drizzle lua 数据传递(ngx.location.capture)

经常使用PHP开发的WEB开发人员，刚刚转到NGINX+DRIZZLE开发环境，开始估计会遇到LUA如何获取DRIZZLE+MYSQL返回数据的问题，下面给出我的一些经验。

首先修改NGINX的配置文件

location /mysql {
    set $name $1; 
    set_quote_sql_str $quote_name $name;
    set $sql "SELECT * FROM crawl WHERE id=3";
    drizzle_query $sql; drizzle_pass mysql; rds_json on; 
}

curl localhost:8080/mysql 返回的结果：[{"id":3,"url_id":"100","url_type":"item","date":"0000-00-00","url":"http://item.taobao.com/item.htm?id=100","status":0,"failures":0,"start_date":0,"unit_id":54848}]

然后在后面加入：

location /lua{
    content_by_lua '
       local res = ngx.location.capture("/mysql")
       ngx.say("data: " .. res.body)
    ';  
} 

curl localhost:8080/lua 返回的结果：data: [{"id":3,"url_id":"100","url_type":"item","date":"0000-00-00","url":"http://item.taobao.com/item.htm?id=100","status":0,"failures":0,"start_date":0,"unit_id":54848}]

最后大家也就都能猜到了

location /luafile {
  content_by_lua_file /usr/local/openresty/nginx/html/test.lua;
}

test.lua

local res = ngx.location.capture("/mysql")
ngx.say("data: " .. res.body)

搞定：curl localhost:8080/luafile 返回的结果：data: [{"id":3,"url_id":"100","url_type":"item","date":"0000-00-00","url":"http://item.taobao.com/item.htm?id=100","status":0,"failures":0,"start_date":0,"unit_id":54848}]