use mmap in fdxsql tool to mathc how files are handled by flask upload

flaskfdx/tools/fdxsql.py

@@ -8,6 +8,7 @@ report type, ie dsw, INFILE is an excel file, DATABASE is an sqlite file
 """
 
 import sys
+import mmap
 import xlrd
 import argparse
 import sqlite3
@@ -109,7 +110,7 @@ def getDate(srcSheet):
 
 def processDsw(file, database):
     # open the excel sheet for reading
-    srcBook = xlrd.open_workbook(file)
+    srcBook = xlrd.open_workbook(file_contents=file.read())
     srcSheet = srcBook.sheet_by_index(0)
 
     reportDate = getDate(srcSheet)
@@ -129,13 +130,17 @@ def main():
     parser.add_argument("database")
     args = parser.parse_args()
 
+    # open the file and create mmap object
+    file = open(args.inFile, 'r')
+    mmapfile = mmap.mmap(file.fileno(), length=0, access=mmap.ACCESS_READ)
+
     #open the database
     conn = openDatabase(args.database)
     if conn == None:
         sys.exit('database could not be opened, does it exist')
 
     if args.type == 'dsw':
-        date, error = processDsw(args.inFile, conn)
+        date, error = processDsw(mmapfile, conn)
         if not error:
             print(date)
         else:

flaskfdx/upload.py

@@ -5,6 +5,7 @@ from flaskfdx.tools import fdxsql
 
 def validate_xls_file(file):
     if inspect_format(None, file.read()) == 'xls':
+        file.stream.seek(0)
         return True
     else:
         return False