zlib

How to use Node.js zlib module with options?

由 耗尽温柔 提交于 2020-01-02 02:38:17
问题 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 回答1: 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 =

Sending compressed text over Amazon SQS from PHP to NodeJS

由 亡梦爱人 提交于 2020-01-01 11:36:21
问题 I seem to be stuck at sending the compressed messages from PHP to NodeJS over Amazon SQS. Over on the PHP side I have: $SQS->sendMessage(Array( 'QueueUrl' => $queueUrl, 'MessageBody' => 'article', 'MessageAttributes' => Array( 'json' => Array( 'BinaryValue' => bzcompress(json_encode(Array('type'=>'article','data'=>$vijest))), 'DataType' => 'Binary' ) ) )); NOTE 1: I also tried putting compressed data directly in the message, but the library gave me an error with some invalid byte data On the

Multithreaded Unzipping In Java

由 醉酒当歌 提交于 2020-01-01 09:17:18
问题 So, I'm trying to do read-only access of a zip file in Java, decompressing in a multithreaded manner, because my standard simple singly-threaded solution of ZipFile/ZipEntry using the enumeration and inputstreams and what-not results in it taking about five full seconds just to decompress into memory a 50-meg zipfile which takes one second AT MOST for my disk to read without decompressing. However, the entire Java zip library is synchronized to an incredibly-obnoxious degree, no doubt because

Zlib deflated input is larger than original input string of chars?

由 有些话、适合烂在心里 提交于 2019-12-31 04:59:05
问题 I'm a bit confused by zlib compressing an input of a string of type char . Below I have the output from the code as posted and what I noticed was that the input string was shorter in bytes compared to the output. The uncompressed size was 8 bytes and the compressed is 12 ? Am I not seeing this correctly instead? Here's the code. #include <stdio.h> #include <string.h> #include <assert.h> #include <iostream> #include "zlib.h" void print( char *array, int length) { for(int index = 0; index <

zlib, harsh compiler warnings and configure test

由 烂漫一生 提交于 2019-12-30 18:49:41
问题 I'm trying to compile zlib from the command line, and I'm getting this message when using -Wall -Wextra -Wconversion (full cross-compile script is below): Compiler error reporting is too harsh for ./configure (perhaps remove -Werror ). Here's the configure test that's generating the line: cat > $test.c << EOF int foo() { return 0; } EOF echo "Checking for obsessive-compulsive compiler options..." >> configure.log if try $CC -c $CFLAGS $test.c; then : else echo "Compiler error reporting is too

Compression and decompression of data using zlib in Nodejs

由 泄露秘密 提交于 2019-12-30 00:31:16
问题 Can someone please explain to me how the zlib library works in Nodejs? I'm fairly new to Nodejs, and I'm not yet sure how to use buffers and streams. My simple scenario is a string variable, and I want to either zip or unzip (deflate or inflate, gzip or gunzip, etc') the string to another string. I.e. (how I would expect it to work) var zlib = require('zlib'); var str = "this is a test string to be zipped"; var zip = zlib.Deflate(str); // zip = [object Object] var packed = zip.toString(

I get this error when installing a gem: “ERROR: While executing gem … (Zlib::GzipFile::Error)” [duplicate]

由 纵然是瞬间 提交于 2019-12-29 01:56:09
问题 This question already has answers here : Closed 6 years ago . Possible Duplicate: ERROR: While executing gem … (Zlib::GzipFile::Error) not in gzip format When installing a gem on my system, I get the following error: gem install blackbook --version ">= 1.0.7" --source http://github.com/tamoyal/blackbook/tree/master ERROR: While executing gem ... (Zlib::GzipFile::Error) not in gzip format Any ideas as to why this is happening? I built the gem so maybe it is something wrong with my gem build?

LNMP架构以及Discuz论坛搭建

由 一曲冷凌霜 提交于 2019-12-28 11:21:35
LNMP架构以及Discuz论坛搭建 文章目录 LNMP架构以及Discuz论坛搭建 前言 实验环境 实验所需要的源码包 实验步骤 1.Nginx的搭建 2.MySQL的搭建 3.PHP的搭建 实验测试 创建论坛 前言 之前，我们装过了LAMP架构，接下来，我们来体验一下LNMP架构的搭建。首先，什么是LNMP架构？LAMP架构是Linux+Apache+MySQL+PHP构成的一个架构，而LNMP是由Linux+Nginx+MySQL+PHP构成的一个架构。接下来，我们来看看怎么搭建这个LNMP架构。 实验环境 centos7主机一台 win10主机一台 实验所需要的源码包 链接：https://pan.baidu.com/s/12fH_wVyJ_OeC1AMzSDr5rg 提取码：p2ae 实验步骤 1.Nginx的搭建 1.首先，我们将防火墙及安全型增强性功能关闭，然后将软件包解压到/opt/目录下 [root@localhost ~]# ls anaconda-ks.cfg initial-setup-ks.cfg LNMP-C7 公共 模板 视频 图片 文档 下载 音乐 桌面 [root@localhost ~]# cd LNMP-C7/ [root@localhost LNMP-C7]# ls Discuz_X3.4_SC_UTF8.zip nginx-1.12.2

hadoop 支持LZO压缩

由 吃可爱长大的小学妹 提交于 2019-12-26 19:07:57
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> Hadoop支持LZO 0. 环境准备 maven（下载安装，配置环境变量，修改sitting.xml加阿里云镜像） gcc-c++ zlib-devel autoconf automake libtool 通过yum安装即可 yum -y install gcc-c++ lzo-devel zlib-devel autoconf automake libtool 1. 下载、安装并编译LZO wget http://www.oberhumer.com/opensource/lzo/download/lzo-2.10.tar.gz tar -zxvf lzo-2.10.tar.gz cd lzo-2.10 ./configure -prefix=/usr/local/hadoop/lzo/ make make install 2. 编译hadoop-lzo源码 2.1 下载hadoop-lzo的源码 下载地址：https://github.com/twitter/hadoop-lzo/archive/master.zip 2.2 解压之后，修改pom.xml <hadoop.current.version>2.7.2</hadoop.current.version> 2.3 声明两个临时环境变量 export

Zlib compression enlarging file

由 孤者浪人 提交于 2019-12-25 19:58:05
问题 I'm trying to use zlib in an iPhone app to compress a text file into a gzip file as a test. I am using the following code const char *s = [[Path stringByReplacingOccurrencesOfString:[NSString stringWithFormat:@".%@", [Path pathExtension]] withString:@".gz"] UTF8String]; gzFile *fi = (gzFile *)gzopen(s, "wb"); const char *c = readFile(Path.UTF8String); gzwrite(fi, c, strlen(c)); gzclose(fi); where readFile() returns a const char* that was obtained from the file using the fgets() function. The
订阅 zlib