CURLOPT_PROXY_TRANSFER_MODE

CURLOPT_PROXY_TRANSFER_MODE is one of the accepted parameters for curl_setopt parameter #2.

CURLOPT_PROXY_TRANSFER_MODE — Set to 1 to set the transfer mode (binary or ASCII) for FTP transfers done via an HTTP proxy, by appending type=a or type=i to the URL. Without this setting or it being set to 0, CURLOPT_TRANSFERTEXT has no effect when doing FTP via a proxy. Defaults to 0. Available as of cURL 7.18.0.

CURLOPT_PROXY_TRANSFER_MODE = 166;