Add base-path deployment support

server.js

@@ -3,6 +3,7 @@ import { readFile } from "node:fs/promises";
 import { extname } from "node:path";
 
 const PORT = Number(process.env.PORT || 5173);
+const BASE_PATH = normalizeBasePath(process.env.DOCLINK_BASE_PATH || "");
 const API_BASE =
   process.env.DOCLINK_API_BASE ||
   "https://devbandungraya.aplikasi.web.id/one-api-doctor/doctor_mitra";
@@ -23,6 +24,36 @@ function escapeHtml(value) {
     .replaceAll('"', """);
 }
 
+function normalizeBasePath(value) {
+  const raw = String(value || "").trim();
+  if (!raw || raw === "/") return "";
+  const withLeadingSlash = raw.startsWith("/") ? raw : `/${raw}`;
+  return withLeadingSlash.replace(/\/+$/, "");
+}
+
+function appPath(pathname = "/") {
+  const text = String(pathname || "/");
+  if (/^https?:\/\//i.test(text) || text.startsWith("//")) return text;
+  if (!BASE_PATH) return text.startsWith("/") ? text : `/${text}`;
+  if (text === BASE_PATH || text.startsWith(`${BASE_PATH}/`)) return text;
+  if (text === "/" || text === "") return BASE_PATH;
+  if (text.startsWith("/")) return `${BASE_PATH}${text}`;
+  return `${BASE_PATH}/${text}`;
+}
+
+function stripBasePath(pathname) {
+  const path = String(pathname || "/");
+  if (!BASE_PATH) return path || "/";
+  if (path === BASE_PATH) return "/";
+  if (path.startsWith(`${BASE_PATH}/`)) return path.slice(BASE_PATH.length) || "/";
+  return path;
+}
+
+function rewriteHtmlPaths(html) {
+  if (!BASE_PATH || typeof html !== "string") return html;
+  return html.replace(/\b(href|src|action|hx-get|hx-post)="\/(?!\/)/g, `$1="${BASE_PATH}/`);
+}
+
 function statusClass(status) {
   const mapping = {
     Processing: "warning",
@@ -1998,13 +2029,15 @@ function json(res, status, payload) {
 }
 
 function redirect(res, location, headers = {}) {
-  res.writeHead(302, { Location: location, ...headers });
+  const resolvedLocation = typeof location === "string" && location.startsWith("/") ? appPath(location) : location;
+  res.writeHead(302, { Location: resolvedLocation, ...headers });
   res.end();
 }
 
 function html(res, status, body, headers = {}) {
+  const output = rewriteHtmlPaths(body);
   res.writeHead(status, { "Content-Type": "text/html; charset=utf-8", ...headers });
-  res.end(body);
+  res.end(output);
 }
 
 function isHtmx(req) {
@@ -2204,7 +2237,7 @@ async function fragmentResultDetail(session, resultId) {
 }
 
 async function renderRoute(req, res, url) {
-  const path = url.pathname;
+  const path = stripBasePath(url.pathname);
   const query = Object.fromEntries(url.searchParams.entries());
   const session = readSession(req);
   const authed = Boolean(session);
@@ -2572,7 +2605,7 @@ async function renderRoute(req, res, url) {
     return;
   }
 
-  html(res, 404, emptyRoute(path));
+  html(res, 404, emptyRoute(url.pathname));
 }
 
 const server = http.createServer(async (req, res) => {