resolve-runtime/es/utils/extract_request_body.js

This package create server with resolve.

const convertToCharset = (input, charset) => Buffer.from(input, 'utf8').toString(charset);

const extractRequestBody = req => {
  if (req.body === null) {
    return req.query;
  }

  const [contentType, charsetEntry] = String(req.headers['content-type']).split(';').map(value => value.trim().toLowerCase());
  const charset = charsetEntry != null ? charsetEntry.substring(8) : null;
  let bodyFields = {};

  switch (contentType) {
    case 'application/json':
      {
        bodyFields = JSON.parse(charset != null ? convertToCharset(req.body, charset) : req.body);
        break;
      }

    case 'application/x-www-form-urlencoded':
      {
        bodyFields = req.body.split('&').reduce((acc, pair) => {
          let [key, value] = pair.split('=').map(decodeURIComponent);

          if (charset != null) {
            key = convertToCharset(key, charset);
            value = convertToCharset(value, charset);
          }

          acc[key] = value;
          return acc;
        }, {});
        break;
      }

    default:
      {
        throw new Error('Unsupported Content-Type in request body');
      }
  }

  return Object.assign(bodyFields, req.query);
};

export default extractRequestBody;
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