pydantic mod-wsgi bug

This repository is a minimal reproduction of a bug that occurs when using some pydantic features with mod-wsgi.

This was tested on a Windows machine, with mod-wsgi==4.9.2, Python 3.9.9, apache 2.4.57.0

Also tested with Python 3.11 and bug still exists. Tried also mod_wsgi==5.0.2.

Installation

• Get a Windows apache release from https://www.apachelounge.com/download/
• Place your installation at C:/Apache24

Then, install mod-wsgi (Requires VS build tools):

pip install mod-wsgi==4.9.2

pip install -r requirements.txt

Configure apache

• Open apache24-django.conf and replace APP_ROOT to the absolute path of the wsgi.py folder, e.g:
  DEFINE WSGI_ROOT "C:/your_workspace/pydantic_mod_wsgi_bug/pydantic_mod_wsgi_bug"

• If you don't use python 3.9 run mod_wsgi-express module-config and replace the three lines in apache24-django.conf with the output of the command.

• Start apache server

Run

Try the endpoints with django dev server, where they will all work: python manage.py runserver

• Browse to http://localhost:8000/docs

Then, try the endpoints with apache server, where some of the endpoints will fail:

• Browser to http://localhost/docs The endpoints with string strip and string constraints, will hang, and will actually cause apache to crash.
• (Check apache error.log, you will see the server has crashed and restarted)