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Source Code File 05-01_anonftp.c

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

int main()
{
    char ftp[] = "ftp://127.0.0.0/file.pdf";
    CURL *curl;
    CURLcode r;
    FILE *fh;
    char filename[] = "file.pdf";

    /* open output file */
    fh = fopen( filename, "wb");
    if( fh==NULL)
    {
        fprintf(stderr,
                "Can't create %s\n",
                filename
               );
        exit(1);
    }

    /* initialize curl */
    curl = curl_easy_init();
    
    printf("FTP...");
    /* set options for FPT fetch */
    curl_easy_setopt(curl,
            CURLOPT_URL, ftp);
    curl_easy_setopt(curl,
            CURLOPT_FOLLOWLOCATION, 1L);
    curl_easy_setopt(curl,
            CURLOPT_WRITEFUNCTION, NULL);
    curl_easy_setopt(curl,
            CURLOPT_WRITEDATA, fh);
    
    /* request-send upload */
    r = curl_easy_perform(curl);
    if( r!=CURLE_OK )
    {
        fprintf(stderr,"curl error: %s\n",
                curl_easy_strerror(r));
        fclose(fh);
        exit(1);
    }

    /* cleanup */
    curl_easy_cleanup(curl);
    fclose(fh);
    /* inform the user */
    printf("File '%s' written\n",filename);
    
    return(0);
}

Notes

* The url represented by the ftp[] string is legitimate, but works only if you have an anonymous FTP server on your computer. The filename part of the string is also assumed.

* Wide version of this code (statements not split)