Sftp server ‘ls’ command timeout

[Main-Tomi]

For the method of writeDirEntry, the method 'getLongName(f, shortName, options);' call 'resolveFileAttributes' to get attrs too. Using the attrs obtained earlier as parameters can reduce the time by half

protected void writeDirEntry(
            int id, DirectoryHandle dir, Map<String, Path> entries, Buffer buffer,
            int index, Path f, String shortName, LinkOption... options)
            throws IOException {
        boolean followLinks = resolvePathResolutionFollowLinks(SftpConstants.SSH_FXP_READDIR, "", f);
        Map<String, ?> attrs = resolveFileAttributes(
                f, SftpConstants.SSH_FILEXFER_ATTR_ALL, !followLinks, options);
        entries.put(shortName, f);

        SftpFileSystemAccessor accessor = getFileSystemAccessor();
        ServerSession session = getServerSession();
        accessor.putRemoteFileName(this, f, buffer, shortName, true);

        int version = getVersion();
        if (version == SftpConstants.SFTP_V3) {
            String longName = getLongName(f, shortName, options);
            accessor.putRemoteFileName(this, f, buffer, longName, false);

            if (log.isTraceEnabled()) {
                log.trace("writeDirEntry({} id={})[{}] - {} [{}]: {}", session, id, index, shortName, longName, attrs);
            }
        } else {
            if (log.isTraceEnabled()) {
                log.trace("writeDirEntry({} id={})[{}] - {}: {}", session, id, index, shortName, attrs);
            }
        }

        writeAttrs(buffer, attrs);
    }

[tomaswolf]

Good catch; thank you!