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Nginx下lua_Nginx+GraphicsMagick实时缩略图例子

来源: 网络整理  作者: 佚名

下面我们来看一篇Nginx下lua_Nginx+GraphicsMagick实时缩略图例子,希望文章能够为各位带来帮助。

1、安装GraphicsMagick
cd /usr/local/src
wget http://sourceforge.net/projects/graphicsmagick/files/graphicsmagick/1.3.20/GraphicsMagick-1.3.20.tar.gz/download
tar -zxvf  GraphicsMagick-1.3.20.tar.gz
cd GraphicsMagick-1.3.20
./configure --prefix=/usr/local/GraphicsMagick
make && make install
2、下载luajit
wget http://luajit.org/download/LuaJIT-2.0.2.tar.gz
tar -zxvf  LuaJIT-2.0.2.tar.gz
cd LuaJIT-2.0.2
make && make install PREFIX=/usr/local/lj2
ln -sf LuaJIT-2.0.2 /usr/local/lj2/bin/luajit
3、下载  ngx_devel_kit 模块

wget https://github.com/simpl/ngx_devel_kit/archive/master.zip  unzip master.zip
4、下载 lua-nginx-module 模块
https://github.com/openresty/lua-nginx-module/archive/master.zip  unzip master.zip
5、下载echo
https://github.com/agentzh/echo-nginx-module/zipball/master  unzip echo-nginx-module.zip
6、下载cache
wget http://labs.frickle.com/files/ngx_cache_purge-2.1.tar.gz

tar -zxvf ngx_cache_purge-2.1.tar.gz

cd ngx_cache_purge-2.1

...
7、下载nginx
wget http://nginx.org/download/nginx-1.7.5.tar.gz ...
8、设置环境变量
export LUAJIT_LIB=/usr/local/lj2/lib

export LUAJIT_INC=/usr/local/lj2/include/luajit-2.0

export LD_LIBRARY_PATH=/usr/local/lib/:$LD_LIBRARY_PATH

export  PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:$PKG_CONFIG_PATH

GM_HOME=/usr/local/GraphicsMagick;

PATH=$GM_HOME/bin:$PATH;

export PATH

export GM_HOME

source /etc/profile

9、nginx 编译安装

--prefix=/usr/local/nginx  --with-http_stub_status_module --add-module=/usr/src/simpl-ngx_devel_kit --with-ld-opt=-Wl,-rpath,/usr/local/lj2/lib --add-module=/usr/src/ngx_cache_purge-2.1 --with-http_perl_module --add-module=/usr/local/src/lua-nginx-module --add-module=/usr/local/src/echo-nginx-module-master
如果编译有错,请把pcre扩展附加上


  10、nginx配置



  11、虚拟目录vhost


server {
listen 80;
server_name image.host.com;
root /usr/local/nginx/html/test;
index index.html index.htm index.php;

location /lua1 {

default_type 'text/plain';
content_by_lua 'ngx.say("hello, lua")';
}

location  /image {

set $image_root /usr/local/nginx/html/test;

set $file "$image_root$uri";

if (!-f $file) {
rewrite_by_lua '
local index = string.find(ngx.var.uri, "([0-9]+)x([0-9]+)");
if (index == nil) then
ngx.exit(404);end;
local originalUri = string.sub(ngx.var.uri, 0, index-2);
local area = string.sub(ngx.var.uri, index);
index = string.find(area, "([.])");
area = string.sub(area, 0, index-1);
local image_sizes = {"160x160","400x300"};
local image_big = {"80x60^", "120x90^", "160x120^"};
function table.contains(table, element)
for _, value in pairs(table) do
if value == element then
return true
end
end
return false
end
# print(table.contains(image_big, area))
if table.contains(image_big, area) then
local command = "/usr/local/GraphicsMagick/bin/gm convert " .. ngx.var.image_root ..  originalUri  .. " -thumbnail " .. area .. " -background gray -gravity center -extent " .. area .. " " .. ngx.var.image_root .. ngx.var.uri
os.execute(command);
else
if table.contains(image_sizes, area) then
local command = "/usr/local/GraphicsMagick/bin/gm convert " .. ngx.var.image_root ..  originalUri  .. " -thumbnail "  .. area .. " " .. ngx.var.image_root .. ngx.var.uri;
os.execute(command);
else
ngx.exit(404);
end;
end;
';
}
# alias /usr/local/nginx/html/test/image;

expires 7d;
}
}

12、赋予权限
chmod o+w /usr/local/nginx/html/test/image
13、访问

原地址:http://image.rose.com/image/2.jpg

缩略图地址:http://image.rose.com/image/2.jpg.400x300.jpg

error:
1
./configure --prefix=/usr/local/nginx --with-http_stub_status_module
--add-module=/usr/local/src/ngx_devel_kit-0.2.19  --with-ld-opt=-Wl,-rpath,/usr/local/lj2/lib
--add-module=/usr/local/src/ngx_cache_purge-2.1 --with-http_perl_module
--add-module=/usr/local/src/lua-nginx-module-master
--add-module=/usr/local/src/openresty-echo-nginx-module-a736511
--with-pcre=/usr/local/src/pcre-8.35 --with-zlib=/usr/local/src/zlib-1.2.8
--with-openssl=/usr/local/openssl
make
make install

Tags:实时 例子
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