Add support for on.soundcloud.com urls (#1179)

Add support for on.soundcloud.com urls

Fixes #1178

Co-authored-by: TobiGr <tobigr@users.noreply.github.com>

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

@@ -45,6 +45,7 @@ import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
+import java.util.regex.Pattern;
 
 public final class SoundcloudParsingHelper {
     // CHECKSTYLE:OFF
@@ -88,6 +89,10 @@ public final class SoundcloudParsingHelper {
     private static String clientId;
     public static final String SOUNDCLOUD_API_V2_URL = "https://api-v2.soundcloud.com/";
 
+    private static final Pattern ON_URL_PATTERN = Pattern.compile(
+        "^https?://on.soundcloud.com/[0-9a-zA-Z]+$"
+    );
+
     private SoundcloudParsingHelper() {
     }
 
@@ -185,8 +190,21 @@ public final class SoundcloudParsingHelper {
      */
     public static String resolveIdWithWidgetApi(final String urlString) throws IOException,
             ParsingException {
-        // Remove the tailing slash from URLs due to issues with the SoundCloud API
         String fixedUrl = urlString;
+
+        // if URL is an on.soundcloud link, do a request to resolve the redirect
+
+        if (ON_URL_PATTERN.matcher(fixedUrl).find()) {
+            try {
+                fixedUrl = NewPipe.getDownloader().head(fixedUrl).latestUrl();
+                // remove tracking params which are in the query string
+                fixedUrl = fixedUrl.split("\\?")[0];
+            } catch (final ExtractionException e) {
+                throw new ParsingException("Could not follow on.soundcloud.com redirect", e);
+            }
+        }
+
+        // Remove the tailing slash from URLs due to issues with the SoundCloud API
         if (fixedUrl.charAt(fixedUrl.length() - 1) == '/') {
             fixedUrl = fixedUrl.substring(0, fixedUrl.length() - 1);
         }

extractor/src/main/java/org/schabi/newpipe/extractor/services/soundcloud/linkHandler/SoundcloudStreamLinkHandlerFactory.java

@@ -9,7 +9,8 @@ import org.schabi.newpipe.extractor.utils.Utils;
 public final class SoundcloudStreamLinkHandlerFactory extends LinkHandlerFactory {
     private static final SoundcloudStreamLinkHandlerFactory INSTANCE
             = new SoundcloudStreamLinkHandlerFactory();
-    private static final String URL_PATTERN = "^https?://(www\\.|m\\.)?soundcloud.com/[0-9a-z_-]+"
+    private static final String URL_PATTERN = "^https?://(www\\.|m\\.|on\\.)?"
+            + "soundcloud.com/[0-9a-z_-]+"
             + "/(?!(tracks|albums|sets|reposts|followers|following)/?$)[0-9a-z_-]+/?([#?].*)?$";
     private static final String API_URL_PATTERN = "^https?://api-v2\\.soundcloud.com"
             + "/(tracks|albums|sets|reposts|followers|following)/([0-9a-z_-]+)/";

extractor/src/test/java/org/schabi/newpipe/extractor/services/soundcloud/SoundcloudParsingHelperTest.java

@@ -25,6 +25,10 @@ class SoundcloudParsingHelperTest {
     void resolveIdWithWidgetApiTest() throws Exception {
         assertEquals("26057743", SoundcloudParsingHelper.resolveIdWithWidgetApi("https://soundcloud.com/trapcity"));
         assertEquals("16069159", SoundcloudParsingHelper.resolveIdWithWidgetApi("https://soundcloud.com/nocopyrightsounds"));
+
+        assertEquals("26057743", SoundcloudParsingHelper.resolveIdWithWidgetApi("https://on.soundcloud.com/Rr2JyfFcYwbawpw49"));
+        assertEquals("1818813498", SoundcloudParsingHelper.resolveIdWithWidgetApi("https://on.soundcloud.com/a8QmYdMnmxnsSTEp9"));
+        assertEquals("1468401502", SoundcloudParsingHelper.resolveIdWithWidgetApi("https://on.soundcloud.com/rdt7e"));
     }
 
 }