Add non-streaming websocket server for python (#259)

python-api-examples/offline-websocket-client-decode-files-sequential.py

@@ -116,11 +116,18 @@ async def run(
             assert isinstance(sample_rate, int)
             assert samples.dtype == np.float32, samples.dtype
             assert samples.ndim == 1, samples.dim
+
             buf = sample_rate.to_bytes(4, byteorder="little")  # 4 bytes
             buf += (samples.size * 4).to_bytes(4, byteorder="little")
             buf += samples.tobytes()
 
-            await websocket.send(buf)
+            payload_len = 10240
+            while len(buf) > payload_len:
+                await websocket.send(buf[:payload_len])
+                buf = buf[payload_len:]
+
+            if buf:
+                await websocket.send(buf)
 
             decoding_results = await websocket.recv()
             print(decoding_results)