Change dash parser exception handling

Author: mauriciocolli

stream/StreamInfo.java

@@ -5,7 +5,9 @@
 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.Utils;
 
+import java.io.FileNotFoundException;
 import java.util.List;
 import java.util.Vector;
 
@@ -137,7 +139,12 @@ private static StreamInfo extractStreams(StreamInfo streamInfo, StreamExtractor
                 // find a similar stream in the respective lists (calling Stream#equalStats).
                 DashMpdParser.getStreams(streamInfo);
             } catch (Exception e) {
-                streamInfo.addException(new ExtractionException("Couldn't get streams from dash mpd", e));
+                // Sometimes we receive 403 (forbidden) error when trying to download the manifest,
+                // (similar to https://github.com/rg3/youtube-dl/blob/master/youtube_dl/extractor/youtube.py#L1888)
+                // just skip the exception, as we later check if we have any streams
+                if (!Utils.hasCauseThrowable(e, FileNotFoundException.class)) {
+                    streamInfo.addException(new ExtractionException("Couldn't get streams from dash mpd", e));
+                }
             }
         }
 

utils/Utils.java

@@ -17,4 +17,21 @@ private Utils() {
     public static String removeNonDigitCharacters(String toRemove) {
         return toRemove.replaceAll("\\D+", "");
     }
+
+    /**
+     * Check if throwable have the cause
+     */
+    public static boolean hasCauseThrowable(Throwable throwable, Class<?> causeToCheck) {
+        // Check if getCause is not the same as cause (the getCause is already the root),
+        // as it will cause a infinite loop if it is
+        Throwable cause,  getCause = throwable;
+
+        while ((cause = throwable.getCause()) != null && getCause != cause) {
+            getCause = cause;
+            if (cause.getClass().isAssignableFrom(causeToCheck)) {
+                return true;
+            }
+        }
+        return false;
+    }
 }