Re: [lwip-users] [OT] httpd: download static files from an external HTTP server

[Giuseppe Modugno]

Il 20/02/2018 08:51, address@hidden ha scritto:
> On 20.02.2018 08:15, Giuseppe Modugno wrote:
> > I think this isn't strictly related to lwip, but it's a request typical
> > on electronic devices where lwip runs, i.e. devices with limited and
> > restricted resources.
>
> It is somewhat related to lwIP as you have to know how to create 
> dynamic content. That depends on the webserver.
Hmm..., I was talking about *static files* only.

> [..]
> > Depending on this variable, the URI of some static files should be:
> >
> >     /img/big_image.png
> >
> > or
> >
> >     external.webserver.org/img/big_image.png
> >
> > Any suggestions?
>
> Yes. If you use lwip's integrated httpd, that is.
>
> You can use SSI to generate the different links. In the lwIP http 
> server, SSI works everywhere in the page, even in a form or in a link 
> element. You only have to set LWIP_HTTPD_SSI_INCLUDE_TAG to 0. If this 
> is 1, the tag part of the html source file gets included in the 
> resulting page and that might violate the html code.
Maybe my request wasn't clear.

I don't need to change this behaviour at runtime or depending on a 
variable in the MCU that runs lwip/httpd. I will decide this behaviour 
at *compile time*, so when generating the httpd filesystem. I'm 
searching for an *HTML only* technique that let me change the URIs from 
one type to the other by changing a single point in a single file.