function onResponse()

in lib/net/request.js [30:60]

• 23 lines of code
• 9 McCabe index (conditional complexity)

  function onResponse(res) {
    /**@type {*}*/
    let data = '';
    /**@type {(Error & {statusCode?: number, data?: *})|null}*/
    let error = null;

    res.on('data', (chunk) => {
      data += chunk.toString();
    });

    res.on('end', function() {
      const contentType = res.headers['content-type'] || '';

      if (contentType.indexOf('application/json') > -1) {
        data = JSON.parse(data);
      }

      if (res.statusCode && (res.statusCode < 200 || res.statusCode > 299)) {
        const errorDesc = data.error_description || '';
        error = new Error('[' + res.statusCode + '] ' + (errorDesc || res.statusMessage));
        error.statusCode = res.statusCode;
        error.data = data;
      }

      fn && fn(error, data);
    });

    res.on('error', (error) => {
      fn && fn(error, data);
    });
  }