cd /usr/local/srcwget http://sourceforge.net/projects/graphicsmagick/files/graphicsmagick/1.3.20/GraphicsMagick-1.3.20.tar.gz/downloadtar -zxvf  GraphicsMagick-1.3.20.tar.gzcd GraphicsMagick-1.3.20./configure --prefix=/usr/local/GraphicsMagickmake && make install 

wget http://luajit.org/download/LuaJIT-2.0.2.tar.gztar -zxvf  LuaJIT-2.0.2.tar.gzcd LuaJIT-2.0.2 make && make install PREFIX=/usr/local/lj2  ln -sf LuaJIT-2.0.2 /usr/local/lj2/bin/luajit 

wget https://github.com/simpl/ngx_devel_kit/archive/master.zipunzip master.zip

https://github.com/openresty/lua-nginx-module/archive/master.zipunzip master.zip

 https://github.com/agentzh/echo-nginx-module/zipball/masterunzip echo-nginx-module.zip  

wget http://labs.frickle.com/files/ngx_cache_purge-2.1.tar.gztar -zxvf ngx_cache_purge-2.1.tar.gzcd ngx_cache_purge-2.1...

wget http://nginx.org/download/nginx-1.7.5.tar.gz...

export LUAJIT_LIB=/usr/local/lj2/libexport LUAJIT_INC=/usr/local/lj2/include/luajit-2.0export LD_LIBRARY_PATH=/usr/local/lib/:$LD_LIBRARY_PATH export  PKG_CONFIG_PATH=/usr/local/lib/pkgconfig:$PKG_CONFIG_PATHGM_HOME=/usr/local/GraphicsMagick;PATH=$GM_HOME/bin:$PATH;export PATHexport GM_HOMEsource /etc/profile 

--prefix=/usr/local/nginx  --with-http_stub_status_module --add-module=/usr/src/simpl-ngx_devel_kit --with-ld-opt=-Wl,-rpath,/usr/local/lj2/lib --add-module=/usr/src/ngx_cache_purge-2.1 --with-http_perl_module --add-module=/usr/local/src/lua-nginx-module --add-module=/usr/local/src/echo-nginx-module-master 

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, "([0-9]+)x([0-9]+)");                                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 =http://www.mamicode.com/= 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;    }}

chmod o+w /usr/local/nginx/html/test/image