Update pubsub to use client pool

src/invidious/helpers/jobs.cr

@@ -127,6 +127,8 @@ def subscribe_to_feeds(db, logger, key, config)
     end
     max_channel = Channel(Int32).new
 
+    client_pool = HTTPPool.new(PUBSUB_URL, capacity: max_threads, timeout: 0.05)
+
     spawn do
       max_threads = max_channel.receive
       active_threads = 0
@@ -147,12 +149,13 @@ def subscribe_to_feeds(db, logger, key, config)
 
             spawn do
               begin
-                response = subscribe_pubsub(ucid, key, config)
+                response = subscribe_pubsub(ucid, key, config, client_pool)
 
                 if response.status_code >= 400
                   logger.puts("#{ucid} : #{response.body}")
                 end
               rescue ex
+                logger.puts("#{ucid} : #{ex.message}")
               end
 
               active_channel.send(true)

src/invidious/helpers/utils.cr

@@ -1949,7 +1949,7 @@ def sha256(text)
   return digest.hexdigest
 end
 
-def subscribe_pubsub(topic, key, config)
+def subscribe_pubsub(topic, key, config, client_pool)
   case topic
   when .match(/^UC[A-Za-z0-9_-]{22}$/)
     topic = "channel_id=#{topic}"
@@ -1961,7 +1961,6 @@ def subscribe_pubsub(topic, key, config)
     # TODO
   end
 
-  client = make_client(PUBSUB_URL)
   time = Time.utc.to_unix.to_s
   nonce = Random::Secure.hex(4)
   signature = "#{time}:#{nonce}"
@@ -1977,7 +1976,7 @@ def subscribe_pubsub(topic, key, config)
     "hub.secret"        => key.to_s,
   }
 
-  return client.post("/subscribe", form: body)
+  return client_pool.client &.post("/subscribe", form: body)
 end
 
 def parse_range(range)