handler.ts

/*
 * Copyright 2017-2023 Elyra Authors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { URLExt } from '@jupyterlab/coreutils';
import { ServerConnection } from '@jupyterlab/services';

/**
 * Call the API extension
 *
 * @param endPoint API REST end point for the extension
 * @param init Initial values for the request
 * @returns The response body interpreted as JSON
 */
export async function requestAPI<T>(
  endPoint = '',
  init: RequestInit = {}
): Promise<T> {
  // Make request to Jupyter API
  const settings = ServerConnection.makeSettings();
  const requestUrl = URLExt.join(
    settings.baseUrl,
    'streamlit', // API Namespace
    endPoint
  );

  let response: Response;
  try {
    response = await ServerConnection.makeRequest(requestUrl, init, settings);
  } catch (error: any) {
    throw new ServerConnection.NetworkError(error);
  }

  let data: any;
  try {
    data = await response.json();
  } catch (error: any) {
    console.log('Not a JSON response body.', response);
  }

  if (!response.ok) {
    throw new ServerConnection.ResponseError(response, data.message || data);
  }

  return data || response;
}