NAME

       CURLOPT_HTTP09_ALLOWED - allow HTTP/0.9 response

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HTTP09_ALLOWED, long allowed);

DESCRIPTION

       Pass the long argument allowed set to 1L to allow HTTP/0.9 responses.

       A HTTP/0.9 response is a server response entirely without headers and only a body. You can
       connect to lots of random TCP services and still get a response that curl  might  consider
       to be HTTP/0.9!

DEFAULT

       curl allowed HTTP/0.9 responses by default before 7.66.0

       Since 7.66.0, libcurl requires this option set to 1L to allow HTTP/0.9 responses.

PROTOCOLS

       HTTP

EXAMPLE

       CURL *curl = curl_easy_init();
       if(curl) {
         CURLcode ret;
         curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
         curl_easy_setopt(curl, CURLOPT_HTTP09_ALLOWED, 1L);
         ret = curl_easy_perform(curl);
       }

AVAILABILITY

       Option added in 7.64.0, present along with HTTP.

RETURN VALUE

       Returns CURLE_OK if HTTP is supported, and CURLE_UNKNOWN_OPTION if not.

SEE ALSO

       CURLOPT_SSLVERSION(3), CURLOPT_HTTP_VERSION(3),