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Why is my Go WebSocket failing with Apache's mod_proxy_wstunnel (403/400 Errors)?

Linda Hamilton

Jan 05, 2025 pm 12:16 PM

Why is my Go WebSocket failing with Apache's mod_proxy_wstunnel (403/400 Errors)?

Troubleshooting WebSocket behind Apache with mod_proxy_wstunnel

This question aims to troubleshoot issues when using go-websocket behind Apache with mod_proxy_wstunnel. The author encountered 403 Forbidden and 400 Bad Request errors when attempting to connect via the WebSocket.

To resolve the problem, the author followed these steps:

Trailing slash added to the WebSocket path: According to Aralo, adding a trailing slash to the WebSocket path is crucial for Apache to recognize it as a GET request.
Correct order of ProxyPass directives: As James Henstridge suggested, the ProxyPass directive specific to the WebSocket path must be placed before the root ProxyPass directive.
Removing origin check: The go-websocket Chat example code contains an origin check in the ServeWs() function that was preventing the connection. This check was removed.

After implementing these changes, the author reports that the WebSocket is now working as expected.

Additionally, reading Apache logs, as recommended by covener, can provide valuable insights into the issue.

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