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
main(void)31 int 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
