How to download 10GB file with Angularjs, Java, Tomcat,Spring and REST?

Question

When I download small file , everything is OK , but I need some way to download large files . If file large, Blob didn't created , haven't enough memory. Download file without save on client , directly save to disk with many requests on the server or something like that.

My code on server is :

@RequestMapping(value = "/oneFile/{name}", method = RequestMethod.GET)
    public void getOneFile( @PathVariable("name") String name, HttpServletResponse response,HttpServletRequest request) {
                ....
                InputStream in = new FileInputStream(new File(file.getAbsolutePath()));
                org.apache.commons.io.IOUtils.copy(in, response.getOutputStream());
                response.flushBuffer();

On client and this is work for small size:

backupFileServer.downloadOneFileBrow(data)
                        .success(function(databack) {

                            var file = new Blob([ databack ], {
                                type : 'application/csv'
                            });
                            var fileURL = URL.createObjectURL(file);
                            var a = document.createElement('a');
                            a.href = fileURL;
                            a.target = '_blank';
                            a.download = data;
                            document.body.appendChild(a);
                            a.click();
                        })
                        .error(function() {
                            alert($scope.DOWNLOAD_ERROR);
                        });

I tried something like this but didn't work :

var a = document.createElement('a');
                               a.href = 'data:attachment/csv;charset=utf-8,' + encodeURI(databack);
                               a.target = '_blank';
                               a.download = data;
                               document.body.appendChild(a);
                               a.click();

How someone idea how to do this or some example or code ....
Thank you in advance

It is just not the right solution for the problem. You should think in the direction of other ways, e.g. FTP, BitTorrent, ... — Alexander Rühl, Jan 18 '16 at 09:42
I would like if possible without FTP or BitTorrent or something like that ... if possible ... if not , I will must on that way . — zexco2, Jan 18 '16 at 09:48
It remains one of the ways, type is not problem. If I download zip file of 500MB , everything works fine , but if I download zip file of 2GB or larger sizes I have problem from question . — zexco2, Jan 18 '16 at 10:22
my app is using spring boot service from where i am trying to send the 400 MB zip file to client.. but Save File box appears too late approx after 15 min .. not sure y .. my UI is Angular .. nto sure what wrong m doing — Vrajendra Singh Mandloi, May 06 '20 at 19:16

rbinsztock · Accepted Answer · 2016-01-18T13:59:06.360

3

You need to split your file into multiple files and rebuild the file with your server. Because it's bad practice to upload a big file without splitting it, the user can be disconnect at 99% of the upload and he need to upload the whole file again.

An example here : https://flowjs.github.io/ng-flow/

A good example here : http://ryansouthgate.com/2015/12/24/upload-amazon-s3-using-angularjs/ with Amazon S3 and their SDK.

edited Jan 18 '16 at 13:59

answered Jan 18 '16 at 09:48

rbinsztock

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This is going to be helpful, but if I understand this is to upload the file, I need something to download file ? – zexco2 Jan 18 '16 at 10:00
yes it's the same for download if you have a large file you need to split it into small chunks and the browser will recompile all the file at the end. Like https://mega.nz/ does I think. More informations here : http://stackoverflow.com/a/27948228/861206 – rbinsztock Jan 18 '16 at 13:53

How to download 10GB file with Angularjs, Java, Tomcat,Spring and REST?

1 Answers1