Add a live preview pane to Gateway Defaults for the themed page and Custom HTML (v0.11.91)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "site-gateway",
-  "version": "0.11.78",
+  "version": "0.11.91",
   "private": true,
   "description": "Site Gateway: simple self-hosted website publishing, reverse proxying, and automatic HTTPS.",
   "type": "module",

src/public/app.js

@@ -1,5 +1,5 @@
 const $ = selector => document.querySelector(selector);
-const state = { sites: [], proxies: [], redirects: [], streams: [], accessLists: [], groups: [], backups: [], settings: null, dashboard: null, certificates: null, readiness: null, logs: null, users: [], user: null, config: null, view: "overview", loaded: false, pendingDelete: null, pendingReplace: null, editing: null, iconTarget: null, passwordTarget: null, healthTimer: null };
+const state = { sites: [], proxies: [], redirects: [], streams: [], accessLists: [], groups: [], backups: [], settings: null, dashboard: null, certificates: null, readiness: null, logs: null, users: [], user: null, config: null, view: "overview", loaded: false, pendingDelete: null, pendingReplace: null, editing: null, iconTarget: null, passwordTarget: null, healthTimer: null, updateCheckTimer: null, loadedVersion: null, updateAvailable: false };
 document.querySelector("#create-form [name=domain]")?.closest("label")?.childNodes[0] && (document.querySelector("#create-form [name=domain]").closest("label").childNodes[0].textContent = "Primary domain ");
 if (!document.querySelector("#create-form [name=accessListId]")) { const anchor = document.querySelector("#create-form [name=tls]")?.closest("label"); if (anchor) { const label = document.createElement("label"); label.innerHTML = '<span>Access List <span class="optional">Optional</span></span><select name="accessListId"><option value="">Public — no Access List</option></select><small>Protect this hosted site and all of its domains.</small>'; anchor.before(label); } }
 if (!document.querySelector("#settings-access-list")) { const anchor = document.querySelector("#settings-form [name=domain]")?.closest("label"); if (anchor) { const label = document.createElement("label"); label.innerHTML = '<span>Access List <span class="optional">Optional</span></span><select id="settings-access-list" name="accessListId"><option value="">Public — no Access List</option></select><small>Protect this route and all of its domains.</small>'; anchor.after(label); } }
@@ -24,7 +24,7 @@ async function api(url, options = {}) {
   if (!response.ok) { const body = await response.json().catch(() => ({})); throw new Error(body.error || "Request failed."); }
   return response.status === 204 ? null : response.json();
 }
-function showLogin(message = "") { state.user = null; state.users = []; state.view = "overview"; const form = $("#login-form"); form.reset(); form.elements.username.value = ""; form.elements.password.value = ""; $("#login").classList.remove("hidden"); $("#dashboard").classList.add("hidden"); $("#login-error").textContent = message; $("#mfa-login-form").reset(); $("#mfa-login-form").classList.add("hidden"); $("#login-form").classList.remove("hidden"); $("#mfa-login-error").textContent = ""; }
+function showLogin(message = "") { state.user = null; state.users = []; state.view = "overview"; const form = $("#login-form"); form.reset(); form.elements.username.value = ""; form.elements.password.value = ""; $("#login").classList.remove("hidden"); $("#dashboard").classList.add("hidden"); $("#login-error").textContent = message; $("#mfa-login-form").reset(); $("#mfa-login-form").classList.add("hidden"); $("#login-form").classList.remove("hidden"); $("#mfa-login-error").textContent = ""; setTimeout(() => form.elements.username.focus(), 0); }
 function showDashboard() { $("#login").classList.add("hidden"); $("#dashboard").classList.remove("hidden"); }
 function toast(message) { const el = $("#toast"); el.textContent = message; el.classList.add("show"); setTimeout(() => el.classList.remove("show"), 2800); }
 function escapeHtml(value) { const el = document.createElement("div"); el.textContent = value ?? ""; return el.innerHTML; }
@@ -83,7 +83,7 @@ function advancedFormBody(form, body, scoped) {
   body.accessListId = read("accessListId", body.accessListId || "");
   body.requestHeaders = parseHeaderLines(read("requestHeadersText")); body.responseHeaders = parseHeaderLines(read("responseHeadersText")); body.compression = read("compression", "automatic"); body.customConfig = read("customConfig");
   body.locations = String(form.get("customLocationsText") || "").split("\n").map(line => { const [path, target, behavior] = line.split("|").map(value => value.trim()); return path && target ? { path, target, stripPrefix:behavior.toLowerCase() === "strip" } : null; }).filter(Boolean);
