node批量下載文件,打包成壓縮包(以圖片做例子)

備注說明:

1.需要依賴 archiver
2.調用方法的時候,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,一定記得

archive.finalize();

//引入依賴
var archiver = require('archiver');
//定義參數
 let list=[{path:‘img1.png’,name:'圖片1'},{path:‘img2.png’,name:'圖片2'}]

async function all_down(list,response) {
    var archive = archiver('zip');//設置壓縮包類型
    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);//獲取圖片流
        let index=path.lastIndexOf('.')
        let extname=path.substring(index)//獲取圖片后綴名
        let name = item.name+extname;  //定義成需要的名稱
        archive.append(stream, { name: name })
           if (i==list.length-1){
             //最后一個文件流append到archive后,關閉archive
               archive.finalize();
           }
    };
    var fileName = 'text.zip';//壓縮包名稱
   //設置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');
    });
}

 最終結果: