Issue with ReactNative iOS
Problem
Describe the bug Using v4 on ReactNative I am getting 404 from CloudFlare on ReactNative iOS. Same code works in standard node. Haven't checked with v3 yet. Other external requests work fine. Same code in both environments, code copied from sample. Log outputs compared: [code block] To Reproduce [code block] Code snippets _No response_ OS macOS Node version Node v16.x Library version v4b4
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1 Fix
Fix 404 Error from CloudFlare in ReactNative iOS
The 404 error from CloudFlare indicates that the request is not reaching the intended endpoint or that the endpoint is not configured correctly for iOS requests. This can occur due to differences in how ReactNative handles network requests on iOS compared to Node.js, including issues with CORS, incorrect URL formatting, or missing headers.
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- 1
Check API Endpoint URL
Ensure that the API endpoint URL is correctly formatted and accessible from the iOS environment. Sometimes, URLs that work in Node.js may not work in ReactNative due to differences in how they handle URLs.
javascriptconst apiUrl = 'https://your-api-endpoint.com'; - 2
Add Required Headers
Verify if the API requires specific headers (like Authorization or Content-Type) that may not be set in the ReactNative request. Add these headers to your fetch or axios request.
javascriptfetch(apiUrl, { method: 'GET', headers: { 'Authorization': 'Bearer your_token' } }); - 3
Check CORS Configuration
Ensure that the server's CORS settings allow requests from the ReactNative app. Update the server configuration if necessary to include the iOS app's origin.
httpAccess-Control-Allow-Origin: https://your-ios-app-origin.com - 4
Test with v3 of the Library
If the issue persists, test the same code with version 3 of the library to determine if the problem is specific to version 4. This can help isolate the issue.
bashnpm install your-library@3.x - 5
Debug Network Requests
Use tools like React Native Debugger or Flipper to inspect network requests and responses. This can provide insights into what is being sent and received, helping to identify issues.
bashreact-native log-android or react-native log-ios
Validation
Confirm that the 404 error no longer occurs by testing the API calls in the ReactNative iOS app. Check the network logs to ensure the requests are being sent correctly and responses are received as expected.
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Environment
Submitted by
Alex Chen
2450 rep