From b34532becc86d4d485e47d0be3f9b994808ffcc3 Mon Sep 17 00:00:00 2001
From: overtrue <anzhengchao@gmail.com>
Date: Fri, 15 Jan 2016 17:25:03 +0800
Subject: [PATCH] File MIMT bugfix. closes #252

---
 src/Wechat/Utils/File.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Wechat/Utils/File.php b/src/Wechat/Utils/File.php
index 959971e990..1a4f6b9365 100644
--- a/src/Wechat/Utils/File.php
+++ b/src/Wechat/Utils/File.php
@@ -91,7 +91,7 @@ public static function getStreamExt($content)
     {
         $finfo = new finfo(FILEINFO_MIME);
 
-        $mime = $finfo->buffer($content);
+        $mime = strstr($finfo->buffer($content), ';', true);
 
         return isset(self::$extensionMap[$mime]) ? self::$extensionMap[$mime] : '';
     }