Function dlrange

plugin/gif/context.go:73–87

(prefix string, end int, wg *sync.WaitGroup, exit func(error))

}

func dlrange(prefix string, end int, wg *sync.WaitGroup, exit func(error)) []string {
	if file.IsNotExist(datapath + `materials/` + prefix) {
		err := os.MkdirAll(datapath+`materials/`+prefix, 0755)
		if err != nil {
			exit(err)
			return nil
		}
	}
	c := make([]string, end)
	for i := range c {
		wg.Add(1)
		go dlchan(prefix+"/"+strconv.Itoa(i)+".png", &c[i], wg, exit)
	}
	return c
}

// 新的上下文
func newContext(user int64, atUser int64) *context {