starlette/docs/staticfiles.md

As well as the FileResponse class, Starlette also includes ASGI applications for serving a specific file or directory:

• StaticFile(path) - Serve a single file, given by path.
• StaticFiles(directory) - Serve any files in the given directory.

You can combine these ASGI applications with Starlette's routing to provide comprehensive static file serving.

from starlette.routing import Router, Path, PathPrefix
from starlette.staticfiles import StaticFile, StaticFiles


app = Router(routes=[
    Path('/', app=StaticFile(path='index.html')),
    PathPrefix('/static', app=StaticFiles(directory='static')),
])

Static files will respond with "404 Not found" or "405 Method not allowed" responses for requests which do not match.