From 1798e2918679ff55f1039c9a3d8150e5e52440ab Mon Sep 17 00:00:00 2001
From: Joshua Ramon Enslin <joshua@museum-digital.de>
Date: Tue, 8 Jul 2025 17:38:34 +0200
Subject: [PATCH] Validate JSON returned from Wikidata's sparql endpoint, throw
 an exception if it is invalid

---
 src/NodaWikidataFetcher.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/NodaWikidataFetcher.php b/src/NodaWikidataFetcher.php
index 3e03d71..b1f493e 100644
--- a/src/NodaWikidataFetcher.php
+++ b/src/NodaWikidataFetcher.php
@@ -436,6 +436,10 @@ final class NodaWikidataFetcher {
         $url = 'https://query.wikidata.org/sparql?query=' . urlencode($sparqlQuery);
         $result = MD_STD::runCurl($url, 100000000, self::WIKIDATA_FETCH_HEADERS);
 
+        if (json_validate($result) === false) {
+            throw new MDhttpFailedException("Failed to run SPARQL query");
+        }
+
         return json_decode($result, true);
 
     }