检查URL是否为目录

Question

我有这段代码来检查路径是目录还是文件。它适用于FTP，但不适用于SFTP。如何检查路径是否是目录不是libcurl文件？

bool IsDir(const wxString& path)
{ 

    wxString fullRemotePath = "sftp://user@server/home/user/";
    curl_easy_setopt(m_ftp, CURLOPT_URL, fullRemotePath.c_str().AsChar());
    curl_easy_setopt(m_ftp, CURLOPT_NOBODY, 1L);//No transfer
    m_rc = curl_easy_perform(m_ftp);

    //reset back to normal
    curl_easy_setopt(m_ftp, CURLOPT_NOBODY, 0L);

    return m_rc == CURLE_OK; //I expected it to fail on file, but it does not
}

卷曲版本为curl-7.43.0