openresty的安装使用

nginx.conf

#user  nobody;
worker_processes 2;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;


events {
    worker_connections  1024;
}


http {
    include       mime.types;
    default_type  application/octet-stream;

    #log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
    #                  '$status $body_bytes_sent "$http_referer" '
    #                  '"$http_user_agent" "$http_x_forwarded_for"';

    #access_log  logs/access.log  main;

    sendfile        on;
    #tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65;

    #gzip  on;
    upstream backend_server{
        server 116.62.24.11:9993 weight=1;
        server 47.97.206.12:9993 weight=1;
        keepalive 32;
    }
    lua_shared_dict my_cache 128m;
    server {
        listen       80;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

         location /{
	   root   html;
	   index  index.html index.htm;
           proxy_pass http://backend_server;
           proxy_set_header Host $http_host:$proxy_port;
           proxy_set_header X-Real-IP $remote_addr;
           proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
	   proxy_http_version 1.1;
             # 设置Connection为空串,以禁止传递头部到后端
             #              # http1.0中默认值Connection: close
           proxy_set_header Connection "";
        }
	location /staticitem/get{
	   default_type "text/html";
	   content_by_lua_file ../lua/staticitem.lua;
       	}
	location /luaitem/get{
	   default_type "application/json";
	   content_by_lua_file ../lua/itemredis.lua;
	}
	location /resources/ {
            alias  /usr/local/openresty/nginx/html/resources/;
            index  index.html index.htm;
        } 

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }

        # proxy the PHP scripts to Apache listening on 127.0.0.1:80
        #
        #location ~ \.php$ {
        #    proxy_pass   http://127.0.0.1;
        #}

        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
        #
        #location ~ \.php$ {
        #    root           html;
        #    fastcgi_pass   127.0.0.1:9000;
        #    fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
        #    include        fastcgi_params;
        #}

        # deny access to .htaccess files, if Apache's document root
        # concurs with nginx's one
        #
        #location ~ /\.ht {
        #    deny  all;
        #}
    }


    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    #server {
    #    listen       8000;
    #    listen       somename:8080;
    #    server_name  somename  alias  another.alias;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}


    # HTTPS server
    #
    #server {
    #    listen       443 ssl;
    #    server_name  localhost;

    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;

    #    ssl_session_cache    shared:SSL:1m;
    #    ssl_session_timeout  5m;

    #    ssl_ciphers  HIGH:!aNULL:!MD5;
    #    ssl_prefer_server_ciphers  on;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}

}

itemredis.lua

cal args = ngx.req.get_uri_args()
local id = args["id"]
local redis = require "resty.redis"
local cache = redis:new()
local ok,err = cache:connect("8.130.108.42",1314)
local item_model = cache:get("item_"..id)
if item_model == ngx.null or item_model == nil then
            local resp = ngx.location.capture("/item/get?id="..id)
            item_model = resp.body
end
ngx.say(item_model)

itemsharedic.lua

function get_from_cache(key)
     local cache_ngx = ngx.shared.my_cache
     local value = cache_ngx:get(key)
     return value
end
function set_to_cache(key,value,expire)
     if not expire then
           expire = 0
     end
     local cache_ngx = ngx.shared.my_cache
     local succ,err,forcible = cache_ngx:set(key,value,expire)
     return succ
end
local args = ngx.req.get_uri_args()
local id = args["id"]
local item_model = get_from_cache("item_"..id)
if item_model == nil then
    local resp = ngx.location.capture("/item/get?id="..id)
    item_model = resp.body
    set_to_cache("item_"..id,item_model,1*60)
end
ngx.say(item_model)