Have looked at all the tutorials on how to download files from S3 to local disk. I have followed all the solutions and what they do is download the file to the server and not to the client. The code I currently have is
app.get('/download_file', function(req, res) {
var file = fs.createWriteStream('/Users/arthurlecalvez/Downloads/file.csv');
file.on('close', function(){console.log('done'); });
s3.getObject({ Bucket: 'data.pool.al14835', Key: req.query.filename }).on('error', function (err) {
console.log(err);
}).on('httpData', function (chunk) {
file.write(chunk);
}).on('httpDone', function () {
file.end();
}).send();
res.send('success')
})
How do I then send this to the client so that it is downloaded onto their device?
S3 supports the ability to generate a pre-signed URL via the AWS Javascript API. Users can then GET
this URL to download the S3 object to their local device.
you can use SignedURL Like that
var params = {Bucket: bucketname , Key: keyfile , Expires: 3600 , ResponseContentDisposition : `attachment; filename="filename.ext"` };
var url = s3.getSignedUrl('getObject', params);
the generated link will force download with the name filename.ext
If you have the file URL you can do it like that,
new Observable((observer) => {
var xhr = new XMLHttpRequest();
xhr.open("get", fileURL, true);
xhr.responseType = "blob";
xhr.onload = function () {
if (xhr.readyState === 4) {
observer.next(xhr.response);
observer.complete();
}
};
xhr.send();
}).subscribe((blob: any) => {
let link = document.createElement("a");
link.href = window.URL.createObjectURL(blob);
link.download = elem.material.driverUrl;
link.click();
});
The file URL is: https://BucketName.Region.amazonaws.com/Key Just replace with your Bucket name, Region and Key
您可以使用 res.download 方法http://expressjs.com/en/api.html#res.download吗?
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.