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function runKvmdSession() {
var ws = new WebSocket("ws://" + location.host + "/kvmd/ws");
ws.onopen = function(event) {
__installHidHandlers(ws);
__setSessionStatus("session-opened", "Session opened (keyboard captured)");
};
ws.onmessage = function(event) {
// console.log("KVMD:", event.data);
event = JSON.parse(event.data);
if (event.msg_type == "event") {
if (event.msg.event == "atx_state") {
leds = event.msg.event_attrs.leds;
document.getElementById("power-led").className = "power-led-" + (leds.power ? "on" : "off");
document.getElementById("hdd-led").className = "hdd-led-" + (leds.hdd ? "on" : "off");
}
}
};
ws.onclose = function(event) {
__clearHidHandlers();
__setSessionStatus("session-closed", "Session closed (keyboard free), trying to reconnect...");
document.getElementById("power-led").className = "power-led-off";
document.getElementById("hdd-led").className = "hdd-led-off";
setTimeout(runKvmdSession, 5000);
};
ws.onerror = function(error) {
ws.close();
};
}
function __setSessionStatus(cls, msg) {
var el_session_status = document.getElementById("session-status");
el_session_status.innerHTML = msg;
el_session_status.className = cls;
}
function __installHidHandlers(ws) {
// https://www.codeday.top/2017/05/03/24906.html
document.onkeydown = (event) => __onKeyEvent(ws, event, true);
document.onkeyup = (event) => __onKeyEvent(ws, event, false);
el_stream_image = document.getElementById("stream-image");
el_stream_image.onmousedown = (event) => __onMouseButton(ws, event, true);
el_stream_image.onmouseup = (event) => __onMouseButton(ws, event, false);
el_stream_image.oncontextmenu = (event) => event.preventDefault();
el_stream_image.onmousemove = __onMouseMove;
el_stream_image.onwheel = (event) => __onMouseWheel(ws, event);
runKvmdSession.mouse_move_timer = setInterval(() => __handleMouseMove(ws), 100);
}
function __clearHidHandlers() {
document.onkeydown = null;
document.onkeyup = null;
el_stream_image = document.getElementById("stream-image");
el_stream_image.onmousedown = null;
el_stream_image.onmouseup = null;
el_stream_image.oncontextmenu = null;
el_stream_image.onmousemove = null;
el_stream_image.onwheel = null;
clearInterval(runKvmdSession.mouse_move_timer);
}
function __onKeyEvent(ws, event, state) {
// console.log("KVMD: Key", (state ? "pressed:" : "released:"), event)
if (!event.metaKey) { // https://github.com/wesbos/keycodes/blob/gh-pages/scripts.js
event.preventDefault();
}
ws.send(JSON.stringify({
event_type: "key",
key: event.code,
state: state,
}));
}
function __onMouseButton(ws, event, state) {
// https://www.w3schools.com/jsref/event_button.asp
switch (event.button) {
case 0: var button = "Left"; break;
case 2: var button = "Right"; break;
default: var button = null; break
}
if (button) {
// console.log("KVMD: Mouse button", (state ? "pressed:" : "released:"), button);
event.preventDefault();
__handleMouseMove(ws);
ws.send(JSON.stringify({
event_type: "mouse_button",
button: button,
state: state,
}));
}
}
function __onMouseMove(event) {
var rect = event.target.getBoundingClientRect();
__onMouseMove.pos = {
x: Math.round(event.clientX - rect.left),
y: Math.round(event.clientY - rect.top),
};
}
__onMouseMove.pos = {x: 0, y:0};
function __handleMouseMove(ws) {
var pos = __onMouseMove.pos;
if (pos.x != __handleMouseMove.old_pos.x || pos.y != __handleMouseMove.old_pos.y) {
ws.send(JSON.stringify({
event_type: "mouse_move",
to: pos,
}));
__handleMouseMove.old_pos = pos;
}
}
__handleMouseMove.old_pos = {x: 0, y:0};
function __onMouseWheel(ws, event) {
// https://learn.javascript.ru/mousewheel
if (event.preventDefault) {
event.preventDefault();
}
ws.send(JSON.stringify({
event_type: "mouse_wheel",
delta: {
x: event.deltaX,
y: event.deltaY,
},
}));
}
// -----------------------------------------------------------------------------
function clickPowerButton() {
if (confirm("Are you sure to click the power button?")) {
__clickButton("power");
}
}
function clickPowerButtonLong() {
if (confirm("Are you sure to perform the long press of the power button?")) {
__clickButton("power_long");
}
}
function clickResetButton() {
if (confirm("Are you sure to reboot the server?")) {
__clickButton("reset");
}
}
function __clickButton(button) {
var http = new XMLHttpRequest();
http.open("POST", "/kvmd/atx/click?button=" + button, true);
http.onreadystatechange = function() {
if (http.readyState == 4 && http.status != 200) {
alert("Click error: " + http.responseText);
}
}
http.send();
}
// -----------------------------------------------------------------------------
function pollStreamer() {
var http = new XMLHttpRequest();
http.open("GET", "/streamer/?action=snapshot", true);
http.onreadystatechange = function() {
if (http.readyState == 2) {
var status = http.status;
http.abort();
if (status != 200) {
console.log("Refreshing streamer ...");
pollStreamer.last = false;
} else if (!pollStreamer.last) {
__refreshStremaer();
pollStreamer.last = true;
}
}
}
http.send();
setTimeout(pollStreamer, 2000);
}
pollStreamer.last = false;
function __refreshStremaer() {
var http = new XMLHttpRequest();
http.open("GET", "/kvmd/streamer", true);
http.onreadystatechange = function() {
if (http.readyState == 4 && http.status == 200) {
size = JSON.parse(http.responseText).result.size;
el_stream_box = document.getElementById("stream-image");
el_stream_box.style.width = size.width + "px";
el_stream_box.style.height = size.height + "px";
document.getElementById("stream-image").src = "/streamer/?action=stream&time=" + new Date().getTime();
}
}
http.send();
}
function resetStreamer() {
var http = new XMLHttpRequest();
http.open("POST", "/kvmd/streamer/reset", true);
http.onreadystatechange = function() {
if (http.readyState == 4 && http.status != 200) {
alert("Can't reset streamer: " + http.responseText);
}
}
http.send();
}
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