Merge branch 'master' into invidious-support

README.md

@@ -19,6 +19,7 @@ The following sites are currently supported:
 
 - YouTube
 - SoundCloud
+- MediaCCC
 
 ## License
 

extractor/src/main/java/org/schabi/newpipe/extractor/DownloadRequest.java

@@ -0,0 +1,44 @@
+package org.schabi.newpipe.extractor;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
+public class DownloadRequest {
+    
+    private final String requestBody;
+    private final Map<String, List<String>> requestHeaders;
+    public static final DownloadRequest emptyRequest = new DownloadRequest(null, null);
+
+    public DownloadRequest(String requestBody, Map<String, List<String>> headers) {
+        super();
+        this.requestBody = requestBody;
+        if(null != headers) {
+            this.requestHeaders = headers;
+        }else {
+            this.requestHeaders = Collections.emptyMap();
+        }
+    }
+
+    public String getRequestBody() {
+        return requestBody;
+    }
+
+    public Map<String, List<String>> getRequestHeaders() {
+        return requestHeaders;
+    }
+
+    public void setRequestCookies(List<String> cookies){
+        requestHeaders.put("Cookie", cookies);
+    }
+    
+    public List<String> getRequestCookies(){
+        if(null == requestHeaders) return Collections.emptyList();
+        List<String> cookies = requestHeaders.get("Cookie");
+        if(null == cookies)
+            return Collections.emptyList();
+        else
+            return cookies;
+    }
+
+}

extractor/src/main/java/org/schabi/newpipe/extractor/DownloadResponse.java

@@ -0,0 +1,37 @@
+package org.schabi.newpipe.extractor;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
+import javax.annotation.Nonnull;
+
+public class DownloadResponse {
+    private final String responseBody;
+    private final Map<String, List<String>> responseHeaders;
+
+    public DownloadResponse(String responseBody, Map<String, List<String>> headers) {
+        super();
+        this.responseBody = responseBody;
+        this.responseHeaders = headers;
+    }
+
+    public String getResponseBody() {
+        return responseBody;
+    }
+
+    public Map<String, List<String>> getResponseHeaders() {
+        return responseHeaders;
+    }
+    
+    @Nonnull
+    public List<String> getResponseCookies(){
+        if(null == responseHeaders) return Collections.emptyList();
+        List<String> cookies = responseHeaders.get("Set-Cookie");
+        if(null == cookies)
+            return Collections.emptyList();
+        else
+            return cookies;
+    }
+
+}

extractor/src/main/java/org/schabi/newpipe/extractor/Downloader.java

@@ -1,11 +1,11 @@
 package org.schabi.newpipe.extractor;
 
-import org.schabi.newpipe.extractor.exceptions.ReCaptchaException;
-import org.schabi.newpipe.extractor.utils.Localization;
-
 import java.io.IOException;
 import java.util.Map;
 
+import org.schabi.newpipe.extractor.exceptions.ReCaptchaException;
+import org.schabi.newpipe.extractor.utils.Localization;
+
 /*
  * Created by Christian Schabesberger on 28.01.16.
  *
@@ -29,8 +29,8 @@ import java.util.Map;
 public interface Downloader {
 
     /**
-     * Download the text file at the supplied URL as in download(String),
+     * Download the text file at the supplied URL as in download(String), but set
-     * but set the HTTP header field "Accept-Language" to the supplied string.
+     * the HTTP header field "Accept-Language" to the supplied string.
      *
      * @param siteUrl  the URL of the text file to return the contents of
      * @param localization the language and country (usually a 2-character code for each)
@@ -40,8 +40,8 @@ public interface Downloader {
     String download(String siteUrl, Localization localization) throws IOException, ReCaptchaException;
 
     /**
-     * Download the text file at the supplied URL as in download(String),
+     * Download the text file at the supplied URL as in download(String), but set
-     * but set the HTTP header field "Accept-Language" to the supplied string.
+     * the HTTP header field "Accept-Language" to the supplied string.
      *
      * @param siteUrl          the URL of the text file to return the contents of
      * @param customProperties set request header properties
@@ -51,12 +51,20 @@ public interface Downloader {
     String download(String siteUrl, Map<String, String> customProperties) throws IOException, ReCaptchaException;
 
     /**
-     * Download (via HTTP) the text file located at the supplied URL, and return its contents.
+     * Download (via HTTP) the text file located at the supplied URL, and return its
-     * Primarily intended for downloading web pages.
+     * contents. Primarily intended for downloading web pages.
      *
      * @param siteUrl the URL of the text file to download
      * @return the contents of the specified text file
      * @throws IOException
      */
     String download(String siteUrl) throws IOException, ReCaptchaException;
+
+    DownloadResponse get(String siteUrl, DownloadRequest request)
+            throws IOException, ReCaptchaException;
+
+    DownloadResponse get(String siteUrl) throws IOException, ReCaptchaException;
+
+    DownloadResponse post(String siteUrl, DownloadRequest request)
+            throws IOException, ReCaptchaException;
 }

extractor/src/main/java/org/schabi/newpipe/extractor/Extractor.java

@@ -8,8 +8,9 @@ import org.schabi.newpipe.extractor.utils.Localization;
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 import java.io.IOException;
+import java.io.Serializable;
 
-public abstract class Extractor {
+public abstract class Extractor{ 
     /**
      * {@link StreamingService} currently related to this extractor.<br>
      * Useful for getting other things from a service (like the url handlers for cleaning/accepting/get id from urls).

extractor/src/main/java/org/schabi/newpipe/extractor/InfoItem.java

@@ -68,6 +68,7 @@ public abstract class InfoItem implements Serializable {
     public enum InfoType {
         STREAM,
         PLAYLIST,
-        CHANNEL
+        CHANNEL,
+        COMMENT
     }
 }

extractor/src/main/java/org/schabi/newpipe/extractor/StreamingService.java

@@ -1,19 +1,25 @@
 package org.schabi.newpipe.extractor;
 
-import org.schabi.newpipe.extractor.channel.ChannelExtractor;
-import org.schabi.newpipe.extractor.exceptions.ExtractionException;
-import org.schabi.newpipe.extractor.exceptions.ParsingException;
-import org.schabi.newpipe.extractor.kiosk.KioskList;
-import org.schabi.newpipe.extractor.playlist.PlaylistExtractor;
-import org.schabi.newpipe.extractor.search.SearchExtractor;
-import org.schabi.newpipe.extractor.linkhandler.*;
-import org.schabi.newpipe.extractor.stream.StreamExtractor;
-import org.schabi.newpipe.extractor.subscription.SubscriptionExtractor;
-import org.schabi.newpipe.extractor.utils.Localization;
-
 import java.util.Collections;
 import java.util.List;
 
+import org.schabi.newpipe.extractor.channel.ChannelExtractor;
+import org.schabi.newpipe.extractor.comments.CommentsExtractor;
+import org.schabi.newpipe.extractor.exceptions.ExtractionException;
+import org.schabi.newpipe.extractor.exceptions.ParsingException;
+import org.schabi.newpipe.extractor.kiosk.KioskList;
+import org.schabi.newpipe.extractor.linkhandler.LinkHandler;
+import org.schabi.newpipe.extractor.linkhandler.LinkHandlerFactory;
+import org.schabi.newpipe.extractor.linkhandler.ListLinkHandler;
+import org.schabi.newpipe.extractor.linkhandler.ListLinkHandlerFactory;
+import org.schabi.newpipe.extractor.linkhandler.SearchQueryHandler;
+import org.schabi.newpipe.extractor.linkhandler.SearchQueryHandlerFactory;
+import org.schabi.newpipe.extractor.playlist.PlaylistExtractor;
+import org.schabi.newpipe.extractor.search.SearchExtractor;
+import org.schabi.newpipe.extractor.stream.StreamExtractor;
+import org.schabi.newpipe.extractor.subscription.SubscriptionExtractor;
+import org.schabi.newpipe.extractor.utils.Localization;
+
 /*
  * Copyright (C) Christian Schabesberger 2018 <chris.schabesberger@mailbox.org>
  * StreamingService.java is part of NewPipe.
@@ -60,7 +66,7 @@ public abstract class StreamingService {
         }
 
         public enum MediaCapability {
-            AUDIO, VIDEO, LIVE
+            AUDIO, VIDEO, LIVE, COMMENTS
         }
     }
 
@@ -135,6 +141,7 @@ public abstract class StreamingService {
      * @return an instance of a SearchQueryHandlerFactory
      */
     public abstract SearchQueryHandlerFactory getSearchQHFactory();
+    public abstract ListLinkHandlerFactory getCommentsLHFactory();
 
 
     ////////////////////////////////////////////
@@ -198,6 +205,8 @@ public abstract class StreamingService {
      */
     public abstract StreamExtractor getStreamExtractor(LinkHandler linkHandler,
                                                        Localization localization) throws ExtractionException;
+    public abstract CommentsExtractor getCommentsExtractor(ListLinkHandler linkHandler,
+                                                           Localization localization) throws ExtractionException;
     ////////////////////////////////////////////
     // Extractor with default localization
     ////////////////////////////////////////////
@@ -213,7 +222,7 @@ public abstract class StreamingService {
     public ChannelExtractor getChannelExtractor(ListLinkHandler linkHandler) throws ExtractionException {
         return getChannelExtractor(linkHandler, NewPipe.getPreferredLocalization());
     }
-
+    
     public PlaylistExtractor getPlaylistExtractor(ListLinkHandler linkHandler) throws ExtractionException {
         return getPlaylistExtractor(linkHandler, NewPipe.getPreferredLocalization());
     }
@@ -221,6 +230,10 @@ public abstract class StreamingService {
     public StreamExtractor getStreamExtractor(LinkHandler linkHandler) throws ExtractionException {
         return getStreamExtractor(linkHandler, NewPipe.getPreferredLocalization());
     }
+    
+    public CommentsExtractor getCommentsExtractor(ListLinkHandler urlIdHandler) throws ExtractionException {
+        return getCommentsExtractor(urlIdHandler, NewPipe.getPreferredLocalization());
+    }
 
