1  from fastapi import FastAPI, Query
 2  from fastapi.responses import JSONResponse
 3  import random
 4  import asyncio
 5  
 6  app = FastAPI()
 7  
 8  @app.get("/mock-endpoint")
 9  async def mock_endpoint(
10      min_time: int = Query(..., description="Minimum sleep time in ms"),
11      max_time: int = Query(..., description="Maximum sleep time in ms"),
12      failchance: int = Query(..., ge=0, le=100, description="Chance of failure (0-100)")
13  ):
14      if min_time > max_time:
15          return JSONResponse(status_code=400, content={"error": "min_time must be <= max_time"})
16      sleep_ms = random.randint(min_time, max_time)
17      await asyncio.sleep(sleep_ms / 1000)
18      if random.randint(1, 100) <= failchance:
19          return JSONResponse(status_code=504, content={"error": "Simulated failure"})
20      return {"status": "ok", "slept_ms": sleep_ms}