) for x in real]
@pytest.mark.skipif(not getaddrinfo, reason="aiodns >=3.2.0 required")
async def test_async_resolver_negative_lookup(loop: Any) -> None:
with patch("aiodns.DNSResolver") as mock:
mock().getaddrinfo.side_effect = aiodns.error.DNSError()
resolver = AsyncResolver()
with pytest.raises(OSError):
await resolver.resolve("doesnotexist.bla")
@pytest.mark.skipif(not getaddrinfo, reason="aiodns >=3.2.0 required")
async def test_async_resolver_no_hosts_in_getaddrinfo(loop: Any) -> None:
with patch("aiodns.DNSResolver") as mock:
mock().getaddrinfo.return_value = fake_aiodns_getaddrinfo_ipv4_result([])
resolver = AsyncResolver()
with pytest.raises(OSError):
await resolver.resolve("doesnotexist.bla")
async def test_threaded_resolver_positive_lookup() -> None:
loop = Mock()
loop.getaddrinfo = fake_addrinfo(["127.0.0.1"])
resolver = ThreadedResolver(loop=loop)
real = await resolver.resolve("www.python.org")
assert real[0]["hostname"] == "www.python.org"
ipaddress.ip_address(real[0]["host"])
async def test_threaded_resolver_positive_ipv6_link_local_lookup() -> None:
loop = Mock()
loop.getaddrinfo = fake_ipv6_addrinfo(["fe80::1"])
loop.getnameinfo = fake_ipv6_nameinfo("fe80::1%eth0")
# Mock the fake function that was returned by helper functions
loop.getaddrinfo = create_autospec(loop.getaddrinfo)
loop.getnameinfo = create_autospec(loop.getnameinfo)
# Set the correct return values for mock functions
loop.getaddrinfo.return_value = await fake_ipv6_addrinfo(["fe80::1"])()
loop.getnameinfo.return_value = await fake_ipv6_nameinfo("fe80::1%eth0")()
resolver = ThreadedResolver()
resolver._loop = loop
real = await resolver.resolve("www.python.org")
assert real[0]["hostname"] == "www.python.org"
ipaddress.ip_address(real[0]["host"])
loop.getaddrinfo.assert_called_with(
"www.python.org",
0,
type=socket.SOCK_STREAM,
family=socket.AF_INET,
flags=socket.AI_ADDRCONFIG,
)
loop.getnameinfo.assert_called_with(("fe80::1", 0, 0, 3), _NAME_SOCKET_FLAGS)
async def test_threaded_resolver_multiple_replies() -> None:
loop = Mock()
ips = ["127.0.0.1", "127.0.0.2", "127.0.0.3", "127.0.0.4"]
loop.getaddrinfo = fake_addrinfo(ips)
resolver = ThreadedResolver(loop=loop)
real = await resolver.resolve("www.google.com")
ips = [ipaddress.ip_address(x["host"]) for x in real]
assert len(ips) > 3, "Expecting multiple addresses"
async def test_threaded_negative_lookup() -> None:
loop = Mock()
ips = []
loop.getaddrinfo = fake_addrinfo(ips)
resolver = ThreadedResolver(loop=loop)
with pytest.raises(socket.gaierror):
await resolver.resolve("doesnotexist.bla")
async def test_threaded_negative_ipv6_lookup() -> None:
loop = Mock()
ips: List[Any] = []
loop.getaddrinfo = fake_ipv6_addrinfo(ips)
resolver = ThreadedResolver()
resolver._loop = loop
with pytest.raises(socket.gaierror):
await resolver.resolve("doesnotexist.bla")
async def test_threaded_negative_lookup_with_unknown_result() -> None:
loop = Mock()
