使用node.js下载图片

待我称王封你为后i 2022-12-29 09:27 83阅读 0赞

要准备下载的图片：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTkzMjE1Nw_size_16_color_FFFFFF_t_70]

代码：

const http = require('http')
    const cheerio = require('cheerio')
    const download = require('download')
    
    const HOST = 'http://www.18183.com/yxzjol/?soucre=bdald'
    let req = http.request(HOST, res => { 
        //异步的响应
       // console.log(res)
        //监听data事件，并获取传递过来的数据片段
        //拼接数据片段
        let chunks=[]
        res.on('data', chuck => { 
           chunks.push(chuck)
        })
        //监听end事件，获取数据完毕时触发
        res.on('end', () => { 
            //拼接所有的chuck,并转化或字符串==》html字符串
            //console.log(Buffer.concat(chunks).toString('utf-8'))
            let htmlStr = Buffer.concat(chunks).toString('utf-8')
            let $ = cheerio.load(htmlStr)
             
           
            //$('.pic-menu ul li img ').each( function (index, item) { 
            // console.log(index,item)
            // console.log($(item).attr('src'))
    
            //})
            //获取图片
            let imgs = Array.prototype.map.call($('.pic-menu ul li img '), item => $(item).attr('src'))
    
            //let imgs= $('.pic-menu ul li img ').map((index,item) => $(item).attr('src'))
            // console.log(imgs[0])
            console.log(imgs)
            //下载图片
            Promise.all(imgs.map(x => download(x, 'dist'))).then(() => { 
    
                console.log('Download complete');
            })
        })
    })
    //将请求发出
    req.end()

注意：引入cheerio，download包

完成效果：

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTkzMjE1Nw_size_16_color_FFFFFF_t_70 1]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTkzMjE1Nw_size_16_color_FFFFFF_t_70]: /images/20221120/64103806936f4e41add9648d7eeae02a.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NTkzMjE1Nw_size_16_color_FFFFFF_t_70 1]: /images/20221120/de068033995045e5a0a4da560368d3b3.png