cURL / libcurl / API / Examples / url2file.c

url2file.c

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/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2016, 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.haxx.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.
 *
 ***************************************************************************/ 
/* <DESC>
 * Download a given URL into a local file named page.out.
 * </DESC>
 */ 
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
 
#include <curl/curl.h>
 
static size_t write_data(void *ptr, size_t size, size_t nmemb, void *stream)
{
  size_t written = fwrite(ptr, size, nmemb, (FILE *)stream);
  return written;
}
 
int main(int argc, char *argv[])
{
  CURL *curl_handle;
  static const char *pagefilename = "page.out";
  FILE *pagefile;
 
  if(argc < 2) {
    printf("Usage: %s <URL>\n", argv[0]);
    return 1;
  }
 
  curl_global_init(CURL_GLOBAL_ALL);
 
  /* init the curl session */ 
  curl_handle = curl_easy_init();
 
  /* set URL to get here */ 
  curl_easy_setopt(curl_handle, CURLOPT_URL, argv[1]);
 
  /* Switch on full protocol/debug output while testing */ 
  curl_easy_setopt(curl_handle, CURLOPT_VERBOSE, 1L);
 
  /* disable progress meter, set to 0L to enable and disable debug output */ 
  curl_easy_setopt(curl_handle, CURLOPT_NOPROGRESS, 1L);
 
  /* send all data to this function  */ 
  curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, write_data);
 
  /* open the file */ 
  pagefile = fopen(pagefilename, "wb");
  if(pagefile) {
 
    /* write the page body to this file handle */ 
    curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, pagefile);
 
    /* get it! */ 
    curl_easy_perform(curl_handle);
 
    /* close the header file */ 
    fclose(pagefile);
  }
 
  /* cleanup curl stuff */ 
  curl_easy_cleanup(curl_handle);
 
  return 0;
}