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Re: Send data to asyncio coroutine

From Marko Rauhamaa <marko@pacujo.net>
Newsgroups comp.lang.python
Subject Re: Send data to asyncio coroutine
Date 2015-08-01 22:14 +0300
Organization A noiseless patient Spider
Message-ID <87si82u8gh.fsf@elektro.pacujo.net> (permalink)
References (2 earlier) <mailman.1136.1438447505.3674.python-list@python.org> <b0d90e04-000f-4e5d-af60-995320b50029@googlegroups.com> <871tfmvoqc.fsf@elektro.pacujo.net> <mailman.1138.1438454762.3674.python-list@python.org> <0310f559-8700-4e53-8e04-16eaf9e372b7@googlegroups.com>

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Javier <jcarmena@gmail.com>:

> My intention now is to use the asyncio.StreamReader passed as argument
> to the asyncio.start_server callback to read objects serialized with
> pickle. The problems are that pickle cant read from it (because dont
> yield from the full stack) and that I don't know the exact length of
> each serialized object, so I can't extract data manually.
>
> Knows anybody the steps to follow?

You probably need to frame your pickled encoding. A simple thing would
be to use struct.pack/unpack to encode the length of the pickle encoding
in front of the pickle encoding. When decoding, you first read out the
length, then the pickle encoding, and finally you unpickle the payload.


Marko

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Thread

Send data to asyncio coroutine jcarmena@gmail.com - 2015-07-21 04:31 -0700
  Re: Send data to asyncio coroutine Ian Kelly <ian.g.kelly@gmail.com> - 2015-07-21 07:35 -0600
    Re: Send data to asyncio coroutine Javier <jcarmena@gmail.com> - 2015-07-28 14:17 -0700
      Re: Send data to asyncio coroutine Javier <jcarmena@gmail.com> - 2015-07-28 15:41 -0700
        Re: Send data to asyncio coroutine Ian Kelly <ian.g.kelly@gmail.com> - 2015-07-28 15:20 -0800
      Re: Send data to asyncio coroutine Ian Kelly <ian.g.kelly@gmail.com> - 2015-07-28 15:06 -0800
        Re: Send data to asyncio coroutine Rustom Mody <rustompmody@gmail.com> - 2015-07-28 19:52 -0700
        Re: Send data to asyncio coroutine Javier <jcarmena@gmail.com> - 2015-07-29 07:24 -0700
  Re: Send data to asyncio coroutine Javier <jcarmena@gmail.com> - 2015-08-01 09:07 -0700
    Re: Send data to asyncio coroutine Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-08-01 17:41 +0100
      Re: Send data to asyncio coroutine Javier <jcarmena@gmail.com> - 2015-08-01 11:22 -0700
        Re: Send data to asyncio coroutine Marko Rauhamaa <marko@pacujo.net> - 2015-08-01 21:38 +0300
          Re: Send data to asyncio coroutine Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-08-01 19:45 +0100
            Re: Send data to asyncio coroutine Javier <jcarmena@gmail.com> - 2015-08-01 12:07 -0700
              Re: Send data to asyncio coroutine Marko Rauhamaa <marko@pacujo.net> - 2015-08-01 22:14 +0300
                Re: Send data to asyncio coroutine Javier <jcarmena@gmail.com> - 2015-08-01 17:50 -0700
              Re: Send data to asyncio coroutine Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-08-01 20:33 +0100
              Re: Send data to asyncio coroutine Chris Angelico <rosuav@gmail.com> - 2015-08-02 09:28 +1000
            Re: Send data to asyncio coroutine Marko Rauhamaa <marko@pacujo.net> - 2015-08-01 22:09 +0300
              Re: Send data to asyncio coroutine Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-08-01 20:29 +0100
    Re: Send data to asyncio coroutine Marko Rauhamaa <marko@pacujo.net> - 2015-08-01 20:18 +0300
      Re: Send data to asyncio coroutine Javier <jcarmena@gmail.com> - 2015-08-01 10:50 -0700
        Re: Send data to asyncio coroutine Marko Rauhamaa <marko@pacujo.net> - 2015-08-01 21:33 +0300

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