Add auto-retry on 429 when listing emojis for export

export.py

@@ -9,6 +9,7 @@ import asyncio
 import logging
 import lxml.html
 import os
+import time
 import re
 from collections import namedtuple
 
@@ -120,12 +121,17 @@ async def _determine_all_emoji_urls(session: aiohttp.ClientSession, base_url: st
             'count': 100
         }
 
-        response = await session.post(base_url + EMOJI_API, data=data)
+        while True:
+            response = await session.post(base_url + EMOJI_API, data=data)
 
-        logger.info(f"loaded {response.real_url} (page {page})")
+            logger.info(f"loaded {response.real_url} (page {page})")
+            if response.status == 200:
+                break
+            if response.status != 429:
+                raise Exception(f"Failed to load emoji from {response.request_info.real_url} (status {response.status})")
 
-        if response.status != 200:
-            raise Exception(f"Failed to load emoji from {response.request_info.real_url} (status {response.status})")
+            logger.warning('Too many requests! Retrying in 5 seconds')
+            time.sleep(5)
 
         json = await response.json()