refactor: replace stripDashboardAppPrefix with mapAppProxyPath to correctly preserve application base paths

health-server.js

@@ -58,14 +58,13 @@ function isLocalRoute(pathname) {
   );
 }
 
-function stripDashboardAppPrefix(path) {
-  if (path === DASHBOARD_APP_BASE) return "/";
+function mapAppProxyPath(path) {
+  if (path === DASHBOARD_APP_BASE) return APP_BASE;
   if (path.startsWith(`${DASHBOARD_APP_BASE}/`)) {
-    return path.slice(DASHBOARD_APP_BASE.length) || "/";
+    return `${APP_BASE}${path.slice(DASHBOARD_APP_BASE.length)}`;
   }
-  if (path === APP_BASE) return "/";
-  if (path.startsWith(`${APP_BASE}/`)) {
-    return path.slice(APP_BASE.length) || "/";
+  if (path === APP_BASE || path.startsWith(`${APP_BASE}/`)) {
+    return path;
   }
   return path;
 }
@@ -1019,7 +1018,7 @@ const server = http.createServer((req, res) => {
 
   if (isDashboardAppRoute(pathname) || isAppRoute(pathname)) {
     const proxyPath =
-      stripDashboardAppPrefix(pathname) + (parsedUrl.search || "");
+      mapAppProxyPath(pathname) + (parsedUrl.search || "");
     proxyHttp(req, res, proxyPath, GATEWAY_PORT);
     return;
   }
@@ -1037,7 +1036,7 @@ server.on("upgrade", (req, socket, head) => {
   if (isDashboardAppRoute(pathname) || isAppRoute(pathname)) {
     const parsedUrl = parseRequestUrl(req.url || "/");
     const proxyPath =
-      stripDashboardAppPrefix(pathname) + (parsedUrl.search || "");
+      mapAppProxyPath(pathname) + (parsedUrl.search || "");
     proxyUpgrade(req, socket, head, proxyPath, GATEWAY_PORT);
     return;
   }