     ////////////////////////////////////////////
     // Extractor without link handler
@@ -274,6 +287,15 @@ public abstract class StreamingService {
     public StreamExtractor getStreamExtractor(String url) throws ExtractionException {
         return getStreamExtractor(getStreamLHFactory().fromUrl(url), NewPipe.getPreferredLocalization());
     }
+    
+    public CommentsExtractor getCommentsExtractor(String url) throws ExtractionException {
+        ListLinkHandlerFactory llhf = getCommentsLHFactory();
+        if(null == llhf) {
+            return null;
+        }
+        return getCommentsExtractor(llhf.fromUrl(url), NewPipe.getPreferredLocalization());
+    }
+
 
     /**
      * Figures out where the link is pointing to (a channel, a video, a playlist, etc.)

extractor/src/main/java/org/schabi/newpipe/extractor/comments/CommentsExtractor.java

@@ -0,0 +1,15 @@
+package org.schabi.newpipe.extractor.comments;
+
+import org.schabi.newpipe.extractor.ListExtractor;
+import org.schabi.newpipe.extractor.StreamingService;
+import org.schabi.newpipe.extractor.linkhandler.ListLinkHandler;
+import org.schabi.newpipe.extractor.utils.Localization;
+
+public abstract class CommentsExtractor extends ListExtractor<CommentsInfoItem> {
+
+	public CommentsExtractor(StreamingService service, ListLinkHandler uiHandler, Localization localization) {
+		super(service, uiHandler, localization);
+		// TODO Auto-generated constructor stub
+	}
+
+}

extractor/src/main/java/org/schabi/newpipe/extractor/comments/CommentsInfo.java

@@ -0,0 +1,72 @@
+package org.schabi.newpipe.extractor.comments;
+
+import java.io.IOException;
+
+import org.schabi.newpipe.extractor.ListExtractor.InfoItemsPage;
+import org.schabi.newpipe.extractor.ListInfo;
+import org.schabi.newpipe.extractor.NewPipe;
+import org.schabi.newpipe.extractor.StreamingService;
+import org.schabi.newpipe.extractor.exceptions.ExtractionException;
+import org.schabi.newpipe.extractor.linkhandler.ListLinkHandler;
+import org.schabi.newpipe.extractor.utils.ExtractorHelper;
+
+public class CommentsInfo extends ListInfo<CommentsInfoItem>{
+
+	private CommentsInfo(int serviceId, ListLinkHandler listUrlIdHandler, String name) {
+		super(serviceId, listUrlIdHandler, name);
+		// TODO Auto-generated constructor stub
+	}
+	
+	public static CommentsInfo getInfo(String url) throws IOException, ExtractionException {
+        return getInfo(NewPipe.getServiceByUrl(url), url);
+    }
+
+	public static CommentsInfo getInfo(StreamingService serviceByUrl, String url) throws ExtractionException, IOException {
+	    return getInfo(serviceByUrl.getCommentsExtractor(url));
+	}
+
+    private static CommentsInfo getInfo(CommentsExtractor commentsExtractor) throws IOException, ExtractionException {
+        // for services which do not have a comments extractor
+        if (null == commentsExtractor) {
+            return null;
+        }
+
+        commentsExtractor.fetchPage();
+        String name = commentsExtractor.getName();
+        int serviceId = commentsExtractor.getServiceId();
+        ListLinkHandler listUrlIdHandler = commentsExtractor.getLinkHandler();
+        CommentsInfo commentsInfo = new CommentsInfo(serviceId, listUrlIdHandler, name);
+        commentsInfo.setCommentsExtractor(commentsExtractor);
+        InfoItemsPage<CommentsInfoItem> initialCommentsPage = ExtractorHelper.getItemsPageOrLogError(commentsInfo,
+                commentsExtractor);
+        commentsInfo.setRelatedItems(initialCommentsPage.getItems());
+        commentsInfo.setNextPageUrl(initialCommentsPage.getNextPageUrl());
+
+        return commentsInfo;
+    }
+    
+    public static InfoItemsPage<CommentsInfoItem> getMoreItems(CommentsInfo commentsInfo, String pageUrl)
+            throws ExtractionException, IOException {
+        return getMoreItems(NewPipe.getService(commentsInfo.getServiceId()), commentsInfo, pageUrl);
+    }
+    
+    public static InfoItemsPage<CommentsInfoItem> getMoreItems(StreamingService service, CommentsInfo commentsInfo,
+            String pageUrl) throws IOException, ExtractionException {
+        if (null == commentsInfo.getCommentsExtractor()) {
+            commentsInfo.setCommentsExtractor(service.getCommentsExtractor(commentsInfo.getUrl()));
+            commentsInfo.getCommentsExtractor().fetchPage();
+        }
+        return commentsInfo.getCommentsExtractor().getPage(pageUrl);
+    }
+    
+    private transient CommentsExtractor commentsExtractor;
+
+    public CommentsExtractor getCommentsExtractor() {
+        return commentsExtractor;
+    }
+
+    public void setCommentsExtractor(CommentsExtractor commentsExtractor) {
+        this.commentsExtractor = commentsExtractor;
+    }
+
+}

extractor/src/main/java/org/schabi/newpipe/extractor/comments/CommentsInfoItem.java

@@ -0,0 +1,76 @@
+package org.schabi.newpipe.extractor.comments;
+
+import org.schabi.newpipe.extractor.InfoItem;
+
+public class CommentsInfoItem extends InfoItem{
+
+	private String commentId;
+	private String commentText;
+	private String authorName;
+	private String authorThumbnail;
+	private String authorEndpoint;
+	private String publishedTime;
+	private Integer likeCount;
+	
+	public CommentsInfoItem(int serviceId, String url, String name) {
+		super(InfoType.COMMENT, serviceId, url, name);
+		// TODO Auto-generated constructor stub
+	}
+	
+	public String getCommentText() {
+		return commentText;
+	}
+
+	public void setCommentText(String contentText) {
+		this.commentText = contentText;
+	}
+
+	public String getAuthorName() {
+		return authorName;
+	}
+
+	public void setAuthorName(String authorName) {
+		this.authorName = authorName;
+	}
+
+	public String getAuthorThumbnail() {
+		return authorThumbnail;
+	}
+
+	public void setAuthorThumbnail(String authorThumbnail) {
+		this.authorThumbnail = authorThumbnail;
+	}
+
+	public String getAuthorEndpoint() {
+		return authorEndpoint;
+	}
+
+	public void setAuthorEndpoint(String authorEndpoint) {
+		this.authorEndpoint = authorEndpoint;
+	}
+
+	public String getPublishedTime() {
+		return publishedTime;
+	}
+
+	public void setPublishedTime(String publishedTime) {
+		this.publishedTime = publishedTime;
+	}
+
+	public Integer getLikeCount() {
+		return likeCount;
+	}
+
+	public void setLikeCount(Integer likeCount) {
+		this.likeCount = likeCount;
+	}
+
+	public String getCommentId() {
+		return commentId;
+	}
+
+	public void setCommentId(String commentId) {
+		this.commentId = commentId;
+	}
+
+}

extractor/src/main/java/org/schabi/newpipe/extractor/comments/CommentsInfoItemExtractor.java

@@ -0,0 +1,14 @@
+package org.schabi.newpipe.extractor.comments;
+
+import org.schabi.newpipe.extractor.InfoItemExtractor;
+import org.schabi.newpipe.extractor.exceptions.ParsingException;
+
+public interface CommentsInfoItemExtractor extends InfoItemExtractor {
+    String getCommentId() throws ParsingException;
+    String getCommentText() throws ParsingException;
+    String getAuthorName() throws ParsingException;
+    String getAuthorThumbnail() throws ParsingException;
+    String getAuthorEndpoint() throws ParsingException;
+    String getPublishedTime() throws ParsingException;
+    Integer getLikeCount() throws ParsingException;
+}

extractor/src/main/java/org/schabi/newpipe/extractor/comments/CommentsInfoItemsCollector.java

@@ -0,0 +1,89 @@
+package org.schabi.newpipe.extractor.comments;
+
+import java.util.List;
+import java.util.Vector;
+
+import org.schabi.newpipe.extractor.InfoItem;
+import org.schabi.newpipe.extractor.InfoItemsCollector;
+import org.schabi.newpipe.extractor.exceptions.ParsingException;
+
+public class CommentsInfoItemsCollector extends InfoItemsCollector<CommentsInfoItem, CommentsInfoItemExtractor> {
+
+    public CommentsInfoItemsCollector(int serviceId) {
+        super(serviceId);
+    }
+
+    @Override
+    public CommentsInfoItem extract(CommentsInfoItemExtractor extractor) throws ParsingException {
+
+        // important information
+        int serviceId = getServiceId();
+        String url = extractor.getUrl();
+        String name = extractor.getName();
+
+        CommentsInfoItem resultItem = new CommentsInfoItem(serviceId, url, name);
+
+        // optional information
+        try {
+            resultItem.setCommentId(extractor.getCommentId());
+        } catch (Exception e) {
+            addError(e);
+        }
+        try {
+            resultItem.setCommentText(extractor.getCommentText());
+        } catch (Exception e) {
+            addError(e);
+        }
+        try {
+            resultItem.setAuthorName(extractor.getAuthorName());
+        } catch (Exception e) {
+            addError(e);
+        }
+        try {
+            resultItem.setAuthorThumbnail(extractor.getAuthorThumbnail());
+        } catch (Exception e) {
+            addError(e);
+        }
+        try {
+            resultItem.setAuthorEndpoint(extractor.getAuthorEndpoint());
+        } catch (Exception e) {
+            addError(e);
+        }
+        try {
+            resultItem.setPublishedTime(extractor.getPublishedTime());
+        } catch (Exception e) {
+            addError(e);
+        }
+        try {
+            resultItem.setLikeCount(extractor.getLikeCount());
+        } catch (Exception e) {
+            addError(e);
+        }
+        try {
+            resultItem.setThumbnailUrl(extractor.getThumbnailUrl());
+        } catch (Exception e) {
+            addError(e);
+        }
+
+        return resultItem;
+    }
+
+    @Override
+    public void commit(CommentsInfoItemExtractor extractor) {
+        try {
+            addItem(extract(extractor));
+        } catch (Exception e) {
+            addError(e);
+        }
+    }
+
+    public List<CommentsInfoItem> getCommentsInfoItemList() {
+        List<CommentsInfoItem> siiList = new Vector<>();
+        for (InfoItem ii : super.getItems()) {
+            if (ii instanceof CommentsInfoItem) {
+                siiList.add((CommentsInfoItem) ii);
+            }
+        }
+        return siiList;
+    }
+}

extractor/src/main/java/org/schabi/newpipe/extractor/services/media_ccc/MediaCCCService.java

