add curl dns resolver options #15

example/config.json

@@ -177,6 +177,18 @@
                         {
                             "max":10485760
                         }
+                    },
+                    "dns":
+                    {
+                        "cache":
+                        {
+                            "timeout":120,
+                            "global":false
+                        },
+                        "shuffle":false,
+                        "interface":null,
+                        "ip4address":null,
+                        "ip6address":null
                     }
                 },
                 "queue":

src/cli/document/crawl.php

@@ -189,6 +189,52 @@ foreach($index->search('')
         $document->get('url')
     );
 
+    // DNS options
+    curl_setopt(
+        $request,
+        CURLOPT_DNS_CACHE_TIMEOUT,
+        $config->cli->document->crawl->curl->dns->cache->timeout
+    );
+
+    curl_setopt(
+        $request,
+        CURLOPT_DNS_USE_GLOBAL_CACHE,
+        $config->cli->document->crawl->curl->dns->cache->global
+    );
+
+    curl_setopt(
+        $request,
+        CURLOPT_DNS_SHUFFLE_ADDRESSES,
+        $config->cli->document->crawl->curl->dns->shuffle
+    );
+
+    if ($config->cli->document->crawl->curl->dns->interface)
+    {
+        curl_setopt(
+            $request,
+            CURLOPT_DNS_INTERFACE,
+            $config->cli->document->crawl->curl->dns->interface
+        );
+    }
+
+    if ($config->cli->document->crawl->curl->dns->ip4address)
+    {
+        curl_setopt(
+            $request,
+            CURLOPT_DNS_LOCAL_IP4,
+            $config->cli->document->crawl->curl->dns->ip4address
+        );
+    }
+
+    if ($config->cli->document->crawl->curl->dns->ip6address)
+    {
+        curl_setopt(
+            $request,
+            CURLOPT_DNS_LOCAL_IP6,
+            $config->cli->document->crawl->curl->dns->ip6address
+        );
+    }
+
     // Drop URL with long response
     curl_setopt(
         $request,