curl_formget(3)                 libcurl Manual                 curl_formget(3)

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
       _formadd&section=3">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
       _formget&section=3">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. The form API is deprecated
       in libcurl 7.56.0.

SEE ALSO
       curl_formadd(3), curl_mime_init(3)

libcurl 7.77.0                 November 5, 2020                curl_formget(3)