@@ -1,12 +1,24 @@
 package org.schabi.newpipe.extractor.services.media_ccc;
 
+import static java.util.Arrays.asList;
+import static org.schabi.newpipe.extractor.StreamingService.ServiceInfo.MediaCapability.AUDIO;
+import static org.schabi.newpipe.extractor.StreamingService.ServiceInfo.MediaCapability.VIDEO;
+
+import java.io.IOException;
+
 import org.schabi.newpipe.extractor.StreamingService;
 import org.schabi.newpipe.extractor.SuggestionExtractor;
 import org.schabi.newpipe.extractor.channel.ChannelExtractor;
+import org.schabi.newpipe.extractor.comments.CommentsExtractor;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
 import org.schabi.newpipe.extractor.kiosk.KioskExtractor;
 import org.schabi.newpipe.extractor.kiosk.KioskList;
-import org.schabi.newpipe.extractor.linkhandler.*;
+import org.schabi.newpipe.extractor.linkhandler.LinkHandler;
+import org.schabi.newpipe.extractor.linkhandler.LinkHandlerFactory;
+import org.schabi.newpipe.extractor.linkhandler.ListLinkHandler;
+import org.schabi.newpipe.extractor.linkhandler.ListLinkHandlerFactory;
+import org.schabi.newpipe.extractor.linkhandler.SearchQueryHandler;
+import org.schabi.newpipe.extractor.linkhandler.SearchQueryHandlerFactory;
 import org.schabi.newpipe.extractor.playlist.PlaylistExtractor;
 import org.schabi.newpipe.extractor.search.SearchExtractor;
 import org.schabi.newpipe.extractor.services.media_ccc.extractors.MediaCCCConferenceExtractor;
@@ -21,11 +33,6 @@ import org.schabi.newpipe.extractor.stream.StreamExtractor;
 import org.schabi.newpipe.extractor.subscription.SubscriptionExtractor;
 import org.schabi.newpipe.extractor.utils.Localization;
 
-import java.io.IOException;
-
-import static java.util.Arrays.asList;
-import static org.schabi.newpipe.extractor.StreamingService.ServiceInfo.MediaCapability.*;
-
 public class MediaCCCService extends StreamingService {
     public MediaCCCService(int id) {
         super(id, "MediaCCC", asList(AUDIO, VIDEO));
@@ -104,4 +111,16 @@ public class MediaCCCService extends StreamingService {
     public SubscriptionExtractor getSubscriptionExtractor() {
         return null;
     }
+
+    @Override
+    public ListLinkHandlerFactory getCommentsLHFactory() {
+        return null;
+    }
+
+    @Override
+    public CommentsExtractor getCommentsExtractor(ListLinkHandler linkHandler, Localization localization)
+            throws ExtractionException {
+        return null;
+    }
+
 }

extractor/src/main/java/org/schabi/newpipe/extractor/services/soundcloud/SoundcloudService.java

@@ -1,20 +1,27 @@
 package org.schabi.newpipe.extractor.services.soundcloud;
 
-import org.schabi.newpipe.extractor.*;
+import static java.util.Collections.singletonList;
-import org.schabi.newpipe.extractor.linkhandler.*;
+import static org.schabi.newpipe.extractor.StreamingService.ServiceInfo.MediaCapability.AUDIO;
+
+import org.schabi.newpipe.extractor.StreamingService;
+import org.schabi.newpipe.extractor.SuggestionExtractor;
 import org.schabi.newpipe.extractor.channel.ChannelExtractor;
+import org.schabi.newpipe.extractor.comments.CommentsExtractor;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
 import org.schabi.newpipe.extractor.kiosk.KioskExtractor;
 import org.schabi.newpipe.extractor.kiosk.KioskList;
+import org.schabi.newpipe.extractor.linkhandler.LinkHandler;
+import org.schabi.newpipe.extractor.linkhandler.LinkHandlerFactory;
+import org.schabi.newpipe.extractor.linkhandler.ListLinkHandler;
+import org.schabi.newpipe.extractor.linkhandler.ListLinkHandlerFactory;
+import org.schabi.newpipe.extractor.linkhandler.SearchQueryHandler;
+import org.schabi.newpipe.extractor.linkhandler.SearchQueryHandlerFactory;
 import org.schabi.newpipe.extractor.playlist.PlaylistExtractor;
 import org.schabi.newpipe.extractor.search.SearchExtractor;
 import org.schabi.newpipe.extractor.stream.StreamExtractor;
 import org.schabi.newpipe.extractor.subscription.SubscriptionExtractor;
 import org.schabi.newpipe.extractor.utils.Localization;
 
-import static java.util.Collections.singletonList;
-import static org.schabi.newpipe.extractor.StreamingService.ServiceInfo.MediaCapability.AUDIO;
-
 public class SoundcloudService extends StreamingService {
 
     public SoundcloudService(int id) {
@@ -100,4 +107,16 @@ public class SoundcloudService extends StreamingService {
     public SubscriptionExtractor getSubscriptionExtractor() {
         return new SoundcloudSubscriptionExtractor(this);
     }
+
+	@Override
+	public ListLinkHandlerFactory getCommentsLHFactory() {
+		return null;
+	}
+
+	@Override
+    public CommentsExtractor getCommentsExtractor(ListLinkHandler linkHandler, Localization localization)
+            throws ExtractionException {
+        return null;
+    }
+	
 }

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/YoutubeService.java

@@ -1,23 +1,44 @@
 package org.schabi.newpipe.extractor.services.youtube;
 
-import org.schabi.newpipe.extractor.*;
+import static java.util.Arrays.asList;
-import org.schabi.newpipe.extractor.linkhandler.*;
+import static org.schabi.newpipe.extractor.StreamingService.ServiceInfo.MediaCapability.AUDIO;
+import static org.schabi.newpipe.extractor.StreamingService.ServiceInfo.MediaCapability.COMMENTS;
+import static org.schabi.newpipe.extractor.StreamingService.ServiceInfo.MediaCapability.LIVE;
+import static org.schabi.newpipe.extractor.StreamingService.ServiceInfo.MediaCapability.VIDEO;
+
+import org.schabi.newpipe.extractor.StreamingService;
+import org.schabi.newpipe.extractor.SuggestionExtractor;
 import org.schabi.newpipe.extractor.channel.ChannelExtractor;
+import org.schabi.newpipe.extractor.comments.CommentsExtractor;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
 import org.schabi.newpipe.extractor.kiosk.KioskExtractor;
 import org.schabi.newpipe.extractor.kiosk.KioskList;
+import org.schabi.newpipe.extractor.linkhandler.LinkHandler;
+import org.schabi.newpipe.extractor.linkhandler.LinkHandlerFactory;
+import org.schabi.newpipe.extractor.linkhandler.ListLinkHandler;
+import org.schabi.newpipe.extractor.linkhandler.ListLinkHandlerFactory;
+import org.schabi.newpipe.extractor.linkhandler.SearchQueryHandler;
+import org.schabi.newpipe.extractor.linkhandler.SearchQueryHandlerFactory;
 import org.schabi.newpipe.extractor.playlist.PlaylistExtractor;
 import org.schabi.newpipe.extractor.search.SearchExtractor;
-import org.schabi.newpipe.extractor.services.youtube.extractors.*;
+import org.schabi.newpipe.extractor.services.youtube.extractors.YoutubeChannelExtractor;
-import org.schabi.newpipe.extractor.services.youtube.linkHandler.*;
+import org.schabi.newpipe.extractor.services.youtube.extractors.YoutubeCommentsExtractor;
+import org.schabi.newpipe.extractor.services.youtube.extractors.YoutubePlaylistExtractor;
+import org.schabi.newpipe.extractor.services.youtube.extractors.YoutubeSearchExtractor;
+import org.schabi.newpipe.extractor.services.youtube.extractors.YoutubeStreamExtractor;
+import org.schabi.newpipe.extractor.services.youtube.extractors.YoutubeSubscriptionExtractor;
+import org.schabi.newpipe.extractor.services.youtube.extractors.YoutubeSuggestionExtractor;
+import org.schabi.newpipe.extractor.services.youtube.extractors.YoutubeTrendingExtractor;
+import org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeChannelLinkHandlerFactory;
+import org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeCommentsLinkHandlerFactory;
+import org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubePlaylistLinkHandlerFactory;
+import org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeSearchQueryHandlerFactory;
+import org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeStreamLinkHandlerFactory;
+import org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeTrendingLinkHandlerFactory;
 import org.schabi.newpipe.extractor.stream.StreamExtractor;
 import org.schabi.newpipe.extractor.subscription.SubscriptionExtractor;
 import org.schabi.newpipe.extractor.utils.Localization;
 
