Backend implementation for https://www.npmjs.com/package/cs-file-transfer-upload.
npm i cs-file-transfer-upload-backend
var ChunkedUpload = require('cs-file-transfer-upload-backend/chunkedUpload.js');
var storage = '/home/user/Desktop/test_backend/storage'; // folder for uploaded files
var chunks = '/home/user/Desktop/test_backend/chunks'; // folder to place chunks of files
var chunkedUpload = new ChunkedUpload(storage, chunks);
chunkedUpload.post(req, async function (status) {
if (status === 'done') {
await chunkedUpload.merge(req.body.fileName, req.body.numberOfChunks, req.body.size);
await chunkedUpload.clean(req.body.fileName, req.body.numberOfChunks, req.body.size);
} else if (status === 'partially_done'){
// do something
}
});
// When the last chunk is uploaded it will trigger callback with
// status done, use merge function to merge all chunks into one file,
// and use clean function to delete chunks from chunks folder.
chunkedUpload.get(req, function(chunks) {
res.send(chunks);
});
// Returns chunk object that looks like this:
{
chunks: (10) [true, true, false, false, false, false, false, false, false, false],
length: 2
}
// It shows which chunks have been uploaded and how many.
See example here: https://github.com/cloverstudio/CSFileTransferBackend