NAME

       curl_easy_perform - perform a blocking file transfer

SYNOPSIS

       #include <curl/curl.h>

       CURLcode curl_easy_perform(CURL *easy_handle);

DESCRIPTION

       curl_easy_perform(3)  performs  a  network  transfer in a blocking manner and returns when
       done, or earlier if it fails. For non-blocking behavior, see curl_multi_perform(3).

       Invoke this function after curl_easy_init(3) and all  the  curl_easy_setopt(3)  calls  are
       made, and it performs 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.

       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
       attempts to reuse existing connections  for  the  following  transfers,  thus  making  the
       operations faster, less CPU intense and using less network resources. You probably want to
       use  curl_easy_setopt(3)  between  the  invokes  to  set   options   for   the   following
       curl_easy_perform(3) call.

       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.

       A  network  transfer moves data to a peer or from a peer. An application tells libcurl how
       to receive data by setting the CURLOPT_WRITEFUNCTION(3) and CURLOPT_WRITEDATA(3)  options.
       To  tell  libcurl what data to send, there are a few more alternatives but two common ones
       are CURLOPT_READFUNCTION(3) and CURLOPT_POSTFIELDS(3).

       While  the  easy_handle  is  added  to  a   multi   handle,   it   cannot   be   used   by
       curl_easy_perform(3).

EXAMPLE

       int main(void)
       {
         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);
         }
       }

AVAILABILITY

       Always

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 is a readable error message stored 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)