-import static java.util.Arrays.asList;
-import static org.schabi.newpipe.extractor.StreamingService.ServiceInfo.MediaCapability.*;
-
-
 /*
  * Created by Christian Schabesberger on 23.08.15.
  *
@@ -41,7 +62,7 @@ import static org.schabi.newpipe.extractor.StreamingService.ServiceInfo.MediaCap
 public class YoutubeService extends StreamingService {
 
     public YoutubeService(int id) {
-        super(id, "YouTube", asList(AUDIO, VIDEO, LIVE));
+        super(id, "YouTube", asList(AUDIO, VIDEO, LIVE, COMMENTS));
     }
 
     @Override
@@ -119,4 +140,15 @@ public class YoutubeService extends StreamingService {
         return new YoutubeSubscriptionExtractor(this);
     }
 
+    @Override
+    public ListLinkHandlerFactory getCommentsLHFactory() {
+        return YoutubeCommentsLinkHandlerFactory.getInstance();
+    }
+
+    @Override
+    public CommentsExtractor getCommentsExtractor(ListLinkHandler urlIdHandler, Localization localization)
+            throws ExtractionException {
+        return new YoutubeCommentsExtractor(this, urlIdHandler, localization);
+    }
+
 }

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeCommentsExtractor.java

@@ -0,0 +1,218 @@
+package org.schabi.newpipe.extractor.services.youtube.extractors;
+
+import java.io.IOException;
+import java.io.UnsupportedEncodingException;
+import java.net.URLEncoder;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.regex.Pattern;
+
+import javax.annotation.Nonnull;
+
+import org.schabi.newpipe.extractor.DownloadRequest;
+import org.schabi.newpipe.extractor.DownloadResponse;
+import org.schabi.newpipe.extractor.Downloader;
+import org.schabi.newpipe.extractor.NewPipe;
+import org.schabi.newpipe.extractor.StreamingService;
+import org.schabi.newpipe.extractor.comments.CommentsExtractor;
+import org.schabi.newpipe.extractor.comments.CommentsInfoItem;
+import org.schabi.newpipe.extractor.comments.CommentsInfoItemExtractor;
+import org.schabi.newpipe.extractor.comments.CommentsInfoItemsCollector;
+import org.schabi.newpipe.extractor.exceptions.ExtractionException;
+import org.schabi.newpipe.extractor.exceptions.ParsingException;
+import org.schabi.newpipe.extractor.exceptions.ReCaptchaException;
+import org.schabi.newpipe.extractor.linkhandler.ListLinkHandler;
+import org.schabi.newpipe.extractor.utils.JsonUtils;
+import org.schabi.newpipe.extractor.utils.Localization;
+import org.schabi.newpipe.extractor.utils.Parser;
+
+import com.grack.nanojson.JsonArray;
+import com.grack.nanojson.JsonObject;
+import com.grack.nanojson.JsonParser;
+
+
+public class YoutubeCommentsExtractor extends CommentsExtractor {
+
+    // using the mobile site for comments because it loads faster and uses get requests instead of post
+    private static final String USER_AGENT = "Mozilla/5.0 (Android 8.1.0; Mobile; rv:62.0) Gecko/62.0 Firefox/62.0";
+    private static final Pattern YT_CLIENT_NAME_PATTERN = Pattern.compile("INNERTUBE_CONTEXT_CLIENT_NAME\\\":(.*?)[,}]");
+
+    private String ytClientVersion;
+    private String ytClientName;
+    private String title;
+    private InfoItemsPage<CommentsInfoItem> initPage;
+
+    public YoutubeCommentsExtractor(StreamingService service, ListLinkHandler uiHandler, Localization localization) {
+        super(service, uiHandler, localization);
+    }
+
+    @Override
+    public InfoItemsPage<CommentsInfoItem> getInitialPage() throws IOException, ExtractionException {
+        // initial page does not load any comments but is required to get comments token
+        super.fetchPage();
+        return initPage;
+    }
+
+    @Override
+    public String getNextPageUrl() throws IOException, ExtractionException {
+        // initial page does not load any comments but is required to get comments token
+        super.fetchPage();
+        return initPage.getNextPageUrl();
+    }
+
+    private String getNextPageUrl(JsonObject ajaxJson) throws IOException, ParsingException {
+        
+        JsonArray arr;
+        try {
+            arr = JsonUtils.getArray(ajaxJson, "response.continuationContents.commentSectionContinuation.continuations");
+        } catch (Exception e) {
+            return "";
+        }
+        if(arr.isEmpty()) {
+            return "";
+        }
+        String continuation;
+        try {
+            continuation = JsonUtils.getString(arr.getObject(0), "nextContinuationData.continuation");
+        } catch (Exception e) {
+            return "";
+        }
+        return getNextPageUrl(continuation);
+    }
+
+    private String getNextPageUrl(String continuation) throws ParsingException {
+        Map<String, String> params = new HashMap<>();
+        params.put("action_get_comments", "1");
+        params.put("pbj", "1");
+        params.put("ctoken", continuation);
+        try {
+            return "https://m.youtube.com/watch_comment?" + getDataString(params);
+        } catch (UnsupportedEncodingException e) {
+            throw new ParsingException("Could not get next page url", e);
+        }
+    }
+
+    @Override
+    public InfoItemsPage<CommentsInfoItem> getPage(String pageUrl) throws IOException, ExtractionException {
+        if (pageUrl == null || pageUrl.isEmpty()) {
+            throw new ExtractionException(new IllegalArgumentException("Page url is empty or null"));
+        }
+        String ajaxResponse = makeAjaxRequest(pageUrl);
+        JsonObject ajaxJson;
+        try {
+            ajaxJson = JsonParser.array().from(ajaxResponse).getObject(1);
+        } catch (Exception e) {
+            throw new ParsingException("Could not parse json data for comments", e);
+        }
+        CommentsInfoItemsCollector collector = new CommentsInfoItemsCollector(getServiceId());
+        collectCommentsFrom(collector, ajaxJson, pageUrl);
+        return new InfoItemsPage<>(collector, getNextPageUrl(ajaxJson));
+    }
+
+    private void collectCommentsFrom(CommentsInfoItemsCollector collector, JsonObject ajaxJson, String pageUrl) throws ParsingException {
+        
+        JsonArray contents;
+        try {
+            contents = JsonUtils.getArray(ajaxJson, "response.continuationContents.commentSectionContinuation.items");
+        }catch(Exception e) {
+            //no comments
+            return;
+        }
+        fetchTitle(contents);
+        List<Object> comments;
+        try {
+            comments = JsonUtils.getValues(contents, "commentThreadRenderer.comment.commentRenderer");
+        }catch(Exception e) {
+            throw new ParsingException("unable to get parse youtube comments", e);
+        }
+        
+        for(Object c: comments) {
+            if(c instanceof JsonObject) {
+                CommentsInfoItemExtractor extractor = new YoutubeCommentsInfoItemExtractor((JsonObject) c, pageUrl);
+                collector.commit(extractor);
+            }
+        }
+    }
+
+    private void fetchTitle(JsonArray contents) {
+        if(null == title) {
+            try {
+                title = getYoutubeText(JsonUtils.getObject(contents.getObject(0), "commentThreadRenderer.commentTargetTitle"));
+            } catch (Exception e) {
+                title = "Youtube Comments";
+            }
+        }
+    }
+
+    @Override
+    public void onFetchPage(Downloader downloader) throws IOException, ExtractionException {
+        Map<String, List<String>> requestHeaders = new HashMap<>();
+        requestHeaders.put("User-Agent", Arrays.asList(USER_AGENT));
+        DownloadRequest request = new DownloadRequest(null, requestHeaders);
+        DownloadResponse response = downloader.get(getUrl(), request);
+        String responseBody = response.getResponseBody();
+        ytClientVersion = findValue(responseBody, "INNERTUBE_CONTEXT_CLIENT_VERSION\":\"", "\"");
+        ytClientName = Parser.matchGroup1(YT_CLIENT_NAME_PATTERN, responseBody);
+        String commentsTokenInside = findValue(responseBody, "commentSectionRenderer", "}");
+        String commentsToken = findValue(commentsTokenInside, "continuation\":\"", "\"");
+        initPage = getPage(getNextPageUrl(commentsToken));
+    }
+
+    @Override
+    public String getName() throws ParsingException {
+        return title;
+    }
+
+    private String makeAjaxRequest(String siteUrl) throws IOException, ReCaptchaException {
+
+        Map<String, List<String>> requestHeaders = new HashMap<>();
+        requestHeaders.put("Accept", Arrays.asList("*/*"));
+        requestHeaders.put("User-Agent", Arrays.asList(USER_AGENT));
+        requestHeaders.put("X-YouTube-Client-Version", Arrays.asList(ytClientVersion));
+        requestHeaders.put("X-YouTube-Client-Name", Arrays.asList(ytClientName));
+        DownloadRequest request = new DownloadRequest(null, requestHeaders);
+
+        return NewPipe.getDownloader().get(siteUrl, request).getResponseBody();
+    }
+
+    private String getDataString(Map<String, String> params) throws UnsupportedEncodingException {
+        StringBuilder result = new StringBuilder();
+        boolean first = true;
+        for (Map.Entry<String, String> entry : params.entrySet()) {
+            if (first)
+                first = false;
+            else
+                result.append("&");
+            result.append(URLEncoder.encode(entry.getKey(), "UTF-8"));
+            result.append("=");
+            result.append(URLEncoder.encode(entry.getValue(), "UTF-8"));
+        }
+        return result.toString();
+    }
+
+    private String findValue(String doc, String start, String end) {
+        int beginIndex = doc.indexOf(start) + start.length();
+        int endIndex = doc.indexOf(end, beginIndex);
+        return doc.substring(beginIndex, endIndex);
+    }
+    
+    public static String getYoutubeText(@Nonnull JsonObject object) throws ParsingException {
+        try {
+            return JsonUtils.getString(object, "simpleText");
+        } catch (Exception e1) {
+            try {
+                JsonArray arr = JsonUtils.getArray(object, "runs");
+                String result = "";
+                for(int i=0; i<arr.size();i++) {
+                    result = result + JsonUtils.getString(arr.getObject(i), "text");
+                }
+                return result;
+            } catch (Exception e2) {
+                return "";
+            }
+        }
+    }
+    
+}

