CURLOPT_PROXY_TRANSFER_MODE

Section: curl_easy_setopt options (3)
Updated: November 04, 2020
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NAME

CURLOPT_PROXY_TRANSFER_MODE - append FTP transfer mode to URL for proxy

SYNOPSIS

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXY_TRANSFER_MODE, long enabled);

DESCRIPTION

Pass a long. If the value is set to 1 (one), it tells libcurl 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 (zero, the default), CURLOPT_TRANSFERTEXT(3) has no effect when doing FTP via a proxy. Beware that not all proxies support this feature.

DEFAULT

0, disabled

PROTOCOLS

FTP over proxy

EXAMPLE

CURL *curl = curl_easy_init();
if(curl) {
  curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/old-server/file.txt");
  curl_easy_setopt(curl, CURLOPT_PROXY, "http://localhost:80");
  curl_easy_setopt(curl, CURLOPT_PROXY_TRANSFER_MODE, 1L);
  curl_easy_setopt(curl, CURLOPT_TRANSFERTEXT, 1L);
  ret = curl_easy_perform(curl);
  curl_easy_cleanup(curl);
}

AVAILABILITY

Added in 7.18.0

RETURN VALUE

Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if the enabled value is not supported.