Imports github.com/afocus/captcha github.com/astaxie/beego github.com/astaxie/beego/cache github.com/astaxie/beego/cache/redis github.com/garyburd/redigo/redis github.com/gomodule/redigo/redis github.com/micro/go-log Standard library imports context encoding/json image/color renting/GetImageCd/proto/example renting/IhomeWeb/utils time