src/Tweeper.php: check http response code and return error for error codes

Check http response code from curl and return error for codes greater
than 400.

In particular this covers the case of non-existing accounts on social
media sites as the failure will propagate to the main function which
will exit with a non-zero code.

diff --git a/src/Tweeper.php b/src/Tweeper.php
index 4a32f56..12004cf 100644 (file)
--- a/src/Tweeper.php
+++ b/src/Tweeper.php
@@ -111,6 +111,17 @@ class Tweeper {
       }
     } while (curl_errno($ch) == CURLE_OPERATION_TIMEDOUT && ++$attempt < Tweeper::$maxConnectionRetries);
 
+    $response_code = curl_getinfo($ch, CURLINFO_RESPONSE_CODE);
+    if (FALSE === $response_code) {
+      trigger_error(curl_error($ch), E_USER_WARNING);
+      return FALSE;
+    }
+
+    if ($response_code >= 400) {
+      trigger_error("HTTP reponse code $response_code", E_USER_WARNING);
+      return FALSE;
+    }
+
     return $ret;
   }
 
@@ -336,6 +347,9 @@ class Tweeper {
     $get_xml_host_method = 'getXml' . Tweeper::toUpperCamelCase($host, '.');
     if (method_exists($this, $get_xml_host_method)) {
       $xml_data = call_user_func_array([$this, $get_xml_host_method], [$html]);
+      if (NULL === $xml_data) {
+        return NULL;
+      }
       $xmlDoc->loadXML($xml_data);
     }
     else {