add provider cache

backend/stream_providers.py

@@ -3,7 +3,7 @@ import streamlink
 import requests
 import asyncio
 import html.parser
-import re
+import expiringdict
 
 streamlink_sessions = {}
 streamlink_default_session = streamlink.Streamlink()
@@ -76,6 +76,7 @@ class StreamData():
 
 class StreamProvider():
     def __init__(self, upstream, proxy, logger):
+        self.name = self.__class__.__name__
         self.upstream = upstream
         self.proxy = None
         self.logger = logger
@@ -166,38 +167,30 @@ class MetaRunner(StreamProvider):
             self.logger.info(e)
         return StreamData(None, data.get("og:image"), data.get("og:title"), data.get("og:description"), False)
 
-async def get_ytdl(upstream, proxy, logger):
+upstream_cache = expiringdict.ExpiringDict(max_len=128, max_age_seconds=30)
+
+async def get_from_runner(cache_key, runner, logger):
     result = None
+    cached = upstream_cache.get(cache_key)
+    if isinstance(cached, StreamData):
+        return cached
     try:
-        runner = YoutubeRunner(upstream, proxy, logger)
         result_temp = await runner.run()
     except Exception as e:
         logger.info(e)
     else:
+        upstream_cache[cache_key] = result_temp
         result = result_temp
     return result
 
 async def get_streamlink(upstream, proxy, logger):
-    result = None
-    try:
-        runner = StreamlinkRunner(upstream, proxy, logger)
-        result_temp = await runner.run()
-    except Exception as e:
-        logger.info(e)
-    else:
-        result = result_temp
-    return result
+    return await get_from_runner((0, upstream), StreamlinkRunner(upstream, proxy, logger), logger)
+
+async def get_ytdl(upstream, proxy, logger):
+    return await get_from_runner((1, upstream), YoutubeRunner(upstream, proxy, logger), logger)
 
 async def get_meta(upstream, proxy, logger):
-    result = None
-    try:
-        runner = MetaRunner(upstream, proxy, logger)
-        result_temp = await runner.run()
-    except Exception as e:
-        logger.info(e)
-    else:
-        result = result_temp
-    return result
+    return await get_from_runner((2, upstream), MetaRunner(upstream, proxy, logger), logger)
 
 async def get_any(upstream, proxy, logger):
     tasks = []