Update app.py

app.py

@@ -1,6 +1,6 @@
 from flask import Flask, request, jsonify, redirect, Response, abort, send_from_directory
 from flask import make_response, stream_with_context
-
+import time
 import os
 import requests
 import subprocess
@@ -10,6 +10,8 @@ import tempfile
 import json
 import io
 import traceback
+import struct
+
 import contextlib
 
 app = Flask(__name__)