app.py

from fastapi import FastAPI, Request
from fastapi.responses import JSONResponse
import sys
import io
import traceback

app = FastAPI()

@app.post("/execute")
async def execute_code(request: Request):
    data = await request.json()
    code = data.get("code", "")
    output = io.StringIO()
    sys_stdout = sys.stdout
    sys.stderr = sys.stderr
    sys.stdout = output
    sys.stderr = output
    try:
        exec(code, {})
        result = output.getvalue()
    except Exception:
        result = output.getvalue() + "\n" + traceback.format_exc()
    finally:
        sys.stdout = sys_stdout
        sys.stderr = sys.stderr
    return JSONResponse({"result": resul