-  body.upstreams = String(form.get("upstreamsText") || "").split("\n").map(value => value.trim()).filter(Boolean);
+  body.upstreams = String(form.get("upstreamsText") || "").split("\n").map(value => value.trim()).filter(Boolean); body.lbPolicy = read("lbPolicy", "random");
   body.healthPath = read("healthPath", "/"); body.healthMethod = read("healthMethod", "GET"); body.healthExpected = read("healthExpected", "200-499"); body.healthTimeoutSeconds = Number(read("healthTimeoutSeconds", "4")); body.healthRetries = Number(read("healthRetries", "0"));
   delete body.requestHeadersText; delete body.responseHeadersText; delete body.customLocationsText;
   return body;
@@ -410,14 +410,23 @@ async function boot() {
   if (session.setupRequired) { $("#login").classList.add("hidden"); $("#dashboard").classList.add("hidden"); $("#setup-form [name=username]").value = session.user.username; if (!$("#setup-dialog").open) $("#setup-dialog").showModal(); return; }
   state.view = location.hash.slice(1) || "overview"; state.users = []; showDashboard(); state.user = session.user; $("#user-label").textContent = session.user?.displayName || session.username; document.querySelectorAll(".admin-only").forEach(element => element.classList.toggle("hidden", !canAdmin())); render(); state.config = await api("/api/config");
   $("#version-label").textContent = `v${state.config.version || "unknown"}`;
+  if (!state.loadedVersion) state.loadedVersion = state.config.version;
   $("#port-range").textContent = `${state.config.minPort}–${state.config.maxPort}`; $("#port-help").textContent = `Direct LAN access range: ${state.config.minPort}–${state.config.maxPort}`;
   $("#create-form [name=port]").min = state.config.minPort; $("#create-form [name=port]").max = state.config.maxPort; await refresh(); if (state.view !== "overview") await loadFeatureView();
   if (!state.healthTimer) state.healthTimer = setInterval(() => { if (state.view === "overview" && !$("#dashboard").classList.contains("hidden")) refreshDashboard().catch(error => toast(error.message)); }, 30000);
+  if (!state.updateCheckTimer) state.updateCheckTimer = setInterval(() => { if (!$("#dashboard").classList.contains("hidden")) checkForUpdate().catch(() => {}); }, 60000);
 }
+async function checkForUpdate() {
+  if (state.updateAvailable || !state.loadedVersion) return;
+  const config = await api("/api/config");
+  if (config.version && config.version !== state.loadedVersion) { state.updateAvailable = true; $("#update-banner").classList.remove("hidden"); }
+}
+$("#update-banner-refresh").addEventListener("click", () => location.reload());
+$("#update-banner-dismiss").addEventListener("click", () => { $("#update-banner").classList.add("hidden"); state.updateAvailable = false; });
 
-$("#login-form").addEventListener("submit", async event => { event.preventDefault(); $("#login-error").textContent = ""; try { const result = await api("/api/login", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify(Object.fromEntries(new FormData(event.target))) }); if (result?.mfaRequired) { $("#login-form").classList.add("hidden"); $("#mfa-login-form").classList.remove("hidden"); $("#mfa-login-form [name=code]").focus(); return; } event.target.reset(); await boot(); } catch (error) { $("#login-error").textContent = error.message; } });
-$("#mfa-login-form").addEventListener("submit", async event => { event.preventDefault(); $("#mfa-login-error").textContent = ""; try { const response = await fetch("/api/login/mfa", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify(Object.fromEntries(new FormData(event.target))) }); const body = await response.json().catch(() => ({})); if (!response.ok) throw new Error(body.error || "That code didn't match. Try again."); event.target.reset(); await boot(); } catch (error) { $("#mfa-login-error").textContent = error.message; } });
-$("#mfa-login-cancel").addEventListener("click", () => { $("#mfa-login-form").reset(); $("#mfa-login-error").textContent = ""; $("#mfa-login-form").classList.add("hidden"); $("#login-form").classList.remove("hidden"); });
+$("#login-form").addEventListener("submit", async event => { event.preventDefault(); $("#login-error").textContent = ""; try { const result = await api("/api/login", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify(Object.fromEntries(new FormData(event.target))) }); if (result?.mfaRequired) { $("#login-form").classList.add("hidden"); $("#mfa-login-form").classList.remove("hidden"); $("#mfa-login-form [name=code]").focus(); return; } event.target.reset(); history.replaceState(null, "", `${location.pathname}${location.search}`); await boot(); } catch (error) { $("#login-error").textContent = error.message; } });
