Isapi-wsgi

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Replicate ecb server varible HTTPS in wsgi environment so Trac and Mercurial can use isapi_wsgi over https.

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Make manipulation of ECB server variable APPL_MD_PATH case insensitive as string case appears to
be IIS version/installation dependent.

Add serving from IIS root example - examples\demo_serve_from_root.py

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Improved virtual directory support:

Application can now be deployed to any level of the IIS directory structure including the root.

SCRIPT_NAME is now set properly (to the app root if it's a `*`-mapped script handler)

Added Python 3.0 compatibility

First release to PyPI

Set IIS REMOTE_ADDR env variable as part of WSGI environment.

Add optional size argument to wsgi.input's readline(). This is not part of WSGI spec, but stdlib
cgi.py now requires it.

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Apply Chris Lambacher's first set of patches:

ISAPISimpleHandler creates handler object per request.

ISAPIThreadPoolHandler where the wsgi requests are run on worker threads from the thread pool.

App now serves from VirtualDirectory root by default.

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Added qwip_test.py as an example for running quixote apps via QWIP.

Update README.txt to reflect new example.

Added basic error handling to cope with Extension Errors that are generated
when a client disconnects before the extension i/o has finished.

Reset self.headers and self.headers_sent in HttpExtensionProc so wsgi states are
correct if Extension Error occurred in previous call.

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Change write method so it uses ecb.WriteClient rather than print redirection
which was causing an Extension Error when running QWIP apps.