play url on tv

tv.py

#!/usr/bin/env python3

from contextlib import contextmanager

import re
import select
import socket
import sys
import urllib.request


@contextmanager
def send_udp(_from, to, packet):
    sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
    sock.bind(_from)
    sock.sendto(packet.encode(), to)
    yield sock
    sock.close()


def discover():
    payload = "\r\n".join([
        'M-SEARCH * HTTP/1.1',
        'User-Agent: TestProgram/0.1',
        'HOST: 239.255.255.250:1900',
        'Accept: */*',
        'MAN: "ssdp:discover"',
        'ST: urn:schemas-upnp-org:service:AVTransport:1',
        'MX: 3',
        '',
        ''])
    _from = ("192.168.1.101", 0)
    to = ("239.255.255.250", 1900)
    with send_udp(_from, to, payload) as s:
        while True:
            r, w, x = select.select([s], [], [s], 1)
            if s in r:
                data, addr = s.recvfrom(1024)
                addr = re.search('(http://[^/]*/)', data.decode()).group(1)
                return addr


def set_uri(uri, device):
    payload = ''.join([
        "<?xml version='1.0' encoding='utf-8'?>",
        '<SOAP-ENV:Envelope '
        'xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" '
        'SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">',
        '<SOAP-ENV:Body>',
        '<m:SetAVTransportURI '
        'xmlns:m="urn:schemas-upnp-org:service:AVTransport:1">',
        '<InstanceID>0</InstanceID>',
        '<CurrentURI>{}</CurrentURI>'.format(uri),
        '<CurrentURIMetaData></CurrentURIMetaData>',
        '</m:SetAVTransportURI>',
        '</SOAP-ENV:Body>',
        '</SOAP-ENV:Envelope>'
        ]).encode()

    headers = {
        'SOAPAction': '"urn:schemas-upnp-org:service:'
                      'AVTransport:1#SetAVTransportURI"',
        'Content-Type': 'text/xml'
        }
    device_addr = device + '_urn:schemas-upnp-org:service:AVTransport_control'
    req = urllib.request.Request(device_addr, data=payload, headers=headers)
    resp = urllib.request.urlopen(req)
    print('Server response code:', resp.getcode())


if __name__ == '__main__':
    uri = 'http://192.168.1.101:2015/t1/index.m3u8'
    if len(sys.argv) == 2:
        uri = sys.argv[1]
    device = discover()
    set_uri(uri, device)