Chunked Upload with Checksum

Compute a file hash before chunked upload and send it during assembly for integrity verification.

(function() {
 var logEl = document.getElementById('log');
 function log(m) { var d = document.createElement('div'); d.className='pkg-log-entry'; d.textContent=m; logEl.appendChild(d); logEl.scrollTop=logEl.scrollHeight; }
 new MultipleUpload('#demo', {
 uploadUrl: '/api/upload',
 multiple: true,
 chunked: true,
 chunkSize: '1MB',
 computeHash: true,
 hashAlgorithm: 'sha256',
 onHashComputed: function(task, hash) {
 log(task.fileName + ' SHA-256: ' + hash.slice(0, 24) + '...');
 },
 onTaskComplete: function(task) {
 log(task.fileName + ' uploaded with verified checksum');
 }
 });
})();