How to intercept and redirect each request on owncloud - redirect

Question

I' struggling with a simple problem on owncloud 7.0
I'm creation an app that have to check a condition and redirect to a page to validate something. My target is to disable service usage until a condition is ok.
In the nominal scenario, user log in, system redirect user to the validation page if condition is not verified. So I use postLogin hook.
But if user try to change page without validating, I have to catch him and redirect it back to the validation page.
I have tried Middleware (owncloud interceptor), but they are not global, so second scenario fails.
Now I'm working with app loading and do something like
$app = new MyApp();
$c = $app->getContainer();
if ( $c->isLoggedIn() ) {
$requestedPath = path($_SERVER['REQUEST_URI']);
$redirectPath = $c->getServer()->getURLGenerator()->linkToRoute('myapp.page.validate');
$refererPath = path($_SERVER['HTTP_REFERER']);
if ( $requestedPath !== $redirectPath && $redirectPath !== $refererPath ) {
$location = $c->getServer()->getRouter()->generate('myapp.page.validate');
header('Location: ' . $location);
exit();
}
}
function path($url) {
$urlArray = parse_url($url);
return $urlArray['path'];
}
It works fine for the first case, but I go into several redirections in the second case.
I think it must exist a better solution. Somebody has an idea ?
PS: I have exposed my case on IRC channel without success to interest someone :)

Answer 1

You might be able to do this using appinfo/app.php if you've registered your app as type authentication in appinfo/info.xml. This should basically look like the following code, however this obviously needs further tuning for your use-case.
info.xml:
<?xml version="1.0"?>
<info>
<id>appname</id>
<name>Appname</name>
<description>Lorem Ipsum.</description>
<licence>AGPL</licence>
<author>Your Name</author>
<require>6.0.3</require>
<types>
<authentication/>
</types>
</info>
app.php:
<?php
namespace OCA\appname\AppInfo;
use \OCP\User;
/**
* Implement your code here
* #return bool
*/
function conditionMatch() {
return true;
}
// Intercept all requests which have not already been matched
if ($_SESSION['alreadyMatched'] !== true) {
if(conditionMatch()) {
$_SESSION['alreadyMatched'] = true;
} else {
// The session has not met the condition - enter your code here
exit();
}
}