altsvc.c (1892B)
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 with Alt-Svc support 26 * </DESC> 27 */ 28 #include <stdio.h> 29 #include <curl/curl.h> 30 31 int main(void) 32 { 33 CURL *curl; 34 CURLcode res; 35 36 curl = curl_easy_init(); 37 if(curl) { 38 curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); 39 40 /* cache the alternatives in this file */ 41 curl_easy_setopt(curl, CURLOPT_ALTSVC, "altsvc.txt"); 42 43 /* restrict which HTTP versions to use alternatives */ 44 curl_easy_setopt(curl, CURLOPT_ALTSVC_CTRL, (long) 45 CURLALTSVC_H1|CURLALTSVC_H2|CURLALTSVC_H3); 46 47 /* Perform the request, res gets the return code */ 48 res = curl_easy_perform(curl); 49 /* Check for errors */ 50 if(res != CURLE_OK) 51 fprintf(stderr, "curl_easy_perform() failed: %s\n", 52 curl_easy_strerror(res)); 53 54 /* always cleanup */ 55 curl_easy_cleanup(curl); 56 } 57 return 0; 58 }