增加文件上传兼容

app.html

@@ -161,6 +161,10 @@
             //   delete header['Content-Type'];
             //   form = data;
             // }
+            if (params.dataType == "form-data") {
+                delete header['Content-Type']
+                requestData = params.data
+            }
 
             let headers = new Headers(header);