tokens: use http instead of redis to get the tokens

It should be compatible with github.com/iv-org/youtube-trusted-session-generator

src/invidious.cr

@@ -213,8 +213,10 @@ if !CONFIG.external_videoplayback_proxy.empty?
   Invidious::Jobs.register Invidious::Jobs::CheckExternalProxy.new
 end
 
-if CONFIG.refresh_tokens
+if !CONFIG.tokens_server.empty?
   Invidious::Jobs.register Invidious::Jobs::RefreshTokens.new
+else
+  LOGGER.info("jobs: Disabling RefreshTokens job. Invidious will use the tokens that are on the configuration file")
 end
 
 Invidious::Jobs.start_all

src/invidious/config.cr

@@ -192,15 +192,14 @@ class Config
   # at the start of the URI
   property external_videoplayback_proxy : Array(NamedTuple(url: String, balance: Bool)) = [] of NamedTuple(url: String, balance: Bool)
 
-  # Job to refresh tokens from a Redis compatible DB
-  property refresh_tokens : Bool = true
-
   property pubsub_domain : String = ""
 
   property ignore_user_tokens : Bool = false
 
   property server_id_cookie_name : String = "INVIDIOUS_SERVER_ID"
 
+  property tokens_server : String = ""
+
   {% if flag?(:linux) %}
     property reload_config_automatically : Bool = true
   {% end %}

src/invidious/helpers/redis_tokens.cr

@@ -1,36 +0,0 @@
-module Tokens
-  extend self
-  @@po_token : String | Nil
-  @@visitor_data : String | Nil
-
-  def refresh_tokens
-    @@po_token = REDIS_DB.get("invidious:po_token")
-    @@visitor_data = REDIS_DB.get("invidious:visitor_data")
-    if !@@po_token.nil? && !@@visitor_data.nil?
-      set_tokens
-      LOGGER.debug("RefreshTokens: Successfully updated po_token and visitor_data")
-    else
-      LOGGER.warn("RefreshTokens: Tokens are empty!")
-    end
-    LOGGER.trace("RefreshTokens: Tokens are:")
-    LOGGER.trace("RefreshTokens: po_token: #{CONFIG.po_token}")
-    LOGGER.trace("RefreshTokens: visitor_data: #{CONFIG.visitor_data}")
-  end
-
-  def set_tokens
-    CONFIG.po_token = @@po_token
-    CONFIG.visitor_data = @@visitor_data
-  end
-
-  def get_tokens
-    return {@@po_token, @@visitor_data}
-  end
-
-  def get_po_token
-    return @@po_token
-  end
-
-  def get_visitor_data
-    return @@visitor_data
-  end
-end

src/invidious/helpers/session_tokens.cr

@@ -0,0 +1,35 @@
+module Tokens
+  extend self
+  @@po_token : String | Nil
+  @@visitor_data : String | Nil
+
+  def refresh_tokens
+    begin
+      response = HTTP::Client.get "#{CONFIG.tokens_server}/generate"
+      if !response.status_code == 200
+        LOGGER.error("RefreshTokens: Expected response to have status code 200 but got #{response.status_code} from #{CONFIG.tokens_server}")
+      end
+      json = JSON.parse(response.body)
+      @@po_token = json.try &.["potoken"].as_s || nil 
+      @@visitor_data = json.try &.["visitorData"].as_s || nil
+    rescue ex
+      LOGGER.error("RefreshTokens: Failed to fetch tokens from #{CONFIG.tokens_server}: #{ex.message}")
+      return
+    end
+
+    if !@@po_token.nil? && !@@visitor_data.nil?
+      set_tokens
+      LOGGER.debug("RefreshTokens: Successfully updated po_token and visitor_data")
+    else
+      LOGGER.warn("RefreshTokens: Tokens are empty!. Invidious will use the tokens that are on the configuration file")
+    end
+    LOGGER.trace("RefreshTokens: Tokens are:")
+    LOGGER.trace("RefreshTokens: po_token: #{CONFIG.po_token}")
+    LOGGER.trace("RefreshTokens: visitor_data: #{CONFIG.visitor_data}")
+  end
+
+  def set_tokens
+    CONFIG.po_token = @@po_token
+    CONFIG.visitor_data = @@visitor_data
+  end
+end

src/invidious/videos/parser.cr

@@ -54,11 +54,6 @@ def extract_video_info(video_id : String)
   # Init client config for the API
   client_config = YoutubeAPI::ClientConfig.new
 
-  redis_po_token, redis_visitor_data = Tokens.get_tokens
-
-  po_token = redis_po_token || CONFIG.po_token
-  visitor_data = redis_visitor_data || CONFIG.visitor_data
-
   # Fetch data from the player endpoint
   player_response = YoutubeAPI.player(video_id: video_id, params: "2AMB", client_config: client_config)
 
@@ -109,7 +104,7 @@ def extract_video_info(video_id : String)
 
   # Don't use Android test suite client if po_token is passed because po_token doesn't
   # work for Android test suite client.
-  if reason.nil? && po_token.nil?
+  if reason.nil? && CONFIG.po_token.nil?
     # Fetch the video streams using an Android client in order to get the
     # decrypted URLs and maybe fix throttling issues (#2194). See the
     # following issue for an explanation about decrypted URLs: