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+-- Forum: Development (https://forum.kodi.tv/forumdisplay.php?fid=32)
+--- Forum: Kodi Application (https://forum.kodi.tv/forumdisplay.php?fid=93)
+---- Forum: JSON-RPC (https://forum.kodi.tv/forumdisplay.php?fid=174)
+---- Thread: JSON, Websocket and live EPG (/showthread.php?tid=341710)
JSON, Websocket and live EPG - danofun - 2019-03-07
Greetings! I'm attempting to build a rudimentary web interface to send Kodi a few commands. I'd like to display what is currently airing on a few specific PVR channels. Thanks to a few examples on these forums, I'm able to connect to Kodi via websocket and retrieve the current on-air data. However, when the next program goes to air the EPG data does not update. Am I missing something or does a change to broadcastnow not trigger a websocket message? Is there another way to acquiring live updated JSON data? You help is greatly appreciated!
html:<html>
<body>
<script language="javascript" type="text/javascript">
var ws = new WebSocket('ws://localhost:9090/jsonrpc');
ws.onopen = function (event) {
send_message("PVR.GetChannelDetails", {
"properties": ["broadcastnow"],
"channelid": 32,
});
}
ws.onmessage = function (event) {
var j = JSON.parse(event.data);
var r = j.result.channeldetails.broadcastnow;
document.getElementById("name").innerHTML = r.title;
}
function send_message(method, params) {
var msg = {
"jsonrpc": "2.0",
"method": method,
"id": method
};
if (params) {
msg.params = params;
}
ws.send(JSON.stringify(msg));
}
</script>
<div id="name"></div>
</body>
</html>
RE: JSON, Websocket and live EPG - danofun - 2019-03-15
A change in EPG does not trigger a websocket message. One solution is to send a command at a set interval which will trigger a websocket message.
javascript:// Automatically refresh EPG data by sending a websocket message at a set interval
function Autoupdate() {
websocketTL.send(JSON.stringify({
"jsonrpc": "2.0",
"method": "Player.GetItem",
"params": {
"properties": ["title"],
"playerid": 1
},
"id": "Player.GetChannelTL"
}));
setInterval(Autoupdate, 60000); // Time in milliseconds
RE: JSON, Websocket and live EPG - MrTarantula - 2019-03-15
It looks like you're only calling PVR.GetChannelDetails only when you open the socket connection. When Autoupdate() runs, r will be null, because on_message will be trying to parse the results from Player.GetItem. Try this:
html:
<html>
<body>
<script language="javascript" type="text/javascript">
var ws = new WebSocket('ws://localhost:9090/jsonrpc');
ws.onmessage = function (event) {
var j = JSON.parse(event.data);
var r = j.result.channeldetails.broadcastnow;
document.getElementById("name").innerHTML = r.title;
};
function send_message(method, params) {
var msg = {
"jsonrpc": "2.0",
"method": method,
"id": method
};
if (params) {
msg.params = params;
}
ws.send(JSON.stringify(msg));
}
setInterval(() => {
send_message("PVR.GetChannelDetails", {
"properties": ["broadcastnow"],
"channelid": 32,
});
}, 60000);
</script>
<div id="name"></div>
</body>
</html>
RE: JSON, Websocket and live EPG - MrTarantula - 2019-03-15
But I hate using timeouts and intervals, so I would check that the value of j.result.channeldetails.broadcastnow is not null when receiving any message, and if it is, then you know you received a notification, and should update the name. This is quick and dirty (and untested):
html:
<html>
<body>
<script language="javascript" type="text/javascript">
var ws = new WebSocket('ws://localhost:9090/jsonrpc');
ws.onmessage = function (event) {
var j = JSON.parse(event.data);
if (j.result && j.result.channeldetails && j.result.channeldetails.broadcastnow) {
var r = j.result.channeldetails.broadcastnow;
document.getElementById("name").innerHTML = r.title;
} else {
send_message("PVR.GetChannelDetails", {
"properties": ["broadcastnow"],
"channelid": 32,
});
}
};
function send_message(method, params) {
var msg = {
"jsonrpc": "2.0",
"method": method,
"id": method
};
if (params) {
msg.params = params;
}
ws.send(JSON.stringify(msg));
}
</script>
<div id="name"></div>
</body>
</html>
RE: JSON, Websocket and live EPG - danofun - 2019-03-16
@MrTarantula Thank you for the reply. I think I have a slightly better grasp on Kodi's websocket request results and notifications. FWIW I put together a front-end controller for the upcoming NCAA basketball tournament. It is currently in a working state but could use some cleanup. Hopefully there's something in there that can help out a future developer.
RE: JSON, Websocket and live EPG - konrul - 2021-11-21
Hello,
I am able to get EPG data (live PVR TV title) which is what I want to get (I couldn't quote the entry, 3rd entry of this thread is working for me; https://forum.kodi.tv/showthread.php?tid=341710&pid=2834357#pid2834357 ). However, the "channelid" is changing every day as a random number. Therefore, I want to get channelid from channel name in my list. How can I do that?
@danofun I have seen your codes in github (danofun/MarchMadnessTVControl). In that file, you have just defined channel names and the system can get channelid automatically. I want to do so as simple as the codes above.
I am sorry if my language is bad. I will be thankful of your help.
Thanks in advance.