Nginx+lua_Nginx+GraphicsMagick nginx 缩略图
Nginx+lua_Nginx+GraphicsMagick来实现实时缩略图（已验证）前期准备
tar zxf libpng-1.6.16.tar.gz
make&&make install
tar zxf jpegsrc.v9a.tar.gz
make&&make install
1、安装GraphicsMagickhttp://blog.51cto.com/e/u261/themes/default/images/spacer.gif
cd /usr/local/src
wget http://sourceforge.net/projects/graphicsmagick/files/graphicsmagick/1.3.20/GraphicsMagick-1.3.20.tar.gz/download
tar -zxvfGraphicsMagick-1.3.20.tar.gz
cd GraphicsMagick-1.3.20
./configure --prefix=/usr/local/GraphicsMagick --with-jpeg=yes --with-png=yes
make && make install
2、下载luajit
wget http://luajit.org/download/LuaJIT-2.0.2.tar.gz
tar -zxvfLuaJIT-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
4、下载 lua-nginx-module 模块
https://github.com/openresty/lua-nginx-module/archive/master.zip
unzip master
5、下载echo
https://github.com/agentzh/echo-nginx-module/zipball/master
unzip echo-nginx-module
6、tar zxf ngx_cache_purge-2.3.tar.gz
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/:$LD_LIBRARY_PATH
exportPKG_CONFIG_PATH=/usr/local/lib/pkgconfig:$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
./configure --prefix=/usr/local/nginx--with-http_stub_status_module --add-module=/usr/local/src/ngx_devel_kit-master --with-ld-opt=-Wl,-rpath,/usr/local/lj2/lib --add-module=/usr/local/src/ngx_cache_purge-2.3 --with-http_perl_module --add-module=/usr/local/src/lua-nginx-module-master --add-module=/usr/local/src/openresty-echo-nginx-module-23cb1c2
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, "(+)x(+)");
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;
}
}
http://blog.51cto.com/e/u261/themes/default/images/spacer.gif
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
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