1/***************************************************************************
2 *                                  _   _ ____  _
3 *  Project                     ___| | | |  _ \| |
4 *                             / __| | | | |_) | |
5 *                            | (__| |_| |  _ <| |___
6 *                             \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 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.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 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24/* <DESC>
25 * HTTP request with custom modified, removed and added headers
26 * </DESC>
27 */
28#include <stdio.h>
29#include <curl/curl.h>
30
31int main(void)
32{
33  CURL *curl;
34  CURLcode res;
35
36  curl = curl_easy_init();
37  if(curl) {
38    struct curl_slist *chunk = NULL;
39
40    /* Remove a header curl would otherwise add by itself */
41    chunk = curl_slist_append(chunk, "Accept:");
42
43    /* Add a custom header */
44    chunk = curl_slist_append(chunk, "Another: yes");
45
46    /* Modify a header curl otherwise adds differently */
47    chunk = curl_slist_append(chunk, "Host: example.com");
48
49    /* Add a header with "blank" contents to the right of the colon. Note that
50       we are then using a semicolon in the string we pass to curl! */
51    chunk = curl_slist_append(chunk, "X-silly-header;");
52
53    /* set our custom set of headers */
54    curl_easy_setopt(curl, CURLOPT_HTTPHEADER, chunk);
55
56    curl_easy_setopt(curl, CURLOPT_URL, "localhost");
57    curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
58
59    res = curl_easy_perform(curl);
60    /* Check for errors */
61    if(res != CURLE_OK)
62      fprintf(stderr, "curl_easy_perform() failed: %s\n",
63              curl_easy_strerror(res));
64
65    /* always cleanup */
66    curl_easy_cleanup(curl);
67
68    /* free the custom headers */
69    curl_slist_free_all(chunk);
70  }
71  return 0;
72}
73