diff options
Diffstat (limited to '.venv/lib/python3.12/site-packages/httpcore/_utils.py')
-rw-r--r-- | .venv/lib/python3.12/site-packages/httpcore/_utils.py | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/.venv/lib/python3.12/site-packages/httpcore/_utils.py b/.venv/lib/python3.12/site-packages/httpcore/_utils.py new file mode 100644 index 00000000..c44ff93c --- /dev/null +++ b/.venv/lib/python3.12/site-packages/httpcore/_utils.py @@ -0,0 +1,37 @@ +from __future__ import annotations + +import select +import socket +import sys + + +def is_socket_readable(sock: socket.socket | None) -> bool: + """ + Return whether a socket, as identifed by its file descriptor, is readable. + "A socket is readable" means that the read buffer isn't empty, i.e. that calling + .recv() on it would immediately return some data. + """ + # NOTE: we want check for readability without actually attempting to read, because + # we don't want to block forever if it's not readable. + + # In the case that the socket no longer exists, or cannot return a file + # descriptor, we treat it as being readable, as if it the next read operation + # on it is ready to return the terminating `b""`. + sock_fd = None if sock is None else sock.fileno() + if sock_fd is None or sock_fd < 0: # pragma: nocover + return True + + # The implementation below was stolen from: + # https://github.com/python-trio/trio/blob/20ee2b1b7376db637435d80e266212a35837ddcc/trio/_socket.py#L471-L478 + # See also: https://github.com/encode/httpcore/pull/193#issuecomment-703129316 + + # Use select.select on Windows, and when poll is unavailable and select.poll + # everywhere else. (E.g. When eventlet is in use. See #327) + if ( + sys.platform == "win32" or getattr(select, "poll", None) is None + ): # pragma: nocover + rready, _, _ = select.select([sock_fd], [], [], 0) + return bool(rready) + p = select.poll() + p.register(sock_fd, select.POLLIN) + return bool(p.poll(0)) |