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df70a68984
Build these examples when the necessary dependencies are present:
- cacertinmem, usercertinmem (OpenSSL/fork)
- multi-uv (libuv)
- multithread, threaded-ssl (pthread)
- sessioninfo (GnuTLS)
Indicate the necessary dependency via a `Required:` comment placed in
the source file. A single dependency per source is supported as of now.
The name of the dependency should match the variable used within
the cmake scripts, which in turn matches the macro used in the config
header. E.g. for GnuTLS it's `USE_GNUTLS`.
Also:
- GHA/macos: build examples in two job to test GnuTLS and pthread ones.
- GHA/linux: enable libuv to test it with examples.
Follow-up to 6bb7714032 #18914
Closes #18909
102 lines
3.2 KiB
C
102 lines
3.2 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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/* <DESC>
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* Show the required mutex callback setups for GnuTLS and OpenSSL when using
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* libcurl multi-threaded.
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* </DESC>
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*/
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/* A multi-threaded example that uses pthreads and fetches 4 remote files at
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* once over HTTPS.
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*
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* Recent versions of OpenSSL and GnuTLS are thread safe by design, assuming
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* support for the underlying OS threading API is built-in. Older revisions
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* of this example demonstrated locking callbacks for the SSL library, which
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* are no longer necessary. An older revision with callbacks can be found at
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* https://github.com/curl/curl/blob/curl-7_88_1/docs/examples/threaded-ssl.c
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*/
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/* Requires: HAVE_PTHREAD_H */
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/* Also requires TLS support to run */
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#include <stdio.h>
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#include <pthread.h>
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#include <curl/curl.h>
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#define NUMT 4
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/* List of URLs to fetch.*/
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static const char * const urls[]= {
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"https://www.example.com/",
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"https://www2.example.com/",
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"https://www3.example.com/",
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"https://www4.example.com/",
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};
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static void *pull_one_url(void *pindex)
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{
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int i = *(int *)pindex;
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CURL *curl;
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curl = curl_easy_init();
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curl_easy_setopt(curl, CURLOPT_URL, urls[i]);
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/* this example does not verify the server's certificate, which means we
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might be downloading stuff from an impostor */
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curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0L);
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curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0L);
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curl_easy_perform(curl); /* ignores error */
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curl_easy_cleanup(curl);
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return NULL;
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}
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int main(int argc, char **argv)
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{
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pthread_t tid[NUMT];
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int i;
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(void)argc;
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(void)argv;
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/* Must initialize libcurl before any threads are started */
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curl_global_init(CURL_GLOBAL_ALL);
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for(i = 0; i < NUMT; i++) {
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int error = pthread_create(&tid[i],
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NULL, /* default attributes please */
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pull_one_url,
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(void *)&i);
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if(error)
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fprintf(stderr, "Couldn't run thread number %d, errno %d\n", i, error);
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else
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fprintf(stderr, "Thread %d, gets %s\n", i, urls[i]);
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}
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/* now wait for all threads to terminate */
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for(i = 0; i < NUMT; i++) {
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pthread_join(tid[i], NULL);
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fprintf(stderr, "Thread %d terminated\n", i);
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}
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return 0;
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}
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