fastdfs支持缩略图

fastdfs支持动态缩略图
一， 源码包准备：
GraphicsMagick-1.3.20.tar.gz
jpegsrc.v9a.tar.gz
lua-5.3.0.tar.gz
LuaJIT-2.0.2.tar.gz
lua-nginx-module-0.9.14.tar.gz
ngx_devel_kit0.2.19.tar.gz
git clone https://github.com/agentzh/echo-nginx-module
restyfastdfs.lua http://download.csdn.net/detail/dwl764457208/9216459
fastdfs.lua http://download.csdn.net/detail/dwl764457208/9216463
安装系统的相关依赖包
yum install libtermcap-devel ncurses-devel libevent-devel readline-devel pcre-*
安装lua-5.3.0
tar -xzvf lua-5.3.0.tar.gz
cd lua-5.3.0/
make linux
make install

安装LuaJIT-2.0.2：
tar -zxvf LuaJIT-2.0.2.tar.gz
cd LuaJIT-2.0.2
make
make install
安装jpegsrc.v9a.tar.gz
tar -xzvf GraphicsMagick-1.3.20.tar.gz
cd GraphicsMagick-1.3.20/
./configure
make
make install
安装lua-nginx-module-0.9.16
tar -xzvf lua-nginx-module-0.9.16.tar.gz
安装ngx_devel_kit0.2.19：
tar -xzvf ngx_devel_kit0.2.19.tar.gz
建立软链接
ln -sv /usr/local/lib/libjpeg.so.9 /lib64/libjpeg.so.9
ln -sv /usr/local/lib/libluajit-5.1.so /lib64/liblua-5.1.so.2
chmod -R 777 /mnt/fastdfs_storage_data/ 访问图片需要的权限
将fastdfs.lua和restyfastdfs.lua拷贝至/etc/fdfs
其中修改fastdfs.lua
fdfs:set_tracker(“192.168.65.133”,22122)
修改一下nginx配置文件属性：
vi /etc/nginx/nginx.conf

worker_processes  4;events {    worker_connections  10240;}http {    include       mime.types;    default_type  application/octet-stream;    sendfile        on;    keepalive_timeout  65;    lua_package_path "/etc/fdfs/?.lua;;";    server {        listen       80;        server_name  localhost;        location / {            root   html;            index  index.html index.htm;        default_type text/html;        content_by_lua 'ngx.say("<p>hello,world</p>")';        }    location /group1/M00 {            alias /mnt/fastdfs_storage_data;            set $image_root "/mnt/fastdfs_storage_data/data";            if ($uri ~ "/([a-zA-Z0-9]+)/([a-zA-Z0-9]+)/([a-zA-Z0-9]+)/([a-zA-Z0-9]+)/(.*)") {                set $image_dir "$image_root/$3/$4/";                set $image_name "$5";                set $file "$image_dir$image_name";            }            if (!-f $file) {                # 关闭lua代码缓存，方便调试lua脚本                lua_code_cache off;                content_by_lua_file "/etc/fdfs/fastdfs.lua";            }            ngx_fastdfs_module;        }        error_page   500 502 503 504  /50x.html;        location = /50x.html {            root   html;        }    }}

重新编译nginx

mkdir /etc/nginxcd nginx-1.9.6./configure --prefix=/usr/local/nginx --sbin-path=/usr/sbin --conf-path=/etc/nginx/nginx.conf --with-pcre --add-module=/usr/local/ngx_devel_kit-0.2.19--add-module=/usr/local/lua-nginx-module-0.9.16 --add-module=/usr/local/echo-nginx-module/echo-nginx-module --add-module=/usr/local/fastdfs-nginx-module/src --with-http_gzip_static_module --with-http_stub_status_module --with-http_ssl_module make make installservice nginx restart

fastdfs.lua脚本内容：由于restyfastdfs.lua脚本内容太多。可以下载。

local function writefile(filename, info)    local wfile=io.open(filename, "w") --写入文件(w覆盖)    assert(wfile)  --打开时验证是否出错          wfile:write(info)  --写入传入的内容    wfile:close()  --调用结束后记得关闭end-- 检测路径是否目录local function is_dir(sPath)    if type(sPath) ~= "string" then return false end    local response = os.execute( "cd " .. sPath )    if response == 0 then        return true    end    return falseend-- 检测文件是否存在local file_exists = function(name)    local f=io.open(name,"r")    if f~=nil then io.close(f) return true else return false endendlocal area = nillocal originalUri = ngx.var.uri;local originalFile = ngx.var.file;local index = string.find(ngx.var.uri, "([0-9]+)x([0-9]+)");  if index then     originalUri = string.sub(ngx.var.uri, 0, index-2);      area = string.sub(ngx.var.uri, index);      index = string.find(area, "([.])");      area = string.sub(area, 0, index-1);      local index = string.find(originalFile, "([0-9]+)x([0-9]+)");      originalFile = string.sub(originalFile, 0, index-2)end-- check original fileif not file_exists(originalFile) then    local fileid = string.sub(originalUri, 2);    -- main    local fastdfs = require('restyfastdfs')    local fdfs = fastdfs:new()    fdfs:set_tracker("192.168.65.113", 22122)    fdfs:set_timeout(1000)    fdfs:set_tracker_keepalive(0, 100)    fdfs:set_storage_keepalive(0, 100)    local data = fdfs:do_download(fileid)    if data then       -- check image dir        if not is_dir(ngx.var.image_dir) then            os.execute("mkdir -p " .. ngx.var.image_dir)        end        writefile(originalFile, data)    endend-- 创建缩略图local image_sizes = {"80x80", "800x600", "40x40", "60x60"};  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 " .. originalFile  .. " -resize "  .. area .. " " .. ngx.var.file;      os.execute(command);  end;if file_exists(ngx.var.file) then    --ngx.req.set_uri(ngx.var.uri, true);      ngx.exec(ngx.var.uri)else    ngx.exit(404)end