NAME¶
curl_easy_perform - Perform a file transfer
SYNOPSIS¶
#include <curl/curl.h>
CURLcode curl_easy_perform(CURL *easy_handle);
DESCRIPTION¶
Invoke this function after
curl_easy_init(3) and all the
curl_easy_setopt(3) calls are made, and will perform the transfer as
described in the options. It must be called with the same
easy_handle
as input as the
curl_easy_init(3) call returned.
curl_easy_perform(3) performs the entire request in a blocking manner and
returns when done, or if it failed. For non-blocking behavior, see
curl_multi_perform(3).
You can do any amount of calls to
curl_easy_perform(3) while using the
same
easy_handle. If you intend to transfer more than one file, you are
even encouraged to do so. libcurl will then attempt to re-use the same
connection for the following transfers, thus making the operations faster,
less CPU intense and using less network resources. Just note that you will
have to use
curl_easy_setopt(3) between the invokes to set options for
the following curl_easy_perform.
You must never call this function simultaneously from two places using the same
easy_handle. Let the function return first before invoking it another
time. If you want parallel transfers, you must use several curl easy_handles.
While the
easy_handle is added to a multi handle, it cannot be used by
curl_easy_perform(3).
RETURN VALUE¶
CURLE_OK (0) means everything was ok, non-zero means an error occurred as
<curl/curl.h> defines - see
libcurl-errors(3). If the
CURLOPT_ERRORBUFFER(3) was set with
curl_easy_setopt(3) there
will be a readable error message in the error buffer when non-zero is
returned.
SEE ALSO¶
curl_easy_init(3),
curl_easy_setopt(3),
curl_multi_add_handle(3),
curl_multi_perform(3),
libcurl-errors(3),