restreamer: Hack in a path to re-stream "last 20 seconds", for live 'replays'

restreamer/restreamer/main.py

@@ -230,7 +230,28 @@ def generate_media_playlist(channel, quality):
 	return generate_hls.generate_media(segments, os.path.join(app.static_url_path, channel, quality))
 
 
-@app.route('/cut/<channel>/<quality>.ts')
+@app.route('/replay/<stream>/<variant>.m3u8')
+@has_path_args
+def replay(stream, variant):
+	hours_path = os.path.join(app.static_folder, stream, variant)
+	if not os.path.isdir(hours_path):
+		abort(404)
+
+	start = datetime.datetime.utcnow() - datetime.timedelta(seconds=20)
+	end = datetime.datetime.utcnow() - datetime.timedelta(seconds=5)
+
+	segments = get_best_segments(hours_path, start, end)
+	if segments == [None]:
+		print "No replay, serving placeholder"
+		stream, variant = 'ekimekim', 'source'
+		segments = get_best_segments(os.path.join(app.static_folder, stream, variant),
+			datetime.datetime(2019, 5, 14, 9, 58, 46),
+			datetime.datetime(2019, 5, 14, 9, 58, 48),
+		)
+	return generate_hls.generate_media(segments, os.path.join(app.static_url_path, stream, variant))
+
+
+@app.route('/cut/<stream>/<variant>.ts')
 @request_stats
 @has_path_args
 def cut(channel, quality):