retry content type

stream.py

@@ -48,14 +48,18 @@ class ProxyElem():
     def __repr__(self):
         return str(self.proxy)
     async def content_type(self, url):
-        ctype = "binary/octet-stream"
-        try:
+        ctype = None
         async with self.session() as session:
+            for i in range(5):
+                try:
                     resp = await session.head(url)
-                ctype = resp.headers.get("Content-Type", "binary/octet-stream")
+                    ctype = resp.headers.get("Content-Type", None)
                 except Exception as e:
                     logger.info(e)
+                else:
+                    if isinstance(ctype, str):
                         return ctype
+        return "binary/octet-type"
     async def proxy_url(self, current, path):
         jdata = None
         data = {}
@@ -348,7 +352,6 @@ class MainHandler(tornado.web.RequestHandler):
         else:
             upstream_proxy = await handler.proxy.proxy_url(upstream, None)
             ctype = await handler.proxy.content_type(upstream_proxy)
-            logger.info(upstream_proxy)
             data = None
             if "mpegurl" in ctype.lower():
                 data = await rewrite(upstream, handler.proxy)