Get&Post Data With Http In Flutter

In this article, we will learn how to send and receive data over HTTP in Flutter and then parse that data into a model.

Firstly, we will use the http package provided by Flutter to handle HTTP requests. This package provides the necessary functions and classes for making and receiving HTTP requests. When sending requests, JSON format is commonly used for the data. Flutter provides an in-built JSON library that makes working with JSON data easier.

The process of sending data involves creating an HTTP request, sending the request to the server, and handling the response from the server. First, you need to add the http package to your project and import the necessary dependencies.

The next step is to use the http.post() method, which allows us to create and send an HTTP request. We specify a URL and add the data we want to send in JSON format.

To handle the response from the server, we use the http.Response class. This class allows us to receive the response and provides various methods to read its content.

To parse the data into a model, we need to create a model class. The model class represents the structure of the data received from the server. We use the json.decode() method to map the fields in the JSON response to properties in the model class.

Once you have populated your model with the data, you can update the user interface based on this model or perform any other operations.

In conclusion, sending data over HTTP and parsing it into a model in Flutter is straightforward. The http package and JSON library make this process easy and efficient.

Sending and parsing data using HTTP is an essential skill for many mobile applications. By using this method, you can communicate with a server, perform real-time updates, and enhance the user experience.

Remember to pay attention to security and error handling. It’s important to use SSL certificates for HTTP requests and take appropriate measures to handle error scenarios.

Sending and parsing data over HTTP in Flutter is just one of the many capabilities provided by Flutter, a powerful and flexible tool. By leveraging these capabilities, you can create rich and interactive mobile applications and connect with your users.

Data Retrieval and Export to Model (HTTP GET)

import 'dart:convert';
import 'package:http/http.dart' as http;

class MyModel {
  final String name;
  final String email;

  MyModel({required this.name, required this.email});

  factory MyModel.fromJson(Map<String, dynamic> json) {
    return MyModel(
      name: json['name'],
      email: json['email'],
    );
  }
}

Future<void> fetchData() async {
  final url = Uri.parse('http://example.com/api/data');
  
  final response = await http.get(url);

  if (response.statusCode == 200) {
    final data = jsonDecode(response.body);
    final model = MyModel.fromJson(data);
    print('Veriler: ${model.name}, ${model.email}');
  } else {
    print('Hata: ${response.statusCode}');
  }
}

void main() async {
  await fetchData();
}

Veri Gönderme (HTTP POST)

import 'dart:convert';
import 'package:http/http.dart' as http;

Future<void> postData() async {
  final url = Uri.parse('http://example.com/api/endpoint'); //Repclace Your Endpoint
  final headers = {'Content-Type': 'application/json'};
  final body = jsonEncode({'name': 'John Doe', 'email': 'john@example.com'});

  final response = await http.post(url, headers: headers, body: body);

  if (response.statusCode == 200) {
    print('Data Sending Success.');
  } else {
    print('Hata: ${response.statusCode}');
  }
}

void main() async {
  await postData();
}

Each code block contains examples related to a specific HTTP operation. The first code block enables sending data (POST) in JSON format, and the second code block performs the process of receiving data from the server and parsing it into a model (GET).

Please note that when using the code, you should replace the URLs with your own server endpoints. Additionally, you can customize the code according to your error handling, security, and specific requirements.