fdfs.conf

server{
    listen      80;
    server_name fdfs.xxx.com;

    set $img_thumbnail_root /opt/fastdfs/thumb; #set thumb path
    set $img_file $img_thumbnail_root$uri;   #thumb file

    # like：/pic/M00/xx/xx/xx.jpg_100-.jpg or /pic/M00/xx/xx/xx.jpg_-100.jpg
    location ~* ^(\/(\w+)(\/M00)(.+\.(jpg|jpeg|gif|png)))_((\d+\-)|(\-\d+))\.(jpg|jpeg|gif|png)$ {
            root $img_thumbnail_root;    # root path for croped img
            set $fdfs_group_root /opt/fastdfs/$2/store0/data; #set fastdfs group path $2

            if (!-f $img_file) {    # if thumb file not exists
                    add_header X-Powered-By 'Nginx+Lua+GraphicsMagick By Yanue';  #  header for test
                    add_header file-path $request_filename;    #  header for test
                    set $request_filepath $fdfs_group_root$4;    # origin_img full path：/document_root/1.gif
                    set $img_size $6;    # img width or height size depends on uri : img size like "-100" or "100-", "-" means auto size
                    set $img_ext $5;    # file ext
                    content_by_lua_file /etc/nginx/lua/autoSize.lua;    # load auto width or height crop Lua file
            }
    }

    # like：/pic/M00/xx/xx/xx.jpg_200x100.jpg
    location ~* ^(\/(\w+)(\/M00)(.+\.(jpg|jpeg|gif|png))_(\d+)+x(\d+)+\.(jpg|jpeg|gif|png))$ {
            root $img_thumbnail_root;    # root path for croped img
            set $fdfs_group_root /opt/fastdfs/$2/store0/data; #set fastdfs group path $2

            if (!-f $img_file) {   # if thumb file not exists
                    add_header X-Powered-By 'Nginx+Lua+GraphicsMagick By Yanue';  #  header for test
                    add_header file-path $request_filename;    #  header for test
                    set $request_filepath $fdfs_group_root$4;    # real file path
                    set $img_width $6;    #  img width
                    set $img_height $7;    #  img height
                    set $img_ext $5;     # file ext
                    content_by_lua_file /etc/nginx/lua/cropSize.lua;    # load crop Lua file
            }
    }

    location /pic/M00 {
            # add support for img which has query params,
            # like:  xxx.jpg?a=b&c=d_750x750.jpg
            if ($args ~* "^([^_]+)_(\d+)+x(\d+)+\.(jpg|jpeg|gif|png)$"){
                    set $w $2;
                    set $h $3;
                    set $img_ext $4;

                    # rewrite ^\?(.*)$  _${w}x${h}.$img_ext?   last;
                    rewrite ([^.]*).(jpg|jpeg|png|gif)$  $1.$2_${w}x${h}.$img_ext? permanent;
            }

            alias /opt/fastdfs/pic/store0/data;
            ngx_fastdfs_module;
    }

    location = /favicon.ico {
            log_not_found off;
            access_log off;
    }
}