/**
* Download a file
* Runs through various permissions checks to ensure user has access
*
* @return void
*/
public function downloadTask()
{
// Incoming
$id = Request::getInt('id', 0);
$alias = Request::getVar('alias', '');
$d = Request::getVar('d', 'inline');
//make sure we have a proper disposition
if ($d != "inline" && $d != "attachment") {
$d = "inline";
}
// Load the resource
$resource = new Resource($this->database);
if ($alias && !$resource->loadAlias($alias)) {
App::abort(404, Lang::txt('COM_RESOURCES_RESOURCE_NOT_FOUND'));
return;
} elseif (substr($id, 0, 4) == '9999') {
$resource->id = $id;
$resource->standalone = 1;
$resource->path = null;
$resource->created = Date::of('now')->format('Y-m-d 00:00:00');
} elseif (!$resource->load($id)) {
App::abort(404, Lang::txt('COM_RESOURCES_RESOURCE_NOT_FOUND'));
return;
}
// Check if the resource is for logged-in users only and the user is logged-in
if ($token = Request::getVar('token', '', 'get')) {
$token = base64_decode($token);
$key = App::hash(@$_SERVER['HTTP_USER_AGENT']);
$crypter = new \Hubzero\Encryption\Encrypter(new \Hubzero\Encryption\Cipher\Simple(), new \Hubzero\Encryption\Key('simple', $key, $key));
$session_id = $crypter->decrypt($token);
$session = \Hubzero\Session\Helper::getSession($session_id);
$user = User::getInstance($session->userid);
$user->guest = 0;
$user->id = $session->userid;
$user->usertype = $session->usertype;
} else {
$user = User::getRoot();
}
if ($resource->access == 1 && $user->get('guest')) {
App::abort(403, Lang::txt('COM_RESOURCES_ALERTNOTAUTH'));
return;
}
// Check if the resource is "private" and the user is allowed to view it
if ($resource->access == 4 || $resource->access == 3 || !$resource->standalone) {
if ($this->checkGroupAccess($resource, $user)) {
App::abort(403, Lang::txt('COM_RESOURCES_ALERTNOTAUTH'));
return;
}
}
if ($resource->standalone && !$resource->path) {
$resource->path = DS . trim($this->config->get('uploadpath', '/site/resources'), DS) . Html::build_path($resource->created, $resource->id, '') . DS . 'media' . DS . Request::getVar('file');
}
$resource->path = trim($resource->path);
// Ensure we have a path
// Ensure resource is published - stemedhub #472
if (empty($resource->path) && $resource->published != 1) {
App::abort(404, Lang::txt('COM_RESOURCES_FILE_NOT_FOUND'));
return;
}
// Get the configured upload path
$base_path = $this->config->get('uploadpath', '/site/resources');
if ($base_path) {
$base_path = DS . trim($base_path, DS);
}
// Does the path start with a slash?
if (substr($resource->path, 0, 1) != DS) {
$resource->path = DS . $resource->path;
// Does the beginning of the $resource->path match the config path?
if (substr($resource->path, 0, strlen($base_path)) == $base_path) {
// Yes - this means the full path got saved at some point
} else {
// No - append it
$resource->path = $base_path . $resource->path;
}
}
// Add root path
$filename = PATH_APP . $resource->path;
// Ensure the file exist
if (!file_exists($filename)) {
App::abort(404, Lang::txt('COM_RESOURCES_FILE_NOT_FOUND') . ' ' . $filename);
return;
}
$ext = strtolower(\Filesystem::extension($filename));
if (!in_array($ext, array('jpg', 'jpeg', 'jpe', 'gif', 'png', 'pdf', 'htm', 'html', 'txt', 'json', 'xml'))) {
$d = 'attachment';
}
// Initiate a new content server and serve up the file
$xserver = new \Hubzero\Content\Server();
$xserver->filename($filename);
$xserver->disposition($d);
$xserver->acceptranges(false);
// @TODO fix byte range support
if (!$xserver->serve()) {
// Should only get here on error
throw new Exception(Lang::txt('COM_RESOURCES_SERVER_ERROR'), 500);
} else {
exit;
}
return;
}
/**
* Generate a Windows tool invoke URL to redirect to
*
* @param string $option Name of the component
* @return void
*/
public function invoke($option)
{
$no_html = Request::getInt('no_html', 0);
$response = new StdClass();
$response->success = false;
$response->message = Lang::txt('No invoke URL found.');
// Check for an imconing token.
if ($token = Request::getVar('token', '', 'get')) {
$dtoken = base64_decode($token);
$key = App::hash(@$_SERVER['HTTP_USER_AGENT']);
$crypter = new \Hubzero\Encryption\Encrypter(new \Hubzero\Encryption\Cipher\Simple(), new \Hubzero\Encryption\Key('simple', $key, $key));
$session_id = $crypter->decrypt($dtoken);
$session = \Hubzero\Session\Helper::getSession($session_id);
$user = User::getInstance($session->userid);
$user->set('guest', 0);
$user->set('id', $session->userid);
$user->set('username', $session->username);
$ip = $session->ip;
} else {
$user = User::getInstance();
$ip = Request::ip();
}
// Is the user validated?
if ($user->isGuest()) {
$response->message = Lang::txt('Login is required to perform this action.');
} else {
$appid = Request::getVar('appid');
// Generate the URL
$url = $this->generateInvokeUrl($option, $appid, $user, $ip);
if ($url) {
if (!$token) {
$session = App::get('session');
$session_id = $session->getId();
$key = App::hash(@$_SERVER['HTTP_USER_AGENT']);
$crypter = new \Hubzero\Encryption\Encrypter(new \Hubzero\Encryption\Cipher\Simple(), new \Hubzero\Encryption\Key('simple', $key, $key));
$token = base64_encode($crypter->encrypt($session_id));
}
$rurl = rtrim($this->params->get('invoke_url', 'http://wapps.hubzero.org'), '/') . '/v1?';
//standaloneUrl=' . $url;
$params = array();
$params[] = 'token=' . $token;
if ($appid) {
$params[] = 'appid=' . $appid;
}
$params[] = 'standaloneUrl=' . $url;
$rurl .= implode('&', $params);
$response->success = true;
$response->message = $rurl;
if (!$no_html) {
$this->view('invoke', 'display')->set('url', $rurl)->set('rurl', $_SERVER['HTTP_REFERER'])->display();
exit;
App::redirect($url);
}
}
}
if (!$no_html) {
App::abort(404, Lang::txt('No invoke URL found.'));
}
$response = json_encode($response);
if ($callback = Request::getVar('callback')) {
$response = $callback . '(' . $response . ')';
}
echo $response;
exit;
}
