curl_easy_perform(3)            libcurl Manual            curl_easy_perform(3)

NAME
       curl_easy_perform - perform a blocking file transfer

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_perform(CURL *easy_handle);

DESCRIPTION
       Invoke this function after _easy_init&section=3">curl_easy_init(3) and all the
       _easy_setopt&section=3">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 _easy_init&section=3">curl_easy_init(3) call returned.

       _easy_perform&section=3">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
       _multi_perform&section=3">curl_multi_perform(3).

       You can do any amount of calls to _easy_perform&section=3">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 _easy_setopt&section=3">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
       _easy_perform&section=3">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
       _ERRORBUFFER&section=3">CURLOPT_ERRORBUFFER(3) was set with _easy_setopt&section=3">curl_easy_setopt(3) there will be a
       readable error message in the error buffer when non-zero is returned.

EXAMPLE
       CURL *curl = curl_easy_init();
       if(curl) {
         CURLcode res;
         curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
         res = curl_easy_perform(curl);
         curl_easy_cleanup(curl);
       }

SEE ALSO
       curl_easy_init(3), curl_easy_setopt(3),  curl_multi_add_handle(3),
       curl_multi_perform(3),  libcurl-errors(3),

libcurl 7.77.0                 November 4, 2020           curl_easy_perform(3)