fix undefined variable, minor optimization

src/cli/document/crawl.php

@@ -301,6 +301,10 @@ foreach($index->search('')
             );
 
             // Crawl links
+            $base = new \Yggverse\Net\Address(
+                $document->get('url')
+            );
+
             $documents = [];
 
             foreach ($body->getLinks() as $line)
@@ -318,10 +322,6 @@ foreach($index->search('')
 
                     if ($address->isRelative())
                     {
-                        $base = new \Yggverse\Net\Address(
-                            $document->get('url')
-                        );
-
                         if ($absolute = $address->getAbsolute($base))
                         {
                             $url = $absolute;
@@ -335,7 +335,7 @@ foreach($index->search('')
                     }
 
                     // External host rules
-                    if (!$config->cli->document->crawl->url->external && parse_url($url, PHP_URL_HOST) != $host)
+                    if (!$config->cli->document->crawl->url->external && $address->getHost() != $base->getHost())
                     {
                         continue;
                     }