diff --git a/common/Define/Controller/Json.php b/common/Define/Controller/Json.php
new file mode 100644
index 0000000..76dd338
--- /dev/null
+++ b/common/Define/Controller/Json.php
@@ -0,0 +1,20 @@
+<?php
+namespace ProVM\Common\Define\Controller;
+
+use Psr\Http\Message\ResponseInterface as Response;
+
+trait Json {
+  public function withJSON(Response $request, $data, bool $format = true): Response {
+    if (!is_string($data)) {
+      $enc = 0;
+      if ($format) {
+        $enc = \JSON_PRETTY_PRINT | \JSON_UNESCAPED_UNICODE | \JSON_UNESCAPED_SLASHES;
+      }
+      $data = json_encode($data, $enc);
+    }
+    $request->getBody()->write($data);
+    return $request
+      ->withHeader('Content-Type', 'application/json')
+      ->withStatus(201);
+  }
+}
diff --git a/common/Define/Controller/Redirect.php b/common/Define/Controller/Redirect.php
new file mode 100644
index 0000000..5b796be
--- /dev/null
+++ b/common/Define/Controller/Redirect.php
@@ -0,0 +1,12 @@
+<?php
+namespace ProVM\Common\Define\Controller;
+
+use Psr\Http\Message\ResponseInterface as Response;
+
+trait Redirect {
+  public function withRedirect(Response $request, string $uri, int $status = 301): Response {
+    return $response
+      ->withHeader('Location', $uri)
+      ->withStatus($status);
+  }
+}