FastAPI mount and endpoints

[RRozi]

Question

When you go to the root, a message is processed
HTMLResponse(content=html_content, status_code=200)
html
fetch('/get_data', {
method: 'POST',
headers: {
'Content-Type': 'application/json'
}.......

As a result, it goes to get_data where I already receive data (from html tg api) but I also need my application to display it to me app.mount('/', flet_fastapi.app(root_main))
But I don't understand how to do this. Either the application opens for me, but the data is not displayed, or vice versa. I need to receive the data and display the application to which I will ultimately transfer this data, I might have understood what it was before, but I didn’t work much with the fast api

Code sample

app = FastAPI()


async def root_main(page: ft.Page):
    page.add(ft.Text("This is root app!"))


@app.get("/")
async def read_root():
    with open("index_data.html", "r") as file:
        html_content = file.read()

    return HTMLResponse(content=html_content, status_code=200)


@app.post("/get_data")
async def send_name(request: Request):
    data = await request.json()
    # 


if __name__ == "__main__":
    import uvicorn
    app.mount('/', flet_fastapi.app(root_main))
    uvicorn.run(app, host="0.0.0.0", port=25022)

Error message

No response

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• I have searched for answers to my question both in the issues and in previous discussions.