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<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
// This simple example subscribes, via websocket, to certain events occurring
// on the BMC. Specfically, it's interested in an d-bus events (object
// creations, property changes), occurring in the d-bus namespaces
// /xyz/openbmc_project/logging and /xyz/openbmc_project/sensors. It's also
// interested in the interfaces xyz.openbmc_project.Logging.Entry and
// xyz.openbmc_project.Sensor.Value being added, or property changes to
// these interfaces.
// Login to the BMC.
var xhr = new XMLHttpRequest();
xhr.open("POST", "https://<BMC IP>/login", true);
// Set 'withCredentials' to be able to send back login session cookie.
xhr.withCredentials = true;
xhr.setRequestHeader("Content-type", "application/json");
xhr.send(JSON.stringify({data: ["<username>", "<password>"]}));
// Open a new secure websocket. The rest server on the BMC
// only supports the /subscribe route with websockets as of now.
var ws = new WebSocket("wss://<BMC IP>/subscribe");
// Send in array of d-bus paths and interfaces of interest over the
// websocket. Either/both of them can be an empty array. The arrays
// need to be sent in a JSON dictionary.
// Client will be notified of events occurring on these paths and/or
// interfaces.
var data = JSON.stringify(
{
"paths": ["/xyz/openbmc_project/logging",
"/xyz/openbmc_project/sensors"],
"interfaces": ["xyz.openbmc_project.Logging.Entry",
"xyz.openbmc_project.Sensor.Value"]
});
ws.onopen = function() {
// Send the JSON dictionary
ws.send(data);
};
ws.onmessage = function (evt) {
// Received a message on the websocket, the response is a JSON dict.
var response = JSON.parse(evt.data);
for (var key in response) {
if (response.hasOwnProperty(key)) {
var value = response[key];
if ("path" == key) {
// If the d-bus path is in the response, let's do a GET on
// that path.
var xhr = new XMLHttpRequest();
xhr.withCredentials = true;
var url = "https://<BMC IP>" + value;
xhr.open("GET", url, true);
xhr.setRequestHeader("Content-type", "application/json");
xhr.send();
}
}
}
};
</script>
</head>
</html>
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