Fix Error Running From IIS on Windows #349
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When running Pyppeteer under windows via IIS, it fails because the AppDirs scan happens regardless of whether the PYPPETEER_HOME environment variable is set or not:
`from pyppeteer import launch` triggers the following Exception:
File "C:\apps\sdk\python\Python38\lib\site-packages\pyppeteer\__init__.py", line 27, in <module>
__pyppeteer_home__ = os.environ.get('PYPPETEER_HOME', AppDirs('pyppeteer').user_data_dir) # type: str
File "C:\apps\sdk\python\Python38\lib\site-packages\appdirs.py", line 419, in user_data_dir
return user_data_dir(self.appname, self.appauthor,
File "C:\apps\sdk\python\Python38\lib\site-packages\appdirs.py", line 81, in user_data_dir
path = os.path.normpath(_get_win_folder(const))
File "C:\apps\sdk\python\Python38\lib\site-packages\appdirs.py", line 481, in _get_win_folder_with_pywin32
dir = shell.SHGetFolderPath(0, getattr(shellcon, csidl_name), 0, 0)
pywintypes.com_error: (-2147024891, 'Access is denied.', None, None)
~end_err~
Reason for failure: The System user used by IIS (IIS_IUSRS) does not have a user_data_dir.
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When running
Pyppeteerunder windows via IIS, it fails because theAppDirsscan happens regardless of whether thePYPPETEER_HOMEenvironment variable is set or not:from pyppeteer import launchtriggers the following Exception:Reason for failure: The System user used by IIS does not have a
user_data_dir. This issue will likely occur for other system processes under windows.