[New-bugs-announce] [issue43524] Addition of peek and peekexactly methods to asyncio.StreamReader

[Awal Garg]

New submission from Awal Garg <awalgarg at gmail.com>:

I propose the addition of the following methods to asyncio.StreamReader:

> coroutine peek(n=-1)
> Same as read, but does not remove the returned data from the internal buffer.
> 
> coroutine peekexactly(n)
> Same as readexactly, but does not remove the returned data from the internal buffer.

My use case is to multiplex a few protocols over a single TCP socket, for which I need to non-destructively read a few bytes from the socket to decide which parser to hand the stream over to.

Thoughts?

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components: asyncio
messages: 388895
nosy: asvetlov, awalgarg, yselivanov
priority: normal
severity: normal
status: open
title: Addition of peek and peekexactly methods to asyncio.StreamReader
type: enhancement
versions: Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue43524>
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