fix abusing exceptions to check if row exists in db

app/redirectShortenURL.py

@@ -21,11 +21,11 @@ def redirect_shorten_url(request, short_url):
             abort(500)
         if not error_404: #If there was no 404 error before, redirect the user. If not throw a 404 error
             res = cursor.execute('SELECT CALLS FROM ANALYTICS WHERE SHORT_URL=?', [host + "/" + short_url.lower()])
-            try:
-                calls = res.fetchone()[0] + 1
+            row = row = cursor.fetchone()
+            if not row is None:
+                calls = row[0] + 1
                 cursor.execute('UPDATE ANALYTICS SET CALLS = ? WHERE SHORT_URL=?', (str(calls), host + "/" + short_url.lower()))
-            except:
-                print(Exception)
+            else:
                 cursor.execute('INSERT INTO ANALYTICS (SHORT_URL) VALUES ("' + host + "/" + short_url.lower() + "\")")
 
             return redirect(url) #I use temp redirect here, because the owner of a link can delete it. If then the link is reused, the user will maybe redirected to the wrong page