var request; var interval = 1000; var webSocketFactory = { connect: function(url) { var ws = new WebSocket(url); ws.addEventListener("open", e => { ws.close(); document.location.reload(); }); ws.addEventListener("error", e => { if (e.target.readyState === 3) { setTimeout(() => this.connect(url), 1000); } }); } }; function getInfo() { var url = "msg.html"; try { if (window.XMLHttpRequest) { request = new XMLHttpRequest(); } else { throw "XMLHttpRequest not available!"; } request.onreadystatechange = processInfo; request.open("GET", url, true); request.send(); } catch (e) { var err = "Error: " + e.message; console.log(err); setError(err); } } function processInfo() { try { if (request.readyState != 4) { return true; } var msg = request.responseText; if (msg == null || msg.length == 0) { setError("Lost connection"); schedule(); return false; } var notFound = (request.status == 404); if (request.status == 200) { if (msg.toLowerCase().indexOf("") !== -1) { notFound = true; } else { setInfo(msg); schedule(); return true; } } if (notFound) { setInfo("Connecting to VNC", true); var protocol = window.location.protocol === "https:" ? "wss:" : "ws:"; var path = window.location.pathname.replace(/[^/]*$/, '').replace(/\/$/, ''); var wsUrl = protocol + "//" + window.location.host + path + "/websockify"; var webSocket = webSocketFactory.connect(wsUrl); return true; } setError("Error: Received statuscode " + request.status); schedule(); return false; } catch (e) { var err = "Error: " + e.message; console.log(err); setError(err); return false; } } function setInfo(msg, loading, error) { try { if (msg == null || msg.length == 0) { return false; } var el = document.getElementById("spinner"); error = !!error; if (!error) { el.style.visibility = 'visible'; } else { el.style.visibility = 'hidden'; } loading = !!loading; if (loading) { msg = "

" + msg + "

"; } el = document.getElementById("info"); if (el.innerHTML != msg) { el.innerHTML = msg; } return true; } catch (e) { console.log("Error: " + e.message); return false; } } function setError(text) { return setInfo(text, false, true); } function schedule() { setTimeout(getInfo, interval); } schedule();