[YouTube] Workaround Shorts UI for playlists by using a continuation for initial items #1104
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…for initial items YouTube don't return currently a continuation, if applicable, for the Shorts UI in playlists, restricting access to the 100th first items. The reel items returned don't give also upload date, uploader info and precise view count. Using a continuation which requests the first page of the playlist allows currently to get access to continuations, if applicable, and also standard video elements instead of Shorts ones, making extraction of upload date, uploader info and precise view count again possible. This continuation is only requested and used when the data structure should be the one of the Shorts UI. A fallback to the standard response is made in the cases where fetching or parsing the continuation response fails, or when no stream items are extracted. This change required to: - add a protocol buffer definition file for which its structure is based on reverse engineering of playlists continuations sent by WEB InnerTube client, received from InnerTube responses; - add a dependency on Protobuf Java Lite; - generate Java classes from the definition file with the protoc version corresponding to the one of the Protobuf Java Lite dependency used (see https://protobuf.dev/support/version-support/ for more details); they are excluded from Checkstyle checks as they do not follow our style rules at all; - add a dependency on Apache Commons Codec, as Java's Base64 class desugaring for Android is not released yet.
…dItems As continuations are now again available for playlists with Shorts UI, more items' tests can be enabled.
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YouTube don't return currently a continuation, if applicable, for the Shorts UI in playlists, restricting access to the 100th first items. The reel items returned don't give also upload date, uploader info and precise view count.
Using a continuation which requests the first page of the playlist allows currently to get access to continuations, if applicable, and also standard video elements instead of Shorts ones, making extraction of upload date, uploader info and precise view count again possible.
This continuation is only requested and used when the data structure should be the one of the Shorts UI.
A fallback to the standard response is made in the cases where fetching or parsing the continuation response fails, or when no stream items are extracted.
This change required to:
WEBInnerTube client, received from InnerTube responses;protocversion corresponding to the one of the Protobuf Java Lite dependency used (see https://protobuf.dev/support/version-support/ for more details); they are excluded from Checkstyle checks as they do not follow our style rules at all;Base64class desugaring for Android is not released yet.As a result of this change,
testMoreRelatedItemsmethod ofYoutubePlaylistExtractorTest.ShortsUItest class has been enabled, as we now get continuations for shorts playlists with more than 100 items and mocks of this test class had to be updated.