read1 and readline of http.client.HTTPResponse do not raise IncompleteRead

[illia-v]

Bug report

Bug description:

Unlike http.client.HTTPResponse.read, read1 and readline do not raise IncompleteRead when the content length is know and a connection is closed before everything has been read.

FYI, these two methods have had a common issue in the past #113199.

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-115997: Make HTTPResponse.read1 and readline raise IncompleteRead #115998

[serhiy-storchaka]

I am not sure that they should raise IncompleteRead.

AFAIK, only read() without argument raises IncompleteRead, because it needs to read the whole content. read1() and readline() without argument have different semantic, they do not read to the end of the stream. readline() reads to the first end of line, and read1() returns the amount of data depending on buffering. Raising IncompleteRead with second argument equal to self.length would be incorrect, because we cannot guarantee that read1() and readline() would return the specified number of bytes if the connection was not closed.