我正在使用NodeJs (w/express),并且我正在尝试将一个zip文件回流到客户端。zip中包含的文件不在文件系统中,而是动态创建的。我想将文件内容流式传输到压缩包,然后将压缩包流回客户端。
也就是说,我希望客户端接收到:
tmp.zip
--> 1.txt
--> 2.txt
--> 3.txt
其中动态创建1,2,3.txt并将其流式传输到zip文件。这个是可能的吗?
发布于 2014-08-09 03:21:12
Archiver有一个append方法,可以让您将文本保存为文件。要将该数据“流式传输”给用户,只需通过管道将其发送到HTTP response对象。
var Http = require('http');
var Archiver = require('archiver');
Http.createServer(function (request, response) {
// Tell the browser that this is a zip file.
response.writeHead(200, {
'Content-Type': 'application/zip',
'Content-disposition': 'attachment; filename=myFile.zip'
});
var zip = Archiver('zip');
// Send the file to the page output.
zip.pipe(response);
// Create zip with some files. Two dynamic, one static. Put #2 in a sub folder.
zip.append('Some text to go in file 1.', { name: '1.txt' })
.append('Some text to go in file 2. I go in a folder!', { name: 'somefolder/2.txt' })
.file('staticFiles/3.txt', { name: '3.txt' })
.finalize();
}).listen(process.env.PORT);
这将创建一个包含两个文本文件的zip文件。访问此页面的用户将看到文件下载提示。
发布于 2020-06-29 21:54:55
使用expressjs和node- zip以二进制数据的形式发送zip文件:
app.get("/multipleinzip", (req, res) => {
var zip = new require('node-zip')();
var csv1 = "a,b,c,d,e,f,g,h\n1,2,3,4,5,6,7,8\n1,2,3,4,5,6,7,8\n1,2,3,4,5,6,7,8\n1,2,3,4,5,6,7,8";
zip.file('test1.file', csv1);
var csv2 = "z,w,x,d,e,f,g,h\n1,2,3,4,5,6,7,8\n1,2,3,4,5,6,7,8\n1,2,3,4,5,6,7,8\n1,2,3,4,5,6,7,8";
zip.file('test2.file', csv2);
var csv3 = "q,w,e,d,e,f,g,h\n1,2,3,4,5,6,7,8\n1,2,3,4,5,6,7,8\n1,2,3,4,5,6,7,8\n1,2,3,4,5,6,7,8";
zip.file('test3.file', csv3);
var csv4 = "t,y,u,d,e,f,g,h\n1,2,3,4,5,6,7,8\n1,2,3,4,5,6,7,8\n1,2,3,4,5,6,7,8\n1,2,3,4,5,6,7,8";
zip.file('test4.file', csv4);
var data = zip.generate({base64:false,compression:'DEFLATE'});
console.log(data); // ugly data
res.type("zip")
res.send(new Buffer(data, 'binary'));
})
为zip文件创建下载链接。使用->获取数据并将响应转换为数组缓冲区
//get the response from fetch as arrayBuffer...
var data = response.arrayBuffer();
const blob = new Blob([data]);
const fileName = `${filename}.${extension}`;
if (navigator.msSaveBlob) {
// IE 10+
navigator.msSaveBlob(blob, fileName);
} else {
const link = document.createElement('a');
// Browsers that support HTML5 download attribute
if (link.download !== undefined) {
const url = URL.createObjectURL(blob);
link.setAttribute('href', url);
link.setAttribute('download', fileName);
link.style.visibility = 'hidden';
document.body.appendChild(link);
link.click();
document.body.removeChild(link);
}
}
https://stackoverflow.com/questions/20107303
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