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|
import hpack
import hyperframe.frame
import pytest
import httpcore
def test_http2_connection():
origin = httpcore.Origin(b"https", b"example.com", 443)
stream = httpcore.MockStream(
[
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=["END_STREAM"]
).serialize(),
]
)
with httpcore.HTTP2Connection(
origin=origin, stream=stream, keepalive_expiry=5.0
) as conn:
response = conn.request("GET", "https://example.com/")
assert response.status == 200
assert response.content == b"Hello, world!"
assert conn.is_idle()
assert conn.is_available()
assert not conn.is_closed()
assert not conn.has_expired()
assert (
conn.info() == "'https://example.com:443', HTTP/2, IDLE, Request Count: 1"
)
assert (
repr(conn)
== "<HTTP2Connection ['https://example.com:443', IDLE, Request Count: 1]>"
)
def test_http2_connection_closed():
origin = httpcore.Origin(b"https", b"example.com", 443)
stream = httpcore.MockStream(
[
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=["END_STREAM"]
).serialize(),
# Connection is closed after the first response
hyperframe.frame.GoAwayFrame(
stream_id=0, error_code=0, last_stream_id=1
).serialize(),
]
)
with httpcore.HTTP2Connection(
origin=origin, stream=stream, keepalive_expiry=5.0
) as conn:
conn.request("GET", "https://example.com/")
with pytest.raises(httpcore.ConnectionNotAvailable):
conn.request("GET", "https://example.com/")
assert not conn.is_available()
def test_http2_connection_post_request():
origin = httpcore.Origin(b"https", b"example.com", 443)
stream = httpcore.MockStream(
[
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=["END_STREAM"]
).serialize(),
]
)
with httpcore.HTTP2Connection(origin=origin, stream=stream) as conn:
response = conn.request(
"POST",
"https://example.com/",
headers={b"content-length": b"17"},
content=b'{"data": "upload"}',
)
assert response.status == 200
assert response.content == b"Hello, world!"
def test_http2_connection_with_remote_protocol_error():
"""
If a remote protocol error occurs, then no response will be returned,
and the connection will not be reusable.
"""
origin = httpcore.Origin(b"https", b"example.com", 443)
stream = httpcore.MockStream([b"Wait, this isn't valid HTTP!", b""])
with httpcore.HTTP2Connection(origin=origin, stream=stream) as conn:
with pytest.raises(httpcore.RemoteProtocolError):
conn.request("GET", "https://example.com/")
def test_http2_connection_with_rst_stream():
"""
If a stream reset occurs, then no response will be returned,
but the connection will remain reusable for other requests.
"""
origin = httpcore.Origin(b"https", b"example.com", 443)
stream = httpcore.MockStream(
[
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(),
# Stream is closed midway through the first response...
hyperframe.frame.RstStreamFrame(stream_id=1, error_code=8).serialize(),
# ...Which doesn't prevent the second response.
hyperframe.frame.HeadersFrame(
stream_id=3,
data=hpack.Encoder().encode(
[
(b":status", b"200"),
(b"content-type", b"plain/text"),
]
),
flags=["END_HEADERS"],
).serialize(),
hyperframe.frame.DataFrame(
stream_id=3, data=b"Hello, world!", flags=["END_STREAM"]
).serialize(),
b"",
]
)
with httpcore.HTTP2Connection(origin=origin, stream=stream) as conn:
with pytest.raises(httpcore.RemoteProtocolError):
conn.request("GET", "https://example.com/")
response = conn.request("GET", "https://example.com/")
assert response.status == 200
def test_http2_connection_with_goaway():
"""
If a GoAway frame occurs, then no response will be returned,
and the connection will not be reusable for other requests.
"""
origin = httpcore.Origin(b"https", b"example.com", 443)
stream = httpcore.MockStream(
[
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(),
# Connection is closed midway through the first response...
hyperframe.frame.GoAwayFrame(stream_id=0, error_code=0).serialize(),
# ...We'll never get to this second response.
hyperframe.frame.HeadersFrame(
stream_id=3,
data=hpack.Encoder().encode(
[
(b":status", b"200"),
(b"content-type", b"plain/text"),
]
),
flags=["END_HEADERS"],
).serialize(),
hyperframe.frame.DataFrame(
stream_id=3, data=b"Hello, world!", flags=["END_STREAM"]
).serialize(),
b"",
]
)
with httpcore.HTTP2Connection(origin=origin, stream=stream) as conn:
