/**
* Process incoming parameters and display the page.
*
* @return void
* @access public
*/
public function launch()
{
global $interface;
global $configArray;
if (isset($_REQUEST['proxyitem'])) {
$url = $configArray['OpenURL']['url'];
// Strip main directory
$url = substr($url, 0, strrpos($url, '/'));
$url .= $_REQUEST['proxyitem'];
$request = new Proxy_Request();
$request->setMethod(HTTP_REQUEST_METHOD_GET);
$request->setURL($url);
$request->addHeader('X-Forwarded-For', $_SERVER['REMOTE_ADDR']);
if (isset($configArray['OpenURL']['language'][$interface->lang])) {
$request->addCookie('user-Profile', '%2B%2B%2B' . $configArray['OpenURL']['language'][$interface->lang]);
}
$result = $request->sendRequest();
if (PEAR::isError($result)) {
die($result->getMessage() . "\n");
}
foreach ($request->getResponseHeader() as $name => $value) {
if (strcasecmp($name, 'content-type') == 0 || strcasecmp($name, 'content-length') == 0) {
header("{$name}: {$value}");
}
}
echo $request->getResponseBody();
exit;
}
header('Content-type: text/html; charset=UTF-8');
header('Cache-Control: no-cache, must-revalidate');
// HTTP/1.1
header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
// Date in the past
if (!isset($_REQUEST['openurl']) || !$_REQUEST['openurl']) {
die("Missing parameter 'openurl'");
return;
}
$url = $configArray['OpenURL']['url'];
$baseURL = substr($url, 0, strrpos($url, '/'));
$proxyURL = $configArray['Site']['url'] . '/AJAX/SFXMenu?action=SFXMenu&proxyitem=';
if (substr($_REQUEST['openurl'], 0, 1) != '?') {
$url .= '?';
}
$url .= $_REQUEST['openurl'];
$request = new Proxy_Request();
$request->setMethod(HTTP_REQUEST_METHOD_GET);
$request->setURL($url);
$request->addHeader('X-Forwarded-For', $_SERVER['REMOTE_ADDR']);
if (isset($configArray['OpenURL']['language'][$interface->lang])) {
$request->addCookie('user-Profile', '%2B%2B%2B' . $configArray['OpenURL']['language'][$interface->lang]);
}
// Perform request and die on error
$result = $request->sendRequest();
if (PEAR::isError($result)) {
die($result->getMessage() . "\n");
}
$html = new simple_html_dom();
$html->load($request->getResponseBody());
echo <<<EOF
<html>
<head>
EOF;
// Get style sheets and scripts
foreach ($html->find('head link') as $link) {
if (substr($link->href, 0, 1) == '/') {
$link->href = $proxyURL . urlencode($link->href);
} elseif (strcasecmp(substr($link->href, 0, strlen($baseURL)), $baseURL) == 0) {
$link->href = $proxyURL . urlencode(substr($link->href, strlen($baseURL)));
}
echo "{$link}\n";
}
foreach ($html->find('head script') as $script) {
if (substr($script->src, 0, 1) == '/' || substr($script->src, 0, 1) == '.') {
$script->src = $proxyURL . urlencode($script->src);
} else {
$src = parse_url($script->src);
// proxify only if not secure url
if (strcasecmp($src['scheme'], 'http') == 0) {
$script->src = $proxyURL . urlencode($src['path']);
}
}
echo "{$script}\n";
}
echo <<<EOF
<script type="text/javascript">
function openWindow(obj, form_name)
{
var form = \$("form[name=" + form_name + "]");
var url = form.attr('action');
var params = '';
form.find("input[type=hidden]").each(function() {
if (params) {
params += '&';
}
params += encodeURIComponent(\$(this).attr('name')) + '=' + encodeURIComponent(\$(this).attr('value'));
});
var win = window.open();
win.location = url + '?' + params;
}
</script>
</head>
<body>
EOF;
$container = $html->find('#basic_target_list_container', 0);
if (!$container) {
$container = $html->find('#advanced_target_list_container', 0);
}
if ($container) {
// We have some actual items to display
$table = $container->parent();
foreach ($table->find('img') as $img) {
if (substr($img->src, 0, 1) == '/') {
$img->src = $proxyURL . urlencode($img->src);
}
}
foreach ($table->find('form') as $form) {
if (substr($form->action, 0, 1) == '/') {
$form->action = $baseURL . $form->action;
}
}
echo $table;
}
echo <<<EOF
</body>
</html>
EOF;
}
/**
* Make an OAI-PMH request. Die if there is an error; return a SimpleXML object
* on success.
*
* @param string $verb OAI-PMH verb to execute.
* @param array $params GET parameters for ListRecords method.
*
* @return object SimpleXML-formatted response.
* @access private
*/
private function _sendRequest($verb, $params = array())
{
// Debug:
if ($this->_verbose) {
echo "Sending request: verb = {$verb}, params = ";
print_r($params);
}
// Set up retry loop:
while (true) {
// Set up the request:
$request = new Proxy_Request();
$request->setMethod(HTTP_REQUEST_METHOD_GET);
$request->setURL($this->_baseURL);
// Load request parameters:
$request->addQueryString('verb', $verb);
foreach ($params as $key => $value) {
$request->addQueryString($key, $value);
}
// Perform request and die on error:
$result = $request->sendRequest();
if (PEAR::isError($result)) {
die($result->getMessage() . "\n");
}
// Check for 503 response.
if ($request->getResponseCode() == 503) {
$delay = $request->getResponseHeader('Retry-After');
if ($delay > 0) {
if ($this->_verbose) {
echo "Received 503 response; waiting {$delay} seconds...\n";
}
sleep($delay);
}
} else {
// If we didn't get a 503, we can leave the retry loop:
break;
}
}
// If we got this far, there was no error -- send back response.
$response = $request->getResponseBody();
return $this->_processResponse($response);
}
