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      1 /***************************************************************************
      2  *                                  _   _ ____  _
      3  *  Project                     ___| | | |  _ \| |
      4  *                             / __| | | | |_) | |
      5  *                            | (__| |_| |  _ <| |___
      6  *                             \___|\___/|_| \_\_____|
      7  *
      8  * Copyright (C) 1998 - 2016, 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  * Simple HTTP GET that stores the headers in a separate file
     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(void)
     39 {
     40   CURL *curl_handle;
     41   static const char *headerfilename = "head.out";
     42   FILE *headerfile;
     43   static const char *bodyfilename = "body.out";
     44   FILE *bodyfile;
     45 
     46   curl_global_init(CURL_GLOBAL_ALL);
     47 
     48   /* init the curl session */
     49   curl_handle = curl_easy_init();
     50 
     51   /* set URL to get */
     52   curl_easy_setopt(curl_handle, CURLOPT_URL, "http://example.com");
     53 
     54   /* no progress meter please */
     55   curl_easy_setopt(curl_handle, CURLOPT_NOPROGRESS, 1L);
     56 
     57   /* send all data to this function  */
     58   curl_easy_setopt(curl_handle, CURLOPT_WRITEFUNCTION, write_data);
     59 
     60   /* open the header file */
     61   headerfile = fopen(headerfilename, "wb");
     62   if(!headerfile) {
     63     curl_easy_cleanup(curl_handle);
     64     return -1;
     65   }
     66 
     67   /* open the body file */
     68   bodyfile = fopen(bodyfilename, "wb");
     69   if(!bodyfile) {
     70     curl_easy_cleanup(curl_handle);
     71     fclose(headerfile);
     72     return -1;
     73   }
     74 
     75   /* we want the headers be written to this file handle */
     76   curl_easy_setopt(curl_handle, CURLOPT_HEADERDATA, headerfile);
     77 
     78   /* we want the body be written to this file handle instead of stdout */
     79   curl_easy_setopt(curl_handle, CURLOPT_WRITEDATA, bodyfile);
     80 
     81   /* get it! */
     82   curl_easy_perform(curl_handle);
     83 
     84   /* close the header file */
     85   fclose(headerfile);
     86 
     87   /* close the body file */
     88   fclose(bodyfile);
     89 
     90   /* cleanup curl stuff */
     91   curl_easy_cleanup(curl_handle);
     92 
     93   return 0;
     94 }
     95