+$("#mfa-login-form").addEventListener("submit", async event => { event.preventDefault(); $("#mfa-login-error").textContent = ""; try { const response = await fetch("/api/login/mfa", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify(Object.fromEntries(new FormData(event.target))) }); const body = await response.json().catch(() => ({})); if (!response.ok) throw new Error(body.error || "That code didn't match. Try again."); event.target.reset(); history.replaceState(null, "", `${location.pathname}${location.search}`); await boot(); } catch (error) { $("#mfa-login-error").textContent = error.message; } });
+$("#mfa-login-cancel").addEventListener("click", () => { $("#mfa-login-form").reset(); $("#mfa-login-error").textContent = ""; $("#mfa-login-form").classList.add("hidden"); $("#login-form").classList.remove("hidden"); $("#login-form").elements.password.value = ""; setTimeout(() => $("#login-form").elements.password.focus(), 0); });
 $("#setup-form").addEventListener("submit", async event => { event.preventDefault(); $("#setup-error").textContent = ""; try { await api("/api/setup/admin", { method: "POST", headers: { "Content-Type": "application/json" }, body: JSON.stringify(Object.fromEntries(new FormData(event.target))) }); $("#setup-dialog").close(); event.target.reset(); await boot(); showLogin("Administrator account saved. Sign in with your finalized credentials."); } catch (error) { $("#setup-error").textContent = error.message; } });
 $("#setup-dialog").addEventListener("cancel", event => event.preventDefault());
 $("#logout").addEventListener("click", async () => { await fetch("/api/logout", { method: "POST" }); showLogin(); });
@@ -439,8 +448,8 @@ function openCreate() {
   if (state.view === "streaming") { $("#stream-form").reset(); delete $("#stream-form").dataset.editing; $("#stream-title").textContent = "Create a streaming host"; $("#stream-form .button.primary").textContent = "Create streaming host"; $("#stream-error").textContent = ""; return $("#stream-dialog").showModal(); }
   if (state.view === "redirects") { $("#redirect-form").reset(); delete $("#redirect-form").dataset.editing; $("#redirect-error").textContent = ""; return $("#redirect-dialog").showModal(); }
   if (state.view === "access") { $("#access-form").reset(); delete $("#access-form").dataset.editing; $("#access-error").textContent = ""; $("#access-form .access-create-guidance")?.remove(); const assignmentSummary = $("#access-assignment-summary"); assignmentSummary?.classList.add("hidden"); if (assignmentSummary) assignmentSummary.innerHTML = ""; window.renderCredentialEditor?.([]); return $("#access-dialog").showModal(); }
-  if (state.view === "proxies") { $("#proxy-form").reset(); $("#custom-certificate-fields").classList.remove("custom-certificate-visible"); $("#proxy-error").textContent = ""; return $("#proxy-dialog").showModal(); }
-  $("#create-form").reset(); $("#create-error").textContent = ""; const used = new Set(state.sites.map(site => site.port)); let port = state.config.minPort; while (used.has(port)) port++; $("#create-form [name=port]").value = port; $("#create-dialog").showModal();
+  if (state.view === "proxies") { $("#proxy-form").reset(); $("#proxy-form").querySelectorAll("details").forEach(details => details.open = false); $("#custom-certificate-fields").classList.remove("custom-certificate-visible"); $("#proxy-error").textContent = ""; return $("#proxy-dialog").showModal(); }
+  $("#create-form").reset(); $("#create-form").querySelectorAll("details").forEach(details => details.open = false); $("#create-error").textContent = ""; const used = new Set(state.sites.map(site => site.port)); let port = state.config.minPort; while (used.has(port)) port++; $("#create-form [name=port]").value = port; $("#create-dialog").showModal();
 }
 $("#open-create").addEventListener("click", openCreate);
 document.addEventListener("click", event => { if (event.target.closest(".create-trigger")) openCreate(); if (event.target.closest(".close-dialog")) event.target.closest("dialog").close(); if (!event.target.closest(".menu-wrap")) closeMenus(); });
@@ -454,7 +463,7 @@ function ensureHostedHealthFields() { [document.querySelector("#create-form deta
 setInterval(ensureHostedHealthFields, 300);
 function openSettings(kind, id) {
   if (kind === "hosted") kind = "site";
-  const item = (kind === "proxy" ? state.proxies : state.sites).find(value => value.id === id); if (!item) return; state.editing = { kind, id }; const form = $("#settings-form"); form.reset();
+  const item = (kind === "proxy" ? state.proxies : state.sites).find(value => value.id === id); if (!item) return; state.editing = { kind, id }; const form = $("#settings-form"); form.reset(); form.querySelectorAll("details").forEach(details => details.open = false);
