HTTP Request Sent Before Remote Settings Applied

[Mayeut-klarys]

Description

We've identified a potential bug where the library sometimes seems to sends the final HTTP request before applying the remote_settings. This causes the request to be sent with incorrect configuration.

Expected Behavior

The library should only send the HTTP request after fully applying all remote_settings configurations.

Current Behavior

The request is sometimes sent before remote_settings are fully applied, causing incorrect requests to be sent to the server.

Workaround

We've found a temporary workaround by adding a retry mechanism in the Transport layer. Interestingly, the library seems to retain the remote_settings for the second attempt, which results in a correctly configured request on retry.

Environment

• Library version: 0.28.1
• Python version: 3.11.13
• OS: Linux

Impact

This issue affects reliability of API calls and can result in failed requests.

Script we use to reproduce our implementation

import logging

import httpx
logging.basicConfig(
    format="%(levelname)s %(name)s - %(message)s",
    datefmt="%Y-%m-%d %H:%M:%S",
    level=logging.DEBUG
)
client = httpx.Client(
    http1=False, http2=True, timeout=60.0, follow_redirects=False
)
request = client.build_request(
    method="POST",
    url="https://xxx/post",
    content=r"""
    [
        {
            "key": "value"
        }
    ]
    """,
    headers={
        "Content-Type": "application/json",
        "WEAL-TOKEN": "xxx",
        "TARGET-ORGANIZATION-ID": "xxx",
        "User-Agent": "xxx/1.0",
    }
)
if __name__ == "__main__":
    response = client.send(request)