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/extractors/YoutubeCommentsInfoItemExtractor.java

@@ -0,0 +1,108 @@
+package org.schabi.newpipe.extractor.services.youtube.extractors;
+
+import org.schabi.newpipe.extractor.comments.CommentsInfoItemExtractor;
+import org.schabi.newpipe.extractor.exceptions.ParsingException;
+import org.schabi.newpipe.extractor.utils.JsonUtils;
+
+import com.grack.nanojson.JsonArray;
+import com.grack.nanojson.JsonObject;
+
+public class YoutubeCommentsInfoItemExtractor implements CommentsInfoItemExtractor {
+
+    private final JsonObject json;
+    private final String url;
+
+    public YoutubeCommentsInfoItemExtractor(JsonObject json, String url) {
+        this.json = json;
+        this.url = url;
+    }
+
+    @Override
+    public String getUrl() throws ParsingException {
+        return url;
+    }
+
+    @Override
+    public String getThumbnailUrl() throws ParsingException {
+        try {
+            JsonArray arr = JsonUtils.getArray(json, "authorThumbnail.thumbnails");
+            return JsonUtils.getString(arr.getObject(2), "url");
+        } catch (Exception e) {
+            throw new ParsingException("Could not get thumbnail url", e);
+        }
+    }
+
+    @Override
+    public String getName() throws ParsingException {
+        try {
+            return YoutubeCommentsExtractor.getYoutubeText(JsonUtils.getObject(json, "authorText"));
+        } catch (Exception e) {
+            throw new ParsingException("Could not get author name", e);
+        }
+    }
+
+    @Override
+    public String getPublishedTime() throws ParsingException {
+        try {
+            return YoutubeCommentsExtractor.getYoutubeText(JsonUtils.getObject(json, "publishedTimeText"));
+        } catch (Exception e) {
+            throw new ParsingException("Could not get publishedTimeText", e);
+        }
+    }
+
+    @Override
+    public Integer getLikeCount() throws ParsingException {
+        try {
+            return JsonUtils.getNumber(json, "likeCount").intValue();
+        } catch (Exception e) {
+            throw new ParsingException("Could not get like count", e);
+        }
+    }
+
+    @Override
+    public String getCommentText() throws ParsingException {
+        try {
+            return YoutubeCommentsExtractor.getYoutubeText(JsonUtils.getObject(json, "contentText"));
+        } catch (Exception e) {
+            throw new ParsingException("Could not get comment text", e);
+        }
+    }
+
+    @Override
+    public String getCommentId() throws ParsingException {
+        try {
+            return JsonUtils.getString(json, "commentId");
+        } catch (Exception e) {
+            throw new ParsingException("Could not get comment id", e);
+        }
+    }
+
+    @Override
+    public String getAuthorThumbnail() throws ParsingException {
+        try {
+            JsonArray arr = JsonUtils.getArray(json, "authorThumbnail.thumbnails");
+            return JsonUtils.getString(arr.getObject(2), "url");
+        } catch (Exception e) {
+            throw new ParsingException("Could not get author thumbnail", e);
+        }
+    }
+
+    @Override
+    public String getAuthorName() throws ParsingException {
+        try {
+            return YoutubeCommentsExtractor.getYoutubeText(JsonUtils.getObject(json, "authorText"));
+        } catch (Exception e) {
+            throw new ParsingException("Could not get author name", e);
+        }
+    }
+
+    @Override
+    public String getAuthorEndpoint() throws ParsingException {
+        try {
+            return "https://youtube.com" + JsonUtils.getString(json, "authorEndpoint.browseEndpoint.canonicalBaseUrl");
+        } catch (Exception e) {
+            throw new ParsingException("Could not get author endpoint", e);
+        }
+    }
+
+}

extractor/src/main/java/org/schabi/newpipe/extractor/services/youtube/linkHandler/YoutubeCommentsLinkHandlerFactory.java

@@ -0,0 +1,107 @@
+package org.schabi.newpipe.extractor.services.youtube.linkHandler;
+
+import java.io.UnsupportedEncodingException;
+import java.net.URLDecoder;
+import java.util.List;
+
+import org.schabi.newpipe.extractor.exceptions.FoundAdException;
+import org.schabi.newpipe.extractor.exceptions.ParsingException;
+import org.schabi.newpipe.extractor.linkhandler.ListLinkHandlerFactory;
+import org.schabi.newpipe.extractor.utils.Parser;
+
+public class YoutubeCommentsLinkHandlerFactory extends ListLinkHandlerFactory {
+
+    private static final YoutubeCommentsLinkHandlerFactory instance = new YoutubeCommentsLinkHandlerFactory();
+    private static final String ID_PATTERN = "([\\-a-zA-Z0-9_]{11})";
+
+    public static YoutubeCommentsLinkHandlerFactory getInstance() {
+        return instance;
+    }
+
+    @Override
+    public String getUrl(String id) {
+        return "https://m.youtube.com/watch?v=" + id;
+    }
+
+    @Override
+    public String getId(String url) throws ParsingException, IllegalArgumentException {
+        if (url.isEmpty()) {
+            throw new IllegalArgumentException("The url parameter should not be empty");
+        }
+
+        String id;
+        String lowercaseUrl = url.toLowerCase();
+        if (lowercaseUrl.contains("youtube")) {
+            if (url.contains("attribution_link")) {
+                try {
+                    String escapedQuery = Parser.matchGroup1("u=(.[^&|$]*)", url);
+                    String query = URLDecoder.decode(escapedQuery, "UTF-8");
+                    id = Parser.matchGroup1("v=" + ID_PATTERN, query);
+                } catch (UnsupportedEncodingException uee) {
+                    throw new ParsingException("Could not parse attribution_link", uee);
+                }
+            } else if (url.contains("vnd.youtube")) {
+                id = Parser.matchGroup1(ID_PATTERN, url);
+            } else if (url.contains("embed")) {
+                id = Parser.matchGroup1("embed/" + ID_PATTERN, url);
+            } else if (url.contains("googleads")) {
+                throw new FoundAdException("Error found add: " + url);
+            } else {
+                id = Parser.matchGroup1("[?&]v=" + ID_PATTERN, url);
+            }
+        } else if (lowercaseUrl.contains("youtu.be")) {
+            if (url.contains("v=")) {
+                id = Parser.matchGroup1("v=" + ID_PATTERN, url);
+            } else {
+                id = Parser.matchGroup1("[Yy][Oo][Uu][Tt][Uu]\\.[Bb][Ee]/" + ID_PATTERN, url);
+            }
+        } else if(lowercaseUrl.contains("hooktube")) {
+            if(lowercaseUrl.contains("&v=")
+                    || lowercaseUrl.contains("?v=")) {
+                id = Parser.matchGroup1("[?&]v=" + ID_PATTERN, url);
+            } else if (url.contains("/embed/")) {
+                id = Parser.matchGroup1("embed/" + ID_PATTERN, url);
+            } else if (url.contains("/v/")) {
+                id = Parser.matchGroup1("v/" + ID_PATTERN, url);
+            } else if (url.contains("/watch/")) {
+                id = Parser.matchGroup1("watch/" + ID_PATTERN, url);
+            } else {
+                throw new ParsingException("Error no suitable url: " + url);
+            }
+        } else {
+            throw new ParsingException("Error no suitable url: " + url);
+        }
+
+
+        if (!id.isEmpty()) {
+            return id;
+        } else {
+            throw new ParsingException("Error could not parse url: " + url);
+        }
+    }
+
+    @Override
+    public boolean onAcceptUrl(final String url) throws FoundAdException {
+        final String lowercaseUrl = url.toLowerCase();
+        if (lowercaseUrl.contains("youtube")
+                || lowercaseUrl.contains("youtu.be")
+                || lowercaseUrl.contains("hooktube")) {
+            // bad programming I know
+            try {
+                getId(url);
+                return true;
+            } catch (FoundAdException fe) {
+                throw fe;
+            } catch (ParsingException e) {
+                return false;
+            }
+        } else {
+            return false;
+        }
+    }
+
+    @Override
+    public String getUrl(String id, List<String> contentFilter, String sortFilter) throws ParsingException {
+        return getUrl(id);
+    }
+}

extractor/src/main/java/org/schabi/newpipe/extractor/stream/StreamInfo.java

@@ -1,15 +1,18 @@
 package org.schabi.newpipe.extractor.stream;
 
-import org.schabi.newpipe.extractor.*;
-import org.schabi.newpipe.extractor.exceptions.ContentNotAvailableException;
-import org.schabi.newpipe.extractor.exceptions.ExtractionException;
-import org.schabi.newpipe.extractor.utils.DashMpdParser;
-import org.schabi.newpipe.extractor.utils.ExtractorHelper;
-
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 
+import org.schabi.newpipe.extractor.Info;
+import org.schabi.newpipe.extractor.InfoItem;
+import org.schabi.newpipe.extractor.NewPipe;
+import org.schabi.newpipe.extractor.StreamingService;
+import org.schabi.newpipe.extractor.exceptions.ContentNotAvailableException;
+import org.schabi.newpipe.extractor.exceptions.ExtractionException;
+import org.schabi.newpipe.extractor.utils.DashMpdParser;
+import org.schabi.newpipe.extractor.utils.ExtractorHelper;
+
 /*
  * Created by Christian Schabesberger on 26.08.15.
  *
@@ -41,7 +44,8 @@ public class StreamInfo extends Info {
         }
     }
 
