cesium_three_nodejs/router_handler/tiles/cloud.js

const fs = require('fs');
const path = require('path');
const basieTilesPath = "G:/";

//获取气象层级
exports.getCloud = async (req, res) => {
    const { z, x, y } = req.params;

    const path = `${basieTilesPath}tiles/cloud/${z}/${x}/${y}`;

    // 查找存在的瓦片文件
    let foundTile = `${path}.png`;

    if (foundTile) {
        // 设置缓存头
        res.setHeader('Cache-Control', 'public, max-age=604800'); // 缓存一周
        res.setHeader('Expires', new Date(Date.now() + 604800000).toUTCString());

        // 发送文件
        res.sendFile(foundTile);
    } else {
        res.status(404).send('Tile not found');
    }
}