Stuck with session management
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xravenx
Joined: 2007-10-22
Posts: 3 |
Posted: Mon, 2007-10-22 09:17
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I'm trying to integrate Gallery 2 with my PHP/mySQL driven site. Right now, my emApp uses a users table where there's a user_num (unique to each user), user_id (login name). These variables are passed into the session array once a user has logged in to my website. I have a gallery.php file which has the following code:
<?php
session_name('MySessionName'); // Choose session name
session_start(); // Initialize a session
require_once('./includes/g2embed.inc.php');
?>
My g2embed.inc.php file has a create user on-the-fly as seen here:
<?php
$data = runGallery();
$data['title'] = (isset($data['title']) && !empty($data['title'])) ? $data['title'] : 'Gallery';
if (isset($data['bodyHtml'])) {
print <<<EOF
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html>
<head>
<title>{$data['title']}</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
{$data['javascript']}
{$data['css']}
</head>
<body>
{$data['bodyHtml']}
</body>
</html>
EOF;
}
function runGallery() {
require_once('./gallery2/embed.php');
$data = array();
$emAppUserId = $_SESSION['user_num'];
$embedUri = '/gallery.php';
$g2Uri = '/gallery2/';
$loginRedirect = '/index.php';
if (isset($_SESSION['user_id'])) {
// if user is logged in, set user ID to emApp's session user_id
$uid = $_SESSION['user_id'];
} else {
// if anonymous user, set g2 activeUser to ''
$uid = '';
}
$ret = GalleryEmbed::init(array('embedUri' => $embedUri, 'g2Uri' => $g2Uri, 'fullInit' => true, 'loginRedirect' => $loginRedirect, 'activeUserId' => $emAppUserId));
// Display login link
GalleryCapabilities::set('login', true);
// user interface: you could disable sidebar in G2 and get it as separate HTML to put it into a block
// GalleryCapabilities::set('showSidebarBlocks', false);
if ($ret) {
/* Error! */
/* Did we get an error because the user doesn't exist in g2 yet? */
$ret2 = GalleryEmbed::isExternalIdMapped($emAppUserId, 'GalleryUser');
if ($ret2 && $ret2->getErrorCode() & ERROR_MISSING_OBJECT) {
/* The user does not exist in G2 yet. Create in now on-the-fly */
$ret = GalleryEmbed::createUser($emAppUserId, array('username' => $uid));
if ($ret) {
/* An error during user creation. Not good, print an error or do whatever is appropriate
* in your emApp when an error occurs */
print "An error occurred during the on-the-fly user creation <br>";
print $ret->getAsHtml();
exit;
}
} else {
/* The error we got wasn't due to a missing user, it was a real error */
if ($ret2) {
print "An error occurred while checking if a user already exists<br>";
print $ret2->getAsHtml();
}
print "An error occurred while trying to initialize G2<br>";
print $ret->getAsHtml();
exit;
}
}
/* At this point we know that either the user either existed already before or that it was just created
* proceed with the normal request to G2 */
$g2moddata = GalleryEmbed::handleRequest();
// show error message if isDone is not defined
if (!isset($g2moddata['isDone'])) {
$data['bodyHtml'] = 'isDone is not defined, something very bad must have happened.';
return $data;
}
// exit if it was an immediate view / request (G2 already outputted some data)
if ($g2moddata['isDone']) {
exit;
}
// put the body html from G2 into the xaraya template
$data['bodyHtml'] = isset($g2moddata['bodyHtml']) ? $g2moddata['bodyHtml'] : '';
// get the page title, javascript and css links from the <head> html from G2
$title = ''; $javascript = array(); $css = array();
if (isset($g2moddata['headHtml'])) {
list($data['title'], $css, $javascript) = GalleryEmbed::parseHead($g2moddata['headHtml']);
$data['headHtml'] = $g2moddata['headHtml'];
}
/* Add G2 javascript */
$data['javascript'] = '';
if (!empty($javascript)) {
foreach ($javascript as $script) {
$data['javascript'] .= "\n".$script;
}
}
/* Add G2 css */
$data['css'] = '';
if (!empty($css)) {
foreach ($css as $style) {
$data['css'] .= "\n".$style;
}
}
// sidebar block
if (isset($g2moddata['sidebarBlocksHtml']) && !empty($g2moddata['sidebarBlocksHtml'])) {
$data['sidebarHtml'] = $g2moddata['sidebarBlocksHtml'];
}
return $data;
}
?>
My logout.php script has this:
<?php
// Log out of Gallery
require_once('./gallery2/embed.php');
$ret = GalleryEmbed::logout();
?>
My problem is this: using phpMyAdmin, I've been monitoring the g2_SessionMap table. As a note, the documentation provided for writing your own integration is very complete but very very difficult to follow if you are not an expert at PHP. I had to spend several hours to get to where I am right now. Anyhow, any help would be appreciated. I really really love Gallery and would be very happy if I can integrate it fully with my website. Thanks in advance! |
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Posts: 32356
@logout: don't ignore $ret. you should check it. e.g. with
if ($ret) {
//log the error, (error can be fetched with $ret->getAsHtml() )
// while developing, just print the error:
print $ret->getAsHtml();
};
@sessions:
> But, if the user continues to navigate any page within the gallery, it generates another session in the g2_SessionMap table.
did the user successfully receive a cookie when logged in for the first time? maybe output starts before g2 can set the cookie header.
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Documentation: Support / Troubleshooting | Installation, Upgrade, Configuration and Usage
Posts: 3
Thanks for the tips valiant.
I got it working. It seems I can't use require_once('./includes/g2embed.inc.php');
It breaks it.
One file must contain all the code for embed display of the gallery.
Thanks so much again!