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Source Code File 06-01_mimeform.c

#include <stdio.h>
#include <stdlib.h>
#include <curl/curl.h>

int main()
{
    char address[] = "http://127.0.0.0/formsub.php";
    CURL *curl;
    CURLcode res;
    curl_mime *form = NULL;
    curl_mimepart *name_field = NULL;
    curl_mimepart *email_field = NULL;

    /* initialize curl */
    curl = curl_easy_init();
    
    /* create the form */
    form = curl_mime_init(curl);
        /* add the name field */
    name_field = curl_mime_addpart(form);
    curl_mime_name( name_field, "name");
    curl_mime_data( name_field, "George Washington",
            CURL_ZERO_TERMINATED);
        /* add the email field */
    email_field = curl_mime_addpart(form);
    curl_mime_name( email_field, "email");
    curl_mime_data( email_field, "gw@potus.gov",
            CURL_ZERO_TERMINATED);

    /* set curl options */
    curl_easy_setopt(curl, CURLOPT_MIMEPOST,form );
    curl_easy_setopt(curl, CURLOPT_URL,address );

    /* send the form to the page */
    res = curl_easy_perform(curl);
    if( res!=CURLE_OK )
    {
        fprintf(stderr, "Unable to upload form\n");
        exit(1);
    }

    /* cleanup */
    curl_easy_cleanup(curl);
        /* and release the form */
    curl_mime_free(form);

    return(0);
}

Notes

* The address[] string contains a placeholder address. Further the code assumes the field names.

* Wide version of this code (statements not split)