CentOS安装nginx+lua_nginx+GraphicsMagick生成实时缩略图

下载：
软件下载地址：
http://soft.ileiming.com/gm.tar.gz
安装
tar -zxvf gm.tar.gz
tar -zxvf GraphicsMagick-1.3.12.tar.gz
cd GraphicsMagick-1.3.12
./configure –prefix=/usr/local/gm
make && make install

tar -zxvf LuaJIT-2.0.0-beta10.tar.gz
cd LuaJIT-2.0.0-beta10
make && make install PREFIX=/usr/local/lj2
ln -sf luajit-2.0.0-beta10 /usr/local/lj2/bin/luajit

unzip simpl-ngx_devel_kit-v0.2.19-0-g8dd0df5.zip

tar -zxvf  chaoslawful-lua-nginx-module-v0.9.2-61-ge4e085f.tar.gz

unzip agentzh-echo-nginx-module-v0.49-1-g84feae9.zip

tar -zxvf ngx_cache_purge-1.6.tar.gz

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-1.3.16;
PATH=$GM_HOME/bin:$PATH;
export PATH
export GM_HOME

使环境变量生效：source /etc/profile

tar -zxvf nginx-1.2.1.tar.gz
cd nginx-1.2.1
./configure –prefix=/usr/local/nginx5 –user=www –group=www –with-http_stub_status_module –add-module=/root/gm/simpl-ngx_devel_kit-8dd0df5 –with-ld-opt=-Wl,-rpath,/usr/local/lj2/lib –add-module=/root/gm/ngx_cache_purge-1.6 –with-http_perl_module –add-module=/root/gm/chaoslawful-lua-nginx-module-e4e085f –add-module=/root/gm/agentzh-echo-nginx-module-84feae9 –with-pcre
如果报错，很可能是没有安装lua和lua-devel
直接yum安装即可：# yum install lua lua-devel

##########################################

nginx配置文件
server {
        listen 80;
        server_name 192.168.1.199;
        root /usr/local/nginx5/html/test;
        index index.html index.htm index.php;

        location /image/ {
                set $image_root /usr/local/nginx5/html/test;
                set $file $image_root$uri;
                set $forward_url "";

                if (!-e $file) {
                rewrite_by_lua '
                        local originalUri = nil;
                        local area = nil;
                        local index = string.find(ngx.var.uri, "([0-9]+)x([0-9]+)");
                        local oUIndex = nil;
                        local fileExtName = nil;
                        local fileSuffix = nil;
                        if  index ~= nil then
                                originalUri = string.sub(ngx.var.uri, 0, index-2);
                                oUIndex = string.find(originalUri,"([.])");
                                fileExtName = string.sub(originalUri,oUIndex+1);
                                fileSuffix = string.sub(originalUri,0,oUIndex-1);
                                area = string.sub(ngx.var.uri, index);
                                index = string.find(area, "([.])");
                                if  index ~= nil then
                                        area = string.sub(area, 0, index-1);
                                end;
                          end;
                        if originalUri ~= nil then
                                local command = "/usr/local/gm/bin/gm convert " .. ngx.var.image_root..originalUri  .. " -thumbnail " .. area .. " -background gray -gravity center -extent " .. area .." ".. ngx.var.image_root..originalUri .."_" .. area .. "."..fileExtName;
                                os.execute("echo command "..command .."  >>/usr/local/nginx5/html/123.txt");

                                os.execute(command);
                                ngx.var.forward_url = fileSuffix.."_thumb."..fileExtName;

                        else
                                ngx.var.forward_url = ngx.var.uri;
                        end;
                   ';

                 }

        }

}

以上配置只是简单的生成缩略图的配置，通过nginx来控制lua还可以实现只生成固定大小的图片或是，还可以调用A文件夹的图片生成到B文件夹内等非常有用的功能

访问用1.jpg_200x200.jpg