zip并使用nodejs将文件夹下载到本地

Question

如何从D:/downloads path压缩和下载文件夹。作为第一步，我能够在"下载"中创建一个包含虚拟内容的文件夹。下一步，我想压缩并下载这个文件夹。

async downloadFolder(selectedProduct) {
try {
let completeZip = await this.jobService.zipBlobs(selectedProduct.path, this.role).toPromise();
if(completeZip['status']=='success'){
let download = await this.jobService.downloadBlobs(selectedProduct.path, this.role).toPromise();
console.log(download)
}
} catch (error) {
console.log(error);
}
}

API:

一旦文件写入，我想压缩文件夹并将其下载到本地，但是什么也没发生

exports.zipBlobs = async function (req, res) {
var userrole = req.body.userrole;
var path = req.body.path;
fileUploadPath="d:/downloads"; 
blobService.listBlobsSegmentedWithPrefix(containerName, path, null, (err, data) => {
if (err) {
reject(err);
} else {
data.entries.forEach(entry => {
console.log(entry.name);//'155ce0e4-d763-4153-909a-407dc4e328d0/63690689-e183-46ae-abbe-bb4ba5507f1a_MULTI_0_3/output/res2/res2.fcs';
if (fs.existsSync(fileUploadPath)) {
var sourceFilePath = fileUploadPath +'/'+entry.name ;
if (!fs.existsSync(sourceFilePath)) {
fs.mkdir(require('path').dirname(sourceFilePath), { recursive: true }, (err) => {
if (err) {
console.log("Failed :" + err);
}
else{
console.log('folder created,create file');
const fstream = fs.createWriteStream(sourceFilePath);
fstream.write('fileContent');
fstream.end();
fstream.on("finish", f => {
console.log('finish',f) ;                
});
fstream.on("error", e => {
console.log('error',e);
});
}
});
}else{
console.log('folders already exists,create file');
const fstream = fs.createWriteStream(sourceFilePath);
fstream.write('fileContent');
fstream.end();
fstream.on("finish", f => {
console.log('finish',f) ;                
});
fstream.on("error", e => {
console.log('error',e);
});
}
}else{
console.log('downloads folder does not exists!')
}
});
}
});
}

API压缩和下载文件夹:

exports.downloadFolders = async function (req, res) {
var userrole = req.body.userrole;
var path = req.body.path;
try {

const folderpath = 'D:downloads622b6a148a813f18b8b2de81';
require('child_process').execSync(`zip -r archive *`, {
cwd: folderpath
});
// does not create zip, neither downloads
res.download(folderpath + '/archive.zip');
return;
}catch(error_1) {
res.status(200).json({
status: error_1
});
return;
}
}

Answer 1

在Javascript字符串中，反斜杠必须是双斜杠:

const folderpath = 'D:\downloads\622b6a148a813f18b8b2de81';

不将它们翻倍，就可以得到

const folderpath = 'D:downloads22b6a148a813f18b8b2de81'

因为'd' === 'd'和'6'是不可打印的字符。

也可以将zip的结果写入标准输出，并将其管道输入响应对象:

res.set("Content-Disposition", "attachment;filename=archive.zip");
require("child_process").exec("zip -r - *", {
cwd: folderpath
}).stdout.pipe(res);

Answer 2

这是我在我的一个项目中使用的，我需要将整个目录下载为zip:

require以下库:

const zipdir = require('zip-dir')

然后，当你需要下载zip文件时，调用它如下:

zipdir(
'D:/downloads/622b6a148a813f18b8b2de81',
{ saveTo: 'D:/downloads/622b6a148a813f18b8b2de81/archive.zip' },
(err, buffer) => {
if (err) throw err;
console.log('New zip file created!');
}
);

以下是API签名:

app.get('/api/zip', function (req, res) {
//create new zip
zipdir(
'D:/downloads/622b6a148a813f18b8b2de81',
{ saveTo: 'D:/downloads/622b6a148a813f18b8b2de81/archive.zip' },
(err, buffer) => {
if (err) throw err;
console.log('New zip file created!');
res.download('D:/downloads/622b6a148a813f18b8b2de81/archive.zip');
}
);
});