django-reactnative-websocket-docs

Documentation for making realtime app using django as backend and react native as frontend

Follow the step from https://github.com/mitchtabian/HOWTO-django-channels-daphne

Thank you to mitchtabian !!!!

Error after deployment

1. Obtain a Trusted SSL/TLS Certificate

To resolve the "java.security.cert.CertPathValidatorException: Trust anchor for certification path not found" error, you need to obtain a valid SSL/TLS certificate from a trusted Certificate Authority (CA) like Let's Encrypt or a commercial CA. Make sure the certificate is properly configured on your WebSocket server.

openssl s_client -showcerts -connect your.domain.com:443 < /dev/null

Copy the certificate starting from -----BEGIN CERTIFICATE----- to -----END CERTIFICATE-----, and save it as server.crt.

1 s:C = US, O = Let's Encrypt, CN = R3
i:C = US, O = Internet Security Research Group, CN = ISRG Root X1
a:PKEY: rsaEncryption, 2048 (bit); sigalg: RSA-SHA256
v:NotBefore: Sep  4 00:00:00 2020 GMT; NotAfter: Sep 15 16:00:00 2025 GMT

2. Include the SSL Certificate in Your Android Project

Place the server.crt certificate file in the android/app/src/main/res/raw/ directory of your Android project.

3. Configure Network Security for Android

Create a file named network_security_config.xml in the android/app/src/main/res/xml/ directory.

4. Add the Certificate to the Network Security Configuration

Inside network_security_config.xml, add the following lines to include the server.crt certificate:

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
    <domain-config cleartextTrafficPermitted="true">
        <domain includeSubdomains="true">10.0.2.2</domain><!-- debugger -->
        <domain includeSubdomains="false">localhost</domain><!-- Debug port without local server -->
        <domain includeSubdomains="true">YOUR_IP_ADDRESS</domain><!-- Debug port -->
        <domain includeSubdomains="true">your_website.com</domain>
        <trust-anchors>
            <certificates src="@raw/server" />
        </trust-anchors>
    </domain-config>
</network-security-config>

5. Reference the Network Security Configuration in AndroidManifest.xml

In the android/app/src/main/AndroidManifest.xml file, add the following line to reference the network security configuration:

<application
    ...
    android:networkSecurityConfig="@xml/network_security_config"
    ...>

6. Clean and Rebuild the Android Project

cd android
./gradlew clean

7. Run Your React Native App

After cleaning, run npx react-native run-android again to rebuild the project with the network security configuration.

By following these steps, the error should be resolved, and your React Native app should be able to connect to the WebSocket server with the trusted SSL/TLS certificate.