   $("#settings-title").textContent = kind === "proxy" ? "Edit proxy host" : "Domain & TLS"; $("#settings-name-wrap").classList.toggle("hidden", kind !== "proxy"); $("#settings-target-wrap").classList.toggle("hidden", kind !== "proxy"); $("#settings-advanced").classList.toggle("hidden", kind !== "proxy"); $("#settings-hosted-advanced").classList.toggle("hidden", kind !== "site");
   form.elements.name.value = item.name || ""; form.elements.domain.value = item.domain || ""; form.elements.target.value = item.target || ""; form.elements.tls.value = item.tls || "automatic"; form.elements.hsts.checked = Boolean(item.hsts); if (form.elements.settingsAccessListId) form.elements.settingsAccessListId.value = item.accessListId || "";
   if (kind === "proxy") {
@@ -462,7 +471,7 @@ function openSettings(kind, id) {
     setScoped(form, scope, "accessListId", item.accessListId || ""); setScoped(form, scope, "healthPath", item.healthPath || "/"); setScoped(form, scope, "healthMethod", item.healthMethod || "GET"); setScoped(form, scope, "healthExpected", item.healthExpected || "200-499"); setScoped(form, scope, "healthTimeoutSeconds", item.healthTimeoutSeconds || 4); setScoped(form, scope, "healthEnabled", item.healthEnabled !== false); setScoped(form, scope, "compression", item.compression || "automatic"); setScoped(form, scope, "blockCommonExploits", Boolean(item.blockCommonExploits));
     form.elements.customLocationsText.value = (item.locations || []).map(location => `${location.path} | ${location.target} | ${location.stripPrefix ? "strip" : "preserve"}`).join("\n");
     setScoped(form, scope, "requestHeadersText", (item.requestHeaders || []).map(header => `${header.name}: ${header.value}`).join("\n")); setScoped(form, scope, "responseHeadersText", (item.responseHeaders || []).map(header => `${header.name}: ${header.value}`).join("\n"));
-    form.elements.upstreamTlsServerName.value = item.upstreamTlsServerName || ""; setScoped(form, scope, "upstreamTlsInsecure", Boolean(item.upstreamTlsInsecure)); setScoped(form, scope, "hstsSubdomains", Boolean(item.hstsSubdomains)); setScoped(form, scope, "customConfig", item.customConfig || "");
+    form.elements.upstreamTlsServerName.value = item.upstreamTlsServerName || ""; setScoped(form, scope, "upstreamTlsInsecure", Boolean(item.upstreamTlsInsecure)); setScoped(form, scope, "hstsSubdomains", Boolean(item.hstsSubdomains)); setScoped(form, scope, "customConfig", item.customConfig || ""); form.elements.upstreamsText.value = (item.upstreams || []).join("\n"); setScoped(form, scope, "lbPolicy", item.lbPolicy || "random");
   }
   if (kind === "site") {
     const scope = "#settings-hosted-advanced";
@@ -589,6 +598,9 @@ function syncUpstreamTlsControls(form) {
   if (tlsSkip && !https) tlsSkip.checked = false;
   const help = tlsSkip?.closest("label")?.querySelector("small");
   if (help) help.textContent = https ? "Use only for a trusted internal HTTPS service with a self-signed or hostname-mismatched certificate." : "Available only when the upstream uses HTTPS.";
+
+  const lbPolicy = form.elements.lbPolicy;
+  if (lbPolicy) { const poolTargets = String(form.elements.upstreamsText?.value || "").split("\n").map(value => value.trim()).filter(Boolean); const multi = poolTargets.length > 1; lbPolicy.disabled = !multi; lbPolicy.closest("label")?.classList.toggle("control-disabled", !multi); if (!multi) lbPolicy.value = "random"; }
 }
 document.addEventListener("input", event => { if (event.target.matches('#proxy-form [name="target"],#proxy-form [name="upstreamsText"],#settings-form [name="target"],#settings-form [name="upstreamsText"]')) syncUpstreamTlsControls(event.target.form); });
 document.addEventListener("change", event => { if (event.target.matches('#proxy-form [name="target"],#proxy-form [name="upstreamsText"],#settings-form [name="target"],#settings-form [name="upstreamsText"]')) syncUpstreamTlsControls(event.target.form); });

src/public/features.js

@@ -47,8 +47,34 @@ function renderDefaultSettings() {
   if (!document.querySelector("#default-site-help")) { const help = document.createElement("p"); help.id = "default-site-help"; help.className = "muted"; help.textContent = "The Default Site handles unknown HTTP hostnames. HTTPS requests still require a matching host and certificate."; form.prepend(help); }
   for (const key of ["mode","title","message","redirectUrl","redirectCode","customHtml"]) if (form.elements[key] && value[key] !== undefined) form.elements[key].value = value[key];
   form.elements.preservePath.checked = value.preservePath !== false;
+  renderDefaultSitePreview();
 }
 
+// Keep this HTML template in sync with the themed-page literal inside renderDefaultSiteHtml()
+// in src/server.js -- duplicated here so the live preview below renders instantly, without a
+// round trip to the server, on every keystroke. If the server template ever changes, this must
+// be updated to match or the preview will silently drift from what visitors actually see.
