[Lazarus] Changes to fpWeb...

Michael Schnell mschnell at lumino.de
Tue Jan 17 10:21:51 CET 2017

On 16.01.2017 20:19, Daniel Gaspary wrote:

> Can you give examples of these messages? And who (nginx, apache..?)
> and how they are implemented?

In fact I can't, either, that is why I ask.

I do know that there are several frameworks that support this by running 
rather complex Java script on the Client. (For Pascal there once was 
EXTPascal, but AFAIK, the project has died. )

AFAIK there are several "standard" ways to use a HTTP connection via a 
HTTP server in reverse direction, including polling by Java script, 
holding a connection open for an extended amount of time and using an 
additional TCP/IP socket. (I seem to remember names like "Comet" or 
"WebSocket". "WebAssembler" might be a future extension to this, in 
future potentially allowing to run projects created from Pascal code 
directly in the browser.)

It would be nice to have a package Lazarus that supports such things.


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