<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="UTF-8">
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<title>pending</title>
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</head>
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<body style="background-color: #585858;">
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<script>
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const PORT = new URL(document.location.href).searchParams.get("port");
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// ===== DhPostMessageDll In-Process Ping-Pong (kein localhost-Webserver noetig) =====
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// Antwort von C++ kommt hier an (erwartet "pong:ping").
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window.dhOnMessage = function (msg) {
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if (msg == "pong:ping");
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document.title = "#success#CefSharp.PostMessage.Ping#";
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};
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function dhSendPing() {
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try {
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if (window.CefSharp && window.CefSharp.PostMessage) {
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CefSharp.PostMessage("ping");
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} else {
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document.title = "#failure#CefSharp.PostMessage nicht verfuegbar#";
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}
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} catch (e) {
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document.title = "#failure#CefSharp.PostMessage " + e.message + "#";
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}
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}
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window.addEventListener("load", dhSendPing);
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function pingTestLocal(callback) {
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try {
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var xhr = new XMLHttpRequest();
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xhr.open("GET", "http://127.0.0.1:" + PORT + "/api/ping", true);
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xhr.timeout = 5000;
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var called = false;
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function done(result) {
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if (!called) {
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called = true;
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callback(result);
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}
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}
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xhr.ontimeout = function () {
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done({ status: 0, statusText: "timeout" });
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};
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xhr.onreadystatechange = function () {
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if (xhr.readyState === 4) {
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if (xhr.responseText === "ping") {
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callback({ status: xhr.status, statusText: "ok" });
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} else {
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callback({ status: xhr.status, statusText: xhr.statusText });
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}
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}
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};
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xhr.send(null);
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} catch (err) {
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callback({ status: 0, statusText: err.message });
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}
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}
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function pingWithRetry(attemptsLeft, delays, callback) {
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pingTestLocal(function (result) {
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if (result.status === 200 || attemptsLeft <= 1) {
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callback(result, delays.length - attemptsLeft + 1);
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} else {
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var delay = delays[delays.length - attemptsLeft + 1] || 5000;
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setTimeout(function () {
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pingWithRetry(attemptsLeft - 1, delays, callback);
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}, delay);
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}
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});
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}
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function onPingResult(result, attempts) {
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if(result.status === 200) {
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document.title = "#success#" + attempts + "#";
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} else {
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document.title = "#failure#" + result.status + "#" + result.statusText + "#";
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}
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}
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function closeWindow() {
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document.title = "#close#";
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}
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setTimeout(function () {
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pingWithRetry(3, [0, 2000, 5000], onPingResult);
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setTimeout(function () {
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closeWindow();
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}, 15000);
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}, 30000);
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</script>
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</body>
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</html>
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