zlib | 易学教程

How to use Node.js zlib module with options?

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I need to compress a buffer in Node.js with zlib at the extreme compression level. The outputted header should be 78 DA. Unless I'm missing something, the Node.js documentation doesn't really describe how to use the zlib.Deflate class. It doesn't accept any parameters. http://nodejs.org/api/zlib.html#zlib_class_zlib_deflate Use zlib. createGzip / createDeflate to get an instance of the compressor you need, with options in an object. If you want to do this all in-memory: var zlib = require('zlib'); // create a new gzip object var gzip = zlib.createGzip({ level: 9 // maximum compression }),

Nginx安装手册

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Nginx安装手册 Nginx安装手册 1 nginx安装环境 nginx是C语言开发，建议在linux上运行，本教程使用Centos6.5作为安装环境。 gcc 安装nginx需要先将官网下载的源码进行编译，编译依赖gcc环境，如果没有gcc环境，需要安装gcc：yum install gcc-c++ PCRE PCRE(Perl Compatible Regular Expressions)是一个Perl库，包括 perl 兼容的正则表达式库。nginx的http模块使用pcre来解析正则表达式，所以需要在linux上安装pcre库。 yum install -y pcre pcre-devel 注：pcre-devel是使用pcre开发的一个二次开发库。nginx也需要此库。 zlib zlib库提供了很多种压缩和解压缩的方式，nginx使用zlib对http包的内容进行gzip，所以需要在linux上安装zlib库。 yum install -y zlib zlib-devel openssl OpenSSL 是一个强大的安全套接字层密码库，囊括主要的密码算法、常用的密钥和证书封装管理功能及SSL协议，并提供丰富的应用程序供测试或其它目的使用。 nginx不仅支持http协议，还支持https（即在ssl协议上传输http），所以需要在linux安装openssl库。

centos7 安装python3.7

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sudo yum -y groupinstall development sudo yum -y install zlib zlib-devel sudo yum install -y zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-develsudo wget https://www.python.org/ftp/python/3.6.4/Python-X.X.X.tgz tar xf Python-X.X.X.tgz cd Python-X.X.X sudo ./configure sudo make sudo make install 来源： https://www.cnblogs.com/ingwant/p/11904918.html

Static libpng link with visual studio 2010

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问题 I'm trying to add PNG support to my application and thus I want to include libpng. I know it needs zlib and thus I downloaded that as well. I went into the png folder/projects/vstudio and I opened the solution. I compiled it and it went just fine. I added some headers from it into my application and I copied the lib files. My program is a dll written in c++ which is later used from C#. When I run it in C# it complains about not finding my dll (tough if I remove the png part it works fine). I

CentOs6.5 + Nginx 1.6.0 + Node.js0.9.0 + Mongodb配置

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添加非root用户 under root permision adduser wedate passwd wedate—> input the new password chmod u+w /etc/sudoers vim /etc/sudoers 添加 wedate All=(ALL) ALL 在root之后（首先搜索到root） :wq chmod u-w /etc/sudoers 安装必要的包依赖更新系统所需的包 yum update 下载nginx（目前稳定版） /* 系统约定软件源代码包存放位置：/usr/local/src 源码包编译安装位置：/usr/local/软件名字 */ wget http://nginx.org/download/nginx-1.6.0.tar.gz 下载pcre （支持nginx伪静态） wget ftp://ftp.csx.cam.ac.uk/pub/software/programming/pcre/pcre-8.35.tar.gz 下载openssl（nginx扩展） wget http://www.openssl.org/source/openssl-1.0.1h.tar.gz 下载zlib（nginx扩展） wget http://zlib.net/zlib-1.2.8.tar.gz 下载nodejs wget http:/

cx_freeze “zlib not avaiable” error when using multiple threads

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问题 I have a Python application which works perfectly when run through the standard interpreter, but not when frozen with cx_freeze . My application makes use of the python Threading module, and typically has around 5 components running, each of which can be individually enabled / disabled in its configuration, and each running in their own individual thread. With 1 or 2 components enabled, no issue. However, when 3 or more components are enabled, I see the following error message for all or

How to compile Python 2.4.6 with ssl, readline and zlib on Debian Lenny

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问题 I have a virtual Linux box with Debian 7.1 where I need a Python 2.4.6 to reanimate an old Zope installation (in order to update it to Plone 4, of course). I definitely need ssl support, and when I'm compiling, I want readline as well, of course. Finally, of course I need zlib , otherwise ez_setup.py etc. won't work; I'm having a hard time to get zlib included. I downloaded the tarball of Python 2.4.6, enabled ssl in Modules/Setup.dist : SSL=/usr/local/ssl _ssl _ssl.c \ -DUSE_SSL -I$(SSL)

How do I use PHP's stream_select() with a zlib filter?

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问题 I currently have a server daemon written in PHP which accepts incoming connections and creates network streams for them using the stream_socket_* functions and polls active streams using stream_select() . I'd like to be able to add a zlib filter (using string_filter_append() ) to an arbitrary stream, but when I do, I get an error telling me that stream_select() can't be used to poll a filtered stream. How can I get around this limitation? 回答1: You can use a pipe, and add the filter to the

python实现数据的压缩与归档

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楔子尽管现代计算机系统的存储能力日益增长，但生成数据的增长是永无休止的。无损(lossless)压缩算法以压缩或解压缩数据花费的时间来换取存储数据所需要的空间，以弥补存储能力的不足。 Python为最流行的一些压缩库提供了接口，从而能使用不同压缩库读写文件。 zlib和gzip提供了GNU zip库，另外bz2允许访问更新的bzip2格式。这些格式都处理数据流而不考虑输入格式，并且提供的接口可以透明地读写压缩文件。可以使用这些模块来压缩单个文件或者数据源标准库还包括一些模块来管理归档(archive)格式，能够将多个文件合并到一个文件，该文件可以作为一个单元来管理。tarfile读写unix磁带归档格式，这是一种老标准，但由于其灵活性，当前仍得到广泛使用。zipfile根据zip格式来处理归档，这种格式因pc程序pkzip得以普及，原先在MS-DOS和Windows下使用，不过由于其API的简单性以及这种格式的可移植性，现在也用于其他平台 zlib：GNU zlib压缩介绍 zlib模块为GNU项目zlib压缩库中的很多函数提供了底层接口处理内存中的数据 import zlib import binascii ''' 使用zlib最简单的方法要求把所有将要压缩或解压缩的数据放到内存中 ''' original_data = b"this is a original text

php zlib: How to dynamically create an in-memory zip files from string variables?

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this is what I need $a=array('folder'=>'anyfolder','filename'=>'anyfilename','filedata'=>'anyfiledata'); I need to create a variable $zip with compressed data from $a and output this $zip into browser window with header('Content-type: application/octetstream'); echo $zip; All libs that I found, they pack files and create zip files physically on disk. I need to do it dynamically, using memory. Is there any examples of how to do it using pure php's zlib and without studying the zip format specifications? UPD: could it be done with CreateZIP class? UPUPD: Yes. it could =) Yes, CreateZIP class