Re: [phplib] PHPLib and frames examples? From: A.C.N.S. Information and News (infomail <email protected>)
Date: 01/30/01

Well, have got everything working now.

The only problem is that phplib only works with get and not cookies. What's
really weird is that the server is an Apache server on Unix not an IIS
server. Thus far I have only seen IIS servers have this problem. Any
ideas? I had initially set cookies as the default functionality in the
local.inc file but the switched to get to test if it would work that way. I
can get the initial sid in cookie mode but then lose it after I click on a
link and a cookie is never sent. In get mode it works fine.

Check www.acns-online.com/shop/index.php3 to verify.

Chuck

----- Original Message -----
From: "John Sutton" <john <email protected>>
To: "A.C.N.S. Information and News" <infomail <email protected>>
Cc: <phplib <email protected>>
Sent: Tuesday, January 30, 2001 12:16 PM
Subject: Re: [phplib] PHPLib and frames examples?

> Yes, it's a complete bitch because AKAIK each frame will submit the same
> session cookie, there is no general way to identify which frame has
submitted
> which submission, there is no guaranteed *order* in which
> a browser will make the multiple submissions involved when it loads the
frames
> in a frameset, and (the real killer) the submissions can run concurrently.
>
> Careful analysis and coding can get you over the first three hurdles, the
real
> killer that I encountered was dealing with the concurency problem. I
solved
> this by overriding get_lock() and release_lock() in session.inc (in an old
> version of phplib, nowadays in ct_sql.inc and friends):
>
> // Overriding these two functions renders $database_lock_semaphore
> // redundant.
> function get_lock() {
> $lockstr = 'WDBA/'.config_info('database').'/'.$this->id;
> while (!mysql_result($this->db->query("select
get_lock('$lockstr',5)"),0,0))
> ;
> }
>
> function release_lock() {
> $lockstr = 'WDBA/'.config_info('database').'/'.$this->id;
> $this->db->query("select release_lock('$lockstr')");
> }
>
> The problem with the default implementation of these functions is that
there was
> no easy way to get the sessionid into $database_lock_semaphore. At least,
that
> was true when they were in session.inc. Maybe it's possible now that they
have
> been moved into ct_sql.inc?
>
> The key is that you must lock the db with the sessionid so that multiple
> concurrent hits from a frameset cannot interfere with each other.
>
> YMMV!
>
> On Tue, 30 Jan 2001, you wrote:
> >
> > Is there anyone out there that has some examples of using phplib with
frames? If so could you please send 'em my way. I'm having unbelievable
problems with getting phplib to work correctly with frames. Thanks.
> >
> > Chuck
> >
>
> --
>
> ***************************************************
> John Sutton
> SCL Computer Services
> URL http://www.scl.co.uk/
> Tel. +44 (0) 1239 621021
> ***************************************************

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