Successful log example

DEBUG httpcore.connection - connect_tcp.started host='xxx.app' port=443 local_address=None timeout=60.0 socket_options=None
DEBUG httpcore.connection - connect_tcp.complete return_value=<httpcore._backends.sync.SyncStream object at 0x7f816d6f4890>
DEBUG httpcore.connection - start_tls.started ssl_context=<ssl.SSLContext object at 0x7f816d6d07a0> server_hostname='xxx.app' timeout=60.0
DEBUG httpcore.connection - start_tls.complete return_value=<httpcore._backends.sync.SyncStream object at 0x7f816d6f47d0>
DEBUG httpcore.http2 - send_connection_init.started request=<Request [b'POST']>
DEBUG httpcore.http2 - send_connection_init.complete
DEBUG httpcore.http2 - send_request_headers.started request=<Request [b'POST']> stream_id=1
DEBUG hpack.hpack - Adding (b':method', b'POST') to the header table, sensitive:False, huffman:True
DEBUG hpack.hpack - Encoding 3 with 7 bits
DEBUG hpack.hpack - Adding (b':authority', b'xxx.app') to the header table, sensitive:False, huffman:True
DEBUG hpack.hpack - Encoding 1 with 6 bits
DEBUG hpack.hpack - Encoding 7 with 7 bits
DEBUG hpack.hpack - Adding (b':scheme', b'https') to the header table, sensitive:False, huffman:True
DEBUG hpack.hpack - Encoding 7 with 7 bits
DEBUG hpack.hpack - Adding (b':path', b'/api-v1/sales-invoice/batch') to the header table, sensitive:False, huffman:True
DEBUG hpack.hpack - Encoding 4 with 6 bits
DEBUG hpack.hpack - Encoding 19 with 7 bits
DEBUG hpack.hpack - Adding (b'accept', b'*/*') to the header table, sensitive:False, huffman:True
DEBUG hpack.hpack - Encoding 19 with 6 bits
DEBUG hpack.hpack - Encoding 3 with 7 bits
DEBUG hpack.hpack - Adding (b'accept-encoding', b'gzip, deflate, br') to the header table, sensitive:False, huffman:True
DEBUG hpack.hpack - Encoding 16 with 6 bits
DEBUG hpack.hpack - Encoding 13 with 7 bits
DEBUG hpack.hpack - Adding (b'content-type', b'application/json') to the header table, sensitive:False, huffman:True
DEBUG hpack.hpack - Encoding 31 with 6 bits
DEBUG hpack.hpack - Encoding 11 with 7 bits
DEBUG hpack.hpack - Adding (b'weal-token', bxxx') to the header table, sensitive:False, huffman:True
DEBUG hpack.hpack - Encoding 8 with 7 bits
DEBUG hpack.hpack - Encoding 144 with 7 bits
DEBUG hpack.hpack - Adding (b'target-organization-id', b'xxx') to the header table, sensitive:False, huffman:True
DEBUG hpack.hpack - Encoding 16 with 7 bits
DEBUG hpack.hpack - Encoding 7 with 7 bits
DEBUG hpack.hpack - Adding (b'user-agent', b'xxx/1.0') to the header table, sensitive:False, huffman:True
DEBUG hpack.hpack - Encoding 58 with 6 bits
DEBUG hpack.hpack - Encoding 7 with 7 bits
DEBUG hpack.hpack - Adding (b'content-length', b'132164') to the header table, sensitive:False, huffman:True
DEBUG hpack.hpack - Encoding 28 with 6 bits
DEBUG hpack.hpack - Encoding 5 with 7 bits
