profile-store.js

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
// @flow

export function uploadBinaryProfileData(
  data: string,
  progressChangeCallback?: number => mixed
): Promise<string> {
  return new Promise((resolve, reject) => {
    const xhr = new XMLHttpRequest();

    xhr.onload = () => {
      if (xhr.status === 200) {
        resolve(xhr.responseText);
      } else {
        reject(
          new Error(
            `xhr onload with status != 200, xhr.statusText: ${xhr.statusText}`
          )
        );
      }
    };

    xhr.onerror = () => {
      reject(
        new Error(`xhr onerror was called, xhr.statusText: ${xhr.statusText}`)
      );
    };

    xhr.upload.onprogress = e => {
      if (progressChangeCallback && e.lengthComputable) {
        progressChangeCallback(e.loaded / e.total);
      }
    };

    xhr.open('POST', 'https://profile-store.appspot.com/compressed-store');
    xhr.send(data);
  });
}