perform caching of jsonld schemas

2 files changed, 33 insertions, 0 deletions

diff --git a/Zotlabs/Lib/LDSignatures.php b/Zotlabs/Lib/LDSignatures.php
index fa2758044..77e2ef332 100644
--- a/Zotlabs/Lib/LDSignatures.php
+++ b/Zotlabs/Lib/LDSignatures.php
@@ -82,6 +82,8 @@ class LDSignatures {
 		if(! is_object($data))
 			return '';
 
+		jsonld_set_document_loader('jsonld_document_loader');
+
 		return jsonld_normalize($data,[ 'algorithm' => 'URDNA2015', 'format' => 'application/nquads' ]);
 	}
 
diff --git a/include/network.php b/include/network.php
index da1afc3ac..7e2dbf4cf 100644
--- a/include/network.php
+++ b/include/network.php
@@ -1943,4 +1943,35 @@ function getBestSupportedMimeType($mimeTypes = null, $acceptedTypes = false) {
     }
     // no mime-type found
     return null;
+}
+
+
+function jsonld_document_loader($url) {
+
+	// perform caching for jsonld normaliser
+
+	require_once('library/jsonld/jsonld.php');
+
+	$cachepath = 'store/[data]/ldcache';
+	if(! is_dir($cachepath))
+		os_mkdir($cachepath,STORAGE_DEFAULT_PERMISSIONS,true);
+
+	$filename = $cachepath . '/' . urlencode($url);
+	if(file_exists($filename) && filemtime($filename) > time() - (12 * 60 * 60)) {
+		return json_decode(file_get_contents($filename));
+	}
+
+	$r = jsonld_default_document_loader($url);
+	if($r) {
+		file_put_contents($filename,json_encode($r));
+		return $r;
+	}
+
+	logger('not found');
+	if(file_exists($filename)) {
+		return json_decode(file_get_contents($filename));
+	}
+
+	return [];
+
 }
\ No newline at end of file