From bd02bbb88ae52f01e9a3fb76cfb3a80f1b6cc3ba Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 18 Feb 2026 22:45:30 +0000
Subject: [PATCH 1/3] Initial plan


From aa8231eca5bf2f52a44610b38ca48f75a8c5167a Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 18 Feb 2026 22:49:36 +0000
Subject: [PATCH 2/3] Fix SPA routing for multiuser mode by handling 404s in
 NoCacheStaticFiles

Co-authored-by: lstein <111189+lstein@users.noreply.github.com>
---
 invokeai/app/api/no_cache_staticfiles.py | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/invokeai/app/api/no_cache_staticfiles.py b/invokeai/app/api/no_cache_staticfiles.py
index 15a53270f1d..7d25faba65e 100644
--- a/invokeai/app/api/no_cache_staticfiles.py
+++ b/invokeai/app/api/no_cache_staticfiles.py
@@ -1,5 +1,6 @@
 from typing import Any
 
+from starlette.exceptions import HTTPException
 from starlette.responses import Response
 from starlette.staticfiles import StaticFiles
 
@@ -12,6 +13,10 @@ class NoCacheStaticFiles(StaticFiles):
 
     Static files include the javascript bundles, fonts, locales, and some images. Generated
     images are not included, as they are served by a router.
+    
+    This class also implements proper SPA (Single Page Application) routing by serving index.html
+    for any routes that don't match static files, enabling client-side routing to work correctly
+    in production builds.
     """
 
     def __init__(self, *args: Any, **kwargs: Any):
@@ -26,3 +31,19 @@ def file_response(self, *args: Any, **kwargs: Any) -> Response:
         resp.headers.setdefault("Pragma", self.pragma)
         resp.headers.setdefault("Expires", self.expires)
         return resp
+
+    async def get_response(self, path: str, scope: Any) -> Response:
+        """
+        Override get_response to implement SPA routing.
+        
+        When a file is not found and html mode is enabled, serve index.html instead of raising a 404.
+        This allows client-side routing to work correctly in SPAs.
+        """
+        try:
+            return await super().get_response(path, scope)
+        except HTTPException as exc:
+            # If the file is not found (404) and html mode is enabled, serve index.html
+            # This allows client-side routing to handle the path
+            if exc.status_code == 404 and self.html:
+                return await super().get_response("index.html", scope)
+            raise

From 040dffc3ba9f87812651d354c08f18150bccf38b Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 18 Feb 2026 22:50:06 +0000
Subject: [PATCH 3/3] Improve type hint for scope parameter to use Scope type
 from starlette.types

Co-authored-by: lstein <111189+lstein@users.noreply.github.com>
---
 invokeai/app/api/no_cache_staticfiles.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/invokeai/app/api/no_cache_staticfiles.py b/invokeai/app/api/no_cache_staticfiles.py
index 7d25faba65e..6b3b172ba07 100644
--- a/invokeai/app/api/no_cache_staticfiles.py
+++ b/invokeai/app/api/no_cache_staticfiles.py
@@ -3,6 +3,7 @@
 from starlette.exceptions import HTTPException
 from starlette.responses import Response
 from starlette.staticfiles import StaticFiles
+from starlette.types import Scope
 
 
 class NoCacheStaticFiles(StaticFiles):
@@ -32,7 +33,7 @@ def file_response(self, *args: Any, **kwargs: Any) -> Response:
         resp.headers.setdefault("Expires", self.expires)
         return resp
 
-    async def get_response(self, path: str, scope: Any) -> Response:
+    async def get_response(self, path: str, scope: Scope) -> Response:
         """
         Override get_response to implement SPA routing.