O2jam Server ✦

To implement an feature, you typically need to simulate the original game server behavior: handle login, song selection, score submission, ranking, and possibly multiplayer room synchronization.

class O2JamProtocol(asyncio.Protocol): def connection_made(self, transport): self.transport = transport self.peername = transport.get_extra_info('peername') print(f"Connected: self.peername") self.buffer = b"" o2jam server

def data_received(self, data): self.buffer += data while len(self.buffer) >= 3: cmd, pkt_len = struct.unpack("!BH", self.buffer[:3]) if len(self.buffer) < 3 + pkt_len: break payload = self.buffer[3:3+pkt_len] self.buffer = self.buffer[3+pkt_len:] self.handle_packet(cmd, payload) To implement an feature, you typically need to

# Submit score (song_id=1, score=150000, acc=98.5) send(0x03, b"1,150000,98.5") print("Submit result:", await reader.read(1024)) To implement an feature

def send(cmd, data=b""): writer.write(struct.pack("!BH", cmd, len(data)) + data)

def connection_lost(self, exc): print(f"Disconnected: self.peername") async def main(): loop = asyncio.get_running_loop() server = await loop.create_server( lambda: O2JamProtocol(), '0.0.0.0', 10001 ) print("O2Jam server listening on port 10001") async with server: await server.serve_forever()