What determines which encoding mod_wsgi uses when it reads WSGI scripts:
Apache's configured locale (which for me is en_us.UTF8), or something
else? (I ask about this because mod_wsgi appears to do low-level manual
hackery when reading wsgi script files instead of going through importlib
or runpy, which means that it can't handle a zipapp or even something that
uses a PEP 263 magic comment to convey encoding information, the latter
making it impossible to "wrap" a zipapp with a loader shim even unless
something else gives.)
Minimized example (works when you run it using python3 breaks.py, breaks
with the errors below if you try to load it using `mod_wsgi-express
start-server breaks.py` using a mod_wsgi-express installed into a venv with
pip install), note that you will have to save breaks.py as
latin1/iso-8859-1 to cause this to break):
$ cat breaks.py
# coding: latin1
import sys
from wsgiref.simple_server import make_server
def application(environ, start_response):
start_response('200 OK', [('Content-Type', 'text/plain')])
message = 'It works!\n'
version = 'Python v' + sys.version.split()[0] + '\n'
response = '\n'.join([message, version])
return [response.encode()]
def main():
with make_server('', 8100, application) as httpd:
httpd.serve_forever()
blow_up_unicode = 'â(¡' # \xe2\x28\xa1
if __name__ == '__main__':
main()
Errors it generates when run under mod_wsgi-express:
[Thu Mar 21 20:12:56.942439 2024] [wsgi:error] [pid 3288289:tid
140356515776384]
mod_wsgi (pid=3288289): Failed to exec Python script file
'/tmp/mod_wsgi-localh
ost:8000:1000/handler.wsgi'.
[Thu Mar 21 20:12:56.942486 2024] [wsgi:error] [pid 3288289:tid
140356515776384]
mod_wsgi (pid=3288289): Exception occurred processing WSGI script
'/tmp/mod_wsg
i-localhost:8000:1000/handler.wsgi'.
[Thu Mar 21 20:12:56.943223 2024] [wsgi:error] [pid 3288289:tid
140356515776384] Traceback (most recent call last):
[Thu Mar 21 20:12:56.943329 2024] [wsgi:error] [pid 3288289:tid
140356515776384] File "/tmp/mod_wsgi-localhost:8000:1000/handler.wsgi",
line 90, in <module>
[Thu Mar 21 20:12:56.943335 2024] [wsgi:error] [pid 3288289:tid
140356515776384] handler =
mod_wsgi.server.ApplicationHandler(entry_point,
[Thu Mar 21 20:12:56.943337 2024] [wsgi:error] [pid 3288289:tid
140356515776384]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[Thu Mar 21 20:12:56.943345 2024] [wsgi:error] [pid 3288289:tid
140356515776384] File
"/home/lucas/wsgizip/lib/python3.11/site-packages/mod_wsgi/server/__init__.py",
line 1475, in __init__
[Thu Mar 21 20:12:56.943348 2024] [wsgi:error] [pid 3288289:tid
140356515776384] code = compile(fp.read(), entry_point, 'exec',
[Thu Mar 21 20:12:56.943350 2024] [wsgi:error] [pid 3288289:tid
140356515776384] ^^^^^^^^^
[Thu Mar 21 20:12:56.943356 2024] [wsgi:error] [pid 3288289:tid
140356515776384] File "<frozen codecs>", line 322, in decode
[Thu Mar 21 20:12:56.943371 2024] [wsgi:error] [pid 3288289:tid
140356515776384] UnicodeDecodeError: 'utf-8' codec can't decode byte 0xe2
in position 458: invalid continuation byte
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