don't return null for opus file extensions

2 files changed, 6 insertions, 0 deletions

diff --git a/src/main/java/de/pixart/messenger/persistance/FileBackend.java b/src/main/java/de/pixart/messenger/persistance/FileBackend.java
index ce8219f6e..3a53d31b9 100644
--- a/src/main/java/de/pixart/messenger/persistance/FileBackend.java
+++ b/src/main/java/de/pixart/messenger/persistance/FileBackend.java
@@ -341,6 +341,9 @@ public class FileBackend {
         if (extension == null) {
             extension = getExtensionFromUri(uri);
         }
+        if (extension == null) {
+            extension = MimeUtils.guessExtensionFromMimeType(mime);
+        }
         String filename = fileDateFormat.format(new Date(message.getTimeSent())) + "_" + message.getUuid().substring(0, 4);
         message.setRelativeFilePath(filename + "." + extension);
         copyFileToPrivateStorage(mXmppConnectionService.getFileBackend().getFile(message), uri);
diff --git a/src/main/java/de/pixart/messenger/utils/MimeUtils.java b/src/main/java/de/pixart/messenger/utils/MimeUtils.java
index d2ce21b72..bfcf71c6e 100644
--- a/src/main/java/de/pixart/messenger/utils/MimeUtils.java
+++ b/src/main/java/de/pixart/messenger/utils/MimeUtils.java
@@ -509,6 +509,9 @@ public final class MimeUtils {
         String mimeType;
         try {
             mimeType = context.getContentResolver().getType(uri);
+            if (mimeType != null && mimeType.equals("application/octet-stream")) {
+                mimeType = null;
+            }
         } catch (Throwable throwable) {
             mimeType = null;
         }