zlib

I have a very large file, approx. 200 million rows of data. I would like to compress it with the Zlib library, specifically using the Writer. Reading through each line one at at time seems like it would take quite a bit of time. Is there a better way to accomplish this? Here is what I have right now: require 'zlib' Zlib::GzipWriter.open('compressed_file.gz') do |gz| File.open(large_data_file).each do |line| gz.write line end gz.close end You can use IO#read to read a chunk of arbitrary length from the file. require 'zlib' Zlib::GzipWriter.open('compressed_file.gz') do |gz| File.open(large_data

解决办法：先用 composer diagnose 命令检测 然后 composer self-update 更新composer版本 最后执行 composer update 或者 composer install composer 切换阿里云镜像 用起来还快 composer config -g repo.packagist composer https://mirrors.aliyun.com/composer/ 来源： oschina 链接： https://my.oschina.net/u/3911977/blog/3106312

1.使用composer self-update 自动升级时失败出现 [ErrorException] zlib_decode(): data error提示 ] 2.编辑php.ini中zlib.output_compression = On、zlib.output_compression_level = 5 3.再使用composer self-update 升级成功 解释：zlib_decode() 属于Zlib 函数 用于解压缩任何raw / gzip / zlib编码的数据 并不是网络的问题，因为download 是100% 下载完了，而是解压时zlib_decode()函数报错 （测试过禁用iPv6等并没有卵用） 回到公司直接安装，一遍成功，？？？还是网络的原因吗？ 来源： oschina 链接： https://my.oschina.net/u/3104120/blog/1609360

导语 Redhat企业级系统的6.7版自带SSH版本为OpenSSH_5.3p1, 基于审计和安全性需求，建议将其升级到最新的OpenSSH版本，当前官网最新版本为7.4p1. 本文档将详细介绍OpenSSH升级的完整步骤。需要说明的是，升级过程中虽然涉及zlib、openssl和openssh的卸载，但是并不会导致当前的ssh远程连接会话断开，因此是可以将整个升级过程写成自动化脚本以进行自动批量部署的。 步骤 1、准备工作 1.1、下载相关软件包 OpenSSH需要依赖zlib和OpenSSL，因此需要从官网下载三者的源码包。需要注意的是：OpenSSH最新版7.4p1依赖的OpenSSL版本为1.0.2k，而不是其最新版1.1.0e（使用此版会升级失败）,ZLIB可以使用最新版1.2.11。redhat6.7自带的zlib版本为1.2.3，也可不进行升级。 三者源码下载地址： http://www.zlib.net/ http://www.openssl.org/ http://www.openssh.org/ 1.2、查看系统当前软件版本 # rpm -q zlib # openssl version # ssh -V 1.3、配置本地yum源 因安装相关工具和编译源码需要先安装部分软件包，因此需要先配置好本地yum源（如有远程yum源更好），配置方法如下： A

For some reason, the zlib.deflate filter doesn't seem to be working with socket pairs generated by stream_socket_pair() . All that can be read from the second socket is the two-byte zlib header, and everything after that is NULL. Example: <?php list($in, $out) = stream_socket_pair(STREAM_PF_UNIX, STREAM_SOCK_STREAM, STREAM_IPPROTO_IP); $params = array('level' => 6, 'window' => 15, 'memory' => 9); stream_filter_append($in, 'zlib.deflate', STREAM_FILTER_WRITE, $params); stream_set_blocking($in, 0); stream_set_blocking($out, 0); fwrite($in, 'Some big long string.'); $compressed = fread($out, 1024

1.新建下载目录 mkdir /data/soft/phpsoft/git 2.下载git wget https://github.com/git/git/archive/v2.22.0.tar.gz 3.解压 tar v2.22.0.tar.gz 3.安装依赖 yum install curl-devel expat-devel gettext-devel openssl-devel zlib-devel gcc perl-ExtUtils-MakeMaker 4.进入目录cd git-2.22.0 5.编译 make prefix=/data/install/git all 6.安装 make prefix=/data/install/git install 7.修改环境变量 vim /etc/profile 增加PATH=$PATH:/data/install/git/bin 8.刷新配置 source /etc/profile 9.查看版本 git --version 来源： https://my.oschina.net/ives/blog/3128376

I have a buffer of bytes read from a library call and I would like to unzip the content which is a single text file. I tried with zlib , but I get this error: >>> import zlib >>> zlib.decompress(buffer) error: Error -3 while decompressing data: incorrect header check However with ZipFile it works, but I have to use a temporary file: import zipfile f = open('foo.zip', 'wb') f.write(buffer) f.close() z = ZipFile('foo.zip') z.extractall() z.close() with open('foo.txt', 'r') as f: uncompressed_buffer = f.read() Is it possible to use zlib and how can I avoid using a temporary file? Is it possible

Debugging differences between Python's zlib and golang's zlib. Why don't the following have the same results? compress.go : package main import ( "compress/flate" "bytes" "fmt" ) func compress(source string) []byte { w, _ := flate.NewWriter(nil, 7) buf := new(bytes.Buffer) w.Reset(buf) w.Write([]byte(source)) w.Close() return buf.Bytes() } func main() { example := "foo" compressed := compress(example) fmt.Println(compressed) } compress.py : from __future__ import print_function import zlib def compress(source): # golang zlib strips header + checksum compressor = zlib.compressobj(7, zlib