From 1b33e7066e74afd7708ed2071e0769869434cece Mon Sep 17 00:00:00 2001
From: George Cheng <Gerhut@GMail.com>
Date: Fri, 29 Jun 2018 18:34:51 +0800
Subject: [PATCH] Fixing overwrite Blob/File type as Content-Type in browser.

---
 lib/adapters/xhr.js | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/adapters/xhr.js b/lib/adapters/xhr.js
index 8c98d114b6..7c6dac21a6 100644
--- a/lib/adapters/xhr.js
+++ b/lib/adapters/xhr.js
@@ -16,6 +16,13 @@ module.exports = function xhrAdapter(config) {
       delete requestHeaders['Content-Type']; // Let the browser set it
     }
 
+    if (
+      (utils.isBlob(requestData) || utils.isFile(requestData)) &&
+      requestData.type
+    ) {
+      delete requestHeaders['Content-Type']; // Let the browser set it
+    }
+
     var request = new XMLHttpRequest();
 
     // HTTP basic authentication