'http' packavfge code example

Example 1: flutter http

dependencies:
  http: ^0.12.0+4

Example 2: dart httop client

var client = http.Client();
try {
  var uriResponse = await client.post('https://example.com/whatsit/create',
      body: {'name': 'doodle', 'color': 'blue'});
  print(await client.get(uriResponse.bodyFields['uri']));
} finally {
  client.close();
}