Fixed several worker process crash bugs for improved stability in edge cases.
Fixed bug with chunked encoding files of a certain size.
Changes in version 3.8.4 (3/2008):
Improved third party filter compatibility, especially under high Web request load.
Fixed installation timing issue that could cause failed installations on certain systems.
Fixed a bug in the reporting mechanism that could cause worker process crashes and adversely affect performance, even when not requesting an httpZip report directly.
Fixed a bug in the settings reload mechanism that could cause a worker process crash when a settings change is made under high Web request load.
Changes in version 3.8 (5/2007):
Added compatibility with latest Microsoft ASP.NET AJAX framework.
Added enhanced compatibility features with third-party ISAPI Filters.
Fixed various UI and filter bugs.
Changes in version 3.7 (11/2006):
Added default support for PDF and PNG file compression.
Added optimization to handle small and large Ajax files for better performance.
Added compatibility with the Windows Server 2003/IIS 6 kernel-mode cache (ISAPI filter will not interfere with kernel-mode cache operation).
Fixed various HTML-based reporting bugs.
Enhanced core ISAPI code for improved efficiency in CPU utilization and memory management.
Changes in version 3.6 (7/2006):
Enhanced debugging code for third-party compatibility and better diagnostics performance under higher loads.
Added feature to sort virtual servers/sites alphabetically in Settings Manager.
Improved third party compatibility with Java application servers and other ISAPI filters, including CacheRight.
Enhanced core ISAPI code for improved efficiency in CPU utilization and memory management.
Changes in version 3.5 (8/2005):
Added support for the Akamaizer ISAPI filter.
Added support for Tomcat with IIS connector.
Added ability to import/export settings.
Added option for caching compressed streamed and chunked data.
Added deflate-only option.
Replace disk logging with in-memory logging.
Enhanced diagnostic features.
Extended in-page directives.
Added support for decompression on clients running Norton Internet Security third party software.
Redesigned Reporting tab with option to link directly to Web-based httpZip reports (added in 10/2005 update).
Added option to restrict access to Web-based reports by IP address (added in 10/2005 update).
Changes in version 3.1 (4/2005):
Code path optimizations, including bug fix for memory issue in the case of streamed content.
Added detailed exclusion configuration for compression cache.
Added specific exclusion mechanism for HTTP 1.0 user agents (browsers and proxies).
Added specific exclusion mechanism for HTTP 1.1 proxies.
Removed httpZip tab from MMC (access tool via Start menu in Programs).
Changes in version 3.0 (3/2005):
New tab-based Settings Manager.
Configurable default settings for new sites.
Numerous improvements in request handling process to minimize memory and CPU utilization and improve throughput and stability.
In-memory compressed content cache.
Enhanced dynamic caching with cache-by-cookie.
Revised default browser exceptions for better safety/savings trade-off.
Improved accuracy of Web-based reporting.
Changes in version 2.0 (10/2004):
Improved handling of compression for streaming and chunked transfer encoded content.
Added compatibility with IIS 6.0 on Windows Server 2003 and other systems.
Browser compatibility checking rules updated.
Redesigned, more performant white space and comments removal.
Streamlined UI for easier administration, including renaming and reordering of controls.
Revised default settings based on customer feedback, including default support for IBM WebSphere backend server compression, revised default compression file size range for maximum performance, and logging and caching (and related automated folder creation on install) are turned off by default.
General performance and stability enhancements.
Changes in version 1.6 (8/2003):
Improved configuration reading process to eliminate the need for server restarting after settings are adjusted.
Corrected erratic logging bug.
Improved installation script.
Changes in version 1.5 (6/2003):
Rearchitected mechanism for persisting configuration settings to improve efficiency of filter loading.
Removed exceptional code path for first-request handling to enable compression and logging on first request after restart with all file types.
Restored POST response compression temporarily disabled in prior version.
Changes in version 1.4 (4/2003):
Added ability for cache folder creation mechanism to accept dot in path.
Fixed minor white space removal bug (side effect of checking for end of tag without requiring closing of open quote of attribute value).
Fixed wrong response code for online report page and slightly altered report request handling for more consistent initial loading of report template.
Fixed minor typographical inconsistencies on report template.
Removed inadvertent handling of non-entity-bearing responses that were causing inaccurate and occasionally negative values in log files and reports.
Changes in version 1.3.8 (4/2003):
Changes for greater accuracy and stability in reporting mechanism.
Changes in version 1.3.5 (4/2003):
Introduced programmatic metabase ordering to resolve ServerMask compatibility issue.
Changes in version 1.3.1 (3/2003):
Various changes to improve performance and stability.
Fixed incorrect display of uncompressed size in reports due to logging anomaly.
Fixed problem with multiple entries in exclude list causing instability and unpredictable results.
Fixed Accept-Encoding Exception control in MMC property sheet.
Added horizontal scroll to Exclusion sub-dialog in MMC property sheet.
Changes in version 1.3 (3/2003):
Restored file extension list for overriding compression level of dynamic pages.
Revised code path for static files larger than maximum compressible size to increase performance.
Fixed intermittent instability due to large log file size.
Fixed interoperability problem with CacheRight.
Fixed reporting anomalies due to inconsistent inclusion of HTTP headers in log fields.
Fixed bug preventing white space removal in XHTML files.
Changes in version 1.2 (2/2003):
Revised compressed content caching defaults to avoid session swapping.
Added editable file extension list for compressed content caching.
Fixed intermittent service restart problem.
Fixed intermittent problem with integrated white space removal.
Changed default setting for Accept-Encoding Exception toggle from on to off.
Fixed problem with POST responses.
Fixed problem with ASPX redirects.
Fixed variety of client- and server-side problems with Web-based reporting mechanism.
Removed file extension list for compression level.
Made httpZip impact IIS transaction logs.
Updated documentation.
Fixed problem affecting new site creation.
Changes in version 1.1.1 (12/2002):
Fixed minor UI problems with Help and Buy Now / About buttons.
Changes in version 1.1.0 (12/2002):
Added compression support for ASP on NT Server 4.0, and for Cold Fusion, PHP (CGI mode) and ActiveState Perl (CGI and ISAPI modes) on both NT 4.0 and Windows 2000 Server (Note: also supports ASP on Windows 2000 Server).
Added minimum and maximum size limit settings for excluding very large and very small files from compression.
