如果没有返回Content-Type 默认

src/http/Response.php

@@ -29,7 +29,9 @@ class Response
         if(!empty($self->source)) {
             $contentType = $response->getHeader('Content-Type');
             if(empty($contentType)) {
-                throw new ApiException('反馈的消息未指明内容格式Content-Type');
+                //throw new ApiException('反馈的消息未指明内容格式Content-Type');
+                //如果没有默认为这个
+                $contentType[0] = 'application/json; charset=utf-8';
             }
             $bodyFormat = explode(';', $contentType[0]);
             switch ($bodyFormat[0]) {