Re: Is it possible to change the recv buffer size dynamically for network process or subprocess?

[HaiJun Zhang <netjune@outlook.com>]

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在 2020年3月21日 +0800 PM8:10，Robert Pluim <rpluim@gmail.com>，写道：
> > > > > > On Sat, 21 Mar 2020 11:01:05 +0800, HaiJun Zhang <netjune@outlook.com> said:
>
> HaiJun> For example, I have binary message format like this:
> HaiJun> 1. It has a four-bytes header and payload.
> HaiJun> 2. The four-bytes header is the payload size of the message.
>
> HaiJun> First I want to set the size of the recv buffer to 4. After the four
> HaiJun> bytes arrived, I parse them and get the size of the payload. Then I
> HaiJun> set the size of the recv buffer to the size of the payload to recv the
> HaiJun> payload.
>
> Why bother? Youʼre going to have to handle partial recv for the
> payload anyway, so you might as well do it from the start.
>
> Robert

I want to do flow control, because too many data may cause UI unresponsive. Set the recv buffer size to 4, and if I don’t fetch the four bytes, please don’t receive more data. If the size (In the four bytes header) is too big, ask the user if the message should be received.


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