dropbox/src/download-request.js

The Dropbox JavaScript SDK is a lightweight, promise based interface to the Dropbox v2 API that works in both nodejs and browser environments.

import { getBaseURL, httpHeaderSafeJson, isWindowOrWorker } from './utils';

function getDataFromConsumer(res) {
  if (!res.ok) {
    return res.text();
  }

  return (isWindowOrWorker()) ? res.blob() : res.buffer();
}

function responseHandler(res, data) {
  if (!res.ok) {
    // eslint-disable-next-line no-throw-literal
    throw {
      error: data,
      response: res,
      status: res.status,
    };
  }

  const result = JSON.parse(res.headers.get('dropbox-api-result'));

  if (isWindowOrWorker()) {
    result.fileBlob = data;
  } else {
    result.fileBinary = data;
  }

  return result;
}

export function downloadRequest(fetch) {
  return function downloadRequestWithFetch(path, args, auth, host, accessToken, options) {
    if (auth !== 'user') {
      throw new Error(`Unexpected auth type: ${auth}`);
    }

    const fetchOptions = {
      method: 'POST',
      headers: {
        Authorization: `Bearer ${accessToken}`,
        'Dropbox-API-Arg': httpHeaderSafeJson(args),
      },
    };

    if (options) {
      if (options.selectUser) {
        fetchOptions.headers['Dropbox-API-Select-User'] = options.selectUser;
      }
      if (options.selectAdmin) {
        fetchOptions.headers['Dropbox-API-Select-Admin'] = options.selectAdmin;
      }
      if (options.pathRoot) {
        fetchOptions.headers['Dropbox-API-Path-Root'] = options.pathRoot;
      }
    }


    return fetch(getBaseURL(host) + path, fetchOptions)
      .then(res => getDataFromConsumer(res).then(data => [res, data]))
      .then(([res, data]) => responseHandler(res, data));
  };
}