win32/hgwebdir_wsgi: use getattr instead of hasattr

contrib/win32/hgwebdir_wsgi.py

@@ -1,95 +1,95 b''
 # An example WSGI script for IIS/isapi-wsgi to export multiple hgweb repos
 # Copyright 2010 Sune Foldager <[e-mail]>
 #
 # This software may be used and distributed according to the terms of the
 # GNU General Public License version 2 or any later version.
 #
 # Requirements:
 # - Python 2.6
 # - PyWin32 build 214 or newer
 # - Mercurial installed from source (python setup.py install)
 # - IIS 7
 #
 # Earlier versions will in general work as well, but the PyWin32 version is
 # necessary for win32traceutil to work correctly.
 #
 #
 # Installation and use:
 #
 # - Download the isapi-wsgi source and run python setup.py install:
 #   http://code.google.com/p/isapi-wsgi/
 #
 # - Run this script (i.e. python hgwebdir_wsgi.py) to get a shim dll. The
 #   shim is identical for all scripts, so you can just copy and rename one
 #   from an earlier run, if you wish.
 #
 # - Setup an IIS application where your hgwebdir is to be served from.
 #   On 64-bit systems, make sure it's assigned a 32-bit app pool.
 #
 # - In the application, setup a wildcard script handler mapping of type
 #   IpsapiModule with the shim dll as its executable. This file MUST reside
 #   in the same directory as the shim. Remove all other handlers, if you wish.
 #
 # - Make sure the ISAPI and CGI restrictions (configured globally on the
 #   web server) includes the shim dll, to allow it to run.
 #
 # - Adjust the configuration variables below to match your needs.
 #
 
 # Configuration file location
 hgweb_config = r'c:\src\iis\hg\hgweb.config'
 
 # Global settings for IIS path translation
 path_strip = 0   # Strip this many path elements off (when using url rewrite)
 path_prefix = 1  # This many path elements are prefixes (depends on the
                  # virtual path of the IIS application).
 
 import sys
 
 # Adjust python path if this is not a system-wide install
 #sys.path.insert(0, r'c:\path\to\python\lib')
 
 # Enable tracing. Run 'python -m win32traceutil' to debug
-if hasattr(sys, 'isapidllhandle'):
+if getattr(sys, 'isapidllhandle', None) is not None:
     import win32traceutil
 
 # To serve pages in local charset instead of UTF-8, remove the two lines below
 import os
 os.environ['HGENCODING'] = 'UTF-8'
 
 
 import isapi_wsgi
 from mercurial import demandimport; demandimport.enable()
 from mercurial.hgweb.hgwebdir_mod import hgwebdir
 
 # Example tweak: Replace isapi_wsgi's handler to provide better error message
 # Other stuff could also be done here, like logging errors etc.
 class WsgiHandler(isapi_wsgi.IsapiWsgiHandler):
     error_status = '500 Internal Server Error' # less silly error message
 
 isapi_wsgi.IsapiWsgiHandler = WsgiHandler
 
 # Only create the hgwebdir instance once
 application = hgwebdir(hgweb_config)
 
 def handler(environ, start_response):
 
     # Translate IIS's weird URLs
     url = environ['SCRIPT_NAME'] + environ['PATH_INFO']
     paths = url[1:].split('/')[path_strip:]
     script_name = '/' + '/'.join(paths[:path_prefix])
     path_info = '/'.join(paths[path_prefix:])
     if path_info:
         path_info = '/' + path_info
     environ['SCRIPT_NAME'] = script_name
     environ['PATH_INFO'] = path_info
 
     return application(environ, start_response)
 
 def __ExtensionFactory__():
     return isapi_wsgi.ISAPISimpleHandler(handler)
 
 if __name__=='__main__':
     from isapi.install import *
     params = ISAPIParameters()
     HandleCommandLine(params)