CURLOPT_HTTP_VERSION (3) Linux Manual Page

CURLOPT_HTTP_VERSION – specify HTTP protocol version to use

Synopsis

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_HTTP_VERSION, long version);

Description

Pass version a long, set to one of the values described below. They force libcurl to use the specific HTTP versions. This is not sensible to do unless you have a good reason. You have to set this option if you want to use libcurl’s HTTP/2 support.

CURL_HTTP_VERSION_NONE

We don’t care about what version the library uses. libcurl will use whatever it thinks fit.

CURL_HTTP_VERSION_1_0

Enforce HTTP 1.0 requests.

CURL_HTTP_VERSION_1_1

Enforce HTTP 1.1 requests.

CURL_HTTP_VERSION_2_0

Attempt HTTP 2.0 requests. libcurl will fall back to HTTP 1.x if HTTP 2.0 can’t be negotiated with the server.

Default

CURL_HTTP_VERSION_NONE

Protocols

HTTP

Example

TODO

Availability

Along with HTTP

Return Value

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

See Also

CURLOPT_SSLVERSION(3), CURLOPT_HTTP200ALIASES(3),