use minio to store uploaded files; build dialog server; (#16)

* format code

* use minio to store uploaded files; build dialog server;

python/parser/excel_parser.py

@@ -1,10 +1,12 @@
 from openpyxl import load_workbook
 import sys
+from io import BytesIO
 
 
 class HuExcelParser:
     def __call__(self, fnm):
-        wb = load_workbook(fnm)
+        if isinstance(fnm, str):wb = load_workbook(fnm)
+        else: wb = load_workbook(BytesIO(fnm))
         res = []
         for sheetname in wb.sheetnames:
             ws = wb[sheetname]