altsvc.c 1.8 KB

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  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 with Alt-Svc support
  24. * </DESC>
  25. */
  26. #include <stdio.h>
  27. #include <curl/curl.h>
  28. int main(void)
  29. {
  30. CURL *curl;
  31. CURLcode res;
  32. curl = curl_easy_init();
  33. if(curl) {
  34. curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
  35. /* cache the alternatives in this file */
  36. curl_easy_setopt(curl, CURLOPT_ALTSVC, "altsvc.txt");
  37. /* restrict which HTTP versions to use alternatives */
  38. curl_easy_setopt(curl, CURLOPT_ALTSVC_CTRL, (long)
  39. CURLALTSVC_H1|CURLALTSVC_H2|CURLALTSVC_H3);
  40. /* Perform the request, res will get the return code */
  41. res = curl_easy_perform(curl);
  42. /* Check for errors */
  43. if(res != CURLE_OK)
  44. fprintf(stderr, "curl_easy_perform() failed: %s\n",
  45. curl_easy_strerror(res));
  46. /* always cleanup */
  47. curl_easy_cleanup(curl);
  48. }
  49. return 0;
  50. }