@adobe/helix-deploy/src/template/aws-pages-proxy.js

Library and Commandline Tools to build and deploy OpenWhisk Actions

/*
 * Copyright 2021 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.
 */
/* eslint-disable no-console */
// eslint-disable-next-line import/no-unresolved
const AWS = require('aws-sdk');
const { promisify } = require('util');

/**
 * Proxy function that invokes the respective function based on the route parameters for
 * the helix-pages project.
 *
 * The following routes need to use this function:
 *
 * ANY /{package}/{action}
 * ANY /{package}/{action}/{path+}
 *
 * package := "pages_{version}"
 *
 * Note that the package (pages) is currently hardcoded for simplicity.
 *
 * @param event
 * @returns {Promise<{body, statusCode}|any>}
 */
exports.handler = async (event) => {
  const lambda = new AWS.Lambda();
  const invoke = promisify(lambda.invoke.bind(lambda));

  const { package: pkg, action } = event.pathParameters;
  const match = /pages_(.+)/.exec(pkg);
  if (!match) {
    console.error('unknown package segment:', pkg);
    return {
      statusCode: 404,
    };
  }
  const version = match[1];

  const FunctionName = `pages--${action}:${version.replace(/\./g, '_')}`;

  try {
    console.log(`invoking: ${FunctionName}`);
    const ret = await invoke({
      FunctionName,
      Payload: JSON.stringify(event),
    });
    const data = JSON.parse(ret.Payload);
    console.log(`statusCode: ${data.statusCode}`);
    return data;
  } catch (err) {
    console.error(err);
    return {
      statusCode: err.statusCode,
      body: err.message,
    };
  }
};