Re: [lwip-users] HTTP keep alive SSI

[address@hidden]

Am 06.09.2019 um 19:05 schrieb tomek wilkxt:
>     Hi Tomek,
>
>     are you aware of email threads and that you just hijacked another
>     thread?
>     Never use the "reply" feature unless actually responding to a mail!
>
>
> ok, my mistake

And please, send text-only mails when sending mails to mailing lists!
Thanks!

>     "tomek wilkxt" wrote:
>      > Hi
>      > I read this form "httpd_opts.h" file :
>      > " * A downside of the current SSI implementation is that
>     persistent connections
>      >  * don't work, as the file length is not known in advance (and
>     httpd currently
>      >  * relies on the Content-Length header for persistent connections).
>      >  *
>      >
>      > Do you have a way to solve this problem? I need a permanent
>     connection for xml.json.
>
>     You could use a form of HTTP chunked encoding,
>
>
> You could explain more precisely ?

Not in detail, that would get too long here. Just google for "http
chunked encoding". Basically, you don't send a content length for the
whole response in advance, but you encode the content length in the body
(there are different types of encoding it). Thus the client can know
when the response is finished (without sending FIN).

>     Instead, I used custom files to create such JSON files (not using
>     SSI). Your
>     custom file handler code can then set these files to have a length
>     so that
>     a persistent connection is not a problem.
>
>
> But, how create dynamically json/xml file with variable without SSI?

Have a look at this example in our sources:
http://git.savannah.nongnu.org/cgit/lwip.git/tree/contrib/examples/httpd/genfiles_example/genfiles_example.c

Regards,
Simon