deflate

问题 I have a web-service running on Windows Azure which returns JSON that I consume in my iPhone app. Unfortunately, Windows Azure doesn't seem to support the compression of dynamic responses yet (long story) so I decided to get around it by returning an uncompressed JSON package, which contains a compressed (using GZIP) string. e.g {"Error":null,"IsCompressed":true,"Success":true,"Value":"vWsAAB+LCAAAAAAAB..etc.."} ... where value is the compressed string of a complex object represented in JSON.

问题 By stating Features: no 4GB limit ... Idzip just uses multiple gzip members to have no file size limit. the author of idzip seems to imply that multiple gzip members are necessary to support data > 4GB. But the deflate algorithm, whose output gzip members merely wrap with header and footer, evidently supports more than 4GB of input. So is it really necessary to use multiple gzip members to compress more than 4GB of data? 回答1: Even .net's GZipStream , which does not support multiple members

问题 I use javafx WebView in my project and it began crash at one website. Through debug i understood, that when page receives part of js-code server uses header "Content-Encoding:deflate", ignoring my request headers. Main problem in inflate method of InflaterInputStream. java.util.zip.ZipException: incorrect header check at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:164) I reproduced this error in simple method: public byte[] makeTestRequest(String url) throws Exception {

问题 I have a CGI application in C that creates an html page by saving a char* as a html page: void saveTextFile(const char *filename, const char *str){.......} called as saveTextFile("..\\index.html",outputFile); How do I use zlib to take as input the "outputFile" char array and output a zipped html page with appropriate headers? Would the gzopen be used here instead of my saveTextFile function? Any advice is appreciated. Thanks. 回答1: Got it - //***************************************************

问题 Hello all I want to make a filter for tomcat to deflate all responces of certain MIME type. Any guidelines? ... String ae = request.getHeader("accept-encoding"); if (ae != null && ae.indexOf("deflate") != -1) { deflate response...????? } chain.doFilter(request, res); 回答1: Don't do that in a homebrewed Filter . Configure it at server level. In case of for example Apache Tomcat, just add compression="on" to <Connector> element in /conf/server.xml . It will GZIP responses whenever client accepts

问题 I have a dump after java.util.zip.Deflater (can confirm it's valid because Java's Inflater opens it fine) and need to open it in .NET: byte[] content = ReadSample(sampleName); var input = new MemoryStream(content); var output = new MemoryStream(); using (var z = new System.IO.Compression.DeflateStream(input, CompressionMode.Decompress, true)) z.CopyTo(output); This throws System.IO.InvalidDataException : Block length does not match with its complement. Tried Ionic.Zlib.DeflateStream - similar

问题 Looking for an alternative compression java library to Apache Commons Compress (https://commons.apache.org/proper/commons-compress/). Commons Compress throws an error when trying to read a zip entry that was compressed using "ENHANCED_DEFLATED" which is deflate64. Here is sample excerpt that throws the exception. public void doRecurseZip(File inputFile) throws IOException{ ZipFile srcZip = null; srcZip = new ZipFile(inputFile); final Enumeration<ZipArchiveEntry> entries = srcZip.getEntries();

问题 Hi this is my first Question :) I need a lib or way to compress a data in asp.net (vb) with the algorit deflate but the result inflate in javascript. I'm use a lib in javascript: deflate.js hxxp://www.codeproject.com/KB/scripting/Javascript_binaryenc.aspx?msg=2904739 First i'm deflate and convert to base64 the result but the result is no compatible with the javascript lib. i'm use the Chilkat .NET DLL hxxp://www.example-code.com/vbdotnet/deflate_string.asp The String result with this lib is

问题 I know that okhttp3 library by default it adds the header Accept-Encoding: gzip and decodes the response automatically for us. The problem I'm dealing with a host that only accepts a header like: Accept-Encoding: gzip, deflate if I don't add the deflate part it fails. Now when I manually add that header to okhttp client, the library doesn't do the decompression anymore for me. I've tried multiple solutions to take the response and try to manually decompress that but I've always ended up with

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