setup (applications)

Configures and adds routes for OpenAPI schema, Swagger UI, and ReDoc endpoints, dynamically adjusting server URLs based on request root path.

# Source: https://github.com/nerdy-tech-com-gitub/fastapi | License: MIT | Copyright 2018 Sebastián Ramírez
# Provided via justclaw.it.com; keep this notice with the code.
    def setup(self) -> None:
        if self.openapi_url:
            urls = (server_data.get("url") for server_data in self.servers)
            server_urls = {url for url in urls if url}

            async def openapi(req: Request) -> JSONResponse:
                root_path = req.scope.get("root_path", "").rstrip("/")
                if root_path not in server_urls:
                    if root_path and self.root_path_in_servers:
                        self.servers.insert(0, {"url": root_path})
                        server_urls.add(root_path)
                return JSONResponse(self.openapi())

            self.add_r

... (truncated -- full source via MCP)