Re: How to implement a cherrypy server with long-polling enabled path?

On Dec 17, 2019, at 6:23 PM, =E5=8C=97=E7=BE=8E38fule <38fule.north.america=
@gmail.com> wrote:
>=20
> I am a newbie in cherrypy. I've done some research on google but didn't g=
et much helpful information.
> Could someone please point out if cherrypy allows me to write a simple se=
rver that has long-polling enabled path?
> The scenario is like: whenever the database on backend has some updated i=
nformation, it sends signals to the frontend to updates all relevant displa=
y accordingly.
>=20
> Is this achievable using cherrypy? Or I will need tornado-like framework?=
 Could someone also point out a newbie-friendly tutorial for this purpose? =
Thanks.

That=E2=80=99s just not how HTTP works.  The right way to do this is =E2=80=
=9Cpull model=E2=80=9D:  have the clients (that is, the browsers) poll for =
the new data.  It=E2=80=99s possible to use WebSockets to set up a persiste=
nt connection to a server, but you=E2=80=99d want another TCP server, not a=
n HTTP server.  HTTP is fire and forget.  One request, one response, close =
the socket.

General TCP servers are basically trivial to write in Python.
=E2=80=94=20
Tim Roberts, [email protected]
Providenza & Boekelheide, Inc.

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