zlib

问题 I am trying to decompress a byte array. byte[] bloc = { 120, 156, 211, 97, 144, 76, 247, 142, 98, 228, 98, 0, 2, 70, 101, 6, 166, 8, 16, 131, 133, 131, 145, 129, 209, 134, 129, 133, 1, 44, 12, 4, 202, 118, 12, 0, 70, 22, 2, 148 }; As you can see the header is 120 165 (78 9c in hex) witch is the zlib default Compression algorithme. I used the ComponentAce.Compression.ZipForge from the zlib site. I couldn't find samples on how to unzip streams(not files). 回答1: Use SharpZipLib. It includes a

问题 I'm trying to follow this tutorial on installing Python 3.6.3 and PIP with virtual environments, but when I get to sudo python3.6 get-pip.py I get the error Traceback (most recent call last): File "get-pip.py", line 20061, in <module> main() File "get-pip.py", line 194, in main bootstrap(tmpdir=tmpdir) File "get-pip.py", line 82, in bootstrap import pip zipimport.ZipImportError: can't decompress data; zlib not available but I have zlib1g-dev installed and don't know how to fix this problem. I

问题 I want to use zlib because I'm assuming it's the best & fastest way to gzip NSData . But, is there a better way? If not, which version of the zlib library should I link to in Xcode: libz.dylib, libz.1.dylib, libz.1.1.3.dylib, or libz.1.2.5.dylib? Please provide a code example of how to us zlib to convert NSData *normalHTTPBody into NSData gzippedHTTPBody 回答1: Yes, zlib is what is used to gzip data. I know of no better way. As for speed, you can select the compression level to optimize speed

问题 I'm trying to understand compression in PNG - but I seem to find a lot of contradictory information online ... I would like to understand - how is searching done in the LZ77-part: hash table with linked lists? is this defined in deflate? or implemented in zlib? is there a choice of the search method? - can PNG encoders/decoders set some parameters for the compression (strategy, filter, etc.) or is there a default for PNG? - does the LZ77-part do greedy or lazy evaluation? or is this an option

问题 Is it possible to use the bare minimum zlib available on iPhone to uncompress a zip of a folder. I don't want to go for a open source library, please enlighten me the difficulty or possibility of implementing one piece of code which can uncompress a zip file. 回答1: As JosephH said, you cannot use ZLib to deal with .zip files. But you can use the MiniZip library for that: http://www.winimage.com/zLibDll/minizip.html There's already an Objective-C wrapper, if you don't want to write yours: http:

问题 For some reason, the zlib.deflate filter doesn't seem to be working with socket pairs generated by stream_socket_pair() . All that can be read from the second socket is the two-byte zlib header, and everything after that is NULL. Example: <?php list($in, $out) = stream_socket_pair(STREAM_PF_UNIX, STREAM_SOCK_STREAM, STREAM_IPPROTO_IP); $params = array('level' => 6, 'window' => 15, 'memory' => 9); stream_filter_append($in, 'zlib.deflate', STREAM_FILTER_WRITE, $params); stream_set_blocking($in,

问题 I have the first contiguous 2/3rds of a file that was compressed with zlib's deflate() function. The last 1/3 was lost in transmission. The original uncompressed file was 600KB. Deflate was called multiple times by the transmitter while chopping the original file into chunk sizes of 2KB and passing Z_NO_FLUSH until the end of file when Z_FINISH was passed. The resulting complete compressed file was transmitted, but partially lost as described. Is it possible to recover part of the original

问题 I have this uncompressed byte array: 0E 7C BD 03 6E 65 67 6C 65 63 74 00 00 00 00 00 00 00 00 00 42 52 00 00 01 02 01 00 BB 14 8D 37 0A 00 00 01 00 00 00 00 05 E9 05 E9 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 81 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 05 00 00 01 00 00 00 And I need to compress it using the deflate algorithm (implemented in zlib), from what I searched the equivalent in C# would be using GZipStream but I can't match the compressed

问题 I'm trying to create Python 2.7 virtual env under Python2.6, I'm simply running: virtualenv --python=python27 #python27 correctly leads to my python installation in /opt/python2.7/bin/python Virtualenv fails with following error Traceback (most recent call last): File "/usr/lib/python2.6/site-packages/virtualenv.py", line 17, in <module> import zlib ImportError: No module named zlib This puzzles me because: 1) I clearly do have python zlib module. I can import it easily when I run "import

问题 I've a simple node app that should write metrics from clients. Clients send metrics in json format zipped with python's zlib module, I'm trying to add a middleware to unzip the request post before the express bodyParse takes place. My middlewares are simply the ones provided by express by default: app.configure(function(){ app.set('port', process.env.PORT || 3000); app.set('views', __dirname + '/views'); app.set('view engine', 'jade'); app.use(express.favicon()); app.use(express.logger('dev')