Re: [lwip-users] Get POST data from a netbuf (Netconn API)

[Noam Weissman]

Dear,

Parsing POST is much more complicated then GET.

Its better to get a working server then starting to do it yourself.... I did 
that and it took
Lots of time.

Try the contiki project. It has an HTTP server that may work for you:
   http://www.contiki-os.org/


Good luck,
Noam.

-----Original Message-----
From: lwip-users [mailto:address@hidden On Behalf Of clement.deleurence
Sent: Monday, August 01, 2016 3:01 PM
To: address@hidden
Subject: [lwip-users] Get POST data from a netbuf (Netconn API)

Hi everyone,

I'm currently working with the Netconn API, trying to develop a web server 
which will handle GET and POST requests (in order to get/modify values of 
variables on my Stellaris).

The web server is working fine, i'm able to send GET requests (with Chrome
browser) on the web server embedded on the Stellaris. 
However, i don't know how to get POST data sent from my browser to the server.

I tried this so far (simplified version obviously) :

*struct netbuf *inbuf;
u16_t buflen;
char *buf;

netbuf_data(inbuf, (void*)&buf, &buflen);*

With the code shows above, i get this in *buf*: 

POST /WebService/HelloWorld HTTP/1.1
[...]
Content-Length: 15
[...]
Content-Type: application/x-www-form-urlencoded [...]
Accept-Encoding: gzip, deflate Accept-Language:
fr-FR,fr;q=0.8,en-US;q=0.6,en;q=0.4


I read severals times that POST data are appended to the request header, after 
a double newline.
However, i have nothing more to read than what you see above in *buf*.

So, i thought that POST data may be located in the next fragment of my netbuf 
but after checking with the function *netbuf_next*, it appeared that there is 
no more fragments in the netbuf.

I even tried to get all the netbuf with the function *netbuf_copy* (which 
"Copies all of the data from the netbuf buf into the memory pointed to by data 
even if the netbuf buf is fragmented") and i only get this :

POST /WebService/HelloWorld HTTP/1.1
[...]
Content-Length: 15
[...]
Content-Type: application/x-www-form-urlencoded [...]
Accept-Encoding: gzip, deflate Accept-Language:
fr-FR,fr;q=0.8,en-US;q=0.6,en;q=0.4

The first and single fragment...

So, as i'm really struggling with POST request, I'm asking if the Netconn API 
can handle POST request or if I made mistakes.

Thanks for help! 



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