212 lines
8.5 KiB
Java
212 lines
8.5 KiB
Java
package org.schabi.newpipe.extractor.services.youtube.extractors;
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import com.grack.nanojson.JsonArray;
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import com.grack.nanojson.JsonObject;
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import com.grack.nanojson.JsonParser;
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import org.schabi.newpipe.extractor.NewPipe;
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import org.schabi.newpipe.extractor.StreamingService;
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import org.schabi.newpipe.extractor.comments.CommentsExtractor;
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import org.schabi.newpipe.extractor.comments.CommentsInfoItem;
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import org.schabi.newpipe.extractor.comments.CommentsInfoItemExtractor;
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import org.schabi.newpipe.extractor.comments.CommentsInfoItemsCollector;
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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.exceptions.ReCaptchaException;
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import org.schabi.newpipe.extractor.linkhandler.ListLinkHandler;
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import org.schabi.newpipe.extractor.utils.JsonUtils;
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import org.schabi.newpipe.extractor.utils.Parser;
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import javax.annotation.Nonnull;
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import java.io.IOException;
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import java.io.UnsupportedEncodingException;
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import java.net.URLEncoder;
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import java.util.*;
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import java.util.regex.Pattern;
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import static java.util.Collections.singletonList;
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public class YoutubeCommentsExtractor extends CommentsExtractor {
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// using the mobile site for comments because it loads faster and uses get requests instead of post
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private static final String USER_AGENT = "Mozilla/5.0 (Android 8.1.0; Mobile; rv:62.0) Gecko/62.0 Firefox/62.0";
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private static final Pattern YT_CLIENT_NAME_PATTERN = Pattern.compile("INNERTUBE_CONTEXT_CLIENT_NAME\\\":(.*?)[,}]");
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private String ytClientVersion;
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private String ytClientName;
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private String title;
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private InfoItemsPage<CommentsInfoItem> initPage;
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public YoutubeCommentsExtractor(StreamingService service, ListLinkHandler uiHandler) {
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super(service, uiHandler);
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}
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@Override
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public InfoItemsPage<CommentsInfoItem> getInitialPage() throws IOException, ExtractionException {
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// initial page does not load any comments but is required to get comments token
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super.fetchPage();
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return initPage;
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}
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@Override
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public String getNextPageUrl() throws IOException, ExtractionException {
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// initial page does not load any comments but is required to get comments token
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super.fetchPage();
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return initPage.getNextPageUrl();
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}
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private String getNextPageUrl(JsonObject ajaxJson) throws IOException, ParsingException {
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JsonArray arr;
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try {
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arr = JsonUtils.getArray(ajaxJson, "response.continuationContents.commentSectionContinuation.continuations");
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} catch (Exception e) {
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return "";
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}
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if(arr.isEmpty()) {
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return "";
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}
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String continuation;
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try {
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continuation = JsonUtils.getString(arr.getObject(0), "nextContinuationData.continuation");
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} catch (Exception e) {
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return "";
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}
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return getNextPageUrl(continuation);
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}
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private String getNextPageUrl(String continuation) throws ParsingException {
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Map<String, String> params = new HashMap<>();
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params.put("action_get_comments", "1");
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params.put("pbj", "1");
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params.put("ctoken", continuation);
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try {
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return "https://m.youtube.com/watch_comment?" + getDataString(params);
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} catch (UnsupportedEncodingException e) {
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throw new ParsingException("Could not get next page url", e);
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}
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}
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@Override
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public InfoItemsPage<CommentsInfoItem> getPage(String pageUrl) throws IOException, ExtractionException {
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if (pageUrl == null || pageUrl.isEmpty()) {
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throw new ExtractionException(new IllegalArgumentException("Page url is empty or null"));
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}
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String ajaxResponse = makeAjaxRequest(pageUrl);
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JsonObject ajaxJson;
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try {
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ajaxJson = JsonParser.array().from(ajaxResponse).getObject(1);
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} catch (Exception e) {
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throw new ParsingException("Could not parse json data for comments", e);
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}
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CommentsInfoItemsCollector collector = new CommentsInfoItemsCollector(getServiceId());
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collectCommentsFrom(collector, ajaxJson);
