mod_haydn is an Apache module which allows
developers to write Apache modules using the
Microsoft .NET platform by running compiled MSIL
bytecodes natively in Apache, and providing a
full interface to Apache's filter and module APIs.
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New Header Parsing, Request Logging, MIME Type Parsing, and Prerun callbacks were added to the module source code. The Apache 1.3 module is now pretty much full-featured with only a few API calls missing.