Re: [lwip-users] httpd: how to redirect to a new address

[Giuseppe Modugno]

Consider that the browser can't continue the communication with the 
server if you change the server IP address. So I implemented the IP 
address change of the web server in the following way.

The client requests a URI with a query string with the new IP 
configuration. httpd calls a CGI handler/callback that saves the new IP 
configuration on the non-volatile memory and reboot itself. The 
Javascript code running in the browser waits for some seconds (with a 
progress bar) after sending the new IP configuration, then redirect to 
the home page again, but using the new IP address.

In this way I avoided the change of IP address during runtime.

Il 19/02/2018 23:18, Jan Menzel ha scritto:
> Hi all!
>         In our application we wont to allow the user to change the ip address
> of the server using a webpage. I wonder what would be the best way of
> doing that.
>         At present we use a very basic webserver that servers a different page
> (with HTTP status code 301) if the parameters update the ip address.
> After sending out the last byte we change the ip address, so the server
> is immediately listening on the new address.
>         With lwip we can either use LWIP_HTTPD_CGI_SSI with a single parameter
> handler but how to server different status codes? And, when is the
> correct time of changing the ip address? Or we could use LWIP_HTTPD_CGI
> which read kind of deprecated in the documentation.
>         Is there a recommended procedure how lwip can server is purpose?
>
>         Jan
>
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