Skip to content
Snippets Groups Projects
Commit 2a97ea8f authored by Olav Morken's avatar Olav Morken
Browse files

metarefresh: Also reuse old metadata when fetching metadata fails. 

Thanks to Dick Visser for implementing this!

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@3020 44740490-163a-0410-bde0-09ae8108e29a
parent 47f18928
No related branches found
No related tags found
No related merge requests found
Hide whitespace changes
Inline Side-by-side
modules/metarefresh/lib/MetaLoader.php
+ 115
− 75
View file @ 2a97ea8f
......@@ -45,11 +45,92 @@ class sspmod_metarefresh_MetaLoader {
*/
public function loadSource($source) {
// Build new HTTP context
$context = $this->createContext($source);
// GET!
try {
list($data, $responseHeaders) = SimpleSAML_Utilities::fetch($source['src'], $context, TRUE);
} catch(Exception $e) {
SimpleSAML_Logger::warning('metarefresh: ' . $e->getMessage());
}
// We have response headers, so the request succeeded
if(isset($responseHeaders)) {
// 200 OK
if(preg_match('@^HTTP/1\.[01]\s200\s@', $responseHeaders[0])) {
if (isset($source['conditionalGET']) && $source['conditionalGET']) {
// Stale or no metadata, so a fresh copy
SimpleSAML_Logger::debug('Downloaded fresh copy');
}
$entities = $this->loadXML($data, $source);
foreach($entities as $entity) {
if(isset($source['blacklist'])) {
if(!empty($source['blacklist']) && in_array($entity->getEntityID(), $source['blacklist'])) {
SimpleSAML_Logger::info('Skipping "' . $entity->getEntityID() . '" - blacklisted.' . "\n");
continue;
}
}
if(isset($source['whitelist'])) {
if(!empty($source['whitelist']) && !in_array($entity->getEntityID(), $source['whitelist'])) {
SimpleSAML_Logger::info('Skipping "' . $entity->getEntityID() . '" - not in the whitelist.' . "\n");
continue;
}
}
if(array_key_exists('validateFingerprint', $source) && $source['validateFingerprint'] !== NULL) {
if(!$entity->validateFingerprint($source['validateFingerprint'])) {
SimpleSAML_Logger::info('Skipping "' . $entity->getEntityId() . '" - could not verify signature.' . "\n");
continue;
}
}
$template = NULL;
if (array_key_exists('template', $source)) $template = $source['template'];
$this->addMetadata($source['src'], $entity->getMetadata1xSP(), 'shib13-sp-remote', $template);
$this->addMetadata($source['src'], $entity->getMetadata1xIdP(), 'shib13-idp-remote', $template);
$this->addMetadata($source['src'], $entity->getMetadata20SP(), 'saml20-sp-remote', $template);
$this->addMetadata($source['src'], $entity->getMetadata20IdP(), 'saml20-idp-remote', $template);
$attributeAuthorities = $entity->getAttributeAuthorities();
if (!empty($attributeAuthorities)) {
$this->addMetadata($source['src'], $attributeAuthorities[0], 'attributeauthority-remote', $template);
}
}
$this->saveState($source, $responseHeaders);
}
// 304 response
if(preg_match('@^HTTP/1\.[01]\s304\s@', $responseHeaders[0])) {
SimpleSAML_Logger::debug('Received HTTP 304 (Not Modified) - attempting to re-use cached metadata');
$this->addCachedMetadata($source);
}
} else {
// No response headers, this means the request failed in some way, so re-use old data
SimpleSAML_Logger::debug('No response from ' . $source['src'] . ' - attempting to re-use cached metadata');
$this->addCachedMetadata($source);
}
}
/**
* Create HTTP context, with any available caches taken into account
*/
private function createContext($source) {
$context = NULL;
$config = SimpleSAML_Configuration::getInstance();
$name = $config->getString('technicalcontact_name', NULL);
$mail = $config->getString('technicalcontact_email', NULL);
$rawheader = "User-Agent: SimpleSAMLphp metarefresh, run by $name <$mail>\r\n";
if (isset($source['conditionalGET']) && $source['conditionalGET']) {
......@@ -67,24 +148,12 @@ class sspmod_metarefresh_MetaLoader {
}
}
// Build new HTTP context
$context = array('http' => array('header' => $rawheader));
// GET!
try {
list($data, $responseHeaders) = SimpleSAML_Utilities::fetch($source['src'], $context, TRUE);
} catch(Exception $e) {
SimpleSAML_Logger::warning('metarefresh: Failed to retrieve metadata. ' . $e->getMessage());
}
//SimpleSAML_Logger::debug('All response headers: ' . var_export($responsHeaders,1));
$status = $responseHeaders[0];
return array('http' => array('header' => $rawheader));
}
