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copied!<h2>UPDATE: Browsers have been dropping support for raw deflate. zOompf has completed some very thorough research on this very topic <em><a href="http://zoompf.com/blog/2012/02/lose-the-wait-http-compression" rel="nofollow noreferrer">here</a>.</em> Unfortunately, it appears that raw deflate is NOT safe to use.</h2> <hr> <p><strike>Check <a href="http://www.vervestudios.co/projects/compression-tests/results" rel="nofollow noreferrer">http://www.vervestudios.co/projects/compression-tests/results</a> for more results.</strike></p> <p><strike> Here are the browsers that have been tested:</p> <pre><code>/* Browser DEFLATE ZLIB */ XP Internet Explorer 6 PASS FAIL XP Internet Explorer 7 PASS FAIL XP Internet Explorer 8 PASS FAIL Vista Internet Explorer 8 PASS FAIL XP Firefox 3.6.* PASS PASS XP Firefox 3.5.3 PASS PASS XP Firefox 3.0.14 PASS PASS Win 7 Firefox 3.6.* PASS PASS Vista Firefox 3.6.* PASS PASS Vista Firefox 3.5.3 PASS PASS XP Safari 3 PASS PASS XP Safari 4 PASS PASS XP Chrome 3.0.195.27 PASS PASS XP Opera 9 PASS PASS XP Opera 10 PASS PASS XP Sea Monkey 1.1.8 PASS PASS Android 1.6 Browser (v4)* N/A N/A OS-X Safari 4 PASS PASS OS X Chrome 7.0.517.44 PASS PASS OS X Opera 10.63 PASS PASS iPhone 3.1 Safari PASS PASS </code></pre> <p><em>* Android Sends HTTP request header "Accept-Encoding: gzip". Deflate is not permitted.</em></p> <p><br /> I conclude that we can <strong>always send <em>raw</em> DEFLATE</strong> (when the HTTP request header "Accept-Encoding" contains "deflate") and the browser will be able to correctly interpret the encoded data. Can someone prove this wrong?</p> <p><em>note: .NET's native implementation of DEFLATE (System.IO.Compression.DeflateStream) is raw DEFLATE. It also sucks. Please use <a href="http://www.componentace.com/zlib_.NET.htm" rel="nofollow noreferrer">zlib.net</a> for all of your .NET deflating needs.</em></strike></p>

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