266 lines
11 KiB
Java
266 lines
11 KiB
Java
package org.schabi.newpipe.extractor.services.youtube.extractors;
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import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.DISABLE_PRETTY_PRINT_PARAMETER;
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import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.YOUTUBEI_V1_URL;
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import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.addClientInfoHeaders;
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import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.extractCookieValue;
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import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.extractPlaylistTypeFromPlaylistId;
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import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getKey;
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import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getValidJsonResponseBody;
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import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.prepareDesktopJsonBuilder;
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import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
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import static org.schabi.newpipe.extractor.utils.Utils.getQueryValue;
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import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
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import static org.schabi.newpipe.extractor.utils.Utils.stringToURL;
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import com.grack.nanojson.JsonArray;
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import com.grack.nanojson.JsonBuilder;
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import com.grack.nanojson.JsonObject;
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import com.grack.nanojson.JsonWriter;
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import org.schabi.newpipe.extractor.ListExtractor;
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import org.schabi.newpipe.extractor.Page;
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import org.schabi.newpipe.extractor.StreamingService;
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import org.schabi.newpipe.extractor.downloader.Downloader;
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import org.schabi.newpipe.extractor.downloader.Response;
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import org.schabi.newpipe.extractor.exceptions.ExtractionException;
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import org.schabi.newpipe.extractor.exceptions.ParsingException;
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import org.schabi.newpipe.extractor.linkhandler.ListLinkHandler;
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import org.schabi.newpipe.extractor.localization.Localization;
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import org.schabi.newpipe.extractor.localization.TimeAgoParser;
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import org.schabi.newpipe.extractor.playlist.PlaylistExtractor;
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import org.schabi.newpipe.extractor.playlist.PlaylistInfo;
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import org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper;
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import org.schabi.newpipe.extractor.stream.StreamInfoItem;
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import org.schabi.newpipe.extractor.stream.StreamInfoItemsCollector;
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import org.schabi.newpipe.extractor.utils.JsonUtils;
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import java.io.IOException;
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import java.net.URL;
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import java.nio.charset.StandardCharsets;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.Objects;
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import javax.annotation.Nonnull;
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import javax.annotation.Nullable;
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/**
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* A {@link YoutubePlaylistExtractor} for a mix (auto-generated playlist).
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* It handles URLs in the format of
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* {@code youtube.com/watch?v=videoId&list=playlistId}
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*/
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public class YoutubeMixPlaylistExtractor extends PlaylistExtractor {
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/**
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* YouTube identifies mixes based on this cookie. With this information it can generate
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* continuations without duplicates.
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*/
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public static final String COOKIE_NAME = "VISITOR_INFO1_LIVE";
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private JsonObject initialData;
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private JsonObject playlistData;
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private String cookieValue;
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public YoutubeMixPlaylistExtractor(final StreamingService service,
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final ListLinkHandler linkHandler) {
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super(service, linkHandler);
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}
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@Override
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public void onFetchPage(@Nonnull final Downloader downloader)
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throws IOException, ExtractionException {
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final Localization localization = getExtractorLocalization();
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final URL url = stringToURL(getUrl());
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final String mixPlaylistId = getId();
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final String videoId = getQueryValue(url, "v");
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final String playlistIndexString = getQueryValue(url, "index");
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final JsonBuilder<JsonObject> jsonBody = prepareDesktopJsonBuilder(localization,
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getExtractorContentCountry()).value("playlistId", mixPlaylistId);
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if (videoId != null) {
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jsonBody.value("videoId", videoId);
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}
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if (playlistIndexString != null) {
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jsonBody.value("playlistIndex", Integer.parseInt(playlistIndexString));
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}
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final byte[] body = JsonWriter.string(jsonBody.done()).getBytes(StandardCharsets.UTF_8);
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final Map<String, List<String>> headers = new HashMap<>();
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addClientInfoHeaders(headers);
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final Response response = getDownloader().post(YOUTUBEI_V1_URL + "next?key=" + getKey()
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+ DISABLE_PRETTY_PRINT_PARAMETER, headers, body, localization);
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initialData = JsonUtils.toJsonObject(getValidJsonResponseBody(response));
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playlistData = initialData.getObject("contents").getObject("twoColumnWatchNextResults")
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.getObject("playlist").getObject("playlist");
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if (isNullOrEmpty(playlistData)) {
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throw new ExtractionException("Could not get playlistData");
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}
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cookieValue = extractCookieValue(COOKIE_NAME, response);
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}
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@Nonnull
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@Override
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public String getName() throws ParsingException {
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final String name = YoutubeParsingHelper.getTextAtKey(playlistData, "title");
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if (isNullOrEmpty(name)) {
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throw new ParsingException("Could not get playlist name");
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}
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return name;
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}
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@Nonnull
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@Override
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public String getThumbnailUrl() throws ParsingException {
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try {
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return getThumbnailUrlFromPlaylistId(playlistData.getString("playlistId"));
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} catch (final Exception e) {
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try {
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// Fallback to thumbnail of current video. Always the case for channel mix
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return getThumbnailUrlFromVideoId(initialData.getObject("currentVideoEndpoint")
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.getObject("watchEndpoint").getString("videoId"));
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} catch (final Exception ignored) {
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}
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throw new ParsingException("Could not get playlist thumbnail", e);
