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| .TH CURLOPT_SSL_ENABLE_NPN 3 "19 Jun 2014" "libcurl 7.37.0" "curl_easy_setopt options" |
| .SH NAME |
| CURLOPT_SSL_ENABLE_NPN \- enable NPN |
| .SH SYNOPSIS |
| #include <curl/curl.h> |
| |
| CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSL_ENABLE_NPN, long npn); |
| .SH DESCRIPTION |
| Pass a long as parameter, 0 or 1 where 1 is for enable and 0 for disable. 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 negotiate http2. |
| .SH DEFAULT |
| 1, enabled |
| .SH PROTOCOLS |
| HTTP |
| .SH EXAMPLE |
| .nf |
| 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); |
| } |
| .fi |
| .SH AVAILABILITY |
| Added in 7.36.0 |
| .SH RETURN VALUE |
| Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not. |
| .SH "SEE ALSO" |
| .BR CURLOPT_SSL_ENABLE_ALPN "(3), " CURLOPT_SSL_OPTIONS "(3), " |
