Imports github.com/astaxie/beego github.com/astaxie/beego/utils github.com/astaxie/beego/cache github.com/astaxie/beego/logs github.com/astaxie/beego/context github.com/goecology/muses/pkg/tpl/tplbeego Standard library imports image/png image image/color bytes html/template crypto/rand encoding/binary fmt io math net/http path strings sync time