-    public StreamInfo(int serviceId, String url, String originalUrl, StreamType streamType, String id, String name, int ageLimit) {
+    public StreamInfo(int serviceId, String url, String originalUrl, StreamType streamType, String id, String name,
+            int ageLimit) {
         super(serviceId, id, url, originalUrl, name);
         this.streamType = streamType;
         this.ageLimit = ageLimit;
@@ -63,9 +67,12 @@ public class StreamInfo extends Info {
             streamInfo = extractStreams(streamInfo, extractor);
             streamInfo = extractOptionalData(streamInfo, extractor);
         } catch (ExtractionException e) {
-            // Currently YouTube does not distinguish between age restricted videos and videos blocked
+            // Currently YouTube does not distinguish between age restricted videos and
-            // by country.  This means that during the initialisation of the extractor, the extractor
+            // videos blocked
-            // will assume that a video is age restricted while in reality it it blocked by country.
+            // by country. This means that during the initialisation of the extractor, the
+            // extractor
+            // will assume that a video is age restricted while in reality it it blocked by
+            // country.
             //
             // We will now detect whether the video is blocked by country or not.
             String errorMsg = extractor.getErrorMessage();
@@ -82,7 +89,8 @@ public class StreamInfo extends Info {
 
     private static StreamInfo extractImportantData(StreamExtractor extractor) throws ExtractionException {
         /* ---- important data, without the video can't be displayed goes here: ---- */
-        // if one of these is not available an exception is meant to be thrown directly into the frontend.
+        // if one of these is not available an exception is meant to be thrown directly
+        // into the frontend.
 
         int serviceId = extractor.getServiceId();
         String url = extractor.getUrl();
@@ -92,18 +100,16 @@ public class StreamInfo extends Info {
         String name = extractor.getName();
         int ageLimit = extractor.getAgeLimit();
 
-        if ((streamType == StreamType.NONE)
+        if ((streamType == StreamType.NONE) || (url == null || url.isEmpty()) || (id == null || id.isEmpty())
-                || (url == null || url.isEmpty())
+                || (name == null /* streamInfo.title can be empty of course */) || (ageLimit == -1)) {
-                || (id == null || id.isEmpty())
-                || (name == null /* streamInfo.title can be empty of course */)
-                || (ageLimit == -1)) {
             throw new ExtractionException("Some important stream information was not given.");
         }
 
         return new StreamInfo(serviceId, url, originalUrl, streamType, id, name, ageLimit);
     }
 
-    private static StreamInfo extractStreams(StreamInfo streamInfo, StreamExtractor extractor) throws ExtractionException {
+    private static StreamInfo extractStreams(StreamInfo streamInfo, StreamExtractor extractor)
+            throws ExtractionException {
         /* ---- stream extraction goes here ---- */
         // At least one type of stream has to be available,
         // otherwise an exception will be thrown directly into the frontend.
@@ -120,19 +126,19 @@ public class StreamInfo extends Info {
             streamInfo.addError(new ExtractionException("Couldn't get HLS manifest", e));
         }
 
-        /*  Load and extract audio */
+        /* Load and extract audio */
         try {
             streamInfo.setAudioStreams(extractor.getAudioStreams());
         } catch (Exception e) {
             streamInfo.addError(new ExtractionException("Couldn't get audio streams", e));
         }
-        /* Extract video stream url*/
+        /* Extract video stream url */
         try {
             streamInfo.setVideoStreams(extractor.getVideoStreams());
         } catch (Exception e) {
             streamInfo.addError(new ExtractionException("Couldn't get video streams", e));
         }
-        /* Extract video only stream url*/
+        /* Extract video only stream url */
         try {
             streamInfo.setVideoOnlyStreams(extractor.getVideoOnlyStreams());
         } catch (Exception e) {
@@ -140,9 +146,12 @@ public class StreamInfo extends Info {
         }
 
         // Lists can be null if a exception was thrown during extraction
-        if (streamInfo.getVideoStreams() == null) streamInfo.setVideoStreams(new ArrayList<VideoStream>());
+        if (streamInfo.getVideoStreams() == null)
-        if (streamInfo.getVideoOnlyStreams() == null) streamInfo.setVideoOnlyStreams(new ArrayList<VideoStream>());
+            streamInfo.setVideoStreams(new ArrayList<VideoStream>());
-        if (streamInfo.getAudioStreams() == null) streamInfo.setAudioStreams(new ArrayList<AudioStream>());
+        if (streamInfo.getVideoOnlyStreams() == null)
+            streamInfo.setVideoOnlyStreams(new ArrayList<VideoStream>());
+        if (streamInfo.getAudioStreams() == null)
+            streamInfo.setAudioStreams(new ArrayList<AudioStream>());
 
         Exception dashMpdError = null;
         if (streamInfo.getDashMpdUrl() != null && !streamInfo.getDashMpdUrl().isEmpty()) {
@@ -155,19 +164,23 @@ public class StreamInfo extends Info {
                 streamInfo.segmentedAudioStreams = result.getSegmentedAudioStreams();
                 streamInfo.segmentedVideoStreams = result.getSegmentedVideoStreams();
             } catch (Exception e) {
-                // Sometimes we receive 403 (forbidden) error when trying to download the manifest (similar to what happens with youtube-dl),
+                // Sometimes we receive 403 (forbidden) error when trying to download the
-                // just skip the exception (but store it somewhere), as we later check if we have streams anyway.
+                // manifest (similar to what happens with youtube-dl),
+                // just skip the exception (but store it somewhere), as we later check if we
+                // have streams anyway.
                 dashMpdError = e;
             }
         }
 
-        // Either audio or video has to be available, otherwise we didn't get a stream (since videoOnly are optional, they don't count).
+        // Either audio or video has to be available, otherwise we didn't get a stream
-        if ((streamInfo.videoStreams.isEmpty())
+        // (since videoOnly are optional, they don't count).
-                && (streamInfo.audioStreams.isEmpty())) {
+        if ((streamInfo.videoStreams.isEmpty()) && (streamInfo.audioStreams.isEmpty())) {
 
             if (dashMpdError != null) {
-                // If we don't have any video or audio and the dashMpd 'errored', add it to the error list
+                // If we don't have any video or audio and the dashMpd 'errored', add it to the
-                // (it's optional and it don't get added automatically, but it's good to have some additional error context)
+                // error list
+                // (it's optional and it don't get added automatically, but it's good to have
+                // some additional error context)
                 streamInfo.addError(dashMpdError);
             }
 
@@ -178,9 +191,11 @@ public class StreamInfo extends Info {
     }
 
     private static StreamInfo extractOptionalData(StreamInfo streamInfo, StreamExtractor extractor) {
-        /*  ---- optional data goes here: ---- */
+        /* ---- optional data goes here: ---- */
-        // If one of these fails, the frontend needs to handle that they are not available.
+        // If one of these fails, the frontend needs to handle that they are not
-        // Exceptions are therefore not thrown into the frontend, but stored into the error List,
+        // available.
+        // Exceptions are therefore not thrown into the frontend, but stored into the
+        // error List,
         // so the frontend can afterwards check where errors happened.
 
         try {
@@ -250,6 +265,7 @@ public class StreamInfo extends Info {
         }
 
         streamInfo.setRelatedStreams(ExtractorHelper.getRelatedVideosOrLogError(streamInfo, extractor));
+
         return streamInfo;
     }
 

extractor/src/main/java/org/schabi/newpipe/extractor/utils/ExtractorHelper.java

@@ -5,6 +5,7 @@ import org.schabi.newpipe.extractor.InfoItem;
 import org.schabi.newpipe.extractor.InfoItemsCollector;
 import org.schabi.newpipe.extractor.ListExtractor;
 import org.schabi.newpipe.extractor.ListExtractor.InfoItemsPage;
+import org.schabi.newpipe.extractor.comments.CommentsInfo;
 import org.schabi.newpipe.extractor.stream.StreamExtractor;
 import org.schabi.newpipe.extractor.stream.StreamInfo;
 
@@ -40,4 +41,5 @@ public class ExtractorHelper {
             return Collections.emptyList();
         }
     }
+    
 }

extractor/src/main/java/org/schabi/newpipe/extractor/utils/JsonUtils.java

@@ -0,0 +1,92 @@
+package org.schabi.newpipe.extractor.utils;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
+import org.schabi.newpipe.extractor.exceptions.ParsingException;
+
+import com.grack.nanojson.JsonArray;
+import com.grack.nanojson.JsonObject;
+
+public class JsonUtils {
+
+    private JsonUtils() {
+    }
+    
+    @Nonnull
+    public static Object getValue(@Nonnull JsonObject object, @Nonnull String path) throws ParsingException{
+
+        List<String> keys = Arrays.asList(path.split("\\."));
+        object = getObject(object, keys.subList(0, keys.size() - 1));
+        if (null == object) throw new ParsingException("Unable to get " + path);
+        Object result = object.get(keys.get(keys.size() - 1));
+        if(null == result) throw new ParsingException("Unable to get " + path);
+        return result;
+    }
+    
+    @Nonnull
+    public static String getString(@Nonnull JsonObject object, @Nonnull String path) throws ParsingException{
+        Object value = getValue(object, path);
+        if(value instanceof String) {
+            return (String) value;
+        }else {
+            throw new ParsingException("Unable to get " + path);
+        }
+    }
+    
+    @Nonnull
+    public static Number getNumber(@Nonnull JsonObject object, @Nonnull String path) throws ParsingException{
+        Object value = getValue(object, path);
+        if(value instanceof Number) {
+            return (Number) value;
+        }else {
+            throw new ParsingException("Unable to get " + path);
+        }
+    }
+    
+    @Nonnull
+    public static JsonObject getObject(@Nonnull JsonObject object, @Nonnull String path) throws ParsingException{
+        Object value = getValue(object, path);
+        if(value instanceof JsonObject) {
+            return (JsonObject) value;
+        }else {
+            throw new ParsingException("Unable to get " + path);
+        }
+    }
+    
+    @Nonnull
+    public static JsonArray getArray(@Nonnull JsonObject object, @Nonnull String path) throws ParsingException{
+        Object value = getValue(object, path);
+        if(value instanceof JsonArray) {
+            return (JsonArray) value;
+        }else {
+            throw new ParsingException("Unable to get " + path);
+        }
+    }
+
+    @Nonnull
+    public static List<Object> getValues(@Nonnull JsonArray array, @Nonnull String path) throws ParsingException {
+        
+        List<Object> result = new ArrayList<>();
+        for (int i = 0; i < array.size(); i++) {
+            JsonObject obj = array.getObject(i);
+            result.add(getValue(obj, path));
+        }
+        return result;
+    }
+
+    @Nullable
+    private static JsonObject getObject(@Nonnull JsonObject object, @Nonnull List<String> keys) {
+        JsonObject result = object;
+        for (String key : keys) {
+            result = result.getObject(key);
+            if (null == result) break;
+        }
+        return result;
+    }
+
+}

