问使用post将十六进制文件数据发送到不同的域

EN

const fileInput = document.getElementById('file-input')
const file = fileInput.files[0]
const xhr = new XMLHttpRequest()

xhr.onerror = (e) => {
  console.log(e)
}

xhr.upload.addEventListener('progress', (e) => {
  // handle notifications about upload progress: e.loaded / e.total
  const { loaded, total } = e
  console.log(`${loaded} / ${total}`)
}, false)

xhr.onreadystatechange = () => {
  if (xhr.readyState === XMLHttpRequest.DONE) {
    if (xhr.status >= 200 && xhr.status <= 299) {
      // upload completed
    }
  }
}

xhr.open('PUT', 'linktoupload', true)
xhr.setRequestHeader('Content-Type', 'application/octet-stream')
xhr.send(file)