const http = require('http');

http.get('http://192.168.1.6:8080/getDemo?msg=12', (res) => {

  const { statusCode } = res;

  const contentType = res.headers['content-type'];

  let error;

  if (statusCode !== 200) {

    error = new Error(`Request Failed.\n` +

                      `Status Code: ${statusCode}`);

  } else if (!/^application\/json/.test(contentType)) {

    error = new Error(`Invalid content-type.\n` +

                      `Expected application/json but received ${contentType}`);

  }

  if (error) {

    console.error(error.message);

    // consume response data to free up memory

    res.resume();

    return;

  }

  res.setEncoding('utf8');

  let rawData = '';

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

  res.on('end', () => {

    try {

      const parsedData = JSON.parse(rawData);

      console.log(parsedData);

    } catch (e) {

      console.error(e.message);

    }

  });

}).on('error', (e) => {

  console.error(`Got error: ${e.message}`);

});