/**
* Check input, strip slashes etc. set alert, if input is not ok.
*
* @return boolean Input ok, true/false
*/
function checkInput()
{
global $lng;
$lng->loadLanguageModule("feed");
$_POST[$this->getPostVar()] = ilUtil::stripSlashes($_POST[$this->getPostVar()]);
// remove safari pseudo protocol
if (substr($_POST[$this->getPostVar()], 0, 5) == "feed:") {
$_POST[$this->getPostVar()] = "http:" . substr($_POST[$this->getPostVar()], 5);
}
// add missing http://
if (!is_int(strpos($_POST[$this->getPostVar()], "://"))) {
$_POST[$this->getPostVar()] = "http://" . $_POST[$this->getPostVar()];
}
// check required
if ($this->getRequired() && trim($_POST[$this->getPostVar()]) == "") {
$this->setAlert($lng->txt("msg_input_is_required"));
return false;
}
// check feed url
$url = $_POST[$this->getPostVar()];
include_once "./Services/Feeds/classes/class.ilExternalFeed.php";
$check = ilExternalFeed::_checkUrl($url);
// try to determine a feed url, if we failed here
if ($check !== true) {
$url2 = ilExternalFeed::_determineFeedUrl($url);
$check2 = ilExternalFeed::_checkUrl($url2);
if ($check2 === true) {
$_POST[$this->getPostVar()] = $url2;
$check = true;
}
}
// if check failed, output error message
if ($check !== true) {
$check = str_replace("MagpieRSS:", "", $check);
$this->setAlert($lng->txt("feed_no_valid_url") . "<br />" . $check);
return false;
}
return true;
}
/**
* Determine Feed Url
*
* @param $a_url URL that
*/
static function _determineFeedUrl($a_url)
{
if (!defined('IL_FEED_PROXY_HOST')) {
if (ilProxySettings::_getInstance()->isActive()) {
define('IL_FEED_PROXY_HOST', ilProxySettings::_getInstance()->getHost());
define('IL_FEED_PROXY_PORT', ilProxySettings::_getInstance()->getPort());
} else {
define('IL_FEED_PROXY_HOST', "");
define('IL_FEED_PROXY_PORT', "");
}
}
$res = @fopen($a_url, "r");
if (!$res) {
return "";
}
$contents = '';
while (!feof($res)) {
$contents .= fread($res, 8192);
}
fclose($res);
return ilExternalFeed::_getRSSLocation($contents, $a_url);
}
