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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 
write_data(void * ptr,size_t size,size_t nmemb,void * stream)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 
main(void)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 }
95