17 December 2024 Leave a comment Tech-Help
Developers often encounter the “Network Request Failed” error when working with React Native, particularly when making network requests using the fetch() API. This issue can arise from several underlying causes, including configuration settings and network restrictions. This guide aims to provide practical solutions to help you resolve this error effectively.
Common Causes and Solutions
1. HTTP vs. HTTPS Requests
One prevalent reason for this error is the restriction on HTTP requests. iOS, by default, does not permit HTTP requests for security reasons. To resolve this, you should configure your app to allow HTTP requests by updating the info.plist file:
<key>NSAppTransportSecurity</key>
<dict>
<key>NSAllowsArbitraryLoads</key>
<true/>
</dict>
Alternatively, you can specify exceptions for particular domains, which is a more secure approach:
<key>NSAppTransportSecurity</key>
<dict>
<key>NSExceptionDomains</key>
<dict>
<key>yourserver.com</key>
<dict>
<key>NSIncludesSubdomains</key>
<true/>
<key>NSTemporaryExceptionAllowsInsecureHTTPLoads</key>
<true/>
<key>NSTemporaryExceptionMinimumTLSVersion</key>
<string>TLSv1.1</string>
</dict>
</dict>
</dict>
2. Network Configuration on Android
For Android, beginning with API Level 28, cleartext traffic (HTTP) is blocked by default. To enable it, add the following to your AndroidManifest.xml:
<application
android:usesCleartextTraffic="true"
>
Ensure that you also have the INTERNET permission declared:
<uses-permission android:name="android.permission.INTERNET" />
3. Using the Correct Network Address
If you’re using localhost in your fetch URL, remember that the emulator or device might not resolve it correctly. Replace localhost with 10.0.2.2 for Android Emulator or your machine’s IP address for a physical device:
fetch('http://10.0.2.2:4000')
Additional Resources
For further insights into managing network requests and configurations in React Native, consider exploring our articles on debugging network requests and resolving fetch API issues.
Enhancing Testing with Repeato
Once your network requests are functioning correctly, ensuring their stability through testing is crucial. This is where Repeato proves invaluable. As a no-code test automation tool for iOS and Android, Repeato allows you to create, run, and maintain automated tests for your React Native apps efficiently. Leveraging computer vision and AI, it simplifies the testing process, making it particularly fast to edit and run tests. For more information on optimizing your testing workflow, visit our React Native testing page.
If you have any further questions or need assistance, feel free to contact us.
