NAME

       curl_formget - serialize a previously built multipart/formdata HTTP POST chain

SYNOPSIS

       #include <curl/curl.h>

       int curl_formget(struct curl_httppost * form, void *userp,
                         curl_formget_callback append );

DESCRIPTION

       curl_formget()  is  used to serialize data previously built/appended with curl_formadd(3).
       Accepts a void pointer as second argument named userp which will be passed  as  the  first
       argument to the curl_formget_callback function.

       typedef size_t (*curl_formget_callback)(void *userp, const char *buf,  size_t len);

       The  curl_formget_callback  will  be  executed  for  each part of the HTTP POST chain. The
       character buffer passed to the callback must not be freed. The callback should return  the
       buffer length passed to it on success.

       If  the  CURLFORM_STREAM  option  is used in the formpost, it will prevent curl_formget(3)
       from working until you've performed the actual HTTP request as only then will libcurl  get
       the actual read callback to use!

RETURN VALUE

       0 means everything was ok, non-zero means an error occurred

EXAMPLE

        size_t print_httppost_callback(void *arg, const char *buf, size_t len)
        {
          fwrite(buf, len, 1, stdout);
          (*(size_t *) arg) += len;
          return len;
        }

        size_t print_httppost(struct curl_httppost *post)
        {
          size_t total_size = 0;
          if(curl_formget(post, &total_size, print_httppost_callback)) {
            return (size_t) -1;
          }
          return total_size;
        }

AVAILABILITY

       This function was added in libcurl 7.15.5

SEE ALSO

       curl_formadd(3)