In memory read-write stream

Author: Greg Bowler

src/Message.php

@@ -221,7 +221,7 @@ public function setHeaders(array $headers) {
 	 */
 	public function getBody() {
 		if(!$this->stream) {
-			$this->stream = new Stream("/tmp/greg");
+			$this->stream = new Stream("php://memory");
 		}
 		return $this->stream;
 	}

src/Stream.php

@@ -13,7 +13,7 @@ class Stream implements StreamInterface {
 	protected $isWritable;
 	protected $uri;
 
-	public function __construct(string $path, string $mode = "r") {
+	public function __construct(string $path, string $mode = "r+") {
 		$this->stream = fopen($path, $mode);
 		$streamInfo = stream_get_meta_data($this->stream);
 		$this->isSeekable = $streamInfo["seekable"];