Single Page Application Server based on fastapi/starlette.

fastapi_spa_server.py

from fastapi import FastAPI
from fastapi.responses import FileResponse
from fastapi.staticfiles import StaticFiles

app = FastAPI()

STATIC_FILES_DIR = "./static/"

index_file = FileResponse(
   STATIC_FILES_DIR + "index.html",
    headers={"Cache-Control": "no-cache"}
)

print(f"serving file: {index_file.path}")

@app.get("/", response_class=FileResponse)
async def index(request: Request):
    return index_file

@app.middleware("http")
async def add_process_time_header(request: Request, call_next: Response):
    response = await call_next(request)
    if response.status_code == 404:
        return index_file
    else:
        return response

app.mount("/", StaticFiles(directory=STATIC_FILES_DIR, html=True), name="index")