+function defaultSiteThemedHtml(title, message) {
+  const safeTitle = extendedEscape(title);
+  const safeMessage = extendedEscape(message);
+  return `<!doctype html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1"><meta name="color-scheme" content="dark light"><title>${safeTitle}</title><style>:root{color-scheme:dark light;--bg:#08101d;--card:#101a2b;--line:#25344c;--text:#eef4ff;--muted:#95a4ba;--green:#62e6a7}*{box-sizing:border-box}body{margin:0;min-height:100vh;display:grid;place-items:center;padding:24px;background:radial-gradient(circle at 50% 0,#163829 0,transparent 42%),var(--bg);color:var(--text);font-family:Inter,system-ui,sans-serif}.card{width:min(620px,100%);padding:44px;border:1px solid var(--line);border-radius:22px;background:color-mix(in srgb,var(--card) 94%,transparent);box-shadow:0 28px 80px #0006}.mark{width:54px;height:54px;border-radius:15px;display:grid;place-items:center;background:#17352a;color:var(--green);font-weight:900}.eyebrow{margin:28px 0 10px;color:var(--green);font-size:12px;font-weight:800;letter-spacing:.14em;text-transform:uppercase}h1{margin:0;font-size:clamp(34px,7vw,56px);letter-spacing:-.05em;line-height:1.02}p{color:var(--muted);font-size:17px;line-height:1.65;margin:20px 0 0}.foot{padding-top:28px;margin-top:30px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}@media(prefers-color-scheme:light){:root{--bg:#f3f6fa;--card:#fff;--line:#d6dfeb;--text:#132033;--muted:#637188;--green:#138a5b}}</style></head><body><main class="card"><div class="mark">SG</div><div class="eyebrow">Site Gateway</div><h1>${safeTitle}</h1><p>${safeMessage}</p><div class="foot">Host. Proxy. Secure.</div></main></body></html>`;
+}
+
+function renderDefaultSitePreview() {
+  const form = document.querySelector("#default-site-form"), frame = document.querySelector("#default-site-preview-frame"), note = document.querySelector("#default-site-preview-note");
+  if (!form || !frame || !note) return;
+  const mode = form.elements.mode.value;
+  if (mode === "abort") { frame.closest(".default-site-preview-frame-wrap").classList.add("hidden"); note.classList.remove("hidden"); note.textContent = "No page is shown for this mode \u2014 the connection is closed immediately."; return; }
+  if (mode === "redirect") { frame.closest(".default-site-preview-frame-wrap").classList.add("hidden"); note.classList.remove("hidden"); const destination = form.elements.redirectUrl.value.trim(); note.textContent = destination ? `No page is shown for this mode \u2014 visitors are redirected to ${destination}.` : "No page is shown for this mode \u2014 enter a redirect destination above."; return; }
+  frame.closest(".default-site-preview-frame-wrap").classList.remove("hidden"); note.classList.add("hidden");
+  if (mode === "custom") { frame.srcdoc = form.elements.customHtml.value || "<p style=\"font:14px sans-serif;color:#95a4ba;padding:20px\">Enter Custom HTML above to preview it here.</p>"; return; }
+  const title = form.elements.title.value || (mode === "welcome" ? "Gateway ready" : "Route not found");
+  const message = form.elements.message.value || "The gateway is responding, but this address has not been configured.";
+  frame.srcdoc = defaultSiteThemedHtml(title, message);
+}
+document.querySelector("#default-site-form")?.addEventListener("input", renderDefaultSitePreview);
+document.querySelector("#default-site-form")?.addEventListener("change", renderDefaultSitePreview);
+
 function renderHealthSettings() {
   if (!state.settings) return; const form = document.querySelector("#health-settings-form"), value = state.settings.certificateHealth || {};
   for (const key of ["warningDays","criticalDays","staleMinutes"]) if (value[key] !== undefined) form.elements[key].value = value[key];
@@ -98,7 +124,7 @@ document.querySelector("#redirect-list").addEventListener("click", async event =
   try { if (button.dataset.redirectAction === "edit") { const form = document.querySelector("#redirect-form"); form.reset(); form.dataset.editing = item.id; for (const key of ["name","domain","target","code","tls"]) form.elements[key].value = item[key] || ""; form.elements.preservePath.checked = item.preservePath !== false; document.querySelector("#redirect-dialog").showModal(); return; } if (button.dataset.redirectAction === "delete") { if (!confirm(`Delete redirect “${item.name}”?`)) return; await api(`/api/redirects/${item.id}`, { method:"DELETE" }); } else await api(`/api/redirects/${item.id}`, { method:"PATCH", headers:{"Content-Type":"application/json"}, body:JSON.stringify({ enabled:!item.enabled }) }); await refresh(); toast("Redirect Host updated."); } catch (error) { toast(error.message); }
 });
 
