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      1 /***************************************************************************
      2  *                                  _   _ ____  _
      3  *  Project                     ___| | | |  _ \| |
      4  *                             / __| | | | |_) | |
      5  *                            | (__| |_| |  _ <| |___
      6  *                             \___|\___/|_| \_\_____|
      7  *
      8  * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel (at) haxx.se>, et al.
      9  *
     10  * This software is licensed as described in the file COPYING, which
     11  * you should have received as part of this distribution. The terms
     12  * are also available at https://curl.haxx.se/docs/copyright.html.
     13  *
     14  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
     15  * copies of the Software, and permit persons to whom the Software is
     16  * furnished to do so, under the terms of the COPYING file.
     17  *
     18  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
     19  * KIND, either express or implied.
     20  *
     21  ***************************************************************************/
     22 /* <DESC>
     23  * Download a given URL into a local file named page.out.
     24  * </DESC>
     25  */
     26 #include <stdio.h>
     27 #include <stdlib.h>
     28 #include <unistd.h>
     29 
     30 #include <curl/curl.h>
     31 
     32 static size_t write_data(void *ptr, size_t size, size_t nmemb, void *stream)
     33 {
     34   size_t written = fwrite(ptr, size, nmemb, (FILE *)stream);
     35   return written;
     36 }
     37 
     38 int main(int argc, char *argv[])
     39 {
     40   CURL *curl_handle;
     41   static const char *pagefilename = "page.out";
     42   FILE *pagefile;
     43 
     44   if(argc < 2) {
     45     printf("Usage: %s <URL>\n", argv[0]);
     46     return 1;
     47   }
     48 
     49   curl_global_init(CURL_GLOBAL_ALL);
     50 
     51   /* init the curl session */
     52   curl_handle = curl_easy_init();
     53 
     54   /* set URL to get here */
     55   curl_easy_setopt(curl_handle, CURLOPT_URL, argv[1]);
     56 
     57   /* Switch on full protocol/debug output while testing */
     58   curl_easy_setopt(curl_handle, CURLOPT_VERBOSE, 1L);
     59 
     60   /* disable progress meter, set to 0L to enable and disable debug output */
     61   curl_easy_setopt(curl_handle, CURLOPT_NOPROGRESS, 1L);
     62 
     63   /* send all data to this function  */
     64   curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, write_data);
     65 
     66   /* open the file */
     67   pagefile = fopen(pagefilename, "wb");
     68   if(pagefile) {
     69 
     70     /* write the page body to this file handle */
     71     curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, pagefile);
     72 
     73     /* get it! */
     74     curl_easy_perform(curl_handle);
     75 
     76     /* close the header file */
     77     fclose(pagefile);
     78   }
     79 
     80   /* cleanup curl stuff */
     81   curl_easy_cleanup(curl_handle);
     82 
     83   curl_global_cleanup();
     84 
     85   return 0;
     86 }
     87