OldalbumServiceProvider.java

    File downloadImageUrlToTempFile(AlbumEntry albumEntry, Path tempDir) {
        var imageUrl = albumEntry.getImageUrl();
        if (imageUrl == null || imageUrl.isEmpty()) {
            throw new OldAlbumException(String.format("Unable to download album entry matching id=%d, imageUrl is missing", albumEntry.getId()));
        }

        var fileName = findFileNamePartOfUrl(imageUrl);
        var tempfile = tempDir.resolve(fileName).toFile();
        IIOImage image = null;
        ImageWriter writer = null;
        try {
            HttpURLConnection connection = getConnectionFactory().connect(imageUrl);
            connection.setRequestMethod("GET");
            try(var inputStream = ImageIO.createImageInputStream(connection.getInputStream())) {
                var readers = ImageIO.getImageReaders(inputStream);
                if (readers.hasNext()) {
                    var reader = readers.next();
                    writer = ImageIO.getImageWriter(reader);
                    reader.setInput(inputStream);
                    image = reader.readAll(0, null);
                }
            }
        } catch (IOException e) {
            throw new OldAlbumException(String.format("Unable to download album entry matching id=%d from url=\"%s\"", albumEntry.getId(), albumEntry.getImageUrl()), e);
        }

        var metadata = image.getMetadata();
        var metadataAsTree = (IIOMetadataNode) metadata.getAsTree("javax_imageio_jpeg_image_1.0");
        findJfifCommentNode(metadataAsTree)
            .ifPresent(node -> node.setAttribute("value", albumEntry.getDescription()));
        Collection<Entry> entries = new ArrayList<>();
        var exifDateTimeFormat = new SimpleDateFormat("yyyy:MM:dd hh:mm:ss");
        exifDateTimeFormat.setTimeZone(TimeZone.getTimeZone("Europe/Oslo"));
        var datetime = exifDateTimeFormat.format(albumEntry.getLastModified());
        entries.add(new TIFFEntry(TIFF.TAG_DATE_TIME, datetime));
        var markerSequence = (IIOMetadataNode) metadataAsTree.getElementsByTagName("markerSequence").item(0);
        if (markerSequence == null) {
            markerSequence = new IIOMetadataNode("markerSequence");
            metadataAsTree.appendChild(markerSequence);
        }
        try (var bytes = new ByteArrayOutputStream()) {
            bytes.write("Exif".getBytes(StandardCharsets.US_ASCII));
            bytes.write(new byte[2]);
            new TIFFWriter().write(entries, new MemoryCacheImageOutputStream(bytes));
            IIOMetadataNode exif = new IIOMetadataNode("unknown");
            exif.setAttribute("MarkerTag", String.valueOf(0xE1)); // APP1 or "225"
            exif.setUserObject(bytes.toByteArray());
            markerSequence.appendChild(exif);
        } catch (IOException e) {
            throw new OldAlbumException(String.format("Failed to create EXIF structure when saving local copy of album entry matching id=%d from url=\"%s\"", albumEntry.getId(), albumEntry.getImageUrl()), e);
        }
        try (var outputStream = ImageIO.createImageOutputStream(new FileOutputStream(tempfile))){
            writer.setOutput(outputStream);
            var param = writer.getDefaultWriteParam();
            var modifiedMetadata = writer.getDefaultImageMetadata(ImageTypeSpecifiers.createFromRenderedImage(image.getRenderedImage()), param);
            modifiedMetadata.setFromTree("javax_imageio_jpeg_image_1.0", metadataAsTree);
            //modifiedMetadata.mergeTree("javax_imageio_jpeg_image_1.0", metadataAsTree);
            image.setMetadata(modifiedMetadata);
            writer.write(image);
            Files.setLastModifiedTime(tempfile.toPath(), FileTime.from(albumEntry.getLastModified().toInstant()));
            return tempfile;
        } catch (IOException e) {
            throw new OldAlbumException(String.format("Unable to save local copy of album entry matching id=%d from url=\"%s\"", albumEntry.getId(), albumEntry.getImageUrl()), e);
        }
    }