Get Binary Content

get-binary-content.js

function getBinaryContent(url, start, end, i) {
  return new Promise((resolve, reject) => {
    try {
      let xhr = new XMLHttpRequest();
      xhr.open("GET", url, true);
      xhr.setRequestHeader("range", `bytes=${start}-${end}`); // Set range request information
      xhr.responseType = "arraybuffer"; // Set the returned type to arraybuffer
      xhr.onload = function () {
        resolve({
          index: i, // file block index
          buffer: xhr.response,
        });
      };
      xhr.send();
    } catch (err) {
      reject(new Error(err));
    }
  });
}