Hi Magestik.
It has been a long time, I suppose you have already solved your problem, I also leave an answer here in case someone else arrives with the same question.
In Flutter, it is possible to access content through the HTTP protocol using the package http.
The easiest way to use this library is via the top-level functions.
For example:
import 'package:http/http.dart' as http;
var url = 'https://example.com/whatsit/create';
var response = await http.post(url, body: {'name': 'doodle', 'color': 'blue'});
print('Response status: ${response.statusCode}');
print('Response body: ${response.body}');
print(await http.read('https://example.com/foobar.txt'));
You can get more information in the package documentation http.
With this package it is possible to obtain data in various formats, for example in JSON format and it is also possible to obtain files such as images, etc.
Greetings.