OO-4375 Fixed revision path - null or out of bounds exception

src/main/java/org/olat/admin/sysinfo/LargeFilesController.java

@@ -157,10 +157,13 @@ public class LargeFilesController extends FormBasicController implements Extende
 				String[] path = contentRow.getPath().split("/");
 
 				StringBuilder sb = new StringBuilder(path[0]);
-				sb.append("/").append(path[1]);
-				if(path.length > 2) {
-					sb.append("/...");
+				if(path.length > 1) {
+					sb.append("/").append(path[1]);
+					if(path.length > 2) {
+						sb.append("/...");
+					}
 				}
+				
 				FormLink pathInfo = uifactory.addFormLink("pathinfo_" + counter.incrementAndGet() , "pathInfo", sb.toString(), null, null, Link.NONTRANSLATED);
 				pathInfo.setUserObject(contentRow);
 				contentRow.setPathInfo(pathInfo);

src/main/java/org/olat/admin/sysinfo/model/LargeFilesTableContentRow.java

@@ -76,8 +76,8 @@ public class LargeFilesTableContentRow {
 		author = rev.getAuthor();
 		path = rev.getMetadata().getRelativePath();
 		revision = true;
-		fileType = WebappHelper.getMimeType(rev.getFilename()).split("/")[1];
-		fileCategory = WebappHelper.getMimeType(rev.getFilename()).split("/")[0];
+		fileType = WebappHelper.getMimeType(rev.getFilename()) != null ? WebappHelper.getMimeType(rev.getFilename()).split("/")[1] : "Unknown";
+		fileCategory = WebappHelper.getMimeType(rev.getFilename()) != null ? WebappHelper.getMimeType(rev.getFilename()).split("/")[0] : "Unknown";
 		createdAt = rev.getCreationDate();
 		lastModifiedAt = rev.getFileLastModified();
 		license = rev.getMetadata().getLicenseType();