fix

app.py

@@ -60,7 +60,7 @@ def generate_hash(id, form):
 
     for url in urls:
         if url.startswith("http://") or url.startswith("https://"):
-            resp = requests.get(url=url, header=config.REQUEST_HEADERS)
+            resp = requests.get(url=url, headers=config.REQUEST_HEADERS)
             if resp.status_code != 200:
                 raise HashException('Invalid response from %s (status code %s)' % (resp.url, resp.status_code))
             md5.update(resp.content)