Returning simple text error message instead of HTML for requests where HTML won't be rendered for the user. Fixes T2401.

Summary: If the check is too much, let me know. I noticed you send over __ajax__=true, so I figured it was safest to evaluate existance and value.

Test Plan: Included unit test. Would have included a test where __ajax__ and __conduit__ are not set, but without mocking this gives an uncatchable Fatal Error. If you want me to include it, just direct me on the mocking strategy.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T2401

Differential Revision: https://secure.phabricator.com/D4719

src/applications/config/response/PhabricatorConfigResponse.php

@@ -10,6 +10,15 @@ final class PhabricatorConfigResponse extends AphrontHTMLResponse {
   }
 
   public function buildResponseString() {
+    // Check to make sure we aren't requesting this via ajax or conduit
+    if (isset($_REQUEST['__ajax__']) || isset($_REQUEST['__conduit__'])) {
+      // We don't want to flood the console with html, just return a simple
+      // message for now.
+      return pht(
+        "This install has a fatal setup error, access the internet web ".
+        "version to view details and resolve it.");
+    }
+
     $resources = $this->buildResources();
 
     $view = $this->view->render();