REST API

// Auto pilih single-shot atau chunked
const ENDPOINT   = 'https://stash.app';
const CHUNK_SIZE = 2097152;

async function stashUpload(file, expiry = '1d') {
  const sha = await sha256(file);
  const lookup = await fetch(`${ENDPOINT}/api/lookup`, {
    method:'POST', headers:{'content-type':'application/json'},
    body: JSON.stringify({ sha })
  }).then(r => r.json());
  if (lookup.hit) return lookup;

  if (file.size < CHUNK_SIZE) {
    const form = new FormData();
    form.append('file', file); form.append('expiry', expiry); form.append('sha', sha);
    return fetch(`${ENDPOINT}/api/upload`, { method:'POST', body:form }).then(r => r.json());
  }

  const uploadId = crypto.randomUUID().replace(/-/g,'').slice(0,16);
  const total    = Math.ceil(file.size / CHUNK_SIZE);
  let next = 0;
  await Promise.all(Array.from({ length:3 }, async () => {
    while (next < total) {
      const i = next++;
      const frm = new FormData();
      frm.append('uploadId', uploadId); frm.append('index', String(i));
      frm.append('total', String(total));
      frm.append('chunk', file.slice(i*CHUNK_SIZE, Math.min((i+1)*CHUNK_SIZE, file.size)), `part-${i}`);
      await fetch(`${ENDPOINT}/api/upload/chunk`, { method:'POST', body:frm });
    }
  }));
  return fetch(`${ENDPOINT}/api/upload/finish`, {
    method:'POST', headers:{'content-type':'application/json'},
    body: JSON.stringify({ uploadId, total, name:file.name, mime:file.type, size:file.size, sha, expiry })
  }).then(r => r.json());
}

async function sha256(file) {
  const d = await crypto.subtle.digest('SHA-256', await file.arrayBuffer());
  return Array.from(new Uint8Array(d)).map(b => b.toString(16).padStart(2,'0')).join('');
}

const r = await stashUpload(input.files[0], '1mo');
console.log(r.url, r.dl, r.preview);