zlib

How to dump a compressed object for given key from Memcache?

由 浪子不回头ぞ 提交于 2019-12-11 14:42:18
问题 I'm using the following command to dump the compressed object for given key from memcached : cat <(printf "\x1f\x8b\x08\x00\x00\x00\x00\x00") <(memccat CACHE-KEY) | gunzip It prints the value (a JSON), but with the warning at the end: gzip: stdin: unexpected end of file I believe it may be missing last 4 bytes of checksum (ADLER32), but I'm not sure. What would be the proper way of dumping a compressed key value in a plain text format from Memcached caching service? 回答1: It looks like the

Attached code throws java.util.zip.ZipException: incorrect data check for given .dat file

由 ε祈祈猫儿з 提交于 2019-12-11 12:39:49
问题 I have a dat file which is encoded using flate. I am trying to decode that file using InflateInputStream which is based on ZLib library. But using the below sample gives me Exception in thread "main" java.util.zip.ZipException: incorrect data check The .dat file is kept here Code:- int buflength = 1; byte[] buf = new byte[buflength]; FileInputStream is = new FileInputStream(new File(INPUT_DIRECTORY + INPUT_FILE)); Inflater decompresser = new Inflater(); //decompresser.setInput(buf);

how to report progress of data read on a QuaGzipFile (QuaZIP library)

由 廉价感情. 提交于 2019-12-11 12:18:11
问题 I am using QuaZIP 0.5.1 with Qt 5.1.1 for C++ on Ubuntu 12.04 x86_64. My program reads a large gzipped binary file, usually 1GB of uncompressed data or more, and makes some computations on it. It is not computational-extensive, and most of the time is passed on I/O. So if I can find a way to report how much data of the file is read, I can report it on a progress bar, and even provide an estimation of ETA. I open the file with: QuaGzipFile gzip(fileName); if (!gzip.open(QIODevice::ReadOnly)) {

zLib inflate has empty result in some cases

由 早过忘川 提交于 2019-12-11 12:02:54
问题 My program processes PDF files and reads some streams out of them. There are also FlateEncoded streams in there. I use the "inflate()" method of zlib to decompress them. This usually works really well with the following code: static string FlateDecode(string s){ int factor = 50; z_stream stream; while(true){ char * out = new char[s.length()*factor]; stream.zalloc = Z_NULL; stream.zfree = Z_NULL; stream.opaque = Z_NULL; stream.avail_in = s.length(); stream.next_in = (Bytef*)s.c_str(); stream

阿里云服务器安装nginx【nginx】

由 試著忘記壹切 提交于 2019-12-11 11:32:50
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 1.准备软件 cd /usr/local/src/ wget http://www.zlib.net/zlib-1.2.11.tar.gz wget https://ftp.pcre.org/pub/pcre/pcre-8.40.tar.gz wget https://www.openssl.org/source/openssl-1.1.0e.tar.gz wget http://nginx.org/download/nginx-1.10.3.tar.gz 2.解压软件 tar zxvf nginx-1.10.3.tar.gz tar zxvf pcre-8.40.tar.gz tar zxvf zlib-1.2.11.tar.gz tar zxvf openssl-1.1.0e.tar.gz 3.配置安装 cd nginx-1.10.3 yum install gcc gcc-c++ ncurses ncurses-devel bison libgcrypt perl automake autoconf libtool make groupadd www useradd -r -g www www 重要配置（如果安装下载路径不和上文一致，可自己变更）：./configure --prefix=/usr

error LNK2019 for ZLib sample code compiling

由 落花浮王杯 提交于 2019-12-11 11:23:29
问题 I created win32 console application in vs2010 (without select the option of precompiled header). And I inserted the code below. but *.obj link failed. Could you provide me more information about the error. I searched MSDN, but still can't understand it. #include <stdio.h> #include "zlib.h" // Demonstration of zlib utility functions unsigned long file_size(char *filename) { FILE *pFile = fopen(filename, "rb"); fseek (pFile, 0, SEEK_END); unsigned long size = ftell(pFile); fclose (pFile);

How to force zlib to decompress more than X bytes?

由 狂风中的少年 提交于 2019-12-11 10:45:34
问题 I have a file that consists of compressed content plus a 32 byte header. The header contains info such as timestamp, compressed size, and uncompressed size. The file itself is about 490mb and the header indicates the uncompressed size is close to 2.7gb (it's clearly incorrect, as it also believes the compressed size to be 752mb). I've stripped the header and generated the compressed payload and can uncompress it with zlib. The problem is that it is only decompressing 19kb, which is much

Ruby cannot load such file -- zlib和openssl(LoadError)及gem No rule to make target `/include/ruby.h&apos;解决

由 夙愿已清 提交于 2019-12-11 10:17:24
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> Ruby源码安装cannot load such file -- zlib和cannot load such file -- openssl及gem No rule to make target `/include/ruby.h'解决办法 发生问题时我的前置条件 linux版本： Linux ossjh2 3.10.0-862.el7.x86_64 #1 SMP Fri Apr 20 16:44:24 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux gcc版本： gcc version 4.8.5 20150623 (Red Hat 4.8.5-39) (GCC) Ruby版本：ruby 2.6.5p114 (2019-10-01 revision 67812) [x86_64-linux] Ruby安装方式： 源码安装且源码未删除 安装Ruby及gems目的: 使用ruby搭建redis集群 cannot load such file -- zlib 问题解决 原因 缺少zlib函式库 缺少ruby-zlib 解决 （未安装zlib时）下载安装zlib 我是使用源码安装，由是默认安装到/usr/local/lib，我选择使用root用户操作 安装版本zlib-1.2.11

MinGW: libpng won't build properly

由 雨燕双飞 提交于 2019-12-11 09:49:18
问题 So I need this libpng to be statically link with my dll to be used by my exe. This dll is already done before until I switch my compiler from MSVC to MinGW, then this dll won't work anymore so I think I should rebuild it again through MinGW. Now, I cannot resolve the linker errors that I get into libpng so I decided to rebuild it(libpng) myself again . Another problem arises with this zlib or libz (I don't know their difference), so I rebuilt it again and produces libz.a using make . I then

PIL: converting an image with mode “I” to “RGB” results in a fully white image

由 孤者浪人 提交于 2019-12-11 08:29:32
问题 The image at the end of this question is a PNG with mode I, which stands for Indexed, as far as I can tell. I'm trying to create a thumbnail out of it, and save it as JPG with PIL. However, is I leave the mode alone, PIL won't let me resize it with error unable to generate thumbnail: cannot write mode I as JPEG. If I convert it to RGB , the result will be a fully white image. Is there a way to fix this? https://www.dropbox.com/s/2d1edk2iu4ixk25/NGC281.png 回答1: The input image is a 16-bit
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