修改 aliyun，短信，oss,验证码

utility/captcha/captcha.go

@@ -0,0 +1,22 @@
+package captcha
+
+import (
+	"context"
+	afs "github.com/alibabacloud-go/afs-20180112/client"
+	"server/internal/model"
+)
+
+type CaptchaClient interface {
+	Vertify(ctx context.Context, client *afs.Client, in *model.CaptchaIn) (out string, err error)
+}
+
+var clients = make(map[string]CaptchaClient)
+
+func Register(name string, client CaptchaClient) {
+	clients[name] = client
+}
+
+func GetClient(name string) (CaptchaClient, bool) {
+	client, ok := clients[name]
+	return client, ok
+}