Decode a trail of <<Header, Length, Payload, ......, Header, Length, Payload,.......>> from Binary Input

Jesper Louis Andersen jesper.louis.andersen@REDACTED
Tue Jul 14 23:59:53 CEST 2020

On Tue, Jul 14, 2020 at 11:44 PM Papa Tana <papa.tana101@REDACTED> wrote:

>                                         << _:8, Length1:8, Rest1/binary >>
> = Data,
>                                         NumberOfOctets1 = Length1*8,
>                                         << _:8, _:8,
> Content1:NumberOfOctets1, Rest11/binary>> = Rest1,
>                                         {ok,
> <<Header:8,Length1:8,Content1:NumberOfOctets1>>, Rest11};

There are two problems here you are running into:

First, you split Data into a header, a length and the rest. But then you
split Rest1 again, skipping the header and length. So you are skipping
twice over the header and the length. You need to remove `_:8, _:8` because
you already stripped that off when you hand in Rest1.

The other problem is that when you write `Content1:NumberOfOctets1` Erlang
defaults that to an integer, but you probably want a binary (and they
default to a multiple of 8 octet size, so you could write
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