Websocket connection to wss:// failed

ghz 9months ago ⋅ 131 views

I have a web application deployed and served by Angular and Spring Boot running websockets.

The client-side websocket is unable to connect, giving an error of

'Websocket connection to 'wss://url' failed. The CloseEvent is of code 1006, reason: ''.

However, connecting to the same url on Postman works, both on ws:// and wss://. Any advice?

Answers

If the WebSocket connection is failing with a CloseEvent code of 1006, it typically indicates that the connection was closed abnormally, and the reason for closure is not provided. This can happen due to various reasons, including network issues, server misconfiguration, or errors in the WebSocket implementation.

Here are some steps you can take to troubleshoot and resolve the issue:

  1. Check WebSocket Endpoint Configuration: Ensure that the WebSocket endpoint in your Spring Boot application is correctly configured and accessible. Double-check the URL, port, and any security configurations.

  2. Verify WebSocket URL: Make sure that the WebSocket URL used in your Angular application is correct and matches the WebSocket endpoint URL of your Spring Boot application.

  3. Check Network Configuration: Verify that there are no network issues blocking WebSocket connections. Ensure that the necessary ports (e.g., 443 for wss://) are open and accessible.

  4. Review CORS Configuration: If your Spring Boot application and Angular application are hosted on different domains, ensure that Cross-Origin Resource Sharing (CORS) is configured correctly to allow WebSocket connections.

  5. Check WebSocket Protocol: Ensure that your Spring Boot application supports WebSocket secure (wss://) connections if your Angular application is using wss://. Likewise, ensure that ws:// is supported if your Angular application is using ws://.

  6. Inspect Server Logs: Check the logs of your Spring Boot application for any errors or exceptions related to WebSocket connections. This can provide valuable insights into the root cause of the issue.

  7. Verify SSL Certificate: If your Spring Boot application is using SSL/TLS for secure WebSocket connections (wss://), ensure that the SSL certificate is valid and properly configured.

  8. Test with WebSocket Testing Tools: Use WebSocket testing tools or libraries (e.g., wscat for command-line testing or WebSocket testing libraries for browsers) to manually establish WebSocket connections and debug any issues.

  9. Debug WebSocket Code: Review the WebSocket code in your Angular application and ensure that it is correctly implemented. Use browser developer tools to inspect WebSocket connections, messages, and errors.

  10. Consult Documentation and Community: Refer to the documentation of WebSocket implementations in Angular and Spring Boot for specific troubleshooting tips. Additionally, seek help from online communities or forums where developers can provide assistance and insights.

By following these steps and thoroughly investigating the possible causes of the WebSocket connection failure, you should be able to identify and resolve the issue.

#spring-boot