Error running y4web with nssm

[Paolo Berto]

Hello all,

I am trying to run py4web as a service on windows using nssm, but at startup on stderror the program gives the following errors:

Traceback (most recent call last):
  File "C:\Program Files\Python310\lib\runpy.py", line 196, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "C:\Program Files\Python310\lib\runpy.py", line 86, in _run_code
    exec(code, run_globals)
  File "C:\Program Files\Python310\Scripts\py4web.exe\__main__.py", line 7, in <module>
  File "C:\Program Files\Python310\lib\site-packages\click\core.py", line 1128, in __call__
    return self.main(*args, **kwargs)
  File "C:\Program Files\Python310\lib\site-packages\click\core.py", line 1053, in main
    rv = self.invoke(ctx)
  File "C:\Program Files\Python310\lib\site-packages\click\core.py", line 1659, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "C:\Program Files\Python310\lib\site-packages\click\core.py", line 1395, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "C:\Program Files\Python310\lib\site-packages\click\core.py", line 754, in invoke
    return __callback(*args, **kwargs)
  File "C:\Program Files\Python310\lib\site-packages\py4web\core.py", line 1919, in run
    click.secho(ART, fg="blue")
  File "C:\Program Files\Python310\lib\site-packages\click\termui.py", line 659, in secho
    return echo(message, file=file, nl=nl, err=err, color=color)
  File "C:\Program Files\Python310\lib\site-packages\click\utils.py", line 298, in echo
    file.write(out)  # type: ignore
  File "C:\Program Files\Python310\lib\encodings\cp1252.py", line 19, in encode
    return codecs.charmap_encode(input,self.errors,encoding_table)[0]
UnicodeEncodeError: 'charmap' codec can't encode characters in position 2-8: character maps to <undefined>

When the service is active py4web does not work and no page is reachable.

Does anyone have any helpful suggestions on how to fix this problem?

Regards

Paolo

[Nico Zanferrari]

Hi,

I've tried the pythoncom instructions, but I have the same problem, too!

Anyhow, don't ask me why this happens, but I've found a simple workaround at the problem. Use NSSM and configure the service to run a CMD like this:

start "py4web" "C:\Program Files\Python310\Scripts\py4web.exe" run apps
pause

Note that both the START and the PAUSE command are needed. I think that Windows 10 kill all the process unless the starting CMD is kept alive with the PAUSE.... 

Nico

Il giorno dom 9 gen 2022 alle ore 23:23 Nico Zanferrari <nico...@gmail.com> ha scritto:

Hi Paolo,

it seems you're using Windows and python 3.10 (installed for all users in C:\Program Files\Python310. Also, you've pip-installed py4web.

I've tried with python 3.10.1 and the latest nssm binary with a CMD as the starting program. Unfortunately I've exactly the same problem and I'm not able to resolve it ;-(

I've also tried by configuring the service to run py4web.exe and even python.exe but nothing changes.

Maybe using nssm was not a good idea... Has anyone tried the pythoncom libraries (https://stackoverflow.com/a/32440/14104572) ?

nico

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[Paolo Berto]

I also tried FireDaemon Pro, but the result is the same.
Same output on stderr.

Paolo

[Paolo Berto]

Great Nico, as a batch file on windows 11 it works, tomorrow I will try it on windows server too.

It would be anyway a good thing if the windows installation includes also a version for use as a service without using nssm or similar.

Paolo