Fix web apps failing to start with FastAPI 0.145+ and prepare 1.0.5

CHANGELOG.md

@@ -1,3 +1,9 @@
+## 1.0.5
+
+### Bug fixes
+
+* Fix `flet run --web` and other Flet web apps failing to start with FastAPI 0.145 or later, which removed the `openapi_prefix` argument ([#6984](https://github.com/flet-dev/flet/issues/6984), [#6988](https://github.com/flet-dev/flet/pull/6988)) by @FeodorFitsner.
+
 ## 1.0.4
 
 ### Improvements

client/pubspec.lock

@@ -359,7 +359,7 @@ packages:
       path: "../packages/flet"
       relative: true
     source: path
-    version: "1.0.4"
+    version: "1.0.5"
   flet_ads:
     dependency: "direct main"
     description:

packages/flet/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 1.0.5
+
+_No changes in the `flet` Dart package; version bumped for release coordination with the fix for Flet web apps failing to start with FastAPI 0.145 or later ([#6984](https://github.com/flet-dev/flet/issues/6984), [#6988](https://github.com/flet-dev/flet/pull/6988))._
+
 ## 1.0.4
 
 * Depend on `screen_brightness_platform_interface`, `screen_brightness_android` and `screen_brightness_ios` instead of `screen_brightness`, and drive `ScreenBrightnessService` through `ScreenBrightnessPlatform.instance`: apps embedding `flet` no longer register the Windows, macOS and OHOS `screen_brightness` plugins, whose Windows one talks to monitors over DDC/CI while the app runs ([#6629](https://github.com/flet-dev/flet/issues/6629), [#6493](https://github.com/flet-dev/flet/issues/6493), [#6925](https://github.com/flet-dev/flet/pull/6925)) by @ndonkoHenri.

packages/flet/pubspec.yaml

@@ -2,7 +2,7 @@ name: flet
 description: Write entire Flutter app in Python or add server-driven UI experience into existing Flutter app.
 homepage: https://flet.dev
 repository: https://github.com/flet-dev/flet/tree/main/packages/flet
-version: 1.0.4
+version: 1.0.5
 
 # Supported platforms
 platforms:

sdk/python/packages/flet-web/src/flet_web/fastapi/flet_fastapi.py

@@ -15,6 +15,8 @@
 
 import flet_web.fastapi
 
+_DEFAULT_RESPONSE_CLASS = Default(JSONResponse)
+
 
 class FastAPI(fastapi.FastAPI):
     """
@@ -38,7 +40,7 @@ def __init__(
         openapi_tags: Optional[list[dict[str, Any]]] = None,
         servers: Optional[list[dict[str, Union[str, Any]]]] = None,
         dependencies: Optional[Sequence[Depends]] = None,
-        default_response_class: type[Response] = Default(JSONResponse),
+        default_response_class: type[Response] = _DEFAULT_RESPONSE_CLASS,
         redirect_slashes: bool = True,
         docs_url: Optional[str] = "/docs",
         redoc_url: Optional[str] = "/redoc",
@@ -139,8 +141,7 @@ async def lifespan(app: fastapi.FastAPI):
             terms_of_service=terms_of_service,
             contact=contact,
             license_info=license_info,
-            openapi_prefix=openapi_prefix,
-            root_path=root_path,
+            root_path=root_path or openapi_prefix,
             root_path_in_servers=root_path_in_servers,
             responses=responses,
             callbacks=callbacks,

sdk/python/packages/flet-web/tests/test_fastapi.py

@@ -0,0 +1,35 @@
+import pytest
+from fastapi.testclient import TestClient
+
+from flet_web.fastapi import FastAPI
+
+
+@pytest.mark.parametrize(
+    ("kwargs", "expected_root_path"),
+    [
+        ({}, ""),
+        ({"root_path": "/app"}, "/app"),
+        ({"openapi_prefix": "/legacy"}, "/legacy"),
+        ({"openapi_prefix": "/legacy", "root_path": "/app"}, "/app"),
+    ],
+)
+def test_fastapi_root_path_and_lifecycle(kwargs, expected_root_path):
+    """`root_path` falls back to `openapi_prefix`, and lifecycle hooks run once."""
+    events = []
+    app = FastAPI(
+        **kwargs,
+        on_startup=[lambda: events.append("startup")],
+        on_shutdown=[lambda: events.append("shutdown")],
+    )
+
+    @app.get("/path")
+    def get_root_path():
+        return {"root_path": app.root_path}
+
+    with TestClient(app) as client:
+        assert events == ["startup"]
+        response = client.get("/path")
+        assert response.status_code == 200
+        assert response.json() == {"root_path": expected_root_path}
+
+    assert events == ["startup", "shutdown"]