Microsoft KB Archive/255803

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Article ID: 255803

Article Last Modified on 11/21/2006


  • Microsoft Internet Information Services 5.0

This article was previously published under Q255803


This "More Information" section of this article explains the naming convention used when a compressed copy of a file is placed in the temporary folder (also known as the cache directory) of an Internet Information Services computer that has HTTP compression enabled.


Static HTML content is compressed and saved in the temporary directory by using the following naming convention in order to avoid duplicate file names:

  • The file name begins with the following character string: $^~_
  • The compression algorithm (gzip or deflate) followed by an underscore (_) is added next to the file name.
  • Finally, the absolute file path of the file on the local computer is added using an underscore (_) instead of a backslash (\).

For example, if the GZip compression algorithm is used on the Test.htm file, located on the default Web site, the file name of the compressed copy would be the following:


General Information about the Temporary Folder and Compressed Files

When a file has been requested, the compressed copy is stored in a temporary folder and the compressed file is sent when further requests are received. Files are not compressed prior to receiving a request for them.

Note: By default, the temporary folder is C:\WINNT\IIS Temporary Compressed Files. This is specified on the Service tab in the WWW Service Master Properties for ComputerName dialog box in the IIS snap-in.

Additional query words: iis 5 compression scheme method filename akz

Keywords: kbinfo KB255803