Nginx + Lua + 共享内存实现动态查询

  1. lua_package_path "/usr/local/share/luajit-2.0.2/jit?.lua;;";  
  2. lua_shared_dict devicedb 45m;   
  3.     location /query {  
  4.        default_type 'text/plain';  
  5.        content_by_lua '  
  6.                 local args = ngx.req.get_uri_args()  
  7.                 local devicetype = args["device"]  
  8.                 local devicedb = ngx.shared.devicedb  
  9.                 local res = devicedb:get(devicetype)  
  10.   
  11.                 ngx.say(res)  
  12.            ';  
  13.     }  
  14.   
  15.     location /update {  
  16.         default_type 'text/plain';  
  17.         content_by_lua '  
  18.                 local devicedb = ngx.shared.devicedb  
  19.   
  20.                 for item in io.lines("/usr/local/nginx-1.4.2/data/rule.txt") do  
  21.                     _,_,device_type, device_rule = string.find(item, "^(%a+)--(%a+)$")  
  22.                     devicedb:set(device_type,device_rule)  
  23.                 end  
  24.   
  25.                 ngx.say("ok")              
  26.            ';  
  27.     }  
    lua_package_path "/usr/local/share/luajit-2.0.2/jit?.lua;;";
    lua_shared_dict devicedb 45m; 
        location /query {
           default_type 'text/plain';
           content_by_lua '
                    local args = ngx.req.get_uri_args()
                    local devicetype = args["device"]
                    local devicedb = ngx.shared.devicedb
                    local res = devicedb:get(devicetype)

                    ngx.say(res)
               ';
        }

        location /update {
            default_type 'text/plain';
            content_by_lua '
                    local devicedb = ngx.shared.devicedb

                    for item in io.lines("/usr/local/nginx-1.4.2/data/rule.txt") do
                        _,_,device_type, device_rule = string.find(item, "^(%a+)--(%a+)$")
                        devicedb:set(device_type,device_rule)
                    end

                    ngx.say("ok")            
               ';
        }


rule.txt文件格式。

  1. SAMSUNG--samRule  
  2. APPLE--appRule  
  3. XIAOMI--xiaRule  
SAMSUNG--samRule
APPLE--appRule
XIAOMI--xiaRule

 

步骤1,访问/update,更新共享内存devicedb

步骤2,访问query?device=XIAOMI,返回xiaRule

步骤3,修改rule.txt,将xiaRule改为xiaRuleaaaa

步骤4,访问/update,更新共享内存devicedb

步骤5,访问query?device=XIAOMI,返回xiaRuleaaaa

内网响应时间在5~10ms。

 

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参考文章:

http://my.oschina.net/766/blog/158972

http://haili.me/archives/722.html

转自http://blog.csdn.net/lxb_champagne/article/details/17099383

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转载自hugoren.iteye.com/blog/2223736