1 files changed, 52 insertions, 0 deletions
diff --git a/yt_dlp/downloader/niconico.py b/yt_dlp/downloader/niconico.py
new file mode 100644
index 0000000..77ed39e
--- /dev/null
+++ b/yt_dlp/downloader/niconico.py
@@ -0,0 +1,52 @@
+import threading
+
+from . import get_suitable_downloader
+from .common import FileDownloader
+from ..utils import sanitized_Request
+
+
+class NiconicoDmcFD(FileDownloader):
+    """ Downloading niconico douga from DMC with heartbeat """
+
+    def real_download(self, filename, info_dict):
+        from ..extractor.niconico import NiconicoIE
+
+        self.to_screen('[%s] Downloading from DMC' % self.FD_NAME)
+        ie = NiconicoIE(self.ydl)
+        info_dict, heartbeat_info_dict = ie._get_heartbeat_info(info_dict)
+
+        fd = get_suitable_downloader(info_dict, params=self.params)(self.ydl, self.params)
+
+        success = download_complete = False
+        timer = [None]
+        heartbeat_lock = threading.Lock()
+        heartbeat_url = heartbeat_info_dict['url']
+        heartbeat_data = heartbeat_info_dict['data'].encode()
+        heartbeat_interval = heartbeat_info_dict.get('interval', 30)
+
+        request = sanitized_Request(heartbeat_url, heartbeat_data)
+
+        def heartbeat():
+            try:
+                self.ydl.urlopen(request).read()
+            except Exception:
+                self.to_screen('[%s] Heartbeat failed' % self.FD_NAME)
+
+            with heartbeat_lock:
+                if not download_complete:
+                    timer[0] = threading.Timer(heartbeat_interval, heartbeat)
+                    timer[0].start()
+
+        heartbeat_info_dict['ping']()
+        self.to_screen('[%s] Heartbeat with %d second interval ...' % (self.FD_NAME, heartbeat_interval))
+        try:
+            heartbeat()
+            if type(fd).__name__ == 'HlsFD':
+                info_dict.update(ie._extract_m3u8_formats(info_dict['url'], info_dict['id'])[0])
+            success = fd.real_download(filename, info_dict)
+        finally:
+            if heartbeat_lock:
+                with heartbeat_lock:
+                    timer[0].cancel()
+                    download_complete = True
+        return success