code: function getImageSizeFromURL(url) {
  	return new Promise((resolve, reject) => {
  		url = parseUrl(url);
  		const transport = url.protocol === 'https:' ? https : http;
  
  		transport.get(url, resp => {
  			const chunks = [];
  			let bufSize = 0;
  
  			const trySize = chunks => {
  				try {
  					const size = sizeOf(Buffer.concat(chunks, bufSize));
  					resp.removeListener('data', onData);
  					resp.destroy(); // no need to read further
  					resolve(sizeForFileName(path.basename(url.pathname), size));
  				} catch(err) {
  					// might not have enough data, skip error
  				}
  			};
  
  			const onData = chunk => {
  				bufSize += chunk.length;
  				chunks.push(chunk);
  				trySize(chunks);
  			};
  
  			resp
  			.on('data', onData)
  			.on('end', () => trySize(chunks))
  			.once('error', err => {
  				resp.removeListener('data', onData);
  				reject(err);
  			});
  		})
  		.once('error', reject);
  	});
  }
docs: Get image size from given remove URL
  @param  {String} url
  @return {Promise}