Remove DECRYPT_FUNCTION and shrink player function

src/invidious.cr

@@ -170,10 +170,6 @@ Invidious::Database.check_integrity(CONFIG)
   {% puts "\nDone checking player dependencies, now compiling Invidious...\n" %}
 {% end %}
 
-# Misc
-
-DECRYPT_FUNCTION = nil
-
 # Start jobs
 
 if CONFIG.channel_threads > 0

src/invidious/videos.cr

@@ -326,6 +326,10 @@ end
 def fetch_video(id, region)
   info = extract_video_info(video_id: id)
 
+  if info.nil?
+    raise InfoException.new("Invidious companion is not available. Video playback cannot continue.")
+  end
+
   if reason = info["reason"]?
     if reason == "Video unavailable"
       raise NotFoundException.new(reason.as_s || "")

src/invidious/videos/parser.cr

@@ -53,11 +53,12 @@ def parse_related_video(related : JSON::Any) : Hash(String, JSON::Any)?
 end
 
 def extract_video_info(video_id : String)
-  # Init client config for the API
-  client_config = YoutubeAPI::ClientConfig.new
-
   # Fetch data from the player endpoint
-  player_response = YoutubeAPI.player(video_id: video_id, params: "2AMB", client_config: client_config)
+  player_response = YoutubeAPI.player(video_id: video_id)
+
+  if player_response.nil?
+    return nil
+  end
 
   playability_status = player_response.dig?("playabilityStatus", "status").try &.as_s
 
@@ -105,37 +106,6 @@ def extract_video_info(video_id : String)
   params = parse_video_info(video_id, player_response)
   params["reason"] = JSON::Any.new(reason) if reason
 
-  if !CONFIG.invidious_companion.present?
-    if player_response.dig?("streamingData", "adaptiveFormats", 0, "url").nil?
-      LOGGER.warn("Missing URLs for adaptive formats, falling back to other YT clients.")
-      players_fallback = {YoutubeAPI::ClientType::TvSimply, YoutubeAPI::ClientType::WebMobile}
-
-      players_fallback.each do |player_fallback|
-        client_config.client_type = player_fallback
-
-        next if !(player_fallback_response = try_fetch_streaming_data(video_id, client_config))
-
-        adaptive_formats = player_fallback_response.dig?("streamingData", "adaptiveFormats")
-        if adaptive_formats && (adaptive_formats.dig?(0, "url") || adaptive_formats.dig?(0, "signatureCipher"))
-          streaming_data = player_response["streamingData"].as_h
-          streaming_data["adaptiveFormats"] = adaptive_formats
-          player_response["streamingData"] = JSON::Any.new(streaming_data)
-          break
-        end
-      rescue InfoException
-        next LOGGER.warn("Failed to fetch streams with #{player_fallback}")
-      end
-    end
-
-    # Seems like video page can still render even without playable streams.
-    # its better than nothing.
-    #
-    # # Were we able to find playable video streams?
-    # if player_response.dig?("streamingData", "adaptiveFormats", 0, "url").nil?
-    #   # No :(
-    # end
-  end
-
   {"captions", "playabilityStatus", "playerConfig", "storyboards"}.each do |f|
     params[f] = player_response[f] if player_response[f]?
   end
@@ -163,7 +133,7 @@ end
 
 def try_fetch_streaming_data(id : String, client_config : YoutubeAPI::ClientConfig) : Hash(String, JSON::Any)?
   LOGGER.debug("try_fetch_streaming_data: [#{id}] Using #{client_config.client_type} client.")
-  response = YoutubeAPI.player(video_id: id, params: "2AMB", client_config: client_config)
+  response = YoutubeAPI.player(video_id: id)
 
   playability_status = response["playabilityStatus"]["status"]
   LOGGER.debug("try_fetch_streaming_data: [#{id}] Got playabilityStatus == #{playability_status}.")
@@ -480,17 +450,11 @@ private def convert_url(fmt)
     params = url.query_params
 
     LOGGER.debug("convert_url: Decoding '#{cfr}'")
-
-    unsig = DECRYPT_FUNCTION.try &.decrypt_signature(cfr["s"])
-    params[sp] = unsig if unsig
   else
     url = URI.parse(fmt["url"].as_s)
     params = url.query_params
   end
 
-  n = DECRYPT_FUNCTION.try &.decrypt_nsig(params["n"])
-  params["n"] = n if n
-
   url.query_params = params
   LOGGER.trace("convert_url: new url is '#{url}'")
 

src/invidious/yt_backend/youtube_api.cr

@@ -199,10 +199,6 @@ module YoutubeAPI
   # conf_1 = ClientConfig.new(region: "NO")
   # YoutubeAPI::search("Kollektivet", params: "", client_config: conf_1)
   #
-  # # Use the Android client to request video streams URLs
-  # conf_2 = ClientConfig.new(client_type: ClientType::Android)
-  # YoutubeAPI::player(video_id: "dQw4w9WgXcQ", client_config: conf_2)
-  #
   #
   struct ClientConfig
     # Type of client to emulate.
@@ -451,58 +447,23 @@ module YoutubeAPI
   end
 
   ####################################################################
-  # player(video_id, params, client_config?)
+  # player(video_id)
   #
-  # Requests the youtubei/v1/player endpoint with the required headers
+  # Requests the youtubei/v1/player Invidious Companion endpoint with
-  # and POST data in order to get a JSON reply.
+  # the requested video ID.
   #
-  # The requested data is a video ID (`v=` parameter), with some
+  # The requested data is a video ID (`v=` parameter).
-  # additional parameters, formatted as a base64 string.
   #
-  # An optional ClientConfig parameter can be passed, too (see
+  def player(video_id : String)
-  # `struct ClientConfig` above for more details).
+    # JSON Request data, required by Invidious Companion
-  #
-  def player(
-    video_id : String,
-    *, # Force the following parameters to be passed by name
-    params : String,
-    client_config : ClientConfig | Nil = nil,
-  )
-    # Playback context, separate because it can be different between clients
-    playback_ctx = {
-      "html5Preference" => "HTML5_PREF_WANTS",
-      "referer"         => "https://www.youtube.com/watch?v=#{video_id}",
-    } of String => String | Int64
-
-    if {"WEB", "TVHTML5"}.any? { |s| client_config.name.starts_with? s }
-      if sts = DECRYPT_FUNCTION.try &.get_sts
-        playback_ctx["signatureTimestamp"] = sts.to_i64
-      end
-    end
-
-    # JSON Request data, required by the API
     data = {
-      "contentCheckOk" => true,
+      "videoId" => video_id,
-      "videoId"        => video_id,
-      "context"        => self.make_context(client_config, video_id),
-      "racyCheckOk"    => true,
-      "user"           => {
-        "lockedSafetyMode" => false,
-      },
-      "playbackContext" => {
-        "contentPlaybackContext" => playback_ctx,
-      },
     }
 
-    # Append the additional parameters if those were provided
-    if params != ""
-      data["params"] = params
-    end
-
     if CONFIG.invidious_companion.present?
       return self._post_invidious_companion("/youtubei/v1/player", data)
     else
-      return self._post_json("/youtubei/v1/player", data, client_config)
+      return nil
     end
   end