API call
- Flutter course
- Intermediate
- Lesson 62/99
- 4 min
Send a request to the weather API with http.get.
Request with http.get
To fetch weather data from an API you use the get function from the http package. It returns a Future<Response>; you await it and reach the JSON string via response.body.
import 'package:http/http.dart' as http;
Future<String> havaGetir() async {
final uri = Uri.parse('https://api.example.com/hava/istanbul');
final response = await http.get(uri);
return response.body;
}URL with Uri.parse
http.get expects a Uri; you turn a plain string into a Uri with Uri.parse. Properly formatting the URL makes requests succeed.
final uri = Uri.parse('https://api.example.com/hava/ankara');
final response = await http.get(uri);
print(response.statusCode); // 200Practice The havaDurumuGetir function
Write an async function named havaDurumuGetir. Convert the URL to a Uri with Uri.parse, send a request with http.get, and return response.body. In main, parse the URL with Uri.parse and print it.
Starter code
import 'package:http/http.dart' as http;
// havaDurumuGetir fonksiyonunu yaz
// Uri.parse ile URL'yi çevir
// http.get ile isteği at ve response.body'yi döndür
void main() {
// URL'yi Uri.parse ile çöz ve yazdır
}Sample solution
import 'package:http/http.dart' as http;
Future<String> havaDurumuGetir() async {
final uri = Uri.parse('https://api.example.com/hava/istanbul');
final response = await http.get(uri);
return response.body;
}
void main() {
final uri = Uri.parse('https://api.example.com/hava/istanbul');
print(uri);
}Expected output
https://api.example.com/hava/istanbul
Questions and answers
Review the lesson questions together with their answers. To test yourself, solve the lesson interactively.
1 What does the http.get call return?
- Future<Response> Correct answer
- Widget
- void
- String
Explanation: http.get returns a Future<Response>; after await you get the Response object. void has no return value, String is not direct (accessed via response.body), and Widget is for UI.
2 The http.get call
import 'package:http/http.dart' as http;
Future<String> getir() async {
final uri = Uri.parse('https://api.example.com/hava/izmir');
final response = await ____;
return response.body;
}import 'package:http/http.dart' as http;
Future<String> getir() async {
final uri = Uri.parse('https://api.example.com/hava/izmir');
final response = await http.get(uri);
return response.body;
}Explanation: http.get takes a Uri and sends a request; await waits for the Response. post is a different request, an empty call is incomplete, and jsonDecode does not take a URI.
3 http package parts
| Term | Meaning |
|---|---|
http.get |
Sends a request to the API |
Uri.parse |
Converts a string to a Uri |
response.body |
Response body |
await |
Waits for a Future |