Issue with SSE and fcgiwrap in nginx (RESTCONF)

[Rostyslav Zalevskyy]

Hi Sergey,

Thank you for the prompt reply!

On Wed, May 14, 2025 at 2:31 AM Sergey A. Osokin <osa at freebsd.org.ru> wrote:

>
> [...]
>
> Is there a chance to build nginx with a debugging log as described on
> the following page, https://nginx.org/en/docs/debugging_log.html
> and tracing fcgi requests.  Please expect a lot of messages in
> the nginx error.log file.
>

I'm sharing the requested logs as attachments:
- restconf_nginx_error.log
- restconf_nginx_access.log
- terminal.log
- restconf-test.sh (a test script for reproducing the issue)

I would also like to share the steps to reproduce the issue:

Steps to reproduce:

1. I created a simple script with an infinite loop, see attached
*restconf-test.sh*

2. in the previously attached *NGINX-restconf* conf file , update *line 33*
to specify the full path to the restconf-test.sh
fastcgi_param           SCRIPT_FILENAME /YOUR_REAL_PATH_TO/restconf-test.sh;

3. Restart nginx and run this in the first terminal:
*curl -v http://localhost/restconf/streams
<http://localhost/restconf/streams>*
4. Then run the same command in a second terminal: *curl -v
http://localhost/restconf/streams <http://localhost/restconf/streams>*

At this point, the second connection hangs until the first one is closed.

Let me know if you need anything else to help with debugging.

Thank you,
-Rostyslav
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