lux-framework/src/packages/server/request/parser/utils/parse-write.js

Build scalable, Node.js-powered REST APIs with almost no code.

// @flow
import { MalformedRequestError } from '../errors';
import { tryCatchSync } from '../../../../../utils/try-catch';
import type { Request } from '../../interfaces';

import format from './format';

/**
 * @private
 */
export default function parseWrite(req: Request): Promise<Object> {
  return new Promise((resolve, reject) => {
    let body = '';
    const cleanUp = () => {
      req.removeAllListeners('end');
      req.removeAllListeners('data');
      req.removeAllListeners('error');
    };

    req.on('data', data => {
      body += data.toString();
    });

    req.once('end', () => {
      const parsed = tryCatchSync(() => JSON.parse(body));

      cleanUp();

      if (parsed) {
        resolve(format(parsed, req.method));
      } else {
        reject(new MalformedRequestError());
      }
    });

    req.once('error', err => {
      cleanUp();
      reject(err);
    });
  });
}