John Reiser explained on comp.compression: For the dictionary: make a histogram of short substrings, sort by payoff (number of occurrences times number of bits saved when compressed) and put the highest-payoff substrings into the dictionary. For example, if k is the length of the shortest substring that can be compressed (usually 3==k or 2==k), then … Read more
After all this time, I finally found a solution to this problem! None of the answers above helped me, as promising as they all looked. In the end, I was able to compress the string on the server with gzip using the chilkat framework for .net … and then decompress it on the iphone using … Read more
I found the answer. You can change the code to: var request = (HttpWebRequest)HttpWebRequest.Create(requestUri); request.AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate; And you will have automatic decompression. No need to change the rest of the code.
UPDATE: Browsers have been dropping support for raw deflate. zOompf has completed some very thorough research on this very topic here. Unfortunately, it appears that raw deflate is NOT safe to use. Check http://www.vervestudios.co/projects/compression-tests/results for more results. Here are the browsers that have been tested: /* Browser DEFLATE ZLIB */ XP Internet Explorer 6 PASS … Read more
Something like the following will print the raw content, including the “$type $length\0” header: perl -MCompress::Zlib -e ‘undef $/; print uncompress(<>)’ \ < .git/objects/27/de0a1dd5a89a94990618632967a1c86a82d577
For anyone coming across this in recent times, the request library supports gzip decompression out of the box now. Use as follows: request( { method: ‘GET’ , uri: ‘http://www.google.com’ , gzip: true } , function (error, response, body) { // body is the decompressed response body console.log(‘server encoded the data as: ‘ + (response.headers[‘content-encoding’] || … Read more
Why use deflate instead of gzip for text files served by Apache? The simple answer is don’t. RFC 2616 defines deflate as: deflate The “zlib” format defined in RFC 1950 in combination with the “deflate” compression mechanism described in RFC 1951 The zlib format is defined in RFC 1950 as : 0 1 +—+—+ |CMF|FLG| … Read more