Errors

Two failures look different.

An HTTP status is still a Response. raise_for_status() raises HTTPError when the status is 400–599. The response is false outside 2xx, and also when the connection failed.

response = await client.get("/missing")
if not response.ok:
    print(response.status_code, response.reason)

A connection failure sets status_code to -1. raise_for_status() then raises a specific error: CouldntConnectError, CouldntResolveHostError, OperationTimedoutError, InterfaceFailedError, SslConnectErrorError, or UnsupportedProtocolError. curl_code is the numeric code. curl_error_message is the message.

from redc.exceptions import CouldntConnectError, OperationTimedoutError

try:
    await client.get("https://example.com", timeout=(5.0, 2.0))
except OperationTimedoutError as exc:
    print(exc)
except CouldntConnectError as exc:
    print(exc)

UnsupportedProtocolError is what you get for a scheme other than http, https, or file, and for a redirect that leaves HTTP.

timeout=(total, connect) is in seconds. The connect value is the cap for the dial. The total covers the whole transfer, including the body.