/**
* Checks the argument list from the POST/GET query.
*
* Checks if the required arguments are present, and no invalid extra
* arguments are present. All valid arguments must be in either the
* required or optional array.
*
* @param array requiredArgs Array of required argument names.
* @param array optionalArgs Array of optional, but valid argument names.
*/
private function checkArguments($requiredArgs = array(), $optionalArgs = array())
{
$requiredArgs[] = 'verb';
/* Checks (essentially), if there are more arguments in the query string
than in PHP's returned array, if so there were duplicate arguments,
which is not allowed. */
if ($_SERVER['REQUEST_METHOD'] == 'GET' && urldecode($_SERVER['QUERY_STRING']) != urldecode(http_build_query($this->query))) {
$this->throwError(self::OAI_ERR_BAD_ARGUMENT, "Duplicate arguments in request.");
}
$keys = array_keys($this->query);
foreach (array_diff($requiredArgs, $keys) as $arg) {
$this->throwError(self::OAI_ERR_BAD_ARGUMENT, "Missing required argument {$arg}.");
}
foreach (array_diff($keys, $requiredArgs, $optionalArgs) as $arg) {
$this->throwError(self::OAI_ERR_BAD_ARGUMENT, "Unknown argument {$arg}.");
}
$from = $this->_getParam('from');
$until = $this->_getParam('until');
$fromGran = OaiPmhRepository_Date::getGranularity($from);
$untilGran = OaiPmhRepository_Date::getGranularity($until);
if ($from && !$fromGran) {
$this->throwError(self::OAI_ERR_BAD_ARGUMENT, "Invalid date/time argument.");
}
if ($until && !$untilGran) {
$this->throwError(self::OAI_ERR_BAD_ARGUMENT, "Invalid date/time argument.");
}
if ($from && $until && $fromGran != $untilGran) {
$this->throwError(self::OAI_ERR_BAD_ARGUMENT, "Date/time arguments of differing granularity.");
}
$metadataPrefix = $this->_getParam('metadataPrefix');
if ($metadataPrefix && !array_key_exists($metadataPrefix, $this->metadataFormats)) {
$this->throwError(self::OAI_ERR_CANNOT_DISSEMINATE_FORMAT);
}
}
