[YouTube] Use new continuation API for channels

Co-authored-by: TiA4f8R <74829229+tia4f8r@users.noreply.github.com>

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

@@ -2,10 +2,13 @@ package org.schabi.newpipe.extractor.services.youtube.extractors;
 
 import com.grack.nanojson.JsonArray;
 import com.grack.nanojson.JsonObject;
+import com.grack.nanojson.JsonWriter;
+
 import org.schabi.newpipe.extractor.Page;
 import org.schabi.newpipe.extractor.StreamingService;
 import org.schabi.newpipe.extractor.channel.ChannelExtractor;
 import org.schabi.newpipe.extractor.downloader.Downloader;
+import org.schabi.newpipe.extractor.downloader.Response;
 import org.schabi.newpipe.extractor.exceptions.ContentNotSupportedException;
 import org.schabi.newpipe.extractor.exceptions.ExtractionException;
 import org.schabi.newpipe.extractor.exceptions.ParsingException;
@@ -15,13 +18,20 @@ import org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper;
 import org.schabi.newpipe.extractor.services.youtube.linkHandler.YoutubeChannelLinkHandlerFactory;
 import org.schabi.newpipe.extractor.stream.StreamInfoItem;
 import org.schabi.newpipe.extractor.stream.StreamInfoItemsCollector;
+import org.schabi.newpipe.extractor.utils.JsonUtils;
 import org.schabi.newpipe.extractor.utils.Utils;
 
 import javax.annotation.Nonnull;
 import java.io.IOException;
 
-import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.*;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.fixThumbnailUrl;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getClientVersion;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getJsonResponse;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getTextFromObject;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getKey;
+import static org.schabi.newpipe.extractor.services.youtube.YoutubeParsingHelper.getValidJsonResponseBody;
 import static org.schabi.newpipe.extractor.utils.Utils.EMPTY_STRING;
+import static org.schabi.newpipe.extractor.utils.Utils.UTF_8;
 import static org.schabi.newpipe.extractor.utils.Utils.isNullOrEmpty;
 
 /*
@@ -226,7 +236,7 @@ public class YoutubeChannelExtractor extends ChannelExtractor {
 
     @Nonnull
     @Override
-    public InfoItemsPage<StreamInfoItem> getInitialPage() throws ExtractionException {
+    public InfoItemsPage<StreamInfoItem> getInitialPage() throws IOException, ExtractionException {
         final StreamInfoItemsCollector collector = new StreamInfoItemsCollector(getServiceId());
 
         Page nextPage = null;
@@ -254,18 +264,36 @@ public class YoutubeChannelExtractor extends ChannelExtractor {
         // as they don't deliver enough information on their own (the channel name, for example).
         fetchPage();
 
-        StreamInfoItemsCollector collector = new StreamInfoItemsCollector(getServiceId());
+        // @formatter:off
-        final JsonArray ajaxJson = getJsonResponse(page.getUrl(), getExtractorLocalization());
+        byte[] json = JsonWriter.string()
+                .object()
+                .object("context")
+                .object("client")
+                .value("clientName", "1")
+                .value("clientVersion", getClientVersion())
+                .end()
+                .end()
+                .value("continuation", page.getId())
+                .end()
+                .done()
+                .getBytes(UTF_8);
+        // @formatter:on
 
-        JsonObject sectionListContinuation = ajaxJson.getObject(1).getObject("response")
+        StreamInfoItemsCollector collector = new StreamInfoItemsCollector(getServiceId());
-                .getArray("onResponseReceivedActions").getObject(0).getObject("appendContinuationItemsAction");
+        final Response response = getDownloader().post(page.getUrl(), null, json, getExtractorLocalization());
+
+        final JsonObject ajaxJson = JsonUtils.toJsonObject(getValidJsonResponseBody(response));
+
+        JsonObject sectionListContinuation = ajaxJson.getArray("onResponseReceivedActions")
+                .getObject(0)
+                .getObject("appendContinuationItemsAction");
 
         final JsonObject continuation = collectStreamsFrom(collector, sectionListContinuation.getArray("continuationItems"));
 
         return new InfoItemsPage<>(collector, getNextPageFrom(continuation));
     }
 
-    private Page getNextPageFrom(final JsonObject continuations) {
+    private Page getNextPageFrom(final JsonObject continuations) throws IOException, ExtractionException {
         if (isNullOrEmpty(continuations)) {
             return null;
         }
@@ -273,8 +301,8 @@ public class YoutubeChannelExtractor extends ChannelExtractor {
         final JsonObject continuationEndpoint = continuations.getObject("continuationEndpoint");
         final String continuation = continuationEndpoint.getObject("continuationCommand").getString("token");
         final String clickTrackingParams = continuationEndpoint.getString("clickTrackingParams");
-        return new Page("https://www.youtube.com/browse_ajax?ctoken=" + continuation
+        return new Page("https://www.youtube.com/youtubei/v1/browse?key=" + getKey(),
-                + "&continuation=" + continuation + "&itct=" + clickTrackingParams);
+                continuation);
     }
 
     /**

extractor/src/test/resources/org/schabi/newpipe/extractor/services/youtube/extractor/channel/notAvailable/generated_mock_2.json

