Cannot obtain socket from WSGI environment.

[anand-lyn]

Question 1: What is the problem?
I used flask flask-sock to set up a websocket service and passenger was able to run it successfully, but the client would report an error when establishing a websocket connection, and the http request was normal
RuntimeError: Cannot obtain socket from WSGI environment.

Question 2: Passenger version and integration mode:
open source 6.0.22 standalone

Question 3: OS or Linux distro, platform (including version):
FreeBSD 14.1-RELEASE

Question 4: Passenger installation method:
source tarball

Question 5: Your app's programming language (including any version managers) and framework (including versions):
Python3.11, flask, flask-sock

Question 6: Are you using a PaaS and/or containerization? If so which one?
No

Question 7: Anything else about your setup that we should know?
No