feat: init fastopenapi (#30453)

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

api/extensions/ext_fastopenapi.py

@@ -0,0 +1,43 @@
+from fastopenapi.routers import FlaskRouter
+from flask_cors import CORS
+
+from configs import dify_config
+from controllers.fastopenapi import console_router
+from dify_app import DifyApp
+from extensions.ext_blueprints import AUTHENTICATED_HEADERS, EXPOSED_HEADERS
+
+DOCS_PREFIX = "/fastopenapi"
+
+
+def init_app(app: DifyApp) -> None:
+    docs_enabled = dify_config.SWAGGER_UI_ENABLED
+    docs_url = f"{DOCS_PREFIX}/docs" if docs_enabled else None
+    redoc_url = f"{DOCS_PREFIX}/redoc" if docs_enabled else None
+    openapi_url = f"{DOCS_PREFIX}/openapi.json" if docs_enabled else None
+
+    router = FlaskRouter(
+        app=app,
+        docs_url=docs_url,
+        redoc_url=redoc_url,
+        openapi_url=openapi_url,
+        openapi_version="3.0.0",
+        title="Dify API (FastOpenAPI PoC)",
+        version="1.0",
+        description="FastOpenAPI proof of concept for Dify API",
+    )
+
+    # Ensure route decorators are evaluated.
+    import controllers.console.ping as ping_module
+
+    _ = ping_module
+
+    router.include_router(console_router, prefix="/console/api")
+    CORS(
+        app,
+        resources={r"/console/api/*": {"origins": dify_config.CONSOLE_CORS_ALLOW_ORIGINS}},
+        supports_credentials=True,
+        allow_headers=list(AUTHENTICATED_HEADERS),
+        methods=["GET", "PUT", "POST", "DELETE", "OPTIONS", "PATCH"],
+        expose_headers=list(EXPOSED_HEADERS),
+    )
+    app.extensions["fastopenapi"] = router