/*************************************************************************** * _ _ ____ _ * Project ___| | | | _ \| | * / __| | | | |_) | | * | (__| |_| | _ <| |___ * \___|\___/|_| \_\_____| * * Copyright (C) 1998 - 2020, Daniel Stenberg, <daniel@haxx.se>, et al. * * This software is licensed as described in the file COPYING, which * you should have received as part of this distribution. The terms * are also available at https://curl.se/docs/copyright.html. * * You may opt to use, copy, modify, merge, publish, distribute and/or sell * copies of the Software, and permit persons to whom the Software is * furnished to do so, under the terms of the COPYING file. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ***************************************************************************/ #include <stdio.h> #include <curl/curl.h> /* <DESC> * Get a single file from an FTP server. * </DESC> */ struct FtpFile { const char *filename; FILE *stream; }; static size_t my_fwrite(void *buffer, size_t size, size_t nmemb, void *stream) { struct FtpFile *out = (struct FtpFile *)stream; if(!out->stream) { /* open file for writing */ out->stream = fopen(out->filename, "wb"); if(!out->stream) return -1; /* failure, can't open file to write */ } return fwrite(buffer, size, nmemb, out->stream); } int main(void) { CURL *curl; CURLcode res; struct FtpFile ftpfile = { "curl.tar.gz", /* name to store the file as if successful */ NULL }; curl_global_init(CURL_GLOBAL_DEFAULT); curl = curl_easy_init(); if(curl) { /* * You better replace the URL with one that works! */ curl_easy_setopt(curl, CURLOPT_URL, "ftp://ftp.example.com/curl/curl-7.9.2.tar.gz"); /* Define our callback to get called when there's data to be written */ curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, my_fwrite); /* Set a pointer to our struct to pass to the callback */ curl_easy_setopt(curl, CURLOPT_WRITEDATA, &ftpfile); /* Switch on full protocol/debug output */ curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L); res = curl_easy_perform(curl); /* always cleanup */ curl_easy_cleanup(curl); if(CURLE_OK != res) { /* we failed */ fprintf(stderr, "curl told us %d\n", res); } } if(ftpfile.stream) fclose(ftpfile.stream); /* close the local file */ curl_global_cleanup(); return 0; }