正则匹配链接和获取参数，利用lua根据参数指向不同location 代码块如下：

server  {
    listen 80;
    server_name  loc.lua.com;
    index index.php index.html;
    root  /var/www/course-front-api/public;
    location ~ ^(.*)/\.svn/ {
            return 404;break;
    }

    location = /request_body {
         client_max_body_size 50k;
         client_body_buffer_size 50k;

         content_by_lua_block {
            ngx.req.read_body()  -- explicitly read the req body
            local data = ngx.req.get_body_data()
            if data then
                 ngx.say("body data:")
                 ngx.print(data)
                 return
            end

            -- body may get buffered in a temp file:
            local file = ngx.req.get_body_file()
            if file then
                ngx.say("body is in file ", file)
            else
                ngx.say("no body found")
            end
         }
    }

    # rewrite ^/a_([0-9]+)\.html$ /index.php/?aid=$1 last;
    
    --匹配地址
    location ~ ^/a_([0-9]+)\.html$ {
        default_type 'text/plain';
        content_by_lua_block {
            local m, err = ngx.re.match(ngx.var.uri, "[0-9]+")
            if err then
                ngx.log(ngx.ERR, "error: ", err)
                return
            end
            -- ngx.say('Hello,world!',ngx.var.uri,m[0])
            -- 可以根据自己的需求，查库或者redis  
            local file = io.open("/var/www/aiops/docker/base_image/nginx/sites/id.txt",'r')

            if not file then
                ngx.say("can not open file")
            end

            local content = file:read('*all')
            file:close()
            -- ngx.say(content)
            -- json格式转化
            local json = require("cjson")
            local ids = json.decode(content)
            local tc = 0
            for i, v in pairs(ids.id) do
                if m[0] == v then
                    tc = 1
                    
                end    
            end
			--指向不同location
            if tc == 1 then
                ngx.exec("@bar")
            else
                ngx.exec("@two") 
            end
        }
    }


    location @bar {
        # MIME type determined by default_type:
        default_type 'text/plain';

        content_by_lua_block {
            ngx.say('Hello,world!')
        }
    }


    location @two {
        # MIME type determined by default_type:
        default_type 'text/plain';

        content_by_lua_block {
            ngx.say('Hello,world two!')
        }
    }

    

    location /nginx_status {
            stub_status  on;
            access_log   off;
    }

    location ~ /.ht {
            deny  all;
    }

    #access_log  off;
    error_log /var/log/nginx/loc.lua_error.log;
    access_log /var/log/nginx/loc.lua_access.log;
}