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examples: add http3.c, altsvc.c and http3-present.c

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Closes #4221
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Daniel Stenberg 2019-08-13 11:24:50 +02:00
parent cc5fae5dac
commit f3c34bf83c
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4 changed files with 159 additions and 1 deletions
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3
docs/examples/Makefile.inc
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@ -35,7 +35,8 @@ check_PROGRAMS = 10-at-a-time anyauthput cookie_interface debug fileupload \
http2-upload http2-serverpush getredirect ftpuploadfrommem \
ftpuploadresume sslbackend postit2-formadd multi-formadd \
shared-connection-cache sftpuploadresume http2-pushinmemory parseurl \
urlapi imap-authzid pop3-authzid smtp-authzid
urlapi imap-authzid pop3-authzid smtp-authzid http3 altsvc \
http3-present
# These examples require external dependencies that may not be commonly
# available on POSIX systems, so don't bother attempting to compile them here.

56
docs/examples/altsvc.c Normal file
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@ -0,0 +1,56 @@
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
/* <DESC>
* HTTP with Alt-Svc support
* </DESC>
*/
#include <stdio.h>
#include <curl/curl.h>
int main(void)
{
CURL *curl;
CURLcode res;
curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* cache the alternatives in this file */
curl_easy_setopt(curl, CURLOPT_ALTSVC, "altsvc.txt");
/* restrict which HTTP versions to use alternatives */
curl_easy_setopt(curl, CURLOPT_ALTSVC_CTRL, (long)
CURLALTSVC_H1|CURLALTSVC_H2|CURLALTSVC_H3);
/* Perform the request, res will get the return code */
res = curl_easy_perform(curl);
/* Check for errors */
if(res != CURLE_OK)
fprintf(stderr, "curl_easy_perform() failed: %s\n",
curl_easy_strerror(res));
/* always cleanup */
curl_easy_cleanup(curl);
}
return 0;
}

47
docs/examples/http3-present.c Normal file
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@ -0,0 +1,47 @@
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
/* <DESC>
* Checks if HTTP/3 support is present in libcurl.
* </DESC>
*/
#include <stdio.h>
#include <curl/curl.h>
int main(void)
{
curl_version_info_data *ver;
curl_global_init(CURL_GLOBAL_ALL);
ver = curl_version_info(CURLVERSION_NOW);
if(ver->features & CURL_VERSION_HTTP2)
printf("HTTP/2 support is present\n");
if(ver->features & CURL_VERSION_HTTP3)
printf("HTTP/3 support is present\n");
if(ver->features & CURL_VERSION_ALTSVC)
printf("Alt-svc support is present\n");
curl_global_cleanup();
return 0;
}

54
docs/examples/http3.c Normal file
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@ -0,0 +1,54 @@
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.haxx.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
***************************************************************************/
/* <DESC>
* Very simple HTTP/3 GET
* </DESC>
*/
#include <stdio.h>
#include <curl/curl.h>
int main(void)
{
CURL *curl;
CURLcode res;
curl = curl_easy_init();
if(curl) {
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
/* Forcing HTTP/3 will make the connection fail if the server isn't
accessible over QUIC + HTTP/3 on the given host and port.
Consider using CURLOPT_ALTSVC instead! */
curl_easy_setopt(curl, CURLOPT_HTTP_VERSION, (long)CURL_HTTP_VERSION_3);
/* Perform the request, res will get the return code */
res = curl_easy_perform(curl);
/* Check for errors */
if(res != CURLE_OK)
fprintf(stderr, "curl_easy_perform() failed: %s\n",
curl_easy_strerror(res));
/* always cleanup */
curl_easy_cleanup(curl);
}
return 0;
}