CURLOPT_HTTP09_ALLOWED - Man Page

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),

Referenced By

curl_easy_setopt(3), CURLOPT_HTTP_VERSION(3).

August 05, 2019 libcurl 7.70.0 curl_easy_setopt options