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    1: /***************************************************************************
    2:  *                                  _   _ ____  _
    3:  *  Project                     ___| | | |  _ \| |
    4:  *                             / __| | | | |_) | |
    5:  *                            | (__| |_| |  _ <| |___
    6:  *                             \___|\___/|_| \_\_____|
    7:  *
    8:  * Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@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, "https://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: }