-function themedAccessDialog(title, copy, confirmLabel = "Delete", danger = false) { let dialog = document.querySelector("#access-action-dialog"); if (!dialog) { dialog = document.createElement("dialog"); dialog.id = "access-action-dialog"; document.body.append(dialog); } dialog.innerHTML = `<form method="dialog" class="dialog-card compact"><div class="dialog-heading"><div><p class="eyebrow">Access Lists</p><h2>${extendedEscape(title)}</h2></div></div><p class="muted">${copy}</p><div class="dialog-actions"><button value="cancel" class="button secondary">Cancel</button>${confirmLabel ? `<button value="confirm" class="button ${danger ? "danger" : "primary"}">${extendedEscape(confirmLabel)}</button>` : ""}</div></form>`; dialog.showModal(); return new Promise(resolve => dialog.addEventListener("close", () => resolve(dialog.returnValue === "confirm"), { once:true })); }
+function themedAccessDialog(title, copy, confirmLabel = "Delete", danger = false, eyebrow = "Access Lists") { let dialog = document.querySelector("#access-action-dialog"); if (!dialog) { dialog = document.createElement("dialog"); dialog.id = "access-action-dialog"; document.body.append(dialog); } dialog.innerHTML = `<form method="dialog" class="dialog-card compact"><div class="dialog-heading"><div><p class="eyebrow">${extendedEscape(eyebrow)}</p><h2>${extendedEscape(title)}</h2></div></div><p class="muted">${copy}</p><div class="dialog-actions"><button value="cancel" class="button secondary">Cancel</button>${confirmLabel ? `<button value="confirm" class="button ${danger ? "danger" : "primary"}">${extendedEscape(confirmLabel)}</button>` : ""}</div></form>`; dialog.showModal(); return new Promise(resolve => dialog.addEventListener("close", () => resolve(dialog.returnValue === "confirm"), { once:true })); }
 document.querySelector("#access-list").addEventListener("click", async event => {
   if (event.target.closest(".menu-button")) { const card = event.target.closest("[data-access-id]"); const opening = !card.classList.contains("menu-open"); document.querySelectorAll("#access-list .menu-open").forEach(item => item.classList.remove("menu-open")); card.classList.toggle("menu-open", opening); card.querySelector(".menu-button")?.setAttribute("aria-expanded", String(opening)); return; }
   const button = event.target.closest("[data-access-action]"), row = button?.closest("[data-access-id]"); if (!button || !row) return; const item = state.accessLists.find(value => value.id === row.dataset.accessId); if (!item) return;
@@ -143,7 +169,7 @@ function renderGroups() { const tabs = document.querySelector(".admin-tabs"); co
 function openGroupEditor(group) { let dialog = document.querySelector("#group-dialog"); if (!dialog) { dialog = document.createElement("dialog"); dialog.id = "group-dialog"; document.body.append(dialog); } dialog.innerHTML = '<form class="dialog-card group-editor"><div class="dialog-heading"><div><p class="eyebrow">Administration</p><h2>Edit group</h2></div><button type="button" class="icon-button close-group-dialog">×</button></div><label>Group name<input name="name" required maxlength="80"></label><label>Members <span class="optional">Optional</span></label><p class="muted">Select Site Gateway users who should belong to this group.</p><div class="group-member-options">' + (state.users || []).filter(user => user.status !== "disabled").map(user => '<label class="check-control"><input type="checkbox" name="members" value="' + user.id + '"><span>' + extendedEscape(user.username) + ' <small>' + extendedEscape(user.role || "Standard User") + '</small></span></label>').join("") + '</div><p class="error" data-group-error></p><div class="dialog-actions"><button type="button" class="button secondary close-group-dialog">Cancel</button><button class="button primary">Save group</button></div></form>'; dialog.querySelector('[name="name"]').value = group.name; dialog.querySelectorAll('[name="members"]').forEach(input => { input.checked = (group.memberIds || group.members || []).includes(input.value) || (group.members || []).some(value => value === state.users?.find(user => user.id === input.value)?.username); }); dialog.querySelectorAll(".close-group-dialog").forEach(button => button.addEventListener("click", () => dialog.close())); dialog.querySelector("form").addEventListener("submit", async event => { event.preventDefault(); const form = new FormData(event.target); try { await api("/api/groups/" + group.id, { method:"PATCH", headers:{"Content-Type":"application/json"}, body:JSON.stringify({ name:form.get("name"), members:[...event.target.querySelectorAll('[name="members"]:checked')].map(input => input.value) }) }); dialog.close(); await refresh(); toast("Group updated."); } catch (error) { dialog.querySelector("[data-group-error]").textContent = error.message; } }); dialog.showModal(); }
 document.addEventListener("click", event => { const button = event.target.closest('[data-admin-panel="groups"] .group-card .menu-button'); if (!button) return; const card = button.closest(".group-card"); const opening = !card.classList.contains("menu-open"); document.querySelectorAll('[data-admin-panel="groups"] .group-card.menu-open').forEach(item => { item.classList.remove("menu-open"); item.querySelector(".menu-button")?.setAttribute("aria-expanded", "false"); }); card.classList.toggle("menu-open", opening); button.setAttribute("aria-expanded", String(opening)); event.preventDefault(); event.stopImmediatePropagation(); }, true);
