Bug report

Bug description:

While trying to useread1 in urllib3, we discovered thatread1 unlikeread never closes the response after reading all data when the content length is known (urllib3/urllib3#3235).

importhttp.clientconn=http.client.HTTPSConnection("www.python.org")conn.request("GET","/")response=conn.getresponse()

This runs successfully:

response.read()assertresponse.isclosed()

This fails:

whileresponse.read1():passassertresponse.isclosed()

CPython versions tested on:

3.8, 3.9, 3.10, 3.11, 3.12, 3.13, CPython main branch

Operating systems tested on:

Linux, macOS, Windows

Linked PRs

• gh-113199: Makeread1 andreadline ofHTTPResponse close IO after reading all data #113200
• [3.12] gh-113199: Make read1() and readline() of HTTPResponse close IO after reading all data (GH-113200) #113259
• [3.11] gh-113199: Make read1() and readline() of HTTPResponse close IO after reading all data (GH-113200) #113260