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CURLOPT_P...NSFER_MODE(3)  Library Functions Manual  CURLOPT_P...NSFER_MODE(3)

NAME
       CURLOPT_PROXY_TRANSFER_MODE - append FTP	transfer mode to URL for proxy

SYNOPSIS
       #include	<curl/curl.h>

       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 set-
       ting, 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
       This functionality affects all supported	protocols

EXAMPLE
       int main(void)
       {
	 CURL *curl = curl_easy_init();
	 if(curl) {
	   CURLcode res;
	   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);
	   res = curl_easy_perform(curl);
	   curl_easy_cleanup(curl);
	 }
       }

AVAILABILITY
       Added in	curl 7.18.0

RETURN VALUE
       curl_easy_setopt(3) returns a CURLcode indicating success or error.

       CURLE_OK	(0) means everything was OK, non-zero means an error occurred,
       see libcurl-errors(3).

SEE ALSO
       CURLOPT_CRLF(3),	  CURLOPT_HTTPPROXYTUNNEL(3),  CURLOPT_PROXY(3),  CUR-
       LOPT_TRANSFERTEXT(3)

libcurl				  2025-06-03	     CURLOPT_P...NSFER_MODE(3)

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