dlna.py 文件源码

def discover_MediaPlayer(self):
        s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
        s.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_TTL, 4)
        s.bind(("", SSDP_BROADCAST_PORT + 20))

        s.sendto(SSDP_BROADCAST_MSG.encode("UTF-8"), (SSDP_BROADCAST_ADDR,
                                                      SSDP_BROADCAST_PORT))

        s.settimeout(5.0)

        devices = []

        while True:

            try:
                data, addr = s.recvfrom(self.SOCKET_BUFSIZE)
                if len(data) is None:
                    continue

            except socket.timeout:
                break

            try:
                info = [a.split(":", 1) for a in data.decode("UTF-8").split("\r\n")[1:]]
                device = dict([(a[0].strip().lower(), a[1].strip()) for a in info if len(a) >= 2])
                devices.append(device)
            except:
                pass

        devices_urls = [device["location"] for device in devices if "AVTransport" in device["st"]]
        devices_urls = list(set(devices_urls))
        devices = []
        for location_url in devices_urls:
            device = self.register_device(location_url)
            if device != None:
                devices.append(device)

        return devices