[BUG] bigint overflow

Describe the bug

Routing can not be return bigint value correctly

To Reproduce

1. Create a file with:

from fastapi import FastAPI

app = FastAPI()


@app.get("/{test_id}")
def read_root(test_id: int):
    return test_id

1. Open the browser and call the endpoint /1249958025205260288.
2. It returns 1249958025205260300 .
3. But I expected it to return 1249958025205260288.

Environment

• OS: macOS & Linux
• FastAPI Version : 0.52.0
• Python Version: 3.7.2 & 3.7.4

[Dustyposa]

I think this problem caused by js, not python,even fasapi. In js: You console.log(1249958025205260288), you can see it consoled :

1249958025205260300

Not 1249958025205260288.

[tiangolo]

Thanks for the help here everyone! 👏 🙇

Thanks for reporting back and closing the issue @tanyaofei 👍