diff --git a/dedupfs/dedupfs.py b/dedupfs/dedupfs.py
index 4344fbc..b491930 100644
--- a/dedupfs/dedupfs.py
+++ b/dedupfs/dedupfs.py
@@ -828,6 +828,8 @@ class DedupFS(fuse.Fuse):  # {{{1
                 with open(FIFO_PIPE, 'wb') as pipe:
                     os.unlink(FIFO_PIPE)
                     pipe.write(self.compress(new_block))
+                    # if callable(getattr(pipe, 'flush', None)):
+                    #     pipe.flush()
                 process.wait()
 
                 # self.blocks[digest] = self.compress(new_block)
diff --git a/download_service.py b/download_service.py
index acfc18c..0c81198 100644
--- a/download_service.py
+++ b/download_service.py
@@ -80,13 +80,19 @@ def upload_block(hash_uid):
         os.chdir(path_home)
         entity = client.get_entity(client.get_me())
         FIFO = f"upipe_{hash_uid}"
+
         import errno
         try:
             os.mkfifo(FIFO)
         except OSError as oe:
             if oe.errno != errno.EEXIST:
                 raise
+        messages = client.get_messages(entity, limit=1, search=hash_uid)   
         with open(FIFO, 'rb') as bytesin:
+            if len(messages):
+                bytesin.read(1)
+                bytesin.close()
+                return 0
             message = client.send_file(entity,
                                        file=bytesin,
                                        caption=f'{hash_uid}',
diff --git a/telegram_client_x.py b/telegram_client_x.py
index 9fd9dd9..9acf56b 100644
--- a/telegram_client_x.py
+++ b/telegram_client_x.py
@@ -375,6 +375,8 @@ class TelegramClientX(TelegramClient):
                     cdn_decrypter, result = CdnDecrypter.prepare_decrypter(client, self._get_cdn_client(result), result)
                 else:
                     f.write(result.bytes)
+                    # if callable(getattr(f, 'flush', None)):
+                    #     f.flush()
                     offset += part_size
             except FileMigrateError as e:
                 __log__.info('File lives in another DC')
@@ -410,6 +412,8 @@ class TelegramClientX(TelegramClient):
                 for th in download_thread:
                     if th.result and th.result.bytes:
                         f.write(th.result.bytes)
+                        # if callable(getattr(f, 'flush', None)):
+                        #     f.flush()
                         if progress_callback:
                             progress_callback(f.tell(), file_size)
                     else: