1 /***************************************************************************
2 * _ _ ____ _
3 * Project ___| | | | _ \| |
4 * / __| | | | |_) | |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2019, 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 * HTTP request with custom modified, removed and added headers
24 * </DESC>
25 */
26 #include <stdio.h>
27 #include <curl/curl.h>
28
main(void)29 int main(void)
30 {
31 CURL *curl;
32 CURLcode res;
33
34 curl = curl_easy_init();
35 if(curl) {
36 struct curl_slist *chunk = NULL;
37
38 /* Remove a header curl would otherwise add by itself */
39 chunk = curl_slist_append(chunk, "Accept:");
40
41 /* Add a custom header */
42 chunk = curl_slist_append(chunk, "Another: yes");
43
44 /* Modify a header curl otherwise adds differently */
45 chunk = curl_slist_append(chunk, "Host: example.com");
46
47 /* Add a header with "blank" contents to the right of the colon. Note that
48 we're then using a semicolon in the string we pass to curl! */
49 chunk = curl_slist_append(chunk, "X-silly-header;");
50
51 /* set our custom set of headers */
52 curl_easy_setopt(curl, CURLOPT_HTTPHEADER, chunk);
53
54 curl_easy_setopt(curl, CURLOPT_URL, "localhost");
55 curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
56
57 res = curl_easy_perform(curl);
58 /* Check for errors */
59 if(res != CURLE_OK)
60 fprintf(stderr, "curl_easy_perform() failed: %s\n",
61 curl_easy_strerror(res));
62
63 /* always cleanup */
64 curl_easy_cleanup(curl);
65
66 /* free the custom headers */
67 curl_slist_free_all(chunk);
68 }
69 return 0;
70 }
71