[Lazarus] FCL-Web updates/extensions

Michael Van Canneyt michael at freepascal.org
Wed Sep 1 17:14:44 CEST 2021

On Wed, 1 Sep 2021, Luca Olivetti via lazarus wrote:

> El 1/9/21 a les 13:06, Michael Van Canneyt via lazarus ha escrit:
>> - The websocket protocol support can be attached to the HTTP server. That
>>    means you can initiate a websocket connection on the same port as the 
>>    server is listening; the HTTP server will hand off the connection to the
>>    websocket server using the upgrade mechanism. A server demo is 
>> included as well.
> Having not seen the implementation, my questions are:
> 1) existing code will still work unmodified?


> 2) specifically the hack for server-sent events I mentioned here 
> https://lists.lazarus-ide.org/pipermail/lazarus/2020-June/238089.html 
> will still work?

The pastebin link is down ?

> 1) I suppose is a given ;-), 2) I ask because you only mentioned 
> websockets and not server-sent events.

Server events are normally done using HTTP/2, and this is planned.

I can't promise your code will still run, but since the server was modified 
to keep connections alive indefinitely, I suppose that you should now be 
able to handle server events even easier with the upgrade mechanism;

It's just a matter of deciding to 'upgrade' depending on the URL & headers
in the initial request. In case you try to take a shot at it and you 
need help implementing it, let me know...


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