zlib

问题 Lets say I have 2 individually gziped html chunks in memory. Can I send chunk1+chunk2 to HTTP client? Does any browser supports this? Or there is no way to do this and I have to gzip the whole stream not individual chunks? I want to serve to clients for example chunk1+chunk2 and chunk2+chunk1 etc (different order) but I don't want to compress the whole page every time and I dont want to cache the whole page. I want to use precompressed cached chunks and send them. nodejs code (node v0.10.7):

问题 Lets say I have 2 individually gziped html chunks in memory. Can I send chunk1+chunk2 to HTTP client? Does any browser supports this? Or there is no way to do this and I have to gzip the whole stream not individual chunks? I want to serve to clients for example chunk1+chunk2 and chunk2+chunk1 etc (different order) but I don't want to compress the whole page every time and I dont want to cache the whole page. I want to use precompressed cached chunks and send them. nodejs code (node v0.10.7):

问题 I'm looking for a wrapper that distills zlib to: OpenZipFile() GetItemInfo(n) UnzipItem(n) // Bonus points for unzipping recursively if item n is a directory. I see a lot of wrappers around the zlib library on, say, codeproject.com but they are all platform-specific in order to provide the added platform-specific functionality of unzipping to file/memory buffer/pipe. 回答1: In boost::iostreams there is the possibility to use zlib, gzip and bzip2 formats. You find it from http://www.boost.org/

问题 My company uses a legacy file format for Electromiography data, which is no longer in production. However, there is some interest in maintaining retro-compatibility, so I am studying the possibility to write a reader for that file format. By analyzing a very convoluted former source code written in Delphi, the file reader/writer uses ZLIB, and inside a HexEditor it looks like there is a file header in binary ASCII (with fields like "Player", "Analyzer" readily readable), followed by a

问题 I am using zlib to compress a stream of text data. The text data comes in chunks, and for each chunk, deflate() is called, with flush set to Z_NO_FLUSH . Once all chunks have been retrieved, deflate() is called with flush set to Z_FINISH . Naturally, deflate() doesn't produce compressed output on each call. It internally accumulates data to achieve a high compression rate. And that's fine! Every time deflate() produces compressed output, that output is appended to a database field - a slow

问题 I have an archive.zip which contains two crypted ".txt" files. I would like to decompress the archive in order to retrieve those 2 files. Here's what I've done so far: FILE *FileIn = fopen("./archive.zip", "rb"); if (FileIn) printf("file opened\n"); else printf("unable to open file\n"); fseek(FileIn, 0, SEEK_END); unsigned long FileInSize = ftell(FileIn); printf("size of input compressed file : %u\n", FileInSize); void *CompDataBuff = malloc(FileInSize); void *UnCompDataBuff = NULL; int fd =

问题 I've just moved over to Ubuntu 8.10 as my dev box; it's my first serious foray into Linux as a daily-use OS, and I'm having a hard time getting Rails going. I have followed a number of tutorials which all seem to work fine, but when I try and use gem install or gem update on anything, I get an error that looks like this: /usr/local/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require': no such file to load -- zlib (LoadError) from /usr/local/lib/ruby/site_ruby/1.8

问题 According to MSDN in .Net 4.5 System.IO.Compression is based on zlib. I am trying now to change my current interop based reading from a zlib deflated stream from a non .NET server into a BCL based implementation. My implementation looks like this: var enc = new UTF8Encoding(); var readBytes = BufferSizeRaw; var outputBuffer = new byte[BufferSizeRaw]; var networkBuffer = _networkQueue.Take(); var ms = new MemoryStream(networkBuffer.InputBuffer, 0, networkBuffer.UsedLength); using (Stream

问题 I've been trying to compile an application which utilizes zlib compression in VC++ 2010. I get the error LNK2019: unresolved external symbol _inflateInit2_ referenced in function ... error message, which wouldn't be unusual if I didn't link the lib. I link the static release zlib library. I've managed to get this exact same configuration of libs and headers working perfectly in different solutions and hence this behavior is greatly unexpected. Any ideas will be appreciated. UPDATE: Linker

问题 So here's the problem. I have sample.gz file which is roughly 60KB in size. I want to decompress the first 2000 bytes of this file. I am running into CRC check failed error, I guess because the gzip CRC field appears at the end of file, and it requires the entire gzipped file to decompress. Is there a way to get around this? I don't care about the CRC check. Even if I fail to decompress because of bad CRC, that is OK. Is there a way to get around this and unzip partial .gz files? The code I