reimplement chunked uploads

server/images.go

@@ -1173,7 +1173,6 @@ func checkBlobExistence(ctx context.Context, mp ModelPath, digest string, regOpt
 func uploadBlobChunked(ctx context.Context, mp ModelPath, url string, layer *Layer, regOpts *RegistryOptions, fn func(api.ProgressResponse)) error {
 	// TODO allow resumability
 	// TODO allow canceling uploads via DELETE
-	// TODO allow cross repo blob mount
 
 	fp, err := GetBlobsPath(layer.Digest)
 	if err != nil {
@@ -1186,11 +1185,19 @@ func uploadBlobChunked(ctx context.Context, mp ModelPath, url string, layer *Lay
 	}
 	defer f.Close()
 
-	totalUploaded := 0
+	completed := 0
+	chunkSize := 10 * 1024 * 1024
 
+	for {
 		r, w := io.Pipe()
 		defer r.Close()
 
+		limit := completed + chunkSize
+		if chunkSize >= layer.Size-completed {
+			limit = layer.Size
+			chunkSize = layer.Size - completed
+		}
+
 		go func() {
 			defer w.Close()
 			for {
@@ -1200,35 +1207,56 @@ func uploadBlobChunked(ctx context.Context, mp ModelPath, url string, layer *Lay
 						Status:    fmt.Sprintf("error copying pipe: %v", err),
 						Digest:    layer.Digest,
 						Total:     layer.Size,
-					Completed: totalUploaded,
+						Completed: completed,
 					})
 					return
 				}
 
-			totalUploaded += int(n)
+				completed += int(n)
 
 				fn(api.ProgressResponse{
 					Status:    fmt.Sprintf("uploading %s", layer.Digest),
 					Digest:    layer.Digest,
 					Total:     layer.Size,
-				Completed: totalUploaded,
+					Completed: completed,
 				})
 
-			if totalUploaded >= layer.Size {
+				if completed >= limit {
 					return
 				}
 			}
 		}()
 
+		headers := make(map[string]string)
+		headers["Content-Type"] = "application/octet-stream"
+		headers["Content-Length"] = strconv.Itoa(chunkSize)
+		headers["Content-Range"] = fmt.Sprintf("%d-%d", completed, limit-1)
+
+		resp, err := makeRequest(ctx, "PATCH", url, headers, r, regOpts)
+		if err != nil {
+			return err
+		}
+		defer resp.Body.Close()
+
+		if resp.StatusCode != http.StatusAccepted {
+			body, _ := io.ReadAll(resp.Body)
+			return fmt.Errorf("on finish upload registry responded with code %d: %v", resp.StatusCode, string(body))
+		}
+
+		url = resp.Header.Get("Location")
+		if completed >= layer.Size {
+			break
+		}
+	}
+
 	url = fmt.Sprintf("%s&digest=%s", url, layer.Digest)
 
 	headers := make(map[string]string)
 	headers["Content-Type"] = "application/octet-stream"
-	headers["Content-Range"] = fmt.Sprintf("0-%d", layer.Size-1)
-	headers["Content-Length"] = strconv.Itoa(int(layer.Size))
+	headers["Content-Length"] = "0"
 
 	// finish the upload
-	resp, err := makeRequest(ctx, "PUT", url, headers, r, regOpts)
+	resp, err := makeRequest(ctx, "PUT", url, headers, nil, regOpts)
 	if err != nil {
 		log.Printf("couldn't finish upload: %v", err)
 		return err