zlib | 易学教程

Boost IO Stream and ZLib speed up

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问题 I have a large file of data I have compressed with Zlib using boost IOStreams and filtering stream buffers: boost::iostreams::array_source uncompressedArray( reinterpret_cast< const char* >( &uncompressedData[0] ), uncompressedData.size() ); boost::iostreams::filtering_streambuf< boost::iostreams::output > out; out.push( *m_compressor ); out.push( boost::iostreams::char_back_inserter( compressedData ) ); boost::iostreams::copy( uncompressedArray, out ); For speed I am initializing the zlib

Ungzip csv files in web browser with javascript

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问题 I want to download gzipped csv files from a web server and ungzip then in the browser. So far I have tried using pako and zlib to take a file gzipped on my server, but have had various issues. Trying to unzip a unix-gzipped file, I kept getting an incorrect header message. Next, I tried using node to zip the file on the server, and am currently getting this error Uncaught Error: invalid file signature:,� Here is the command I am using to get the file: $.ajax({ type: "GET", url: 'public/pols

Good zlib implementation in .NET?

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问题 I'm building an network application that needs to be able to switch from normal network traffic to a zlib compressed stream, mid stream. My thoughts on the matter involve boolean switch that when on will cause the network code to pass all the data through a class that I can feed IEnumerable<byte> into, and then pull out the decompressed stream, passing that on to the already existing protocol parsing code. Things I've looked at: ZLib.NET - It seems a little... Ecclectic, and not quite what I

Installing PIP Python 3.6.3 Ubuntu 16.04 Zlib Not Available, But It's Installed

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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've googled a lot and tried reinstalling, but haven't had any success. Sorry to start a new question,

zlib for WinRT?

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I require zlib library for the development of Windows Store app. Has anyone converted Win32 zlib project to WinRT yet? Can anyone please describe the steps to convert the existing win32 static lib project to winRT? Visual C++ is already a supported language for WinRT development, if you wan't to use zlib, just compile it together with your solution. There is nothing that is preventing you from reusing standard ISO C and C++ libraries from within the WinRT, if you are using the C++ language, you might have to expose certain aspects of your library as WinRT Components but only if you need to

Native Swift implementation of DEFLATE (unzip) algorithm [closed]

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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 2 years ago . I have some data that has been compressed with the DEFLATE algorithm which I believe is basically just saying its zipped up. I'm writing a swift app and I was interested in figuring out if there is a native pure swift (2.0) implementation of the unzip algorithm. I need to implement this in a swift dynamic framework, and as such it would be preferable if i didn't have to use Objective-c code as that requires me

Python and zlib: Terribly slow decompressing concatenated streams

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I've been supplied with a zipped file containing multiple individual streams of compressed XML. The compressed file is 833 mb. If I try to decompress it as a single object, I only get the first stream (about 19 kb). I've modified the following code supplied as a answer to an older question to decompress each stream and write it to a file: import zlib outfile = open('output.xml', 'w') def zipstreams(filename): """Return all zip streams and their positions in file.""" with open(filename, 'rb') as fh: data = fh.read() i = 0 print "got it" while i < len(data): try: zo = zlib.decompressobj() dat

linux 安装 nginx

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安装编译工具及库文件：以便后续对nginx和相关工具进行编译 yum -y install make zlib zlib-devel gcc-c++ libtool openssl openssl-devel zlib与zlib-devel：具体zlib-devel是什么东西，我在网上找到了这样一段话：“ devel包含普通包，只比普通包多了头文件。动态链接库的话两种包都有。编译的时候如果需要用到这个库，那么需要安装这个库的devel，因为需要头文件 ” 我个人的理解是，有些程序，需要依赖一些第三方的东西才能使用，应用到我们当前的场景，就是，nginx安装时有些东西需要用到 zlib-devel库，所以，我们要先安装zlib-devel，但是，zlib-devel依赖于 zlib所以我们要先安装zlib gcc-c++：是一个编译器，大致分为两部分，一部分用来处理编译各种代码，将代码转为c代码，另一部分将得到的c代码进行编译转成电脑硬件相关的汇编或机器码等（类似于Java的一次编译处处运行） libtool：是一个通用库支持脚本(/usr/bin/libtool)，将使用动态库的复杂性隐藏在统一、可移植的接口中。 openssl与openssl-devel：是一个开放源代码的软件库包，应用程序可以使用这个包来进行安全通信，避免窃听，同时确认另一端连接者的身份

CentOS 7 升级Python2.7到Python-3.7.4

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Python-3.7.4.tgz下载地址：官网境外下载比较慢可以在这个地址下载：https://pan.baidu.com/s/15qfRGIyiy8glNFXT9UxSiQ 官网下载地址： https://www.python.org/downlo... 1：安装zlib yum -y install zlib zlib-devel 2：下载，编译安装python3.7 mkdir /usr/local/python3 cd /usr/local/python3 如果Python-3.7.4.tgz手动下载，那么将其赋值到/usr/local/python3 目录下，然后在解压tar -zxf Python-3.7.4.tgz # 下载 wget https://www.python.org/ftp/python/3.7.4/Python-3.7.4.tgz # 解压 tar -zxf Python-3.7.4.tgz # 安装依赖包 yum install zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gcc libffi-devel # 进入python目录 cd Python-3.7.4 # 编译 ./configure --prefix=

CentOS 7 升级Python2.7到Python-3.7.4

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