使用Nodejs获取bing每日图片

/** 
 * @description 获取必应图片
 * @param {Number} req.body.w 宽度
 * @param {Number} req.body.h 高度
 * @param {Number} req.body.size 图片大小
 * @returns {BinaryData} 图片二进制
 */

mkdir bing && cd bing && pnpm init
pnpm add express

# 安装node-fetch为我们做请求
pnpm add node-fetch

# 还需要安装一下sharp对我们的图片进行处理
pnpm add sharp

// app.js

import 'dotenv/config';
import express from "express"
import cors from "cors"
import imagesRouter from './src/router/images.js'

const app = express();
app.use(cors());

app.use("/images", imagesRouter);

app.get("/", (req, res) => { 
  res.send("Hello World");
})

app.listen(process.env.RUN_TIME_PORT, () => { 
  console.log(`Server running on port ${process.env.RUN_TIME_PORT}`);
})

// 请求
    const base = "https://www.bing.com";
    const reqUrl = base + '/HPImageArchive.aspx?format=js&idx=0&n=9&pid=hp&FORM=BEHPTB&uhd=1&uhdwidth=3840&uhdheight=2160&setmkt=%s&setlang=en';
    const data = await fetch(reqUrl)
    const json = await data.json()

// 请求
    const base = "https://www.bing.com";
    const reqUrl = base + '/HPImageArchive.aspx?format=js&idx=0&n=9&pid=hp&FORM=BEHPTB&uhd=1&uhdwidth=3840&uhdheight=2160&setmkt=%s&setlang=en';
    const data = await fetch(reqUrl)
    const json = await data.json()

export async function downloadImage(src = '',name='bing.jpg') {
  const response = await fetch(src);
  const buffer = await response.buffer();
  fs.writeFileSync(BING_PATH(name), buffer)
}

export function bingIsExist() { 
  const today = dayjs().format("YYYY-MM-DD");
  const data = fs.readdirSync(BASE_PUBLIC_DIR + '/bing')
  const isExist = some(data, v => v.startsWith(`${today}`))
  return isExist
}

/**
 * 下载bing图片
 * 1. 判断今天的图片是否已经下载过了
 * 2. 如果没有下载过，那么就下载
 * 3. 如果下载过了，就直接返回本地文件
 * @returns {BinaryData} 图片二进制
 */
export async function useBing() {
  const canFind = bingIsExist()
  const toDay = dayjs().format("YYYY-MM-DD");
  if (!canFind) {
    const base = "https://www.bing.com";
    const reqUrl = base + '/HPImageArchive.aspx?format=js&idx=0&n=9&pid=hp&FORM=BEHPTB&uhd=1&uhdwidth=3840&uhdheight=2160&setmkt=%s&setlang=en';
    const data = await fetch(reqUrl)
    const json = await data.json()
    const url = json.images[0].url
    const realURL = base + url
    await downloadImage(realURL, toDay + ".jpg")
  }
  const data = fs.readFileSync(BING_PATH(toDay + ".jpg"))
  return data
}

router.get("/bing", async (req, res) => {
  const { w, h, size } = req.query // 需要使用body-paser哦
  const blob = await useBing()
  res.setHeader("Content-Type", "image/jpeg")
  // 中间使用sharp处理图片。就不多赘述，自行编写～很简单
  ...
  res.send(blob)
})