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.

       An  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

       int main(void)
       {
         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_HTTP_VERSION(3), CURLOPT_SSLVERSION(3)