[Libevent-users] evbuffer - how to read without draining data?

[Jarod Liu <liuyuanzhi@xxxxxxxxx>]

Hi,
I writing a eventbuffer socket app. My app packet have a length
header, I want to read data only when input buffer length > packet
length(I need to read the length header first). But it seems like I
can't read from evbuffer without draining data. Is there a way to do
that?
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