# The initial request has been closed midway, with an unrecoverable error.
with pytest.raises(httpcore.RemoteProtocolError):
conn.request("GET", "https://example.com/")
# The second request can receive a graceful `ConnectionNotAvailable`,
# and may be retried on a new connection.
with pytest.raises(httpcore.ConnectionNotAvailable):
conn.request("GET", "https://example.com/")
def test_http2_connection_with_flow_control():
origin = httpcore.Origin(b"https", b"example.com", 443)
stream = httpcore.MockStream(
[
hyperframe.frame.SettingsFrame().serialize(),
# Available flow: 65,535
hyperframe.frame.WindowUpdateFrame(
stream_id=0, window_increment=10_000
).serialize(),
hyperframe.frame.WindowUpdateFrame(
stream_id=1, window_increment=10_000
).serialize(),
# Available flow: 75,535
hyperframe.frame.WindowUpdateFrame(
stream_id=0, window_increment=10_000
).serialize(),
hyperframe.frame.WindowUpdateFrame(
stream_id=1, window_increment=10_000
).serialize(),
# Available flow: 85,535
hyperframe.frame.WindowUpdateFrame(
stream_id=0, window_increment=10_000
).serialize(),
hyperframe.frame.WindowUpdateFrame(
stream_id=1, window_increment=10_000
).serialize(),
# Available flow: 95,535
hyperframe.frame.WindowUpdateFrame(
stream_id=0, window_increment=10_000
).serialize(),
hyperframe.frame.WindowUpdateFrame(
stream_id=1, window_increment=10_000
).serialize(),
# Available flow: 105,535
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"100,000 bytes received", flags=["END_STREAM"]
).serialize(),
]
)
with httpcore.HTTP2Connection(origin=origin, stream=stream) as conn:
response = conn.request(
"POST",
"https://example.com/",
content=b"x" * 100_000,
)
assert response.status == 200
assert response.content == b"100,000 bytes received"
def test_http2_connection_attempt_close():
"""
A connection can only be closed when it is idle.
"""
origin = httpcore.Origin(b"https", b"example.com", 443)
stream = httpcore.MockStream(
[
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=["END_STREAM"]
).serialize(),
]
)
with httpcore.HTTP2Connection(origin=origin, stream=stream) as conn:
with conn.stream("GET", "https://example.com/") as response:
response.read()
assert response.status == 200
assert response.content == b"Hello, world!"
conn.close()
with pytest.raises(httpcore.ConnectionNotAvailable):
conn.request("GET", "https://example.com/")
def test_http2_request_to_incorrect_origin():
"""
A connection can only send requests to whichever origin it is connected to.
"""
origin = httpcore.Origin(b"https", b"example.com", 443)
stream = httpcore.MockStream([])
with httpcore.HTTP2Connection(origin=origin, stream=stream) as conn:
with pytest.raises(RuntimeError):
conn.request("GET", "https://other.com/")
def test_http2_remote_max_streams_update():
"""
If the remote server updates the maximum concurrent streams value, we should
be adjusting how many streams we will allow.
"""
origin = httpcore.Origin(b"https", b"example.com", 443)
stream = httpcore.MockStream(
[
hyperframe.frame.SettingsFrame(
settings={hyperframe.frame.SettingsFrame.MAX_CONCURRENT_STREAMS: 1000}
).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!").serialize(),
hyperframe.frame.SettingsFrame(
settings={hyperframe.frame.SettingsFrame.MAX_CONCURRENT_STREAMS: 50}
).serialize(),
hyperframe.frame.DataFrame(
stream_id=1, data=b"Hello, world...again!", flags=["END_STREAM"]
).serialize(),
]
)
with httpcore.HTTP2Connection(origin=origin, stream=stream) as conn:
with conn.stream("GET", "https://example.com/") as response:
i = 0
for chunk in response.iter_stream():
if i == 0:
assert chunk == b"Hello, world!"
assert conn._h2_state.remote_settings.max_concurrent_streams == 1000
assert conn._max_streams == min(
conn._h2_state.remote_settings.max_concurrent_streams,
conn._h2_state.local_settings.max_concurrent_streams,
)
elif i == 1:
assert chunk == b"Hello, world...again!"
assert conn._h2_state.remote_settings.max_concurrent_streams == 50
assert conn._max_streams == min(
conn._h2_state.remote_settings.max_concurrent_streams,
conn._h2_state.local_settings.max_concurrent_streams,
)
i += 1
|
