node批量下载文件,打包成压缩包(以图片做例子)

备注说明:

1.需要依赖 archiver
2.调用方法的时候,一定要加上try...catch...

try {
    await all_down(list,response)
}catch (e) {
}
3.所有的文件流追加完后,一定记得

archive.finalize();

//引入依赖
var archiver = require('archiver');
//定义参数
 let list=[{path:‘img1.png’,name:'图片1'},{path:‘img2.png’,name:'图片2'}]

async function all_down(list,response) {
    var archive = archiver('zip');//设置压缩包类型
    archive.on('error', function(err) {
        throw err;
    });
    archive.store = true;  
    archive.pipe(response);

    for (let i=0;i<list.length;i++) {
        let item=list[i]
        let path=item.path
        let stream =fs.createReadStream(path);//获取图片流
        let index=path.lastIndexOf('.')
        let extname=path.substring(index)//获取图片后缀名
        let name = item.name+extname;  //定义成需要的名称
        archive.append(stream, { name: name })
           if (i==list.length-1){
             //最后一个文件流append到archive后,关闭archive
               archive.finalize();
           }
    };
    var fileName = 'text.zip';//压缩包名称
   //设置header
    response.setHeader('Content-Type', 'application/x-zip');
    response.setHeader("Content-Disposition", "attachment; filename=" + new Buffer(fileName).toString('binary'));
    archive.on('finish', function(err) {
        response.end('binary');
    });
}

 最终结果: