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diff --git a/vendor/zendframework/zend-diactoros/src/Response/SapiEmitterTrait.php b/vendor/zendframework/zend-diactoros/src/Response/SapiEmitterTrait.php
new file mode 100644
index 000000000..bbfecfce2
--- /dev/null
+++ b/vendor/zendframework/zend-diactoros/src/Response/SapiEmitterTrait.php
@@ -0,0 +1,109 @@
+<?php
+/**
+ * Zend Framework (http://framework.zend.com/)
+ *
+ * @see       http://github.com/zendframework/zend-diactoros for the canonical source repository
+ * @copyright Copyright (c) 2015-2016 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   https://github.com/zendframework/zend-diactoros/blob/master/LICENSE.md New BSD License
+ */
+
+namespace Zend\Diactoros\Response;
+
+use Psr\Http\Message\ResponseInterface;
+
+trait SapiEmitterTrait
+{
+    /**
+     * Inject the Content-Length header if is not already present.
+     *
+     * @param ResponseInterface $response
+     * @return ResponseInterface
+     */
+    private function injectContentLength(ResponseInterface $response)
+    {
+        if (! $response->hasHeader('Content-Length')) {
+            // PSR-7 indicates int OR null for the stream size; for null values,
+            // we will not auto-inject the Content-Length.
+            if (null !== $response->getBody()->getSize()) {
+                return $response->withHeader('Content-Length', (string) $response->getBody()->getSize());
+            }
+        }
+
+        return $response;
+    }
+
+    /**
+     * Emit the status line.
+     *
+     * Emits the status line using the protocol version and status code from
+     * the response; if a reason phrase is available, it, too, is emitted.
+     *
+     * @param ResponseInterface $response
+     */
+    private function emitStatusLine(ResponseInterface $response)
+    {
+        $reasonPhrase = $response->getReasonPhrase();
+        header(sprintf(
+            'HTTP/%s %d%s',
+            $response->getProtocolVersion(),
+            $response->getStatusCode(),
+            ($reasonPhrase ? ' ' . $reasonPhrase : '')
+        ));
+    }
+
+    /**
+     * Emit response headers.
+     *
+     * Loops through each header, emitting each; if the header value
+     * is an array with multiple values, ensures that each is sent
+     * in such a way as to create aggregate headers (instead of replace
+     * the previous).
+     *
+     * @param ResponseInterface $response
+     */
+    private function emitHeaders(ResponseInterface $response)
+    {
+        foreach ($response->getHeaders() as $header => $values) {
+            $name  = $this->filterHeader($header);
+            $first = true;
+            foreach ($values as $value) {
+                header(sprintf(
+                    '%s: %s',
+                    $name,
+                    $value
+                ), $first);
+                $first = false;
+            }
+        }
+    }
+
+    /**
+     * Loops through the output buffer, flushing each, before emitting
+     * the response.
+     *
+     * @param int|null $maxBufferLevel Flush up to this buffer level.
+     */
+    private function flush($maxBufferLevel = null)
+    {
+        if (null === $maxBufferLevel) {
+            $maxBufferLevel = ob_get_level();
+        }
+
+        while (ob_get_level() > $maxBufferLevel) {
+            ob_end_flush();
+        }
+    }
+
+    /**
+     * Filter a header name to wordcase
+     *
+     * @param string $header
+     * @return string
+     */
+    private function filterHeader($header)
+    {
+        $filtered = str_replace('-', ' ', $header);
+        $filtered = ucwords($filtered);
+        return str_replace(' ', '-', $filtered);
+    }
+}