SiaUtil.java 文件源码

public boolean download(String siaPath, Path destination) {
        LOGGER.info("downloading {}", siaPath);
//        final String dest = destination.toAbsolutePath().toString();
        final FileTime lastModified = SiaFileUtil.getFileTime(siaPath);

        final String tempFileName = destination.getFileName().toString() + ".tempdownload";
        Path tempFile = destination.getParent().resolve(tempFileName);
        final HttpResponse<String> downloadResult = siaCommand(SiaCommand.DOWNLOAD, ImmutableMap.of("destination", tempFile.toAbsolutePath().toString()), siaPath);
        final boolean noHosts = checkErrorFragment(downloadResult, NO_HOSTS);
        if (noHosts) {
            LOGGER.warn("unable to download file {} due to NO_HOSTS  ", siaPath);
            return false;
        }
        if (statusGood(downloadResult)) {
            try {
                Files.setLastModifiedTime(tempFile, lastModified);
                Files.move(tempFile, destination, StandardCopyOption.ATOMIC_MOVE);
                Files.setLastModifiedTime(destination, lastModified);
            } catch (IOException e) {
                throw new RuntimeException("unable to do atomic swap of file " + destination);
            }
            return true;
        }
        LOGGER.warn("unable to download siaPath {} for an unexpected reason: {} ", siaPath, downloadResult.getBody());
        return false;
    }