 function openNewGroupEditor() { let dialog = document.querySelector("#group-dialog"); if (!dialog) { dialog = document.createElement("dialog"); dialog.id = "group-dialog"; document.body.append(dialog); } dialog.innerHTML = '<form class="dialog-card group-editor"><div class="dialog-heading"><div><p class="eyebrow">Administration</p><h2>Create group</h2></div><button type="button" class="icon-button close-group-dialog">×</button></div><label>Group name<input name="name" required maxlength="80" placeholder="Home users"></label><label>Members <span class="optional">Optional</span></label><p class="muted">Select Site Gateway users who should belong to this group.</p><div class="group-member-options">' + (state.users || []).filter(user => user.status !== "disabled").map(user => '<label class="check-control"><input type="checkbox" name="members" value="' + user.id + '"><span>' + extendedEscape(user.username) + ' <small>' + extendedEscape(user.role || "Standard User") + '</small></span></label>').join("") + '</div><p class="error" data-group-error></p><div class="dialog-actions"><button type="button" class="button secondary close-group-dialog">Cancel</button><button class="button primary">Create group</button></div></form>'; dialog.querySelectorAll(".close-group-dialog").forEach(button => button.addEventListener("click", () => dialog.close())); dialog.querySelector("form").addEventListener("submit", async event => { event.preventDefault(); const form = new FormData(event.target); try { await api("/api/groups", { method:"POST", headers:{"Content-Type":"application/json"}, body:JSON.stringify({ name:String(form.get("name") || "").trim(), members:[...event.target.querySelectorAll('[name="members"]:checked')].map(input => input.value) }) }); dialog.close(); await refresh(); toast("Group created."); } catch (error) { dialog.querySelector("[data-group-error]").textContent = error.message; } }); dialog.showModal(); }
-document.addEventListener("click", async event => { if (event.target.id === "create-group") { openNewGroupEditor(); return; } const button = event.target.closest("[data-group-action]"); if (!button) return; const id = button.dataset.groupId; const group = state.groups.find(value => value.id === id); if (button.dataset.groupAction === "edit") { if (group) openGroupEditor(group); return; } if (button.dataset.groupAction === "icon") return; if (button.dataset.groupAction === "delete" && !confirm("Delete this group?")) return; const isToggle = button.dataset.groupAction === "toggle", wasOn = button.classList.contains("on"); if (isToggle) { button.classList.toggle("on", !wasOn); button.disabled = true; } try { if (button.dataset.groupAction === "delete") await api("/api/groups/" + id, { method:"DELETE" }); else await api("/api/groups/" + id, { method:"PATCH", headers:{"Content-Type":"application/json"}, body:JSON.stringify({ enabled: isToggle ? !wasOn : button.textContent.trim() === "Enable" }) }); await refresh(); toast("Group updated."); } catch (error) { if (isToggle) { button.classList.toggle("on", wasOn); button.disabled = false; } toast(error.message); } });
+document.addEventListener("click", async event => { if (event.target.id === "create-group") { openNewGroupEditor(); return; } const button = event.target.closest("[data-group-action]"); if (!button) return; const id = button.dataset.groupId; const group = state.groups.find(value => value.id === id); if (button.dataset.groupAction === "edit") { if (group) openGroupEditor(group); return; } if (button.dataset.groupAction === "icon") return; if (button.dataset.groupAction === "delete" && !confirm("Delete this group?")) return; const isToggle = button.dataset.groupAction === "toggle", wasOn = button.classList.contains("on"); if (isToggle && wasOn) { const assignedLists = (state.accessLists || []).filter(list => (list.groups || []).includes(id) && list.enabled !== false); if (assignedLists.length) { const names = assignedLists.map(list => extendedEscape(list.name)).join(", "); if (!(await themedAccessDialog("Disable group?", `Disabling “${extendedEscape(group?.name || "this group")}” will immediately stop its members from signing in through: ${names}. Continue?`, "Disable", true, "Groups"))) return; } } if (isToggle) { button.classList.toggle("on", !wasOn); button.disabled = true; } try { if (button.dataset.groupAction === "delete") await api("/api/groups/" + id, { method:"DELETE" }); else await api("/api/groups/" + id, { method:"PATCH", headers:{"Content-Type":"application/json"}, body:JSON.stringify({ enabled: isToggle ? !wasOn : button.textContent.trim() === "Enable" }) }); await refresh(); toast("Group updated."); } catch (error) { if (isToggle) { button.classList.toggle("on", wasOn); button.disabled = false; } toast(error.message); } });
