Giampaolo Rodola' added the comment:
New patch in attachment includes a new 'offset' parameter, new tests and also
update file offset on return or in case of error so that file.tell() can be
used to tell how many bytes were transmitted at any time.
This way we'll avoid using a custom exception.
In summary, the API looks like this.
Transfer ok:
>>> file = open('somefile', 'rb')
>>> s = socket.socket()
>>> sock.sendfile(file)
(True, None)
>>> file.tell()
20000000
>>>
...and in case sendfile() could not be used internally because file was not a
regular file:
>>> file = io.BytesIO(b'x' * 1*1024*1024)
>>> sock.sendfile(file)
(False, UnsupportedOperation('fileno',))
>>> file.tell()
20000000
>>>
I still haven't looked into TransmitFile on Windows as I have to figure out how
to compile Python 3.4 on Windows.
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<http://bugs.python.org/issue17552>
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