'CURLINFO_COOKIELIST'
'CURLINFO_LASTSOCKET'
'CURLINFO_FTP_ENTRY_PATH'
'CURLINFO_REDIRECT_URL'
'CURLINFO_PRIMARY_IP'
'CURLINFO_APPCONNECT_TIME' 
'CURLINFO_CERTINFO'
'CURLINFO_CONDITION_UNMET' 