avoid infinite loops in case of 403 errors

delojza.py

@@ -14,6 +14,7 @@ from datetime import datetime, timedelta
 from glob import glob
 from operator import itemgetter
 from random import random
+from time import sleep
 
 import acoustid
 import filetype
@@ -190,13 +191,16 @@ class DelojzaBot:
             }]
         filenames = []
         with youtube_dl.YoutubeDL(ytdl) as ytdl:
+            attempts = 0
             while True:
                 try:
                     ytdl.download(urls)
                     break
                 except DownloadError as exc:
-                    if '403' in str(exc):
+                    attempts += 1
+                    if '403' in str(exc) and attempts < 5:
                         self.logger.warning("Received a 403!")
+                        sleep(1.357)
                         if self.markov:
                             message.reply_text(self.markov.make_sentence)
                     else: