/**
* This function attempts to validate an XML string against the specified schema. It will parse the string into a
* DOM document and validate this document against the schema.
*
* Note that this function returns values that are evaluated as a logical true, both when validation works and when
* it doesn't. Please use strict comparisons to check the values returned.
*
* @param string|\DOMDocument $xml The XML string or document which should be validated.
* @param string $schema The filename of the schema that should be used to validate the document.
*
* @return boolean|string Returns a string with errors found if validation fails. True if validation passes ok.
* @throws \InvalidArgumentException If $schema is not a string, or $xml is neither a string nor a \DOMDocument.
*
* @author Olav Morken, UNINETT AS <*****@*****.**>
*/
public static function isValid($xml, $schema)
{
if (!(is_string($schema) && (is_string($xml) || $xml instanceof \DOMDocument))) {
throw new \InvalidArgumentException('Invalid input parameters.');
}
\SimpleSAML_XML_Errors::begin();
if ($xml instanceof \DOMDocument) {
$dom = $xml;
$res = true;
} else {
$dom = new \DOMDocument();
$res = $dom->loadXML($xml);
}
if ($res) {
$config = \SimpleSAML_Configuration::getInstance();
$schemaPath = $config->resolvePath('schemas') . '/';
$schemaFile = $schemaPath . $schema;
$res = $dom->schemaValidate($schemaFile);
if ($res) {
\SimpleSAML_XML_Errors::end();
return true;
}
$errorText = "Schema validation failed on XML string:\n";
} else {
$errorText = "Failed to parse XML string for schema validation:\n";
}
$errors = \SimpleSAML_XML_Errors::end();
$errorText .= \SimpleSAML_XML_Errors::formatErrors($errors);
return $errorText;
}
/**
* This function attempts to validate an XML string against the specified schema.
*
* It will parse the string into a DOM document and validate this document against the schema.
*
* @param $xml The XML string or document which should be validated.
* @param $schema The schema which should be used.
* @return Returns a string with the errors if validation fails. An empty string is
* returned if validation passes.
* @deprecated
*/
public static function validateXML($xml, $schema)
{
assert('is_string($xml) || $xml instanceof DOMDocument');
assert('is_string($schema)');
SimpleSAML_XML_Errors::begin();
if ($xml instanceof DOMDocument) {
$dom = $xml;
$res = TRUE;
} else {
$dom = new DOMDocument();
$res = $dom->loadXML($xml);
}
if ($res) {
$config = SimpleSAML_Configuration::getInstance();
$schemaPath = $config->resolvePath('schemas') . '/';
$schemaFile = $schemaPath . $schema;
$res = $dom->schemaValidate($schemaFile);
if ($res) {
SimpleSAML_XML_Errors::end();
return '';
}
$errorText = "Schema validation failed on XML string:\n";
} else {
$errorText = "Failed to parse XML string for schema validation:\n";
}
$errors = SimpleSAML_XML_Errors::end();
$errorText .= SimpleSAML_XML_Errors::formatErrors($errors);
return $errorText;
}
$t->data['url'] = $url;
/* We accept http or https URLs */
if (substr($url, 0, 7) !== 'http://' && substr($url, 0, 8) !== 'https://') {
$t->data['status'] = 'invalidurl';
$t->show();
exit;
}
/* Attempt to download the metadata. */
$metadata = file_get_contents($url);
if ($metadata === FALSE) {
$t->data['status'] = 'nodownload';
$t->show();
exit;
}
/* Load the metadata into an XML document. */
SimpleSAML_XML_Errors::begin();
$doc = new DOMDocument();
$doc->validateOnParse = FALSE;
$doc->strictErrorChecking = TRUE;
try {
$ok = $doc->loadXML($metadata);
if ($ok !== TRUE) {
$doc = NULL;
}
} catch (DOMException $e) {
$doc = NULL;
}
$errors = SimpleSAML_XML_Errors::end();
if ($doc === NULL || count($errors) > 0) {
$t->data['status'] = 'invalidxml';
$t->data['errortext'] = SimpleSAML_XML_Errors::formatErrors($errors);