refactor: clean code

internal/pkg/sdk3rd/qiniu/auth.go

@@ -0,0 +1,29 @@
+package qiniusdk
+
+import (
+	"net/http"
+
+	"github.com/qiniu/go-sdk/v7/auth"
+)
+
+type transport struct {
+	http.RoundTripper
+	mac *auth.Credentials
+}
+
+func newTransport(mac *auth.Credentials, tr http.RoundTripper) *transport {
+	if tr == nil {
+		tr = http.DefaultTransport
+	}
+	return &transport{tr, mac}
+}
+
+func (t *transport) RoundTrip(req *http.Request) (resp *http.Response, err error) {
+	token, err := t.mac.SignRequestV2(req)
+	if err != nil {
+		return
+	}
+
+	req.Header.Set("Authorization", "Qiniu "+token)
+	return t.RoundTripper.RoundTrip(req)
+}