Check Network Connectivity
- Ensure that the device or emulator is properly connected to the internet. A poor or unstable network can lead to abrupt connection terminations.
- Use logging or monitoring tools to track network connectivity status throughout the app lifecycle for diagnostic purposes.
Update Dart SDK and Dependencies
- Run the following commands to upgrade your Dart SDK and all dependencies, which may contain fixes for connectivity issues:
flutter pub upgrade
flutter pub get
Increase Timeout Duration
- Set a longer timeout duration for HTTP requests to allow slower servers more time to respond:
import 'package:http/http.dart' as http;
final response = await http.get(Uri.parse('https://example.com'), headers: {
'Connection': 'keep-alive',
}).timeout(const Duration(seconds: 30));
Handle Exceptions Gracefully
- Implement try-catch blocks around your HTTP requests to manage exceptions and retry strategies:
try {
final response = await http.get(Uri.parse('https://example.com')).timeout(const Duration(seconds: 30));
if (response.statusCode == 200) {
// Process the response.
}
} catch (e) {
// Handle errors like timeout, network issues, etc.
}
Use Dio Package for Advanced Features
- Consider using the Dio package for more control over networking tasks, such as automatic retries and request interceptors:
import 'package:dio/dio.dart';
final dio = Dio();
try {
final response = await dio.get('https://example.com');
if (response.statusCode == 200) {
// Process the response.
}
} on DioError catch (e) {
// Handle Dio specific errors.
}
Optimize Backend Configuration
- Ensure the server supports connections from all relevant network protocols used by your client. Check configurations such as headers, SSL/TLS compatibility, etc.
- Configure the server to handle keep-alive requests and support longer timeouts where appropriate.
Use Proxy or VPN for Testing
- If network restrictions exist, use a proxy or VPN to test the application's connectivity from various network environments.
- Analyze if there are discrepancies in server response when accessing through different network routes.