Re: how to use sessions in CGILUA?

[Tomas <tomas@...>]

	Hi Chris,

> > > I am trying to figure out how to use sessions with CGILUA.
> >         Are you sure the session library is correctly configured?
>
> No, how do I configure the session library? I don't believe the
> configuration of any libraries was mentioned in the guides I read, or
> any other documentation, but I could have missed something.
	You should add the following lines to your configuration
file (/LUA_PATH/cgilua/config.lua):

require"cgilua.session"
cgilua.session.setsessiondir ("/tmp/cgilua/") -- you should edit this!
cgilua.addopenfunction (cgilua.session.open)
cgilua.addclosefunction (cgilua.session.close)

	This will enable the use of the library to all scripts
processed by CGILua in your web server.  If you want to enable it on
demand, you could change the two last lines above by the following:

cgilua.enablesession = function ()
    cgilua.session.open ()
    cgilua.addclosefunction (cgilua.session.close)
end

	This code will provide the function `cgilua.enablesession'
(or the name you want) which should be called at the beginning of any
script that wants to use sessions.

> > > I guess this is probably just because something has changed between
> > > versions, but I can't figure out how to use sessions just by looking
> > > at the docs. I don't know if/when any of those functions need to be
> > > called.
> >         If you're not sure about what version you have installed,
> > please download the most recent one (5.0) and make sure it is correctly
> > installed.
> >         The session library requires that function cgilua.session.open
> > is called before the script is executed and function cgilua.session.close
> > is called after the script ends.  Those functions will manage the table
> > cgilua.data (new versions will call it cgilua.session.data), by obtaining
> > serialized data from a session file (function open) and storing it back to
> > the file when the script ends (function close).
> >         A script that wants to use this feature just have to read and
> > write data to this table and -- very important -- always use cgilua.mkurlpath
> > to build any link in the resulting HTML document.
>
> Whenever I try to do anything with cgilua.session it tells me it is
> nil. Is this because it isn't configured properly?  as a shot in the
> dark I tried to require("cgilua.session"). although it allowed that
> line it didn't have any effect. I still get the error when trying to
> access *anything* in the cgilua.session table.
	You could `require"cgilua.session"' in your script but you'll
have to initialize and finalize the library, just as the above function
`enablesession' does.  An example could be (untested):

require"cgilua.session"
cgilua.setsessiondir("/tmp/cgilua/")
cgilua.session.open ()

-- your script

cgilua.session.close ()

	But pay attention: if an error occurs before the call to
`cgilua.session.close', then it will not be called and the changes to
the session won't be saved.  The use of `cgilua.addclosefunction' avoids
this problem.

	Regards,
		Tomas