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diff --git a/vendor/zendframework/zend-diactoros/src/Response/SapiStreamEmitter.php b/vendor/zendframework/zend-diactoros/src/Response/SapiStreamEmitter.php
new file mode 100644
index 000000000..02095e50b
--- /dev/null
+++ b/vendor/zendframework/zend-diactoros/src/Response/SapiStreamEmitter.php
@@ -0,0 +1,135 @@
+<?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;
+use RuntimeException;
+use Zend\Diactoros\RelativeStream;
+
+class SapiStreamEmitter implements EmitterInterface
+{
+    use SapiEmitterTrait;
+
+    /**
+     * Emits a response for a PHP SAPI environment.
+     *
+     * Emits the status line and headers via the header() function, and the
+     * body content via the output buffer.
+     *
+     * @param ResponseInterface $response
+     * @param int $maxBufferLength Maximum output buffering size for each iteration
+     */
+    public function emit(ResponseInterface $response, $maxBufferLength = 8192)
+    {
+        if (headers_sent()) {
+            throw new RuntimeException('Unable to emit response; headers already sent');
+        }
+
+        $response = $this->injectContentLength($response);
+
+        $this->emitStatusLine($response);
+        $this->emitHeaders($response);
+        $this->flush();
+
+        $range = $this->parseContentRange($response->getHeaderLine('Content-Range'));
+
+        if (is_array($range) && $range[0] === 'bytes') {
+            $this->emitBodyRange($range, $response, $maxBufferLength);
+            return;
+        }
+
+        $this->emitBody($response, $maxBufferLength);
+    }
+
+    /**
+     * Emit the message body.
+     *
+     * @param ResponseInterface $response
+     * @param int $maxBufferLength
+     */
+    private function emitBody(ResponseInterface $response, $maxBufferLength)
+    {
+        $body = $response->getBody();
+
+        if ($body->isSeekable()) {
+            $body->rewind();
+        }
+
+        if (! $body->isReadable()) {
+            echo $body;
+            return;
+        }
+
+        while (! $body->eof()) {
+            echo $body->read($maxBufferLength);
+        }
+    }
+
+    /**
+     * Emit a range of the message body.
+     *
+     * @param array $range
+     * @param ResponseInterface $response
+     * @param int $maxBufferLength
+     */
+    private function emitBodyRange(array $range, ResponseInterface $response, $maxBufferLength)
+    {
+        list($unit, $first, $last, $length) = $range;
+
+        $body = $response->getBody();
+
+        $length = $last - $first + 1;
+
+        if ($body->isSeekable()) {
+            $body->seek($first);
+
+            $first = 0;
+        }
+
+        if (! $body->isReadable()) {
+            echo substr($body->getContents(), $first, $length);
+            return;
+        }
+
+        $remaining = $length;
+
+        while ($remaining >= $maxBufferLength && ! $body->eof()) {
+            $contents   = $body->read($maxBufferLength);
+            $remaining -= strlen($contents);
+
+            echo $contents;
+        }
+
+        if ($remaining > 0 && ! $body->eof()) {
+            echo $body->read($remaining);
+        }
+    }
+
+    /**
+     * Parse content-range header
+     * http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.16
+     *
+     * @param string $header
+     * @return false|array [unit, first, last, length]; returns false if no
+     *     content range or an invalid content range is provided
+     */
+    private function parseContentRange($header)
+    {
+        if (preg_match('/(?P<unit>[\w]+)\s+(?P<first>\d+)-(?P<last>\d+)\/(?P<length>\d+|\*)/', $header, $matches)) {
+            return [
+                $matches['unit'],
+                (int) $matches['first'],
+                (int) $matches['last'],
+                $matches['length'] === '*' ? '*' : (int) $matches['length'],
+            ];
+        }
+        return false;
+    }
+}