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import typing
import anyio
import hpack
import hyperframe
import pytest
import httpcore
class SlowWriteStream(httpcore.AsyncNetworkStream):
"""
A stream that we can use to test cancellations during
the request writing.
"""
async def write(
self, buffer: bytes, timeout: typing.Optional[float] = None
) -> None:
await anyio.sleep(999)
async def aclose(self) -> None:
await anyio.sleep(0)
class HandshakeThenSlowWriteStream(httpcore.AsyncNetworkStream):
"""
A stream that we can use to test cancellations during
the HTTP/2 request writing, after allowing the initial
handshake to complete.
"""
def __init__(self) -> None:
self._handshake_complete = False
async def write(
self, buffer: bytes, timeout: typing.Optional[float] = None
) -> None:
if not self._handshake_complete:
self._handshake_complete = True
else:
await anyio.sleep(999)
async def aclose(self) -> None:
await anyio.sleep(0)
class SlowReadStream(httpcore.AsyncNetworkStream):
"""
A stream that we can use to test cancellations during
the response reading.
"""
def __init__(self, buffer: typing.List[bytes]):
self._buffer = buffer
async def write(self, buffer, timeout=None):
pass
async def read(
self, max_bytes: int, timeout: typing.Optional[float] = None
) -> bytes:
if not self._buffer:
await anyio.sleep(999)
return self._buffer.pop(0)
async def aclose(self):
await anyio.sleep(0)
class SlowWriteBackend(httpcore.AsyncNetworkBackend):
async def connect_tcp(
self,
host: str,
port: int,
timeout: typing.Optional[float] = None,
local_address: typing.Optional[str] = None,
socket_options: typing.Optional[typing.Iterable[httpcore.SOCKET_OPTION]] = None,
) -> httpcore.AsyncNetworkStream:
return SlowWriteStream()
class SlowReadBackend(httpcore.AsyncNetworkBackend):
def __init__(self, buffer: typing.List[bytes]):
self._buffer = buffer
async def connect_tcp(
self,
host: str,
port: int,
timeout: typing.Optional[float] = None,
local_address: typing.Optional[str] = None,
socket_options: typing.Optional[typing.Iterable[httpcore.SOCKET_OPTION]] = None,
) -> httpcore.AsyncNetworkStream:
return SlowReadStream(self._buffer)
@pytest.mark.anyio
async def test_connection_pool_timeout_during_request():
"""
An async timeout when writing an HTTP/1.1 response on the connection pool
should leave the pool in a consistent state.
In this case, that means the connection will become closed, and no
longer remain in the pool.
"""
network_backend = SlowWriteBackend()
async with httpcore.AsyncConnectionPool(network_backend=network_backend) as pool:
with anyio.move_on_after(0.01):
await pool.request("GET", "http://example.com")
assert not pool.connections
@pytest.mark.anyio
async def test_connection_pool_timeout_during_response():
"""
An async timeout when reading an HTTP/1.1 response on the connection pool
should leave the pool in a consistent state.
In this case, that means the connection will become closed, and no
longer remain in the pool.
"""
network_backend = SlowReadBackend(
[
b"HTTP/1.1 200 OK\r\n",
b"Content-Type: plain/text\r\n",
b"Content-Length: 1000\r\n",
b"\r\n",
b"Hello, world!...",
]
)
async with httpcore.AsyncConnectionPool(network_backend=network_backend) as pool:
with anyio.move_on_after(0.01):
await pool.request("GET", "http://example.com")
assert not pool.connections
@pytest.mark.anyio
async def test_h11_timeout_during_request():
"""
An async timeout on an HTTP/1.1 during the request writing
should leave the connection in a neatly closed state.
"""
origin = httpcore.Origin(b"http", b"example.com", 80)
stream = SlowWriteStream()
async with httpcore.AsyncHTTP11Connection(origin, stream) as conn:
with anyio.move_on_after(0.01):
await conn.request("GET", "http://example.com")
assert conn.is_closed()
@pytest.mark.anyio
async def test_h11_timeout_during_response():
"""
An async timeout on an HTTP/1.1 during the response reading
should leave the connection in a neatly closed state.
"""
origin = httpcore.Origin(b"http", b"example.com", 80)
stream = SlowReadStream(
[
b"HTTP/1.1 200 OK\r\n",
b"Content-Type: plain/text\r\n",
b"Content-Length: 1000\r\n",
b"\r\n",
b"Hello, world!...",
]
)
async with httpcore.AsyncHTTP11Connection(origin, stream) as conn:
with anyio.move_on_after(0.01):
await conn.request("GET", "http://example.com")
assert conn.is_closed()
@pytest.mark.xfail
@pytest.mark.anyio
async def test_h2_timeout_during_handshake():
"""
An async timeout on an HTTP/2 during the initial handshake
should leave the connection in a neatly closed state.
"""
origin = httpcore.Origin(b"http", b"example.com", 80)
stream = SlowWriteStream()
async with httpcore.AsyncHTTP2Connection(origin, stream) as conn:
with anyio.move_on_after(0.01):
await conn.request("GET", "http://example.com")
assert conn.is_closed()
@pytest.mark.xfail
@pytest.mark.anyio
async def test_h2_timeout_during_request():
"""
An async timeout on an HTTP/2 during a request
should leave the connection in a neatly idle state.
The connection is not closed because it is multiplexed,
and a timeout on one request does not require the entire
connection be closed.
"""
origin = httpcore.Origin(b"http", b"example.com", 80)
stream = HandshakeThenSlowWriteStream()
async with httpcore.AsyncHTTP2Connection(origin, stream) as conn:
with anyio.move_on_after(0.01):
await conn.request("GET", "http://example.com")
assert not conn.is_closed()
assert conn.is_idle()
@pytest.mark.xfail
@pytest.mark.anyio
async def test_h2_timeout_during_response():
"""
An async timeout on an HTTP/2 during the response reading
should leave the connection in a neatly idle state.
The connection is not closed because it is multiplexed,
and a timeout on one request does not require the entire
connection be closed.
"""
origin = httpcore.Origin(b"http", b"example.com", 80)
stream = SlowReadStream(
[
hyperframe.frame.SettingsFrame().serialize(),
hyperframe.frame.HeadersFrame(
stream_id=1,
data=hpack.Encoder().encode(
[
(b":status", b"200"),
(b"content-type", b"plain/text"),
]
),
flags=["END_HEADERS"],
).serialize(),
hyperframe.frame.DataFrame(
stream_id=1, data=b"Hello, world!...", flags=[]
).serialize(),
]
)
async with httpcore.AsyncHTTP2Connection(origin, stream) as conn:
with anyio.move_on_after(0.01):
await conn.request("GET", "http://example.com")
assert not conn.is_closed()
assert conn.is_idle()
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