logger.debug("Backup download requested: id={}", id);
        }

        if (stream(fessConfig.getIndexBackupAllTargets()).get(stream -> stream.anyMatch(s -> s.equals(id)))) {
            if ("system.properties".equals(id)) {
                return asStream(id).contentTypeOctetStream().stream(out -> {
                    try (final ByteArrayOutputStream baos = new ByteArrayOutputStream()) {

     */
    public boolean hasOpenSearchFile() {
        return osddFile != null;
    }

    /**
     * Returns the OSDD as a stream response.
     *
     * @return the stream response
     */
    public StreamResponse asStream() {
        if (osddFile == null) {
            throw ComponentUtil.getResponseManager().new404("Unsupported Open Search Description Document response.");
        }

        final String logFilePath = systemHelper.getLogFilePath();
        if (StringUtil.isNotBlank(logFilePath)) {
            final Path logDirPath = Paths.get(logFilePath);
            try (Stream<Path> stream = Files.list(logDirPath)) {
                stream.filter(entry -> isLogFilename(entry.getFileName().toString())).sorted().forEach(filePath -> {
                    final Map<String, Object> map = new HashMap<>();

     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public ActionResponse download(final DownloadForm form) {
        verifyToken(this::asDownloadHtml);

        return asStream("badword.csv").contentTypeOctetStream().stream(out -> {
            final Path tempFile = ComponentUtil.getSystemHelper().createTempFile("fess-badword-", ".csv").toPath();
            try {

                    op -> op.exclude(Stream.concat(Stream.of(Constants.COMMON_CONVERSION_RULE), Stream.of(Constants.PERMISSIONS))
                            .toArray(n -> new String[n])));
            final PermissionHelper permissionHelper = ComponentUtil.getPermissionHelper();
            entity.setPermissions(split(form.permissions, "\n").get(

            return null;
        }
        validate(form, messages -> {}, this::asListHtml);
        verifyTokenKeep(this::asListHtml);
        return asStream(file.getName()).contentTypeOctetStream().stream(out -> {
            try (FileInputStream fis = new FileInputStream(file)) {
                out.write(fis);
            }
        });
    }

    /**
     * Delete a design file.

        final String diagnosticId = "log" + new SimpleDateFormat("yyyyMMddHHmm").format(ComponentUtil.getSystemHelper().getCurrentTime());
        return asStream(diagnosticId + ".zip").contentTypeOctetStream().stream(out -> {
            try (ZipOutputStream zos = new ZipOutputStream(out.stream())) {
                writeLogFiles(zos, diagnosticId);
                writeSystemProperties(zos, diagnosticId);

        osddHelper.setContentType("application/opensearchdescription+xml");
        osddHelper.init();
        assertFalse(osddHelper.hasOpenSearchFile());

        try {
            osddHelper.asStream();
            fail();
        } catch (final Exception e) {
            assertEquals("Unsupported Open Search Description Document response.", e.getMessage());
        }
    }

    @Test

# Daten streamen { #stream-data }

Wenn Sie Daten streamen möchten, die als JSON strukturiert werden können, sollten Sie [JSON Lines streamen](../tutorial/stream-json-lines.md).

Wenn Sie jedoch **reine Binärdaten** oder Strings streamen möchten, so können Sie es machen.

/// info | Info

Hinzugefügt in FastAPI 0.134.0.

///

## Anwendungsfälle { #use-cases }

# Transmitir dados { #stream-data }

Se você quer transmitir dados que podem ser estruturados como JSON, você deveria [Transmitir JSON Lines](../tutorial/stream-json-lines.md).

Mas se você quer transmitir dados binários puros ou strings, veja como fazer.

/// info | Informação

Adicionado no FastAPI 0.134.0.

///

## Casos de uso { #use-cases }