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CURLOPT_SSL_ENABLE_NPN(3)  curl_easy_setopt options  CURLOPT_SSL_ENABLE_NPN(3)

NAME
       CURLOPT_SSL_ENABLE_NPN -	enable NPN

SYNOPSIS
       #include	<curl/curl.h>

       CURLcode	 curl_easy_setopt(CURL	*handle,  CURLOPT_SSL_ENABLE_NPN, long
       npn);

DESCRIPTION
       Pass a long as parameter, 0 or 1	where 1	is for enable and 0  for  dis-
       able. This option enables/disables NPN in the SSL handshake (if the SSL
       backend libcurl is built	to use supports	it), which can be used to  ne-
       gotiate http2.

DEFAULT
       1, enabled

PROTOCOLS
       HTTP

EXAMPLE
       CURL *curl = curl_easy_init();
       if(curl)	{
	 curl_easy_setopt(curl,	CURLOPT_URL, "https://example.com/");
	 curl_easy_setopt(curl,	CURLOPT_SSL_ENABLE_NPN,	1L);
	 ret = curl_easy_perform(curl);
	 curl_easy_cleanup(curl);
       }

AVAILABILITY
       Added in	7.36.0

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

SEE ALSO
       CURLOPT_SSL_ENABLE_ALPN(3), CURLOPT_SSL_OPTIONS(3),

libcurl	7.54.1			 May 31, 2017	     CURLOPT_SSL_ENABLE_NPN(3)

NAME | SYNOPSIS | DESCRIPTION | DEFAULT | PROTOCOLS | EXAMPLE | AVAILABILITY | RETURN VALUE | SEE ALSO

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