Re: [Libevent-users] Send big file with libevent http module

[Ryan Daum <rdaum@xxxxxxxxxx>]

You could implement range support if your client supports them. I don't believe there is content-range support built into libevent, but I wrote my own (can't share, company IP) implementation for libevent. It wasn't that difficult to write. The RFC is pretty clear.

Ryan

On Tue, Jan 31, 2017 at 5:37 AM, Viallard Anthony <viallard@xxxxxxxxx> wrote:

Hi there,

I use libevent 2.0.22 and I'm trying to send a big file with the HTTP
API client to a HTTP server. But there is a problem.

I work on a "embedded" device. This device doesn't have so much memory
(128MB) and the free memory available after a boot is about 30MB. When
I send a file, I open it and put its content in a evbuffer. So, when
the file is about a few kilobytes, it goes well but when I try to send
a big file (a 70MB file for example), the device doesn't have the
required memory and the sending fails.

Is there a way to send a big file by chunks ? I saw on different
documentations I can use the "Expect: 100-Continue" http/1.1 feature.

I read a little bit the source code of libevent and it doesn't seem to
implement this. Am I correct ? Do you know a guy who did this ? Perhaps
there is a source code or a patch somewhere ? If not, I can work on
this because I really need this "feature". Do you have some advices ?
Perhaps you have already thought about how to implement this, haven't
you ?

Regards,
Anthony V.
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