extractor/src/main/java/org/schabi/newpipe/extractor/utils/Parser.java

@@ -1,10 +1,5 @@
 package org.schabi.newpipe.extractor.utils;
 
-import org.nibor.autolink.LinkExtractor;
-import org.nibor.autolink.LinkSpan;
-import org.nibor.autolink.LinkType;
-import org.schabi.newpipe.extractor.exceptions.ParsingException;
-
 import java.io.UnsupportedEncodingException;
 import java.net.URLDecoder;
 import java.util.ArrayList;
@@ -14,6 +9,11 @@ import java.util.Map;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 
+import org.nibor.autolink.LinkExtractor;
+import org.nibor.autolink.LinkSpan;
+import org.nibor.autolink.LinkType;
+import org.schabi.newpipe.extractor.exceptions.ParsingException;
+
 /*
  * Created by Christian Schabesberger on 02.02.16.
  *
@@ -51,18 +51,26 @@ public class Parser {
     public static String matchGroup1(String pattern, String input) throws RegexException {
         return matchGroup(pattern, input, 1);
     }
+    
+    public static String matchGroup1(Pattern pattern, String input) throws RegexException {
+        return matchGroup(pattern, input, 1);
+    }
 
     public static String matchGroup(String pattern, String input, int group) throws RegexException {
         Pattern pat = Pattern.compile(pattern);
+        return matchGroup(pat, input, group);
+    }
+    
+    public static String matchGroup(Pattern pat, String input, int group) throws RegexException {
         Matcher mat = pat.matcher(input);
         boolean foundMatch = mat.find();
         if (foundMatch) {
             return mat.group(group);
         } else {
             if (input.length() > 1024) {
-                throw new RegexException("failed to find pattern \"" + pattern);
+                throw new RegexException("failed to find pattern \"" + pat.pattern());
             } else {
-                throw new RegexException("failed to find pattern \"" + pattern + " inside of " + input + "\"");
+                throw new RegexException("failed to find pattern \"" + pat.pattern() + " inside of " + input + "\"");
             }
         }
     }

extractor/src/test/java/org/schabi/newpipe/Downloader.java

@@ -1,17 +1,20 @@
 package org.schabi.newpipe;
 
-import org.schabi.newpipe.extractor.exceptions.ReCaptchaException;
-import org.schabi.newpipe.extractor.utils.Localization;
-
-import javax.net.ssl.HttpsURLConnection;
 import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.net.URL;
 import java.net.UnknownHostException;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 
+import javax.net.ssl.HttpsURLConnection;
+
+import org.schabi.newpipe.extractor.DownloadRequest;
+import org.schabi.newpipe.extractor.DownloadResponse;
+import org.schabi.newpipe.extractor.exceptions.ReCaptchaException;
+import org.schabi.newpipe.extractor.utils.Localization;
 
 /*
  * Created by Christian Schabesberger on 28.01.16.
@@ -63,10 +66,11 @@ public class Downloader implements org.schabi.newpipe.extractor.Downloader {
     }
 
     /**
-     * Download the text file at the supplied URL as in download(String),
+     * Download the text file at the supplied URL as in download(String), but set
-     * but set the HTTP header field "Accept-Language" to the supplied string.
+     * the HTTP header field "Accept-Language" to the supplied string.
      *
      * @param siteUrl  the URL of the text file to return the contents of
+
      * @param localization the language and country (usually a 2-character code for both values)
      * @return the contents of the specified text file
      */
@@ -76,57 +80,53 @@ public class Downloader implements org.schabi.newpipe.extractor.Downloader {
         return download(siteUrl, requestProperties);
     }
 
-
     /**
-     * Download the text file at the supplied URL as in download(String),
+     * Download the text file at the supplied URL as in download(String), but set
-     * but set the HTTP header field "Accept-Language" to the supplied string.
+     * the HTTP header field "Accept-Language" to the supplied string.
      *
      * @param siteUrl          the URL of the text file to return the contents of
      * @param customProperties set request header properties
      * @return the contents of the specified text file
      * @throws IOException
      */
-    public String download(String siteUrl, Map<String, String> customProperties) throws IOException, ReCaptchaException {
+    public String download(String siteUrl, Map<String, String> customProperties)
+            throws IOException, ReCaptchaException {
         URL url = new URL(siteUrl);
         HttpsURLConnection con = (HttpsURLConnection) url.openConnection();
-        for (Map.Entry<String, String> pair: customProperties.entrySet()) {
+        for (Map.Entry<String, String> pair : customProperties.entrySet()) {
             con.setRequestProperty(pair.getKey(), pair.getValue());
         }
         return dl(con);
     }
 
     /**
-     * Common functionality between download(String url) and download(String url, String language)
+     * Common functionality between download(String url) and download(String url,
+     * String language)
      */
     private static String dl(HttpsURLConnection con) throws IOException, ReCaptchaException {
         StringBuilder response = new StringBuilder();
         BufferedReader in = null;
 
         try {
-            con.setConnectTimeout(30 * 1000);// 30s
+
-            con.setReadTimeout(30 * 1000);// 30s
             con.setRequestMethod("GET");
-            con.setRequestProperty("User-Agent", USER_AGENT);
+            setDefaults(con);
 
-            if (getCookies().length() > 0) {
+            in = new BufferedReader(new InputStreamReader(con.getInputStream()));
-                con.setRequestProperty("Cookie", getCookies());
-            }
-
-            in = new BufferedReader(
-                    new InputStreamReader(con.getInputStream()));
             String inputLine;
 
             while ((inputLine = in.readLine()) != null) {
                 response.append(inputLine);
             }
-        } catch (UnknownHostException uhe) {//thrown when there's no internet connection
+        } catch (UnknownHostException uhe) {// thrown when there's no internet
+                                            // connection
             throw new IOException("unknown host or no network", uhe);
-            //Toast.makeText(getActivity(), uhe.getMessage(), Toast.LENGTH_LONG).show();
+            // Toast.makeText(getActivity(), uhe.getMessage(),
+            // Toast.LENGTH_LONG).show();
         } catch (Exception e) {
             /*
-             * HTTP 429 == Too Many Request
+             * HTTP 429 == Too Many Request Receive from Youtube.com = ReCaptcha challenge
-             * Receive from Youtube.com = ReCaptcha challenge request
+             * request See : https://github.com/rg3/youtube-dl/issues/5138
-             * See : https://github.com/rg3/youtube-dl/issues/5138
              */
             if (con.getResponseCode() == 429) {
                 throw new ReCaptchaException("reCaptcha Challenge requested");
@@ -142,9 +142,25 @@ public class Downloader implements org.schabi.newpipe.extractor.Downloader {
         return response.toString();
     }
 
+    private static void setDefaults(HttpsURLConnection con) {
+
+        con.setConnectTimeout(30 * 1000);// 30s
+        con.setReadTimeout(30 * 1000);// 30s
+
+        // set default user agent
+        if (null == con.getRequestProperty("User-Agent")) {
+            con.setRequestProperty("User-Agent", USER_AGENT);
+        }
+
+        // add default cookies
+        if (getCookies().length() > 0) {
+            con.addRequestProperty("Cookie", getCookies());
+        }
+    }
+
     /**
-     * Download (via HTTP) the text file located at the supplied URL, and return its contents.
+     * Download (via HTTP) the text file located at the supplied URL, and return its
-     * Primarily intended for downloading web pages.
+     * contents. Primarily intended for downloading web pages.
      *
      * @param siteUrl the URL of the text file to download
      * @return the contents of the specified text file
@@ -152,7 +168,57 @@ public class Downloader implements org.schabi.newpipe.extractor.Downloader {
     public String download(String siteUrl) throws IOException, ReCaptchaException {
         URL url = new URL(siteUrl);
         HttpsURLConnection con = (HttpsURLConnection) url.openConnection();
-        //HttpsURLConnection con = NetCipher.getHttpsURLConnection(url);
+        // HttpsURLConnection con = NetCipher.getHttpsURLConnection(url);
         return dl(con);
     }
+
+    @Override
+    public DownloadResponse get(String siteUrl, DownloadRequest request)
+            throws IOException, ReCaptchaException {
+        URL url = new URL(siteUrl);
+        HttpsURLConnection con = (HttpsURLConnection) url.openConnection();
+        for (Map.Entry<String, List<String>> pair : request.getRequestHeaders().entrySet()) {
+            for(String value: pair.getValue()) {
+                con.addRequestProperty(pair.getKey(), value);
+            }
+        }
+        String responseBody = dl(con);
+        return new DownloadResponse(responseBody, con.getHeaderFields());
+    }
+
+    @Override
+    public DownloadResponse get(String siteUrl) throws IOException, ReCaptchaException {
+        return get(siteUrl, DownloadRequest.emptyRequest);
+    }
+
+    @Override
+    public DownloadResponse post(String siteUrl, DownloadRequest request)
+            throws IOException, ReCaptchaException {
+        URL url = new URL(siteUrl);
+        HttpsURLConnection con = (HttpsURLConnection) url.openConnection();
+        con.setRequestMethod("POST");
+        for (Map.Entry<String, List<String>> pair : request.getRequestHeaders().entrySet()) {
+            for(String value: pair.getValue()) {
+                con.addRequestProperty(pair.getKey(), value);
+            }
+        }
+        // set fields to default if not set already
+        setDefaults(con);
+
+        if(null != request.getRequestBody()) {
+            byte[] postDataBytes = request.getRequestBody().getBytes("UTF-8");
+            con.setRequestProperty("Content-Length", String.valueOf(postDataBytes.length));
+            con.setDoOutput(true);
+            con.getOutputStream().write(postDataBytes);
+        }
+
+        StringBuilder sb = new StringBuilder();
+        try (BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()))) {
+            String inputLine;
+            while ((inputLine = in.readLine()) != null) {
+                sb.append(inputLine);
+            }
+        }
+        return new DownloadResponse(sb.toString(), con.getHeaderFields());
+    }
 }

