NAME¶

CURLOPT_HTTP09 - 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),