Merge remote-tracking branch 'weierophinney/hotfix/http-client-streams'

Author: akrabat

src/Client.php

@@ -832,6 +832,14 @@ public function send(Request $request = null)
             }
 
             if ($this->config['outputstream']) {
+                $stream = $this->getStream();
+                if (!is_resource($stream) && is_string($stream)) {
+                    $stream = fopen($stream, 'r');
+                }
+                if (!is_resource($stream)) {
+                    $stream = $this->getUri()->toString();
+                    $stream = fopen($stream, 'r');
+                }
                 $streamMetaData = stream_get_meta_data($stream);
                 if ($streamMetaData['seekable']) {
                     rewind($stream);