查找10000.gradio.app到30000.gradio.app之间可访问的网址

<script>
	const result = document.getElementById("result");
	for(let i=10000; i<=30000; i++){
		const url = `http://${i}.gradio.app`;
		fetch(url, {method: 'HEAD'})
		.then(res => {
			if(res.ok){
				const li = document.createElement("li");
				const text = document.createTextNode(`可访问：${url}`);
				li.appendChild(text);
				result.appendChild(li);
			}
		})
		.catch(err => console.log(err));
	}
</script>