HTTP client with RTEMS

[Hui Yie Teh]

Hi Christian,

Thank you for the reply!

My app will be doing some simple HTTP, with GET and POST requests that has
a text response body, e.g. "Received". I think following the mghttpd test
will suffice.

However, I'm currently looking at the code for the mghttpd test and I was
wondering if there is a way I can run it or get a non-test version of it? I
can't really tell what I need or what the code does without running it.

Cheers.

On 6 October 2017 at 07:47, Christian Mauderer <list at c-mauderer.de> wrote:

> Am 05.10.2017 um 17:52 schrieb Hui Yie Teh:
> > Hi,
> >
> > I am trying to build a HTTP client using RTEMS. Is there any tutorials
> > that I can follow? I already have a server running, and I just need to
> > send some GET and POST requests.
> >
> > I am new to RTEMS and embedded programming in general. Any help is much
> > appreciated.
> >
> > Cheers,
> > Yie
> >
>
> Hello Yie,
>
> it depends a little on your application.
>
> If you just want to learn a little about the HTTP protocol and only want
> to try some requests, you can just use a raw socket. The HTTP basics are
> really quite simple if you don't want to use things like compression or
> different MIME types. Writing a simple request for some simple html
> document is quite easy. Something like that is done in the test for the
> mghttpd in RTEMS:
>
>     https://git.rtems.org/rtems/tree/testsuites/libtests/mghttpd01
>
> Note that there are most likely a lot of error cases that are not caught
> in that test (like unexpected HTTP responses).
>
> If you need your client for some more professional application or
> something that should be more robust, I would suggest to use some
> library that does most of the low level handling. I'm not aware of one
> integrated into RTEMS but it shouldn't be hard to find one that works.
>
> I think that I have seen some client functions in civetweb (still
> MIT-licensed fork of mongoose httpd which has been forked off before the
> license change in mongoose). From my experience, civetweb needs only
> very few modifications to work with RTEMS.
>
> Most likely you can also (with some more effort) compile some bigger C
> or C++ libraries like libcurl. But I haven't tried that yet. By the way:
> there is also a large list of http client libraries on the libcurl
> Homepage: https://curl.haxx.se/libcurl/competitors.html
>
> Regards
>
> Christian
>
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