DEBUG hpack.hpack - Encoded header block to b'\x83A\x87\xf1\xeb\xd9\x8e\xb8\xeb\xaf\x87D\x93`u\x99n\xe1a\x03\xa0\xa8X\xd5w9\x88V#\x1aI?S\x83\xf9c\xe7P\x8d\x9b\xd9\xab\xfaRB\xcb@\xd2_\xa5#\xb3_\x8b\x1du\xd0b\r&=LtA\xea@\x88\xf0Q\xd0\xb2O\xd4\xb5\x7f\xff\x11/\xac\xb3\xc7\x88\x86\xd4l\xb98{\xe1\xe7A\xb2\xbe\xb9}e\xf7\',\x86\xd4l\x9e\xb4\xef\xd9\xebGH|\xe8\xe9\x90\xd9\xefe\x04bM\x11\xf5\x92\x88\xe9\xe3\xeb\x9f\xe6\xda?pa\x06N\x87\xf3\xa7\xa7_:/\xec\xf1\xa7\xa7\x0f\x1azs\xf3.\xc5\xfa{\xc3\xcc\xbd\x9ah\xda\xb4I\xd6\xfb_\xbe\xf5\xe0\xe8\xef\xec\x90\xad\xd6B\xac\xed{8m\xfc\x17nS\xbc\x8c\xdc\xfd\xeb\x10\r\x8c\x7f\x98\xfc]s\xf0\xef\xcc\x1e::\xe9\xe2\xfah\xfd3\xf1\x8a\xb1\xeb"\xd7\xfb\xf1C\xb0\xe5\x9b@\x90H\xec\x98\xa9X\xf6L:\x8d\xeci1\xeaX\xd2\x7f\x87\x13l\xba\x06\x9cm\xefz\x87\xe5\xeb\xd9\x8e\xc0W\x07\\\x85\x0b"\x0b\x8d\x7f'
DEBUG httpcore.http2 - send_request_headers.complete
DEBUG httpcore.http2 - send_request_body.started request=<Request [b'POST']> stream_id=1
DEBUG httpcore.http2 - receive_remote_settings.started
DEBUG httpcore.http2 - receive_remote_settings.complete return_value=<RemoteSettingsChanged changed_settings:{ChangedSetting(setting=8, original_value=0, new_value=1), ChangedSetting(setting=4, original_value=65535, new_value=65480), ChangedSetting(setting=3, original_value=None, new_value=100), ChangedSetting(setting=5, original_value=16384, new_value=65536)}>
DEBUG httpcore.http2 - send_request_body.complete
DEBUG httpcore.http2 - receive_response_headers.started request=<Request [b'POST']> stream_id=1
DEBUG hpack.hpack - Decoding b' \x88\x00\x16x-content-type-options\x07nosniffX.no-cache, no-store, max-age=0, must-revalidate\x00\x06pragma\x08no-cached\x010wnSESSION=N2UzNTZjNjctMTE0NC00NDRmLTkzNTAtODQ2MGUxYjhjYzgx; Path=/; HttpOnly; SameSite=Lax; SameSite=Lax; Secure_\x1eapplication/json;charset=UTF-8a\x1dFri, 04 Jul 2025 08:44:27 GMTx-max-age=31536000; includeSubDomains; preload;v\x05xxxf\txxx.app\x00\x0fx-frame-options\nsameorigin\x00\x0fpublic-key-pins\x7f\x1dpin-sha256="iCs6hUOKFLEjpCquLhIWeRwr112srWuONfY7pXASwyY="; pin-sha256="iCs6hUOKFLEjpCquLhIWeRwr112srWuONfY7pXASwyY="; max-age=expireTime; includeSubDomains;\x00\x11x-forwarded-proto\x05https\x00\x0freferrer-policy\x0bsame-origin\x00\x10x-forwarded-port\x03443\x00\x10x-xss-protection\x010\x00\x0efeature-policy camera \'none\'; microphone \'none\'\x00\texpect-ctFmax-age=0, report-uri=\'https://xxx.report-uri.com/r/d/ct/reportOnly\'\x00\x17content-security-policy\x7f\xf9\x02default-src \'none\'; script-src \'self\' \'unsafe-eval\' \'unsafe-inline\' https://www.google.com https://www.gstatic.com; img-src \'self\' https://support.xxx.com data:; style-src \'self\' \'unsafe-inline\'; font-src \'self\'; child-src \'self\'; object-src \'self\'; form-action \'self\' https: https://3dsec.cardcenter.ch https://acs.swisscard.ch https://3dsec.postfinance.ch https://idcheck.acs.touchtechpayments.com; connect-src \'self\'; frame-ancestors \'self\'; base-uri \'self\'; frame-src \'self\' https://www.google.com;{\x0fAccept-EncodingZ\x04gzip'
DEBUG hpack.hpack - Decoded 0, consumed 1 bytes
DEBUG hpack.table - Resizing header table to 0 from 4096
DEBUG hpack.hpack - Decoded 8, consumed 1 bytes
DEBUG hpack.hpack - Decoded (b':status', b'200'), consumed 1
DEBUG hpack.hpack - Decoded 22, consumed 1 bytes
DEBUG hpack.hpack - Decoded 7, consumed 1 bytes
DEBUG hpack.hpack - Decoded (<memory at 0x7f816d6d8ac0>, <memory at 0x7f816d6d87c0>), total consumed 32 bytes, indexed False
