added minimal image checker

pkg/filecli/checkfiles.go

@@ -21,7 +21,7 @@ func (cli *Client) CheckFiles(ctx context.Context, rawpath string) ([]byte, erro
 	}
 	uri := ref.CheckEP()
 
-	req, err := http.NewRequestWithContext(ctx, http.MethodGet, uri, nil)
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, uri, nil)
 	if err != nil {
 		return list, err
 	}

pkg/repocli/checkimg.go

@@ -0,0 +1,78 @@
+/*
+  * Copyright 2026 Oleg Borodin <onborodin@gmail.com>
+ *
+ *
+*/
+
+package repocli
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net/http"
+	"strconv"
+)
+
+func (cli *Client) CheckImages(ctx context.Context, rawrepo string) ([]string, error) {
+	var err error
+	list := make([]string, 0)
+	rawlist, err := cli.CheckImagesRaw(ctx, rawrepo)
+	err = json.Unmarshal(rawlist, &list)
+	if err != nil {
+		return list, err
+	}
+	if err != nil {
+		return list, err
+	}
+	return list, err
+}
+
+func (cli *Client) CheckImagesRaw(ctx context.Context, rawrepo string) ([]byte, error) {
+	var err error
+	res := make([]byte, 0)
+
+	ref, err := NewReferer(rawrepo)
+	if err != nil {
+		return res, err
+	}
+	uri := ref.CheckerEP()
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, uri, nil)
+	if err != nil {
+		return res, err
+	}
+	req.Header.Set("User-Agent", cli.userAgent)
+	req.Header.Set("Accept", "*/*")
+	resp, err := cli.httpClient.Do(req)
+	if err != nil {
+		return res, err
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode == http.StatusNotFound {
+		return res, err
+	}
+	if resp.StatusCode != http.StatusOK {
+		err := fmt.Errorf("Unxected response code %s", resp.Status)
+		return res, err
+	}
+
+	contentLength := resp.Header.Get("Content-Length")
+	if contentLength == "" {
+		err = errors.New("Empty Content-Length header")
+		return res, err
+	}
+	listSize, err := strconv.ParseInt(contentLength, 10, 64)
+	if err != nil {
+		return res, err
+	}
+	buffer := bytes.NewBuffer(nil)
+	recSize, err := Copy(ctx, buffer, resp.Body)
+	if listSize != recSize {
+		err := fmt.Errorf("Mismatch declared and actual size")
+		return res, err
+	}
+	res = buffer.Bytes()
+	return res, err
+}

pkg/repocli/referer.go

@@ -137,6 +137,11 @@ func (ref *Referer) CatalogEP() string {
 	return curl.String()
 }
 
+func (ref *Referer) CheckerEP() string {
+	curl := ref.urlobj.JoinPath("/v2/checker", ref.base)
+	return curl.String()
+}
+
 func (ref *Referer) Userinfo() (string, string) {
 	return ref.user, ref.pass
 }