Function createReadConfigFile

packages/api/src/context/createReadConfigFile.js:23–38

({ buildDirectory, fileCache })

const validPathPattern = /^[A-Za-z0-9\-_/.:]+$/;

function createReadConfigFile({ buildDirectory, fileCache }) {
  async function readConfigFile(filePath) {
    if (!validPathPattern.test(filePath) || filePath.includes('..')) {
      return null;
    }
    const fileContent = await readFile(path.resolve(buildDirectory, filePath));
    if (getFileExtension(filePath) === 'json') {
      return serializer.deserializeFromString(fileContent);
    }
    return fileContent;
  }
  return cachedPromises({
    cache: fileCache,
    getter: readConfigFile,
  });
}

export default createReadConfigFile;