DEBUG hpack.hpack - Decoded 24, consumed 1 bytes
DEBUG hpack.hpack - Decoded 46, consumed 1 bytes
DEBUG hpack.hpack - Decoded (b'cache-control', <memory at 0x7f816d6d8c40>), total consumed 48 bytes, indexed True
DEBUG hpack.hpack - Decoded 6, consumed 1 bytes
DEBUG hpack.hpack - Decoded 8, consumed 1 bytes
DEBUG hpack.hpack - Decoded (<memory at 0x7f816d6d8d00>, <memory at 0x7f816d6d8b80>), total consumed 17 bytes, indexed False
DEBUG hpack.hpack - Decoded 36, consumed 1 bytes
DEBUG hpack.hpack - Decoded 1, consumed 1 bytes
DEBUG hpack.hpack - Decoded (b'expires', <memory at 0x7f816d6d8e80>), total consumed 3 bytes, indexed True
DEBUG hpack.hpack - Decoded 55, consumed 1 bytes
DEBUG hpack.hpack - Decoded 110, consumed 1 bytes
DEBUG hpack.hpack - Decoded (b'set-cookie', <memory at 0x7f816d6d8f40>), total consumed 112 bytes, indexed True
DEBUG hpack.hpack - Decoded 31, consumed 1 bytes
DEBUG hpack.hpack - Decoded 30, consumed 1 bytes
DEBUG hpack.hpack - Decoded (b'content-type', <memory at 0x7f816d6d9000>), total consumed 32 bytes, indexed True
DEBUG hpack.hpack - Decoded 33, consumed 1 bytes
DEBUG hpack.hpack - Decoded 29, consumed 1 bytes
DEBUG hpack.hpack - Decoded (b'date', <memory at 0x7f816d6d90c0>), total consumed 31 bytes, indexed True
DEBUG hpack.hpack - Decoded 56, consumed 1 bytes
DEBUG hpack.hpack - Decoded 45, consumed 1 bytes
DEBUG hpack.hpack - Decoded (b'strict-transport-security', <memory at 0x7f816d6d9180>), total consumed 47 bytes, indexed True
DEBUG hpack.hpack - Decoded 54, consumed 1 bytes
DEBUG hpack.hpack - Decoded 5, consumed 1 bytes
DEBUG hpack.hpack - Decoded (b'server', <memory at 0x7f816d6d9240>), total consumed 7 bytes, indexed True
DEBUG hpack.hpack - Decoded 38, consumed 1 bytes
DEBUG hpack.hpack - Decoded 9, consumed 1 bytes
DEBUG hpack.hpack - Decoded (b'host', <memory at 0x7f816d6d9300>), total consumed 11 bytes, indexed True
DEBUG hpack.hpack - Decoded 15, consumed 1 bytes
DEBUG hpack.hpack - Decoded 10, consumed 1 bytes
DEBUG hpack.hpack - Decoded (<memory at 0x7f816d6d93c0>, <memory at 0x7f816d6d8dc0>), total consumed 28 bytes, indexed False
DEBUG hpack.hpack - Decoded 15, consumed 1 bytes
DEBUG hpack.hpack - Decoded 156, consumed 2 bytes
DEBUG hpack.hpack - Decoded (<memory at 0x7f816d6d9540>, <memory at 0x7f816d6d9480>), total consumed 175 bytes, indexed False
DEBUG hpack.hpack - Decoded 17, consumed 1 bytes
DEBUG hpack.hpack - Decoded 5, consumed 1 bytes
DEBUG hpack.hpack - Decoded (<memory at 0x7f816d6d96c0>, <memory at 0x7f816d6d9600>), total consumed 25 bytes, indexed False
DEBUG hpack.hpack - Decoded 15, consumed 1 bytes
DEBUG hpack.hpack - Decoded 11, consumed 1 bytes
DEBUG hpack.hpack - Decoded (<memory at 0x7f816d6d9840>, <memory at 0x7f816d6d9780>), total consumed 29 bytes, indexed False
DEBUG hpack.hpack - Decoded 16, consumed 1 bytes
DEBUG hpack.hpack - Decoded 3, consumed 1 bytes
DEBUG hpack.hpack - Decoded (<memory at 0x7f816d6d99c0>, <memory at 0x7f816d6d9900>), total consumed 22 bytes, indexed False
DEBUG hpack.hpack - Decoded 16, consumed 1 bytes
DEBUG hpack.hpack - Decoded 1, consumed 1 bytes
DEBUG hpack.hpack - Decoded (<memory at 0x7f816d6d9b40>, <memory at 0x7f816d6d9a80>), total consumed 20 bytes, indexed False
