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/*****************************************************************************
# #
# KVMD - The main Pi-KVM daemon. #
# #
# Copyright (C) 2018 Maxim Devaev <[email protected]> #
# #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
# the Free Software Foundation, either version 3 of the License, or #
# (at your option) any later version. #
# #
# This program is distributed in the hope that it will be useful, #
# but WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
# GNU General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License #
# along with this program. If not, see <https://www.gnu.org/licenses/>. #
# #
*****************************************************************************/
function Session() {
// var self = this;
/************************************************************************/
var __ws = null;
var __ping_timer = null;
var __missed_heartbeats = 0;
var __hid = new Hid();
var __atx = new Atx();
var __msd = new Msd();
var __streamer = new Streamer();
var __init__ = function() {
__startSession();
};
/************************************************************************/
var __setKvmdInfo = function(state) {
if (state.meta) {
let text = JSON.stringify(state.meta, undefined, 4).replace(/ /g, " ").replace(/\n/g, "<br>");
$("about-meta").innerHTML = `
<span class="code-comment">// The Pi-KVM metadata.<br>
// You can get this json using handle <a target="_blank" href="/kvmd/info">/kvmd/info</a>.<br>
// In the standard configuration this data<br>
// is specified in the file /etc/kvmd/meta.yaml.</span><br>
<br>
${text}
`;
if (state.meta.server && state.meta.server.host) {
$("kvmd-meta-server-host").innerHTML = "Server: " + state.meta.server.host;
document.title = "Pi-KVM Session: " + state.meta.server.host;
} else {
$("kvmd-meta-server-host").innerHTML = "";
document.title = "Pi-KVM Session";
}
}
$("about-version-kvmd").innerHTML = state.version.kvmd;
$("about-version-streamer").innerHTML = `${state.version.streamer} (${state.streamer})`;
};
var __startSession = function() {
$("link-led").className = "led-yellow";
$("link-led").title = "Connecting...";
let http = tools.makeRequest("GET", "/kvmd/auth/check", function() {
if (http.readyState === 4) {
if (http.status === 200) {
let proto = (location.protocol === "https:" ? "wss" : "ws");
__ws = new WebSocket(`${proto}://${location.host}/kvmd/ws`);
__ws.onopen = __wsOpenHandler;
__ws.onmessage = __wsMessageHandler;
__ws.onerror = __wsErrorHandler;
__ws.onclose = __wsCloseHandler;
} else if (http.status === 401 || http.status === 403) {
wm.error("Unexpected logout occured, please login again").then(function() {
document.location.href = "/login";
});
} else {
__wsCloseHandler(null);
}
}
});
};
var __wsOpenHandler = function(event) {
tools.debug("Session: socket opened:", event);
$("link-led").className = "led-green";
$("link-led").title = "Connected";
__hid.setSocket(__ws);
__missed_heartbeats = 0;
__ping_timer = setInterval(__pingServer, 1000);
};
var __wsMessageHandler = function(event) {
// tools.debug("Session: received socket data:", event.data);
event = JSON.parse(event.data);
if (event.msg_type === "pong") {
__missed_heartbeats = 0;
} else if (event.msg_type === "event") {
if (event.msg.event === "info_state") {
__setKvmdInfo(event.msg.event_attrs);
} else if (event.msg.event === "hid_state") {
__hid.setState(event.msg.event_attrs);
} else if (event.msg.event === "atx_state") {
__atx.setState(event.msg.event_attrs);
} else if (event.msg.event === "msd_state") {
__msd.setState(event.msg.event_attrs);
} else if (event.msg.event === "streamer_state") {
__streamer.setState(event.msg.event_attrs);
}
}
};
var __wsErrorHandler = function(event) {
tools.error("Session: socket error:", event);
if (__ws) {
__ws.onclose = null;
__ws.close();
__wsCloseHandler(null);
}
};
var __wsCloseHandler = function(event) {
tools.debug("Session: socket closed:", event);
$("link-led").className = "led-gray";
if (__ping_timer) {
clearInterval(__ping_timer);
__ping_timer = null;
}
__hid.setSocket(null);
__atx.setState(null);
__msd.setState(null);
__streamer.setState(null);
__ws = null;
setTimeout(function() {
$("link-led").className = "led-yellow";
setTimeout(__startSession, 500);
}, 500);
};
var __pingServer = function() {
try {
__missed_heartbeats += 1;
if (__missed_heartbeats >= 5) {
throw new Error("Too many missed heartbeats");
}
__ws.send(JSON.stringify({"event_type": "ping"}));
} catch (err) {
tools.error("Session: ping error:", err.message);
if (__ws) {
__ws.onclose = null;
__ws.close();
__wsCloseHandler(null);
}
}
};
__init__();
}
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