EXAMPLE - Image Filter Effects

client := tcloud.NewClient(appid, appkey, connTimeout, transportTimeout, maxCoonPerHost, maxIdleCoons)
data, err := ioutil.ReadFile("example.jpg")
if err != nil {
  log.Fatal(err)
}

req := &FilterRequest{4, []byte(base64.StdEncoding.EncodeToString(data))}
res, err := client.Filter(req)
if err != nil {
  log.Fatal(err)
}
// done!
log.Info(res)