DEBUG hpack.hpack - Decoded 14, consumed 1 bytes
DEBUG hpack.hpack - Decoded 32, consumed 1 bytes
DEBUG hpack.hpack - Decoded (<memory at 0x7f816d6d9d80>, <memory at 0x7f816d6d9cc0>), total consumed 49 bytes, indexed False
DEBUG hpack.hpack - Decoded 9, consumed 1 bytes
DEBUG hpack.hpack - Decoded 70, consumed 1 bytes
DEBUG hpack.hpack - Decoded (<memory at 0x7f816d6d9f00>, <memory at 0x7f816d6d9e40>), total consumed 82 bytes, indexed False
DEBUG hpack.hpack - Decoded 23, consumed 1 bytes
DEBUG hpack.hpack - Decoded 504, consumed 3 bytes
DEBUG hpack.hpack - Decoded (<memory at 0x7f816d6da080>, <memory at 0x7f816d6d9fc0>), total consumed 532 bytes, indexed False
DEBUG hpack.hpack - Decoded 59, consumed 1 bytes
DEBUG hpack.hpack - Decoded 15, consumed 1 bytes
DEBUG hpack.hpack - Decoded (b'vary', <memory at 0x7f816d6da200>), total consumed 17 bytes, indexed True
DEBUG hpack.hpack - Decoded 26, consumed 1 bytes
DEBUG hpack.hpack - Decoded 4, consumed 1 bytes
DEBUG hpack.hpack - Decoded (b'content-encoding', <memory at 0x7f816d6da2c0>), total consumed 6 bytes, indexed True
DEBUG httpcore.http2 - receive_response_headers.complete return_value=(200, [(b'x-content-type-options', b'nosniff'), (b'cache-control', b'no-cache, no-store, max-age=0, must-revalidate'), (b'pragma', b'no-cache'), (b'expires', b'0'), (b'set-cookie', b'SESSION=N2UzNTZjNjctMTE0NC00NDRmLTkzNTAtODQ2MGUxYjhjYzgx; Path=/; HttpOnly; SameSite=Lax; SameSite=Lax; Secure'), (b'content-type', b'application/json;charset=UTF-8'), (b'date', b'Fri, 04 Jul 2025 08:44:27 GMT'), (b'strict-transport-security', b'max-age=31536000; includeSubDomains; preload;'), (b'server', b'xxx'), (b'host', b'xxx.app'), (b'x-frame-options', b'sameorigin'), (b'public-key-pins', b'pin-sha256="iCs6hUOKFLEjpCquLhIWeRwr112srWuONfY7pXASwyY="; pin-sha256="iCs6hUOKFLEjpCquLhIWeRwr112srWuONfY7pXASwyY="; max-age=expireTime; includeSubDomains;'), (b'x-forwarded-proto', b'https'), (b'referrer-policy', b'same-origin'), (b'x-forwarded-port', b'443'), (b'x-xss-protection', b'0'), (b'feature-policy', b"camera 'none'; microphone 'none'"), (b'expect-ct', b"max-age=0, report-uri='https://xxx.report-uri.com/r/d/ct/reportOnly'"), (b'content-security-policy', b"default-src 'none'; script-src 'self' 'unsafe-eval' 'unsafe-inline' https://www.google.com https://www.gstatic.com; img-src 'self' https://support.xxx.com data:; style-src 'self' 'unsafe-inline'; font-src 'self'; child-src 'self'; object-src 'self'; form-action 'self' https: https://3dsec.cardcenter.ch https://acs.swisscard.ch https://3dsec.postfinance.ch https://idcheck.acs.touchtechpayments.com; connect-src 'self'; frame-ancestors 'self'; base-uri 'self'; frame-src 'self' https://www.google.com;"), (b'vary', b'Accept-Encoding'), (b'content-encoding', b'gzip')])
INFO httpx - HTTP Request: POST https://xxx.app/post "HTTP/2 200 OK"
DEBUG httpcore.http2 - receive_response_body.started request=<Request [b'POST']> stream_id=1
DEBUG httpcore.http2 - receive_response_body.complete
DEBUG httpcore.http2 - response_closed.started stream_id=1
DEBUG httpcore.http2 - response_closed.complete

