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Re: [lwip-users] Single connection with "httpd" web server

From: Radouch, Zdenek
Subject: Re: [lwip-users] Single connection with "httpd" web server
Date: Tue, 12 May 2015 21:15:07 +0000

> -----Original Message-----
> From: address@hidden [mailto:lwip-
> address@hidden On Behalf Of
> address@hidden
> Sent: Tuesday, May 12, 2015 3:19 PM
> To: Mailing list for lwIP users
> Subject: Re: [lwip-users] Single connection with "httpd" web server
> Info wrote:
> > Now I would like to limit the number of connections to one, that
> means
> > only one user can connect to the web server (and can make changes on
> > the configuration of the embedded system).
> That's not a good idea. It's just not the way HTTP and browsers work.

1. HTTP is just a protocol, nothing to do with the number of concurrent 
   it will work perfectly fine if you limit the connections to one at a time.
2. Whether or not a browser will create multiple connections depends on your 
   which you can fully control, so I don't think this is such a bad idea at all.

BTW, once you try running a secure web server on an embedded target, the 
16-32kB per
TLS connection (WolfSSL) will make you very quickly appreciate the benefit of
limiting the number of concurrent connections.


> Every browser will open multiple connections and expect them to
> succeed.
> It won't use the first (successful) connection to load files that fail
> to download on a 2nd connection.
> You should instead implement a login/logout/timeout procedure to limit
> configuration changes. However, that's not provided as a service by our
> webserver (yet?).
> Simon
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