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CURLOPT_USE_SSL

Section: curl_easy_setopt options (3)
Updated: 19 Jun 2014
Index Return to Main Contents
 

NAME

CURLOPT_USE_SSL - request using SSL / TLS for the transfer  

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_USE_SSL, long level);  

DESCRIPTION

Pass a long using one of the values from below, to make libcurl use your desired level of SSL for the transfer.

These are all protocols that start out plain text and get "upgraded" to SSL using the STARTTLS command.

This is for enabling SSL/TLS when you use FTP, SMTP, POP3, IMAP etc.

CURLUSESSL_NONE
Don't attempt to use SSL.
CURLUSESSL_TRY
Try using SSL, proceed as normal otherwise.
CURLUSESSL_CONTROL
Require SSL for the control connection or fail with CURLE_USE_SSL_FAILED.
CURLUSESSL_ALL
Require SSL for all communication or fail with CURLE_USE_SSL_FAILED.
 

DEFAULT

CURLUSESSL_NONE  

PROTOCOLS

FTP, SMTP, POP3, IMAP  

EXAMPLE

CURL *curl = curl_easy_init();
if(curl) {
  curl_easy_setopt(curl, CURLOPT_URL, "ftp://example.com/dir/file.ext");

  /* require use of SSL for this, or fail */
  curl_easy_setopt(curl, CURLOPT_USE_SSL, CURLUSESSL_ALL);

  /* Perform the request */
  curl_easy_perform(curl);
}
 

AVAILABILITY

Added in 7.11.0. This option was known as CURLOPT_FTP_SSL up to 7.16.4, and the constants were known as CURLFTPSSL_*  

RETURN VALUE

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

SEE ALSO

CURLOPT_SSLVERSION(3), CURLOPT_SSL_OPTIONS(3),


 

Index

NAME
SYNOPSIS
DESCRIPTION
DEFAULT
PROTOCOLS
EXAMPLE
AVAILABILITY
RETURN VALUE
SEE ALSO


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