local sock = ngx.socket.tcp()
local ok,err = sock:connect('whois.cnnic.net.cn',43)
if not ok then
 ngx.say('Failed to connect whois server',err)
 return
end
sock:settimeout(5000)
local ok, err = sock:send("baidu.cn\r\n")
if not ok then
 ngx.say('Failed to send data to whois server', err)
 return
end
local line, err, partial = sock:receive('*a')
if not line then
 ngx.say('Failed to read a line', err)
 return
end
ngx.print(line)