zimg安装

There are several dependences of zimg you
should build and install before using zimg. And the version of cmake should
>= 2.8, libevent should >= 2.0, libmemcached should >= 1.0.18.

yum install
openssl-devel cmake libevent-devel libjpeg-devel giflib-devel libpng-devel
libwebp-devel ImageMagick-devel libmemcached-devel

安装需要的软件，但是libwebp-devel yum上没有

libwebp-devel、libevent和libmemcached需要重新编译，因为yum 上的版本过低

1、安装libevent

wget
http://cloud.github.com/downloads/libevent/libevent/libevent-2.0.21-stable.tar.gz

tarzxvf
libevent-2.0.17-stable.tar.gz

cd
libevent-2.0.17-stable

./configure
–prefix=/usr/local

make&& make install

2、安装libmemcached

wget
https://launchpad.net/libmemcached/1.0/1.0.18/+download/libmemcached-1.0.18.tar.gz

tarzxvf libmemcached-1.0.18.tar.gz

cd
libmemcached-1.0.18

./configure
-prefix=/usr/local

make &&　make install

3、安装libwebp-devel

wget
http://downloads.webmproject.org/releases/webp/libwebp-0.4.1.tar.gz(此文件暂时下载不下来 )

tarzxvf
libwebp-0.4.1.tar.gz

cd
libwebp-0.4.1

./configure

make

sudo make install

Now you can build zimg itself. If you want
to gdbzimg, you can use make
debug option.

git clone https://github.com/buaazp/zimg -b
master –depth=1

cdzimg

make

If you want to enable cache to improve
performance, or you want to store the images to a distributed storage backend,
the softwares below is optional.

wget
http://www.memcached.org/files/memcached-1.4.19.tar.gz

tarzxvf
memcached-1.4.19.tar.gz

cd
memcached-1.4.19

./configure
–prefix=/usr/local

make

make install

git clone
https://github.com/douban/beansdb

cdbeansdb

./configure
–prefix=/usr/local

make

git clone
git@github.com:douban/beanseye.git

cdbeanseye

make

wget
–no-check-certificate https://github.com/ideawu/ssdb/archive/master.zip

unzip master

cdssdb-master

make

git clone
git@github.com:twitter/twemproxy.git

cdtwemproxy

autoreconf
-fvi

./configure
–enable-debug=log

make

src/nutcracker -h

在运行zimg之前，你需要按照《Install文档》的说明进行安装，zimg安装成功之后，即可简单修改配置文件后启动。zimg本身的所有选项都在配置文件中进行配置，你可以根据自己的需要修改配置文件：

–zimg server
config

–server
config

—是否后台运行

is_daemon = 1

—绑定IP

ip = ‘0.0.0.0’

—端口

port = 4869

—运行线程数，默认值为服务器CPU数

–thread_num=4

backlog_num = 1024

max_keepalives = 1

retry = 3

system = io.popen(‘uname -sn’):read(‘*l’)

pwd = io.popen(‘pwd’):read(‘*l’)

–header
config

—返回时所带的HTTP header

headers = ‘Cache-Control:max-age=7776000’

—是否启用etag缓存

etag = 1

–access config

–support
mask rules like ‘allow 10.1.121.138/24’

–NOTE:
remove rule can improve performance

—上传接口的IP控制权限，将权限规则注释掉可以提升服务器处理能力，下同

–upload_rule = ‘allow all’

—下载接口的IP控制权限

–download_rule
= ‘allow all’

—管理接口的IP控制权限

admin_rule = ‘allow 127.0.0.1’

–cache
config

—是否启用memcached缓存

cache = 1

—缓存服务器IP

mc_ip = ‘127.0.0.1’

—缓存服务器端口

mc_port = 11211

–log config

–log_level
output specified level of log to logfile

–[[

LOG_FATAL
0 System is unusable

LOG_ALERT
1 Action must be taken immediately

LOG_CRIT
2 Critical conditions

LOG_ERROR
3 Error conditions

LOG_WARNING
4 Warning conditions

LOG_NOTICE
5 Normal, but significant

LOG_INFO
6 Information

LOG_DEBUG
7 DEBUG message

]]

—输出log级别

log_level = 6

—输出log路径

log_name = pwd .. ‘/log/zimg.log’

–htdocconfig

—默认主页html文件路径

root_path = pwd .. ‘/www/index.html’

–admin页面html文件路径

admin_path = pwd .. ‘/www/admin.html’

–image
process config

—禁用URL图片处理

disable_args = 0

—禁用lua脚本图片处理

disable_type = 0

–lua process
script

–lua脚本文件路径

script_name = pwd .. ‘/script/process.lua’

–format
value: ‘none’ for original or other format names

—默认保存新图的格式，字符串‘none’表示以原有格式保存，或者是期望使用的格式名

format = ‘jpeg’

–quality
value: 1~100(default: 75)

—默认保存新图的质量

quality = 75

–storage
config

–zimg
support 3 ways for storage images

—存储后端类型，1为本地存储，2为memcached协议后端如beansdb，3为redis协议后端如SSDB

mode = 1

–save_new
value: 0.don’t save any 1.save all 2.only save types in lua sc开发云主机域名ript

—新文件是否存储，0为不存储，1为全都存储，2为只存储lua脚本产生的新图

save_new = 1

—上传图片大小限制，默认100MB

max_size = 100*1024*1024

—允许上传图片类型列表

allowed_type = {‘jpeg’, ‘jpg’, ‘png’, ‘gif’, ‘webp’}

–mode[1]:
local disk mode

—本地存储时的存储路径

img_path = pwd .. ‘/img’

–mode[2]:
beansdb mode

–beansdb服务器IP

beansdb_ip = ‘127.0.0.1’

–beansdb服务器端口

beansdb_port = 7900

–mode[3]:
ssdb mode

–SSDB服务器IP

ssdb_ip = ‘127.0.0.1’

–SSDB服务器端口

ssdb_port = 8888

然后启动zimg：

cd bin

./zimgconf/zimg.lua

zimg启动之后就可以开始上传和下载图片了，上传方式有两种：

第一种是通过浏览器上传，启动zimg后的默认地址就是一个简单的图片上传页：

http://127.0.0.1:4869/

大约是这个样子的：

上传成功之后会以HTML的格式返回该图片的MD5：

使用到的命令

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