compression

问题 I want to compress a string in PHP and write it to a file without using the gzwrite function as I want to store the actual compressed string in a database first, but I am unsure as whether to use gzcompress , gzencode or gzdeflate as it's not very clear. Any ideas? Edit: the already compressed string will be written into a *.gz file from the database so it has to be compatible. 回答1: Use gzcompress if you just want to compress the string. gzencode will also add gzip file headers so it can be

问题 I'm attempting to zip a folder containing subfolders and items, using Windows shell CopyHere command: https://msdn.microsoft.com/en-us/library/windows/desktop/bb787866(v=vs.85).aspx https://msdn.microsoft.com/en-us/library/windows/desktop/ms723207(v=vs.85).aspx Update: Note, prefer a native solution-- this is for a distributed Excel VBA tool, so bundling 3rd-party files is not ideal. And, need synchronous compression. I can easily add a folder and its contents to the zip: oShell.Namespace

问题 I am working on following scenario: Generate private and public key Generate compressed public key with: PublicKey.AccessGroupParameters().SetPointCompression(true) Sign some data and send to other end with compressed public key. [At other end] verify signature using public key For step 4, I need recover y value. Is there some API I can use among Crypto++? 回答1: For step 4, I need recover y value. Is there some API I can use among Crypto++? During verification, you will load the persisted or

问题 I have been working on improving performance on my Wordpress site, one of the things I have done, I switched to dynamic delivery of CSS and JS files (so they are compressed by PHP), which worked very well for performance tests, it seems as though firefox is throwing some errors but the website loads. Now, I have ALSO added this to the .htaccess in my JS and CSS folder (wp-incldues) on a wordpress site: <filesMatch "\.(js|css)$"> Header set Content-Encoding x-deflate # Header set Content

问题 I have $ lsb_release -a LSB Version: :base-4.0-amd64:base-4.0-noarch:core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarch Distributor ID: CentOS Description: CentOS release 6.6 (Final) Release: 6.6 Codename: Final $ ls -l /lib64/libbz2.so.1 lrwxrwxrwx. 1 root root 15 May 25 2016 /lib64/libbz2.so.1 -> libbz2.so.1.0.4 I did: Python-2.7.12 $ export LDFLAGS="-L/lib64"; ./configure --prefix=/some/dir Python-2.7.12 $ make And got: Python build

问题 I am working on a site that will have a video on it. I am using HTML5 with a flash fallback and am hosting the video on the site (the client does not want to use Vimeo, YouTube, etc.). The video is a little over 4 minutes long and I have compressed the video down to 12.7MB for the mp4 format and around 23MB for webm and ogv. Are these file sizes too large? I can maybe get them smaller, but the quality really suffers. I also have the entire Adobe Creative Suite, so if someone has a good way to

问题 I'm using org.apache.commons.compress.compressors.deflate.DeflateCompressorInputStream; and error invalid distance too far back is occured. I don't know what this error means. Exists some documentation for that ? Or any solution how to repair that. 回答1: It means that the input is either corrupted, or that it isn't deflate compressed data in the first place. 来源： https://stackoverflow.com/questions/47635034/invalid-distance-too-far-back

问题 My project contains a Sender/Receiver framework that can only talk one-way , there is no a return channel from the receiver to the sender. The sender compress part of the data it's send to the receiver using zlib. I want to make my receiver resilient to crashes/reboots/restarts, is it possible to join the zlib stream from a random point somehow? Both Sender/Receiver using Z_SYNC_FLUSH. Some ideas I had: Saving state structures to disk and reload them after restart of the receiver. Replacing Z

问题 I want to use the YUI Compressor on JavaScript files that contain PHP code like for example: <?php $include 'headerDefinitions.js.php'; ?> function hello(name) { alert('Hello ' + name); } hello('<?= $_GET["name"] ?>'); This obviously throws some errors when running through yui compressor like this: java -jar yui-compressor.jar --type js -o target-file.js.php source-file.js.php because the compressor assumes even the PHP part is JavaScript. Is there a way to compress the JavaScript while

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 4 years ago . I am looking for a .NET dictionary based compression library, something that would allow me 'seed' it with a large list / string of common words which it would use to build its dictionary. The reason that I want this over LZMA and the like is because I want to independently compress short strings, all of which