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}
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}
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@Override
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public String getUploaderUrl() {
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// YouTube mixes are auto-generated by YouTube
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return EMPTY_STRING;
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}
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@Override
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public String getUploaderName() {
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// YouTube mixes are auto-generated by YouTube
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return "YouTube";
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}
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@Override
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public String getUploaderAvatarUrl() {
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// YouTube mixes are auto-generated by YouTube
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return EMPTY_STRING;
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}
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@Override
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public boolean isUploaderVerified() throws ParsingException {
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return false;
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}
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@Override
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public long getStreamCount() {
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// Auto-generated playlists always start with 25 videos and are endless
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return ListExtractor.ITEM_COUNT_INFINITE;
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}
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@Nonnull
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@Override
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public InfoItemsPage<StreamInfoItem> getInitialPage()
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throws IOException, ExtractionException {
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final StreamInfoItemsCollector collector = new StreamInfoItemsCollector(getServiceId());
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collectStreamsFrom(collector, playlistData.getArray("contents"));
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final Map<String, String> cookies = new HashMap<>();
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cookies.put(COOKIE_NAME, cookieValue);
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return new InfoItemsPage<>(collector, getNextPageFrom(playlistData, cookies));
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}
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@Nonnull
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private Page getNextPageFrom(@Nonnull final JsonObject playlistJson,
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final Map<String, String> cookies)
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throws IOException, ExtractionException {
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final JsonObject lastStream = ((JsonObject) playlistJson.getArray("contents")
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.get(playlistJson.getArray("contents").size() - 1));
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if (lastStream == null || lastStream.getObject("playlistPanelVideoRenderer") == null) {
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throw new ExtractionException("Could not extract next page url");
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}
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final JsonObject watchEndpoint = lastStream.getObject("playlistPanelVideoRenderer")
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.getObject("navigationEndpoint").getObject("watchEndpoint");
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final String playlistId = watchEndpoint.getString("playlistId");
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final String videoId = watchEndpoint.getString("videoId");
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final int index = watchEndpoint.getInt("index");
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final String params = watchEndpoint.getString("params");
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final byte[] body = JsonWriter.string(prepareDesktopJsonBuilder(getExtractorLocalization(),
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getExtractorContentCountry())
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.value("videoId", videoId)
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.value("playlistId", playlistId)
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.value("playlistIndex", index)
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.value("params", params)
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.done())
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.getBytes(StandardCharsets.UTF_8);
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return new Page(YOUTUBEI_V1_URL + "next?key=" + getKey(), null, null, cookies, body);
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}
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@Override
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public InfoItemsPage<StreamInfoItem> getPage(final Page page) throws IOException,
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ExtractionException {
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if (page == null || isNullOrEmpty(page.getUrl())) {
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throw new IllegalArgumentException("Page doesn't contain an URL");
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}
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if (!page.getCookies().containsKey(COOKIE_NAME)) {
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throw new IllegalArgumentException("Cookie '" + COOKIE_NAME + "' is missing");
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}
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final StreamInfoItemsCollector collector = new StreamInfoItemsCollector(getServiceId());
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final Map<String, List<String>> headers = new HashMap<>();
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addClientInfoHeaders(headers);
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final Response response = getDownloader().post(page.getUrl(), headers, page.getBody(),
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getExtractorLocalization());
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final JsonObject ajaxJson = JsonUtils.toJsonObject(getValidJsonResponseBody(response));
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final JsonObject playlistJson = ajaxJson.getObject("contents")
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.getObject("twoColumnWatchNextResults").getObject("playlist").getObject("playlist");
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final JsonArray allStreams = playlistJson.getArray("contents");
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// Sublist because YouTube returns up to 24 previous streams in the mix
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// +1 because the stream of "currentIndex" was already extracted in previous request
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final List<Object> newStreams =
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allStreams.subList(playlistJson.getInt("currentIndex") + 1, allStreams.size());
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collectStreamsFrom(collector, newStreams);
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return new InfoItemsPage<>(collector, getNextPageFrom(playlistJson, page.getCookies()));
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}
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private void collectStreamsFrom(@Nonnull final StreamInfoItemsCollector collector,
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@Nullable final List<Object> streams) {
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if (streams == null) {
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return;
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}
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final TimeAgoParser timeAgoParser = getTimeAgoParser();
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streams.stream()
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.filter(JsonObject.class::isInstance)
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.map(JsonObject.class::cast)
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.map(stream -> stream.getObject("playlistPanelVideoRenderer"))
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.filter(Objects::nonNull)
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.map(streamInfo -> new YoutubeStreamInfoItemExtractor(streamInfo, timeAgoParser))
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.forEachOrdered(collector::commit);
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}
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@Nonnull
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private String getThumbnailUrlFromPlaylistId(@Nonnull final String playlistId)
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throws ParsingException {
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return getThumbnailUrlFromVideoId(YoutubeParsingHelper.extractVideoIdFromMixId(playlistId));
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}
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@Nonnull
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private String getThumbnailUrlFromVideoId(final String videoId) {
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return "https://i.ytimg.com/vi/" + videoId + "/hqdefault.jpg";
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}
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@Nonnull
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@Override
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public PlaylistInfo.PlaylistType getPlaylistType() throws ParsingException {
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return extractPlaylistTypeFromPlaylistId(playlistData.getString("playlistId"));
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}
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}
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