extractor/src/test/java/org/schabi/newpipe/extractor/services/youtube/YoutubeCommentsExtractorTest.java

@@ -0,0 +1,93 @@
+package org.schabi.newpipe.extractor.services.youtube;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+import static org.schabi.newpipe.extractor.ServiceList.YouTube;
+
+import java.io.IOException;
+import java.util.List;
+
+import org.jsoup.helper.StringUtil;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.schabi.newpipe.Downloader;
+import org.schabi.newpipe.extractor.ListExtractor.InfoItemsPage;
+import org.schabi.newpipe.extractor.NewPipe;
+import org.schabi.newpipe.extractor.comments.CommentsInfo;
+import org.schabi.newpipe.extractor.comments.CommentsInfoItem;
+import org.schabi.newpipe.extractor.exceptions.ExtractionException;
+import org.schabi.newpipe.extractor.services.youtube.extractors.YoutubeCommentsExtractor;
+import org.schabi.newpipe.extractor.utils.Localization;
+
+public class YoutubeCommentsExtractorTest {
+
+    private static YoutubeCommentsExtractor extractor;
+
+    @BeforeClass
+    public static void setUp() throws Exception {
+        NewPipe.init(Downloader.getInstance(), new Localization("GB", "en"));
+        extractor = (YoutubeCommentsExtractor) YouTube
+                .getCommentsExtractor("https://www.youtube.com/watch?v=rrgFN3AxGfs");
+    }
+
+    @Test
+    public void testGetComments() throws IOException, ExtractionException {
+        boolean result = false;
+        InfoItemsPage<CommentsInfoItem> comments = extractor.getInitialPage();
+        result = findInComments(comments, "i should really be in the top comment.lol");
+
+        while (comments.hasNextPage() && !result) {
+            comments = extractor.getPage(comments.getNextPageUrl());
+            result = findInComments(comments, "i should really be in the top comment.lol");
+        }
+
+        assertTrue(result);
+    }
+
+    @Test
+    public void testGetCommentsFromCommentsInfo() throws IOException, ExtractionException {
+        boolean result = false;
+        CommentsInfo commentsInfo = CommentsInfo.getInfo("https://www.youtube.com/watch?v=rrgFN3AxGfs");
+        assertTrue("what the fuck am i doing with my life.wmv".equals(commentsInfo.getName()));
+        result = findInComments(commentsInfo.getRelatedItems(), "i should really be in the top comment.lol");
+
+        String nextPage = commentsInfo.getNextPageUrl();
+        while (!StringUtil.isBlank(nextPage) && !result) {
+            InfoItemsPage<CommentsInfoItem> moreItems = CommentsInfo.getMoreItems(YouTube, commentsInfo, nextPage);
+            result = findInComments(moreItems.getItems(), "i should really be in the top comment.lol");
+            nextPage = moreItems.getNextPageUrl();
+        }
+
+        assertTrue(result);
+    }
+    
+    @Test
+    public void testGetCommentsAllData() throws IOException, ExtractionException {
+        InfoItemsPage<CommentsInfoItem> comments = extractor.getInitialPage();
+        for(CommentsInfoItem c: comments.getItems()) {
+            assertFalse(StringUtil.isBlank(c.getAuthorEndpoint()));
+            assertFalse(StringUtil.isBlank(c.getAuthorName()));
+            assertFalse(StringUtil.isBlank(c.getAuthorThumbnail()));
+            assertFalse(StringUtil.isBlank(c.getCommentId()));
+            assertFalse(StringUtil.isBlank(c.getCommentText()));
+            assertFalse(StringUtil.isBlank(c.getName()));
+            assertFalse(StringUtil.isBlank(c.getPublishedTime()));
+            assertFalse(StringUtil.isBlank(c.getThumbnailUrl()));
+            assertFalse(StringUtil.isBlank(c.getUrl()));
+            assertFalse(c.getLikeCount() == null);
+        }
+    }
+
+    private boolean findInComments(InfoItemsPage<CommentsInfoItem> comments, String comment) {
+        return findInComments(comments.getItems(), comment);
+    }
+
+    private boolean findInComments(List<CommentsInfoItem> comments, String comment) {
+        for(CommentsInfoItem c: comments) {
+            if(c.getCommentText().contains(comment)) {
+                return true;
+            }
+        }
+        return false;
+    }
+}

extractor/src/test/java/org/schabi/newpipe/extractor/utils/JsonUtilsTest.java

@@ -0,0 +1,47 @@
+package org.schabi.newpipe.extractor.utils;
+
+
+import static org.junit.Assert.assertTrue;
+
+import java.util.List;
+
+import org.junit.Test;
+import org.schabi.newpipe.extractor.exceptions.ParsingException;
+
+import com.grack.nanojson.JsonArray;
+import com.grack.nanojson.JsonObject;
+import com.grack.nanojson.JsonParser;
+import com.grack.nanojson.JsonParserException;
+
+
+public class JsonUtilsTest {
+    
+    @Test
+    public void testGetValueFlat() throws JsonParserException, ParsingException {
+        JsonObject obj = JsonParser.object().from("{\"name\":\"John\",\"age\":30,\"cars\":{\"car1\":\"Ford\",\"car2\":\"BMW\",\"car3\":\"Fiat\"}}");
+        assertTrue("John".equals(JsonUtils.getValue(obj, "name")));        
+    }
+    
+    @Test
+    public void testGetValueNested() throws JsonParserException, ParsingException {
+        JsonObject obj = JsonParser.object().from("{\"name\":\"John\",\"age\":30,\"cars\":{\"car1\":\"Ford\",\"car2\":\"BMW\",\"car3\":\"Fiat\"}}");
+        assertTrue("BMW".equals(JsonUtils.getValue(obj, "cars.car2")));
+    }
+    
+    @Test
+    public void testGetArray() throws JsonParserException, ParsingException {
+        JsonObject obj = JsonParser.object().from("{\"id\":\"0001\",\"type\":\"donut\",\"name\":\"Cake\",\"ppu\":0.55,\"batters\":{\"batter\":[{\"id\":\"1001\",\"type\":\"Regular\"},{\"id\":\"1002\",\"type\":\"Chocolate\"},{\"id\":\"1003\",\"type\":\"Blueberry\"},{\"id\":\"1004\",\"type\":\"Devil's Food\"}]},\"topping\":[{\"id\":\"5001\",\"type\":\"None\"},{\"id\":\"5002\",\"type\":\"Glazed\"},{\"id\":\"5005\",\"type\":\"Sugar\"},{\"id\":\"5007\",\"type\":\"Powdered Sugar\"},{\"id\":\"5006\",\"type\":\"Chocolate with Sprinkles\"},{\"id\":\"5003\",\"type\":\"Chocolate\"},{\"id\":\"5004\",\"type\":\"Maple\"}]}");
+        JsonArray arr = (JsonArray) JsonUtils.getValue(obj, "batters.batter");
+        assertTrue(!arr.isEmpty());
+    }
+    
+    @Test
+    public void testGetValues() throws JsonParserException, ParsingException {
+        JsonObject obj = JsonParser.object().from("{\"id\":\"0001\",\"type\":\"donut\",\"name\":\"Cake\",\"ppu\":0.55,\"batters\":{\"batter\":[{\"id\":\"1001\",\"type\":\"Regular\"},{\"id\":\"1002\",\"type\":\"Chocolate\"},{\"id\":\"1003\",\"type\":\"Blueberry\"},{\"id\":\"1004\",\"type\":\"Devil's Food\"}]},\"topping\":[{\"id\":\"5001\",\"type\":\"None\"},{\"id\":\"5002\",\"type\":\"Glazed\"},{\"id\":\"5005\",\"type\":\"Sugar\"},{\"id\":\"5007\",\"type\":\"Powdered Sugar\"},{\"id\":\"5006\",\"type\":\"Chocolate with Sprinkles\"},{\"id\":\"5003\",\"type\":\"Chocolate\"},{\"id\":\"5004\",\"type\":\"Maple\"}]}");
+        JsonArray arr = (JsonArray) JsonUtils.getValue(obj, "topping");
+        List<Object> types = JsonUtils.getValues(arr, "type");
+        assertTrue(types.contains("Chocolate with Sprinkles"));
+        
+    }
+
+}