alittle splitted mstorectl code; etc

app/imageoper/patchupload.go

@@ -0,0 +1,86 @@
+/*
+ * Copyright 2026 Oleg Borodin <onborodin@gmail.com>
+ *
+ * This work is published and licensed under a Creative Commons
+ * Attribution-NonCommercial-NoDerivatives 4.0 International License.
+ *
+ * Distribution of this work is permitted, but commercial use and
+ * modifications are strictly prohibited.
+ */
+package imageoper
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"net/http"
+	"strconv"
+)
+
+type PatchUploadParams struct {
+	ContentType   string
+	ContentLength string
+	ContentRange  string
+	Name          string
+	Reference     string
+	Reader        io.Reader
+}
+type PatchUploadResult struct {
+	Location string
+	Range    string
+}
+
+// TODO: partial uploading by range? Does anyone use this?
+func (oper *Operator) PatchUpload(ctx context.Context, operatorID string, params *PatchUploadParams) (*PatchUploadResult, int, error) {
+	var err error
+	res := &PatchUploadResult{}
+
+	if params.Reference == "" {
+		err = fmt.Errorf("Empty reference")
+		return res, http.StatusBadRequest, err
+	}
+	if params.Name == "" {
+		err = fmt.Errorf("Empty name")
+		return res, http.StatusBadRequest, err
+	}
+
+	exists, uploadSize, err := oper.store.UploadExists(params.Name, params.Reference)
+	if err != nil {
+		return res, http.StatusInternalServerError, err
+	}
+	if exists {
+		res.Location = fmt.Sprintf("/v2/%s/uploads/%s", params.Name, params.Reference)
+		res.Range = fmt.Sprintf("0-%d", uploadSize-1)
+		return res, http.StatusNoContent, err
+	}
+
+	if params.ContentType != "application/octet-stream" {
+		err = fmt.Errorf("Wrong Conten-Type header: %s", params.ContentType)
+		return res, http.StatusBadRequest, err
+	}
+	var contentLength int64
+
+	// Unfortunately, podman and github.com/containers/image don't sent
+	// Content-Length header for docker transport
+
+	if params.ContentLength != "" {
+		contentLength, err = strconv.ParseInt(params.ContentLength, 10, 64)
+		if err != nil {
+			err = fmt.Errorf("Wrong Content-length header")
+			return res, http.StatusBadRequest, err
+		}
+	}
+
+	recsize, _, err := oper.store.WriteUpload(params.Reference, params.Reader)
+	if err != nil {
+		return res, http.StatusInternalServerError, err
+	}
+	if contentLength != 0 && recsize != contentLength {
+		oper.store.RemoveUpload(params.Reference)
+		err = fmt.Errorf("Mismatch upload recorded size and content length")
+		return res, http.StatusInternalServerError, err
+	}
+	res.Location = fmt.Sprintf("/v2/%s/uploads/%s", params.Name, params.Reference)
+	res.Range = fmt.Sprintf("0-%d", recsize-1)
+	return res, http.StatusAccepted, err
+}