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return new InfoItemsPage<>(collector, getNextPageUrl(ajaxJson));
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}
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private void collectCommentsFrom(CommentsInfoItemsCollector collector, JsonObject ajaxJson) throws ParsingException {
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JsonArray contents;
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try {
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contents = JsonUtils.getArray(ajaxJson, "response.continuationContents.commentSectionContinuation.items");
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}catch(Exception e) {
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//no comments
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return;
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}
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fetchTitle(contents);
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List<Object> comments;
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try {
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comments = JsonUtils.getValues(contents, "commentThreadRenderer.comment.commentRenderer");
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}catch(Exception e) {
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throw new ParsingException("unable to get parse youtube comments", e);
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}
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for(Object c: comments) {
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if(c instanceof JsonObject) {
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CommentsInfoItemExtractor extractor = new YoutubeCommentsInfoItemExtractor((JsonObject) c, getUrl(), getTimeAgoParser());
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collector.commit(extractor);
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}
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}
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}
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private void fetchTitle(JsonArray contents) {
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if(null == title) {
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try {
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title = getYoutubeText(JsonUtils.getObject(contents.getObject(0), "commentThreadRenderer.commentTargetTitle"));
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} catch (Exception e) {
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title = "Youtube Comments";
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}
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}
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}
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@Override
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public void onFetchPage(@Nonnull Downloader downloader) throws IOException, ExtractionException {
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final Map<String, List<String>> requestHeaders = new HashMap<>();
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requestHeaders.put("User-Agent", singletonList(USER_AGENT));
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final Response response = downloader.get(getUrl(), requestHeaders, getExtractorLocalization());
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String responseBody = response.responseBody();
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ytClientVersion = findValue(responseBody, "INNERTUBE_CONTEXT_CLIENT_VERSION\":\"", "\"");
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ytClientName = Parser.matchGroup1(YT_CLIENT_NAME_PATTERN, responseBody);
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String commentsTokenInside = findValue(responseBody, "commentSectionRenderer", "}");
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String commentsToken = findValue(commentsTokenInside, "continuation\":\"", "\"");
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initPage = getPage(getNextPageUrl(commentsToken));
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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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return title;
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}
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private String makeAjaxRequest(String siteUrl) throws IOException, ReCaptchaException {
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Map<String, List<String>> requestHeaders = new HashMap<>();
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requestHeaders.put("Accept", singletonList("*/*"));
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requestHeaders.put("User-Agent", singletonList(USER_AGENT));
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requestHeaders.put("X-YouTube-Client-Version", singletonList(ytClientVersion));
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requestHeaders.put("X-YouTube-Client-Name", singletonList(ytClientName));
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return getDownloader().get(siteUrl, requestHeaders, getExtractorLocalization()).responseBody();
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}
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private String getDataString(Map<String, String> params) throws UnsupportedEncodingException {
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StringBuilder result = new StringBuilder();
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boolean first = true;
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for (Map.Entry<String, String> entry : params.entrySet()) {
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if (first)
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first = false;
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else
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result.append("&");
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result.append(URLEncoder.encode(entry.getKey(), "UTF-8"));
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result.append("=");
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result.append(URLEncoder.encode(entry.getValue(), "UTF-8"));
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}
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return result.toString();
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}
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private String findValue(String doc, String start, String end) {
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int beginIndex = doc.indexOf(start) + start.length();
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int endIndex = doc.indexOf(end, beginIndex);
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return doc.substring(beginIndex, endIndex);
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}
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public static String getYoutubeText(@Nonnull JsonObject object) throws ParsingException {
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try {
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return JsonUtils.getString(object, "simpleText");
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} catch (Exception e1) {
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try {
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JsonArray arr = JsonUtils.getArray(object, "runs");
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String result = "";
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for(int i=0; i<arr.size();i++) {
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result = result + JsonUtils.getString(arr.getObject(i), "text");
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}
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return result;
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} catch (Exception e2) {
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return "";
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}
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}
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}
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}
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