1. 技术栈

后端采用nodejs + koa web框架进行开发

2. 开发接口统计

2.1 获取图片的宽高

npm install image-size

const axios = require("axios");
const sizeOf = require("image-size");

const imageInfo = function(imageUrl){
    return new Promise(async (resolve, reject) => {
        try {
            const res = await axios.get(imageUrl, {responseType: "arraybuffer"});
            console.log("imageInfo res:", res);
            const buffer = Buffer.from(res.data, "binary");
            const size = sizeOf(buffer);
            console.log(size);
            resolve({
                width: size.width,
                height: size.height
            });
        } catch (error) {
            console.log(error);
            reject(error);
        }
    })
}

module.exports = imageInfo;

console.log(size)的日志 { height: 1000, width: 562, type: 'jpg' }

3. 常见命令

node -v

npm -v

npm init 一路回车就可以

npm install koa

npm install koa-json

npm install koa-bodyparser

npm install @koa/router @koa/cors mongoose

npm install nodemon -g

启动命令： nodemon app.js

4. 学习进度

看到第83了