# If compile CPython with `--disable-ipv6` option,
# we will get an (int, bytes) tuple, instead of a Exception.
async def unknown_addrinfo(*args: Any, **kwargs: Any) -> List[Any]:
return [
(
socket.AF_INET6,
socket.SOCK_STREAM,
6,
"",
(10, b"\x01\xbb\x00\x00\x00\x00*\x04NB\x00\x1a\x00\x00"),
)
]
loop.getaddrinfo = unknown_addrinfo
resolver = ThreadedResolver()
resolver._loop = loop
with patch("socket.has_ipv6", False):
res = await resolver.resolve("www.python.org")
assert len(res) == 0
async def test_close_for_threaded_resolver(loop) -> None:
resolver = ThreadedResolver()
await resolver.close()
@pytest.mark.skipif(aiodns is None, reason="aiodns required")
async def test_close_for_async_resolver(loop) -> None:
resolver = AsyncResolver(loop=loop)
await resolver.close()
async def test_default_loop_for_threaded_resolver(loop) -> None:
asyncio.set_event_loop(loop)
resolver = ThreadedResolver()
assert resolver._loop is loop
@pytest.mark.skipif(not getaddrinfo, reason="aiodns >=3.2.0 required")
async def test_async_resolver_ipv6_positive_lookup(loop: Any) -> None:
with patch("aiodns.DNSResolver") as mock:
mock().getaddrinfo.return_value = fake_aiodns_getaddrinfo_ipv6_result(["::1"])
resolver = AsyncResolver()
real = await resolver.resolve("www.python.org")
ipaddress.ip_address(real[0]["host"])
mock().getaddrinfo.assert_called_with(
"www.python.org",
family=socket.AF_INET,
flags=socket.AI_ADDRCONFIG,
port=0,
type=socket.SOCK_STREAM,
)
@pytest.mark.skipif(aiodns is None, reason="aiodns required")
async def test_async_resolver_query_ipv6_positive_lookup(loop) -> None:
with patch("aiodns.DNSResolver") as mock:
del mock().gethostbyname
mock().query.return_value = fake_query_result(["::1"])
resolver = AsyncResolver(loop=loop)
real = await resolver.resolve("www.python.org", family=socket.AF_INET6)
ipaddress.ip_address(real[0]["host"])
mock().query.assert_called_with("www.python.org", "AAAA")
@pytest.mark.skipif(not getaddrinfo, reason="aiodns >=3.2.0 required")
async def test_async_resolver_query_fallback_error_messages_passed(
loop: asyncio.AbstractEventLoop,
) -> None:
"""Ensure error messages are passed through from aiodns with query fallback."""
with patch("aiodns.DNSResolver", autospec=True, spec_set=True) as mock:
del mock().gethostbyname
mock().query.side_effect = aiodns.error.DNSError(1, "Test error message")
resolver = AsyncResolver()
with pytest.raises(OSError, match="Test error message") as excinfo:
await resolver.resolve("x.org")
assert excinfo.value.strerror == "Test error message"
@pytest.mark.skipif(not getaddrinfo, reason="aiodns >=3.2.0 required")
async def test_async_resolver_query_fallback_error_messages_passed_no_hosts(
loop: asyncio.AbstractEventLoop,
) -> None:
"""Ensure error messages are passed through from aiodns with query fallback."""
with patch("aiodns.DNSResolver", autospec=True, spec_set=True) as mock:
del mock().gethostbyname
mock().query.return_value = fake_query_result([])
resolver = AsyncResolver()
with pytest.raises(OSError, match="DNS lookup failed") as excinfo:
await resolver.resolve("x.org")
assert excinfo.value.strerror == "DNS lookup failed"
@pytest.mark.skipif(not getaddrinfo, reason="aiodns >=3.2.0 required")
async def test_async_resolver_error_messages_passed(
loop: asyncio.AbstractEventLoop,
) -> None:
"""Ensure error messages are passed through from aiodns."""
with patch("aiodns.DNSResolver", autospec=True, spec_set=True) as mock:
mock().getaddrinfo.side_effect = aiodns.error.DNSError(1, "Test error message")
resolver = AsyncResolver()
with pytest.raises(OSError, match="Test error message") as excinfo:
await resolver.resolve("x.org")
assert excinfo.value.strerror == "Test error message"
@pytest.mark.skipif(not getaddrinfo, reason="aiodns >=3.2.0 required")
async def test_async_resolver_error_messages_passed_no_hosts(
loop: asyncio.AbstractEventLoop,
) -> None:
"""Ensure error messages are passed through from aiodns."""
with patch("aiodns.DNSResolver", autospec=True, spec_set=True) as mock:
mock().getaddrinfo.return_value = fake_aiodns_getaddrinfo_ipv6_result([])
resolver = AsyncResolver()
with pytest.raises(OSError, match="DNS lookup failed") as excinfo:
await resolver.resolve("x.org")
assert excinfo.value.strerror == "DNS lookup failed"
async def test_async_resolver_aiodns_not_present(loop: Any, monkeypatch: Any) -> None:
monkeypatch.setattr("aiohttp.resolver.aiodns", None)
with pytest.raises(RuntimeError):
AsyncResolver(loop=loop)
@pytest.mark.skipif(not getaddrinfo, reason="aiodns >=3.2.0 required")
def test_aio_dns_is_default() -> None:
assert DefaultResolver is AsyncResolver
@pytest.mark.skipif(getaddrinfo, reason="aiodns <3.2.0 required")
def test_threaded_resolver_is_default() -> None:
assert DefaultResolver is ThreadedResolver
|