@@ -20,7 +20,7 @@
   },
   "response": {
     "responseCode": 404,
-    "responseMessage": "",
+    "responseMessage": "Not Found",
     "responseHeaders": {
       "alt-svc": [
         "h3-29\u003d\":443\"; ma\u003d2592000,h3-T051\u003d\":443\"; ma\u003d2592000,h3-Q050\u003d\":443\"; ma\u003d2592000,h3-Q046\u003d\":443\"; ma\u003d2592000,h3-Q043\u003d\":443\"; ma\u003d2592000,quic\u003d\":443\"; ma\u003d2592000; v\u003d\"46,43\""
@@ -32,7 +32,7 @@
         "text/html; charset\u003dutf-8"
       ],
       "date": [
-        "Sat, 13 Feb 2021 19:13:39 GMT"
+        "Thu, 04 Mar 2021 14:15:28 GMT"
       ],
       "expires": [
         "Mon, 01 Jan 1990 00:00:00 GMT"
@@ -47,12 +47,15 @@
         "ESF"
       ],
       "set-cookie": [
-        "YSC\u003dbFLZyqvSsDQ; Domain\u003d.youtube.com; Path\u003d/; Secure; HttpOnly; SameSite\u003dnone",
+        "YSC\u003dOHweFRBSiuo; Domain\u003d.youtube.com; Path\u003d/; Secure; HttpOnly; SameSite\u003dnone",
-        "VISITOR_INFO1_LIVE\u003dYgNWpn3F6Ww; Domain\u003d.youtube.com; Expires\u003dThu, 12-Aug-2021 19:13:39 GMT; Path\u003d/; Secure; HttpOnly; SameSite\u003dnone"
+        "VISITOR_INFO1_LIVE\u003dDjGaxgk-6jk; Domain\u003d.youtube.com; Expires\u003dTue, 31-Aug-2021 14:15:28 GMT; Path\u003d/; Secure; HttpOnly; SameSite\u003dnone"
       ],
       "strict-transport-security": [
         "max-age\u003d31536000"
       ],
+      "transfer-encoding": [
+        "chunked"
+      ],
       "x-content-type-options": [
         "nosniff"
       ],
@@ -63,7 +66,7 @@
         "0"
       ]
     },
-    "responseBody": "\u003chtml lang\u003d\"en-GB\" dir\u003d\"ltr\"\u003e\u003chead\u003e\u003ctitle\u003e404 Not Found\u003c/title\u003e\u003cstyle nonce\u003d\"AkiRKVBSwx7zy61zR/BBpg\"\u003e*{margin:0;padding:0;border:0}html,body{height:100%;}\u003c/style\u003e\u003clink rel\u003d\"shortcut icon\" href\u003d\"https://www.youtube.com/img/favicon.ico\" type\u003d\"image/x-icon\"\u003e\u003clink rel\u003d\"icon\" href\u003d\"https://www.youtube.com/img/favicon_32.png\" sizes\u003d\"32x32\"\u003e\u003clink rel\u003d\"icon\" href\u003d\"https://www.youtube.com/img/favicon_48.png\" sizes\u003d\"48x48\"\u003e\u003clink rel\u003d\"icon\" href\u003d\"https://www.youtube.com/img/favicon_96.png\" sizes\u003d\"96x96\"\u003e\u003clink rel\u003d\"icon\" href\u003d\"https://www.youtube.com/img/favicon_144.png\" sizes\u003d\"144x144\"\u003e\u003c/head\u003e\u003cbody\u003e\u003ciframe style\u003d\"display:block;border:0;\" src\u003d\"/error?src\u003d404\u0026amp;ifr\u003d1\u0026amp;error\u003d\" width\u003d\"100%\" height\u003d\"100%\" frameborder\u003d\"\\\" scrolling\u003d\"no\"\u003e\u003c/iframe\u003e\u003c/body\u003e\u003c/html\u003e",
+    "responseBody": "\u003chtml lang\u003d\"en-GB\" dir\u003d\"ltr\"\u003e\u003chead\u003e\u003ctitle\u003e404 Not Found\u003c/title\u003e\u003cstyle nonce\u003d\"H7HK+DtuIlOkI+rlUnUlnQ\"\u003e*{margin:0;padding:0;border:0}html,body{height:100%;}\u003c/style\u003e\u003clink rel\u003d\"shortcut icon\" href\u003d\"https://www.youtube.com/img/favicon.ico\" type\u003d\"image/x-icon\"\u003e\u003clink rel\u003d\"icon\" href\u003d\"https://www.youtube.com/img/favicon_32.png\" sizes\u003d\"32x32\"\u003e\u003clink rel\u003d\"icon\" href\u003d\"https://www.youtube.com/img/favicon_48.png\" sizes\u003d\"48x48\"\u003e\u003clink rel\u003d\"icon\" href\u003d\"https://www.youtube.com/img/favicon_96.png\" sizes\u003d\"96x96\"\u003e\u003clink rel\u003d\"icon\" href\u003d\"https://www.youtube.com/img/favicon_144.png\" sizes\u003d\"144x144\"\u003e\u003c/head\u003e\u003cbody\u003e\u003ciframe style\u003d\"display:block;border:0;\" src\u003d\"/error?src\u003d404\u0026amp;ifr\u003d1\u0026amp;error\u003d\" width\u003d\"100%\" height\u003d\"100%\" frameborder\u003d\"\\\" scrolling\u003d\"no\"\u003e\u003c/iframe\u003e\u003c/body\u003e\u003c/html\u003e",
     "latestUrl": "https://www.youtube.com/channel/DOESNT-EXIST/videos?pbj\u003d1\u0026view\u003d0\u0026flow\u003dgrid"
   }
 }