Failing log example (same request)

/home/mct/.local/share/virtualenvs/procsea-app-GLmzHUsu/bin/python3.11 /home/mct/.config/JetBrains/PyCharm2024.3/scratches/scratch_83.py
DEBUG httpcore.connection - connect_tcp.started host='xxx.app' port=443 local_address=None timeout=60.0 socket_options=None
DEBUG httpcore.connection - connect_tcp.complete return_value=<httpcore._backends.sync.SyncStream object at 0x70e68369d810>
DEBUG httpcore.connection - start_tls.started ssl_context=<ssl.SSLContext object at 0x70e682f787a0> server_hostname='xxx.app' timeout=60.0
DEBUG httpcore.connection - start_tls.complete return_value=<httpcore._backends.sync.SyncStream object at 0x70e682f9c610>
DEBUG httpcore.http2 - send_connection_init.started request=<Request [b'POST']>
DEBUG httpcore.http2 - send_connection_init.complete
DEBUG httpcore.http2 - send_request_headers.started request=<Request [b'POST']> stream_id=1
DEBUG hpack.hpack - Adding (b':method', b'POST') to the header table, sensitive:False, huffman:True
DEBUG hpack.hpack - Encoding 3 with 7 bits
DEBUG hpack.hpack - Adding (b':authority', b'xxx.app') to the header table, sensitive:False, huffman:True
DEBUG hpack.hpack - Encoding 1 with 6 bits
DEBUG hpack.hpack - Encoding 7 with 7 bits
DEBUG hpack.hpack - Adding (b':scheme', b'https') to the header table, sensitive:False, huffman:True
DEBUG hpack.hpack - Encoding 7 with 7 bits
DEBUG hpack.hpack - Adding (b':path', b'/api-v1/sales-invoice/batch') to the header table, sensitive:False, huffman:True
DEBUG hpack.hpack - Encoding 4 with 6 bits
DEBUG hpack.hpack - Encoding 19 with 7 bits
DEBUG hpack.hpack - Adding (b'accept', b'*/*') to the header table, sensitive:False, huffman:True
DEBUG hpack.hpack - Encoding 19 with 6 bits
DEBUG hpack.hpack - Encoding 3 with 7 bits
DEBUG hpack.hpack - Adding (b'accept-encoding', b'gzip, deflate, br') to the header table, sensitive:False, huffman:True
DEBUG hpack.hpack - Encoding 16 with 6 bits
DEBUG hpack.hpack - Encoding 13 with 7 bits
DEBUG hpack.hpack - Adding (b'content-type', b'application/json') to the header table, sensitive:False, huffman:True
DEBUG hpack.hpack - Encoding 31 with 6 bits
DEBUG hpack.hpack - Encoding 11 with 7 bits
DEBUG hpack.hpack - Adding (b'weal-token', b'xxx') to the header table, sensitive:False, huffman:True
DEBUG hpack.hpack - Encoding 8 with 7 bits
DEBUG hpack.hpack - Encoding 144 with 7 bits
DEBUG hpack.hpack - Adding (b'target-organization-id', b'xxx') to the header table, sensitive:False, huffman:True
DEBUG hpack.hpack - Encoding 16 with 7 bits
DEBUG hpack.hpack - Encoding 7 with 7 bits
DEBUG hpack.hpack - Adding (b'user-agent', b'xxx/1.0') to the header table, sensitive:False, huffman:True
DEBUG hpack.hpack - Encoding 58 with 6 bits
DEBUG hpack.hpack - Encoding 7 with 7 bits
DEBUG hpack.hpack - Adding (b'content-length', b'132164') to the header table, sensitive:False, huffman:True
DEBUG hpack.hpack - Encoding 28 with 6 bits
DEBUG hpack.hpack - Encoding 5 with 7 bits
DEBUG hpack.hpack - Encoded header block to b'\x83A\x87\xf1\xeb\xd9\x8e\xb8\xeb\xaf\x87D\x93`u\x99n\xe1a\x03\xa0\xa8X\xd5w9\x88V#\x1aI?S\x83\xf9c\xe7P\x8d\x9b\xd9\xab\xfaRB\xcb@\xd2_\xa5#\xb3_\x8b\x1du\xd0b\r&=LtA\xea@\x88\xf0Q\xd0\xb2O\xd4\xb5\x7f\xff\x11/\xac\xb3\xc7\x88\x86\xd4l\xb98{\xe1\xe7A\xb2\xbe\xb9}e\xf7\',\x86\xd4l\x9e\xb4\xef\xd9\xebGH|\xe8\xe9\x90\xd9\xefe\x04bM\x11\xf5\x92\x88\xe9\xe3\xeb\x9f\xe6\xda?pa\x06N\x87\xf3\xa7\xa7_:/\xec\xf1\xa7\xa7\x0f\x1azs\xf3.\xc5\xfa{\xc3\xcc\xbd\x9ah\xda\xb4I\xd6\xfb_\xbe\xf5\xe0\xe8\xef\xec\x90\xad\xd6B\xac\xed{8m\xfc\x17nS\xbc\x8c\xdc\xfd\xeb\x10\r\x8c\x7f\x98\xfc]s\xf0\xef\xcc\x1e::\xe9\xe2\xfah\xfd3\xf1\x8a\xb1\xeb"\xd7\xfb\xf1C\xb0\xe5\x9b@\x90H\xec\x98\xa9X\xf6L:\x8d\xeci1\xeaX\xd2\x7f\x87\x13l\xba\x06\x9cm\xefz\x87\xe5\xeb\xd9\x8e\xc0W\x07\\\x85\x0b"\x0b\x8d\x7f'
DEBUG httpcore.http2 - send_request_headers.complete
DEBUG httpcore.http2 - send_request_body.started request=<Request [b'POST']> stream_id=1
DEBUG httpcore.http2 - receive_remote_settings.started
DEBUG httpcore.http2 - receive_remote_settings.complete return_value=<RemoteSettingsChanged changed_settings:{ChangedSetting(setting=8, original_value=0, new_value=1), ChangedSetting(setting=4, original_value=65535, new_value=65480), ChangedSetting(setting=3, original_value=None, new_value=100), ChangedSetting(setting=5, original_value=16384, new_value=65536)}>
DEBUG httpcore.http2 - send_request_body.failed exception=FlowControlError('Cannot send 66574 bytes, flow control window is -55')
DEBUG httpcore.http2 - response_closed.started stream_id=1
DEBUG httpcore.http2 - response_closed.complete