 function renderAccessGroupSelector(accessListId) { const summary = document.querySelector("#access-assignment-summary"); if (!summary || !state.groups) return; let field = summary.querySelector(".access-group-selector"); if (!field) { field = document.createElement("section"); field.className = "access-group-selector"; summary.prepend(field); } const selected = state.accessLists.find(item => item.id === accessListId)?.groups || []; field.innerHTML = "<strong>Allowed groups <span class=\"optional\">Optional</span></strong><p class=\"access-group-help\">Members of enabled groups can sign in with their Site Gateway credentials.</p>" + (state.groups.length ? "<div class=\"access-group-options\">" + state.groups.map(group => "<label class=\"check-control access-group-option\"><input type=\"checkbox\" data-group-option=\"" + group.id + "\"" + (selected.includes(group.id) ? " checked" : "") + "><span>" + extendedEscape(group.name) + " <small>" + (group.members?.length || 0) + " members" + (group.enabled === false ? " · Disabled" : "") + "</small></span></label>").join("") + "</div>" : "<p class=\"access-group-empty\">No groups have been created yet.</p>"); }
 document.addEventListener("change", async event => { const option = event.target.closest("[data-group-option]"); if (!option) return; const accessListId = document.querySelector("#access-form")?.dataset.editing; if (!accessListId) return; const groups = [...document.querySelectorAll("#access-assignment-summary [data-group-option]:checked")].map(input => input.dataset.groupOption); try { await api("/api/access-lists/" + accessListId + "/groups", { method:"POST", headers:{"Content-Type":"application/json"}, body:JSON.stringify({ groups }) }); const item = state.accessLists.find(value => value.id === accessListId); if (item) item.groups = groups; renderAccessLists(); decorateAccessGroups(); toast("Access List groups saved."); } catch (error) { option.checked = !option.checked; toast(error.message); } }, true);
 document.addEventListener("click", event => { const button = event.target.closest("#access-list [data-access-action=toggle]"); if (button) event.stopImmediatePropagation(); });

src/server.js

@@ -290,6 +290,7 @@ function applyAdvancedSettings(item, body) {
     if (!Array.isArray(body.upstreams) || body.upstreams.length > 10) throw Object.assign(new Error("Add up to 10 upstream targets."), { status: 400 });
     item.upstreams = body.upstreams.map(validateTarget);
   }
+  if (body.lbPolicy !== undefined) item.lbPolicy = ["random", "round_robin", "least_conn", "ip_hash"].includes(body.lbPolicy) ? body.lbPolicy : "random";
   if (body.accessListId !== undefined) item.accessListId = String(body.accessListId || "");
   if (body.compression !== undefined) item.compression = ["off", "gzip", "automatic"].includes(body.compression) ? body.compression : "automatic";
   if (body.hstsSubdomains !== undefined) item.hstsSubdomains = Boolean(body.hstsSubdomains);
@@ -327,7 +328,12 @@ function caddySiteAddress(item) {
 }
 
 function caddyQuote(value) {
-  return `"${String(value).replaceAll("\\", "\\\\").replaceAll('"', '\\"').replaceAll("\n", " ")}"`;
+  // Caddy's Caddyfile lexer only special-cases \" inside a quoted string — it does NOT
+  // collapse \\ into a single backslash (confirmed in caddyconfig/caddyfile/lexer.go: "all is
+  // literal in quoted area, so only escape quotes"). Doubling backslashes here, as this used to,
+  // corrupts any value that legitimately contains one (e.g. a regex like eval\( becomes eval\\(,
+  // which Caddy then reads as an escaped backslash followed by an unclosed real group).
+  return `"${String(value).replaceAll('"', '\\"').replaceAll("\n", " ")}"`;
 }
 
 function accessDirectives(accessListId) {
@@ -368,6 +374,7 @@ function commonHostDirectives(item) {
 function proxyBlock(target, item, indent = "  ") {
   const targets = Array.isArray(item.upstreams) && item.upstreams.length ? item.upstreams : [target];
   const output = [`${indent}reverse_proxy ${targets.join(" ")} {`];
+  if (targets.length > 1) { const policy = ["round_robin", "least_conn", "ip_hash"].includes(item.lbPolicy) ? item.lbPolicy : "random"; output.push(`${indent}  lb_policy ${policy}`); }
   const timeout = Math.min(Math.max(Number(item.healthTimeoutSeconds) || 4, 1), 60);
   const httpsUpstream = targets.length > 0 && targets.every(value => /^https:\/\//i.test(String(value).trim()));
   if (httpsUpstream && (item.upstreamTlsServerName || item.upstreamTlsInsecure)) output.push(`${indent}  transport http {`, ...(item.upstreamTlsServerName ? [`${indent}    tls_server_name ${item.upstreamTlsServerName}`] : []), ...(item.upstreamTlsInsecure ? [`${indent}    tls_insecure_skip_verify`] : []), `${indent}    response_header_timeout ${timeout}s`, `${indent}  }`);