[issue7145] UTF-16 BOM is not written by socket.makefile (but is expected by read)

[Antoine Pitrou]

Antoine Pitrou added the comment:

Indeed, I would suggest won't fix.

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resolution:  -> wont fix
status: pending -> closed

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[issue7145] UTF-16 BOM is not written by socket.makefile (but is expected by read)

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

Won't fix?

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nosy: +serhiy.storchaka
status: open -> pending

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[issue7145] UTF-16 BOM is not written by socket.makefile (but is expected by read)

[Antoine Pitrou]

Antoine Pitrou  added the comment:

The explanation is that sockets are not seekable, but the heuristic to
decide whether to write a BOM relies on tell() to return 0 on start-of-file.
If we unconditionally wrote a BOM, there would be a risk of duplicate
BOMs depending on the use case, which is more annoying than lacking a
BOM at the beginning.

--
components: +IO
nosy: +pitrou
priority:  -> normal

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[issue7145] UTF-16 BOM is not written by socket.makefile (but is expected by read)

[Ezio Melotti]

Changes by Ezio Melotti :


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nosy: +ezio.melotti

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[issue7145] UTF-16 BOM is not written by socket.makefile (but is expected by read)

[Yang Zhang]

Yang Zhang  added the comment:

To answer my own question: specify UTF-16BE or UTF-16LE

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[issue7145] UTF-16 BOM is not written by socket.makefile (but is expected by read)

[Yang Zhang]

New submission from Yang Zhang :

When I call s.makefile('r',encoding='utf-16').read(), this expects a BOM, 
but s.makefile('w',encoding='utf-16').write('hello') doesn't produce it. 
This is asymmetric.

BTW is there a way to prevent the reading file from expecting a BOM?

--
components: Library (Lib)
messages: 94108
nosy: yang
severity: normal
status: open
title: UTF-16 BOM is not written by socket.makefile (but is expected by read)
type: behavior
versions: Python 3.2

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