@adobe/helix-pipeline/src/html/fetch-markdown.js

This project provides helper functions and default implementations for creating Hypermedia Processing Pipelines.

/*
 * Copyright 2018 Adobe. All rights reserved.
 * This file is licensed to you 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 REPRESENTATIONS
 * OF ANY KIND, either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
import { setdefault } from 'ferrum';

export default async function fetchMarkdown(context, { request, downloader }) {
  setdefault(context, 'content', {});
  if (!request || !request.params) {
    throw new Error('Request parameters missing');
  }
  const { content } = context;
  const {
    owner, repo, branch, path, ref,
  } = request.params;

  try {
    const res = await downloader.fetchGithub({
      owner,
      repo,
      ref,
      path,
      errorOn404: true,
    });

    content.body = res.body;

    setdefault(context.content, 'sources', []).push(downloader.computeGithubURI(owner, repo, branch || ref || 'master', path));
  } catch (err) {
    // throw error if no status error
    if (!err.status) {
      throw err;
    }
    // ignore
  }
}