Summary - http
- Flutter course
- Intermediate
- Lesson 50/99
- 4 min
Combine http.get and statusCode to fetch data.
Summary - http
In this section you learned three things: with the http package you make REST requests; with http.get you fetch data; with response.statusCode you do error handling.
final response = await http.get(
Uri.parse('https://api.example.com/data'),
);
if (response.statusCode == 200) {
print(response.body);
}Combining these, you build a data fetching screen.
Practice Build a data fetching screen
Write an async method veriCek. Make a request with http.get(Uri.parse('https://api.example.com/kullanici')). If response.statusCode == 200, print 'gövde: ${response.body}'; otherwise print 'hata: ${response.statusCode}'. In main, await veriCek and call print('bitti').
Starter code
import 'package:http/http.dart' as http;
// veriCek: async metot ekle
void main() async {
// veriCek'i çağır ve mesaj yazdır
}Sample solution
import 'package:http/http.dart' as http;
Future<void> veriCek() async {
final response = await http.get(Uri.parse('https://api.example.com/kullanici'));
if (response.statusCode == 200) {
print('gövde: ${response.body}');
} else {
print('hata: ${response.statusCode}');
}
}
void main() async {
await veriCek();
print('bitti');
}Expected output
gövde: {"isim":"Ayşe"}
bitti
Questions and answers
Review the lesson questions together with their answers. To test yourself, solve the lesson interactively.
1 What is done if statusCode is 200 on the data fetching screen?
- The request is sent again
- The app is closed
- An error message is shown
- response.body is processed and shown Correct answer
Explanation: If statusCode is 200, the request succeeded; response.body is processed and reflected to the screen.
2 Complete the http.get call
final response = await http.____(Uri.parse('https://api.example.com/veri'));final response = await http.get(Uri.parse('https://api.example.com/veri'));Explanation: http.get takes a Uri and returns a Response; it is used to fetch data.
3 http section parts
| Term | Meaning |
|---|---|
http |
Package making REST requests |
get |
Data fetching method |
statusCode |
Property giving HTTP status code |
Response |
Request return object |