Simple XBMC/Kodi controller via http POST request and JSONRPC

rpi.py

#!/usr/bin/python
'''
    Very simple XBMC/Kodi controller via http POST request and JSONRPC
    (testing the principle..)
'''
import httplib
import sys, argparse
import json

PI   = '192.168.162.33'
PORT = 80

version = 'v0.5.1'
headers = {"Content-type": "application/json", "Accept": "text/plain"}
#headers = {"Content-type": "application/json; charset=UTF-8"}
requ_obj = {"jsonrpc": "2.0", "id": 1, "method": "", "params":{}}
con = httplib.HTTPConnection(PI, PORT, timeout=5)

#req_vol = {"jsonrpc": "2.0", "method": "Application.GetProperties", "params": {"properties": ["volume"]}, "id": 1}
#req_home = {"jsonrpc": "2.0", "method": "Input.home", "id": 1}

cmd = { "get_vol": {"method": "Application.GetProperties", "params": {"properties": ["volume"]}},
        "set_vol": {"method": "Application.SetVolume", "params": {"volume":100}},
        "mute": {"method": "Application.SetMute", "params":{"mute":"toggle"}},
        "pause": {"method": "Player.PlayPause", "params": { "playerid": 1 }},
        "stop": {"method": "Player.Stop", "params": { "playerid": 1 }},
        "pos": {"method": "Player.GetProperties", "params": {"properties": ["percentage"], "playerid": 1}},
        "home": {"method": "Input.home"},
        "back": {"method":"Input.Back"},
        "reboot": {"method":"System.Reboot"},
        "off": {"method":"System.Shutdown"}
        }

descr = {"get_vol": "returns actual volume",
        "set_vol": "set volume (0..100)",
        "mute": "toggle mute",
        "pause": "pause player",
        "stop": "stop playing",
        "pos": "show actual position in %",
        "home": "menu: returns to home screen",
        "back": "menu: one step back",
        "reboot": "reboot raspberry pi",
        "off": "shutdown raspberry pi"
        }


def send_request(req):
    req_par = requ_obj.copy()
    req_par.update(cmd[req])
    params = json.dumps(req_par)
    con.request("POST", "/jsonrpc", params, headers)
    resp = con.getresponse()
    
    if resp.status==200:
        ret = json.loads(resp.read())
        #print(ret)
        if ret['jsonrpc']==u'2.0':
            if 'return' in ret:
                print(ret['return'])
            if 'result' in ret:
                print(ret['result'])
            if 'error' in ret:
                print('!error:')
                print(ret['error'])
        else:
            print('!ERROR: no jsonrpc object.')
            print(ret)
    else:
        print(resp.status, resp.reason)
    

def print_help():
    print(' RPi/kodi cmd tool %s' %version)
    print('# Not a valid command or missing command!')
    print(' use:\n  %s [cmd] <par>\n' % sys.argv[0])
    print('valid commands:')
    for c in cmd.keys():
        print('  %s  - %s' % (c,descr[c]) )
    print('\noptional parameter:\n e.g. %s set_vol 80\n' % sys.argv[0])


def main():
    '''Where everything starts'''
    if (len(sys.argv)<=1) or (sys.argv[1].lower() not in cmd.keys()):
        print_help()
        sys.exit(1)
    try:
        # only to check if connected, request works without
        con.connect()
    except Exception, e:
        print('Failed to connect:')
        print(e)
        sys.exit(2)

    if (len(sys.argv)>2) and sys.argv[2].isdigit():
        if sys.argv[1]=='set_vol':
            val = int(sys.argv[2])
            if val>100:
                val=100;
            cmd['set_vol']['params']['volume']=val
    
    send_request(sys.argv[1])

    con.close()



if __name__ == '__main__':
    #sys.argv.extend(['get_vol','72'])
    main()