Fix: Filter out empty IP addresses in dnsResolve method

This commit resolves an issue where empty IP addresses could be returned by the dnsResolve method due to CNAME recursion. The fix filters out empty IP addresses before returning the result, ensuring that only valid, non-empty IP addresses are used in the addDnsPinning method.

Signed-off-by: Robin Winkelewski <[email protected]>

lib/private/Http/Client/DnsPinMiddleware.php

@@ -101,7 +101,10 @@ private function dnsResolve(string $target, int $recursionCount) : array {
 			}
 		}
 
-		return $targetIps;
+		// Filter out empty IP addresses before returning the result
+		return array_filter($targetIps, function($ip) {
+			return !empty($ip);
+		});
 	}
 
 	public function addDnsPinning() {