if(preg_match('@^HTTP/1\.[01]\s304\s@', $status ) && isset($this->oldMetadataSrc)) {
// Not-Modified. This could only have happened if 'conditionalGET' was used.
SimpleSAML_Logger::debug('Received \'' . $status . '\', re-using cached metadata');
private function addCachedMetadata($source) {
if(isset($this->oldMetadataSrc)) {
foreach(self::$types as $type) {
foreach($this->oldMetadataSrc->getMetadataSet($type) as $entity) {
if(array_key_exists('metarefresh:src', $entity)) {
......@@ -95,64 +164,15 @@ class sspmod_metarefresh_MetaLoader {
}
}
}
} else {
// Stale or no metadata, so a fresh copy
if (isset($source['conditionalGET']) && $source['conditionalGET']) {
SimpleSAML_Logger::debug('Downloaded fresh copy');
}
$entities = array();
try{
$doc = new DOMDocument();
$res = $doc->loadXML($data);
if($res !== TRUE) {
throw new Exception('Failed to read XML from ' . $source['src']);
}
if($doc->documentElement === NULL) throw new Exception('Opened file is not an XML document: ' . $source['src']);
$entities = SimpleSAML_Metadata_SAMLParser::parseDescriptorsElement($doc->documentElement);
} catch(Exception $e) {
SimpleSAML_Logger::warning('metarefresh: Failed to retrieve metadata. ' . $e->getMessage());
}
foreach($entities as $entity) {
if(isset($source['blacklist'])) {
if(!empty($source['blacklist']) && in_array($entity->getEntityID(), $source['blacklist'])) {
SimpleSAML_Logger::info('Skipping "' . $entity->getEntityID() . '" - blacklisted.' . "\n");
continue;
}
}
if(isset($source['whitelist'])) {
if(!empty($source['whitelist']) && !in_array($entity->getEntityID(), $source['whitelist'])) {
SimpleSAML_Logger::info('Skipping "' . $entity->getEntityID() . '" - not in the whitelist.' . "\n");
continue;
}
}
if(array_key_exists('validateFingerprint', $source) && $source['validateFingerprint'] !== NULL) {
if(!$entity->validateFingerprint($source['validateFingerprint'])) {
SimpleSAML_Logger::info('Skipping "' . $entity->getEntityId() . '" - could not verify signature.' . "\n");
continue;
}
}
}
}
$template = NULL;
if (array_key_exists('template', $source)) $template = $source['template'];
$this->addMetadata($source['src'], $entity->getMetadata1xSP(), 'shib13-sp-remote', $template);
$this->addMetadata($source['src'], $entity->getMetadata1xIdP(), 'shib13-idp-remote', $template);
$this->addMetadata($source['src'], $entity->getMetadata20SP(), 'saml20-sp-remote', $template);
$this->addMetadata($source['src'], $entity->getMetadata20IdP(), 'saml20-idp-remote', $template);
$attributeAuthorities = $entity->getAttributeAuthorities();
if (!empty($attributeAuthorities)) {
$this->addMetadata($source['src'], $attributeAuthorities[0], 'attributeauthority-remote', $template);
}
}
}
/**
* Store caching state data for a source
*/
private function saveState($source, $responseHeaders) {
// Save state for this src
if (isset($source['conditionalGET']) && $source['conditionalGET']) {
// Headers section
......@@ -173,10 +193,31 @@ class sspmod_metarefresh_MetaLoader {
}
}
/**
* This function write the state array back to disk
* Parse XML metadata and return entities
*/
public function writeState() {
private function loadXML($data, $source) {
$entities = array();
try {
$doc = new DOMDocument();
$res = $doc->loadXML($data);
if($res !== TRUE) {
throw new Exception('Failed to read XML from ' . $source['src']);
}
if($doc->documentElement === NULL) throw new Exception('Opened file is not an XML document: ' . $source['src']);
$entities = SimpleSAML_Metadata_SAMLParser::parseDescriptorsElement($doc->documentElement);
} catch(Exception $e) {
SimpleSAML_Logger::warning('metarefresh: Failed to retrieve metadata. ' . $e->getMessage());
}
return $entities;
}
/**
* This function writes the state array back to disk
*/
public function writeState() {
if($this->changed) {
SimpleSAML_Logger::debug('Writing: ' . $this->stateFile);
SimpleSAML_Utilities::writeFile(
......@@ -188,6 +229,7 @@ class sspmod_metarefresh_MetaLoader {
}
}
/**
* This function writes the metadata to stdout.
*/
......@@ -213,10 +255,8 @@ class sspmod_metarefresh_MetaLoader {
echo("\n");
}
}
/**
* This function adds metadata from the specified file to the list of metadata.
* This function will return without making any changes if $metadata is NULL.
......
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment