nginx+lua_nginx+GraphicsMagick生成实时缩略图

来源：互联网发布：大数据资源管理平台编辑：程序博客网时间：2024/05/20 23:58

一、安装 lua

首先确认是否安装 readline

  yum -y install readline-devel ncurses-devel

进入页面：http://www.lua.org/download.html

wget http://www.lua.org/ftp/lua-5.3.1.tar.gz  tar zxvf lua-5.3.1.tar.gz #进入解压目录make linux && make install

wget http://luajit.org/download/LuaJIT-2.0.4.tar.gztar zxvf LuaJIT-2.0.4.tar.gz cd LuaJIT-2.0.4make && make install

ln -s /usr/local/lib/libluajit-5.1.so.2 /lib64/libluajit-5.1.so.2export LUAJIT_LIB=/usr/local/libexport LUAJIT_INC=/usr/local/include/luajit-2.0/

二、安装 GraphicsMagick

进入页面：http://www.graphicsmagick.org/1.3/download.html

tar zxvf GraphicsMagick-1.3.21.tar.gzcd GraphicsMagick-1.3.21./configure  --prefix=/usr/local/graphicsmagick
make && make install

#验证

/usr/local/graphicsmagick/bin/gm version

三、安装nginx

进入页面：http://tengine.taobao.org/opensource_cn.html

./configure --prefix=/usr/local/nginx \            --dso-path=/usr/local/nginx/modules \            --with-http_realip_module \            --with-http_gzip_static_module \            --with-http_stub_status_module \            --with-http_concat_module \            --with-http_lua_module \            --with-pcre=/usr/local/src/pcre-8.37\            --with-zlib=/usr/local/src/zlib-1.2.8\            --with-openssl=/usr/local/src/openssl-1.0.0s\            --http-proxy-temp-path=/var/tmp/nginx/proxy_temp \            --http-fastcgi-temp-path=/var/tmp/nginx/fastcgi_temp \            --http-uwsgi-temp-path=/var/tmp/nginx/uwsgi_temp \            --http-scgi-temp-path=/var/tmp/nginx/cgi_temp \            --http-client-body-temp-path=/var/tmp/nginx/client_body_temp \            --http-log-path=/var/log/nginx/access.log \            --error-log-path=/var/log/nginx/error.log\            --with-ld-opt="-Wl,-rpath,$LUAJIT_LIB"make && make install#启动nginx#测试配置文件  /usr/local/nginx/sbin/nginx -t#启动/usr/local/nginx/sbin/nginx

设置开机启动

vi /etc/rc.d/init.d/nginx

#!/bin/bash# Tengine Startup script# processname: nginx# chkconfig: - 85 15# description: nginx is a World Wide Web server. It is used to serve# pidfile: /var/run/nginx.pid# config: /usr/local/nginx/conf/nginx.confnginxd=/usr/local/nginx/sbin/nginxnginx_config=/usr/local/nginx/conf/nginx.confnginx_pid=/usr/local/nginx/logs/nginx.pidRETVAL=0prog="nginx"# Source function library.. /etc/rc.d/init.d/functions# Source networking configuration.. /etc/sysconfig/network# Check that networking is up.[ ${NETWORKING} = "no" ] && exit 0[ -x $nginxd ] || exit 0# Start nginx daemons functions.start() {if [ -e $nginx_pid ];thenecho "tengine already running...."exit 1fiecho -n $"Starting $prog: "daemon $nginxd -c ${nginx_config}RETVAL=$?echo[ $RETVAL = 0 ] && touch /var/lock/subsys/nginxreturn $RETVAL}# Stop nginx daemons functions.stop() {echo -n $"Stopping $prog: "killproc $nginxdRETVAL=$?echo[ $RETVAL = 0 ] && rm -f /var/lock/subsys/nginx /usr/local/nginx/logs/nginx.pid}reload() {echo -n $"Reloading $prog: "#kill -HUP `cat ${nginx_pid}`killproc $nginxd -HUPRETVAL=$?echo}# See how we were called.case "$1" instart)start;;stop)stop;;reload)reload;;restart)stopstart;;status)status $progRETVAL=$?;;*)echo $"Usage: $prog {start|stop|restart|reload|status|help}"exit 1esacexit $RETVAL

保存退出

chmod 775 /etc/rc.d/init.d/nginx   #赋予文件执行权限chkconfig  --level 012345 nginx on   #设置开机启动service nginx start

四、配置 nginx

nginx.conf

http   {        lua_package_path '/usr/local/openresty/nginx/lua/?.lua;;';                server {                listen       80;                server_name  img.rhythmk.org;                root  /home/wwwroot/static/image;                                #对类似_100x100.gif/jpg/png/jpeg进行缩略图处理                location ~* _([0-9]+)x([0-9]+)\.(gif|jpg|png|jpeg)$ {                 #匹配文件名规则                        root  /home/wwwroot/static/image;                             #站点根目录                        set $image_root /home/wwwroot/static/image;                   #图片目录                        set $thumbnail_root /home/wwwroot/static/thumbnail;           #缩略图存放目录                        #如果缩略图文件存在，直接返回                        set $file $thumbnail_root$uri;                        if (-f $file) {                                rewrite ^/(.*)$ /thumbnail/$1 last;                        }                        #如果缩略图文件不存在，则应用缩略图模块处理                        if (!-f $file) {                                rewrite_by_lua_file lua/thumbnail.lua;                        }                }         }      #include conf/*.conf;}

lua/thumbnail.lua

    local index = string.find(ngx.var.uri, "([0-9]+)x([0-9]+)");      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 = {"80x80", "800x600", "40x40"};      function table.contains(table, element)         for _, value in pairs(table) do            if value == element then               return true            end         end         return false      end        if table.contains(image_sizes, area) then          local command = "gm convert " .. ngx.var.image_root .. originalUri .. " -thumbnail " .. area .. " -background gray -gravity center -extent " .. area .. " " .. ngx.var.file;          os.execute(command);          ngx.req.set_uri(ngx.var.uri, true);      else          ngx.exit(404);      end;

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