125 lines
3.1 KiB
C
125 lines
3.1 KiB
C
|
/*****************************************************************************
|
||
|
|
* _ _ ____ _
|
||
|
|
* Project ___| | | | _ \| |
|
||
|
|
* / __| | | | |_) | |
|
||
|
|
* | (__| |_| | _ <| |___
|
||
|
|
* \___|\___/|_| \_\_____|
|
||
|
|
*
|
||
|
|
* $Id$
|
||
|
|
*
|
||
|
|
* A multi-threaded example that uses pthreads and fetches 4 remote files at
|
||
|
|
* once over HTTPS. The lock callbacks and stuff assume OpenSSL so far.
|
||
|
|
* Should be expanded to do optional GnuTLS style locking.
|
||
|
|
*
|
||
|
|
* OpenSSL docs for this: http://www.openssl.org/docs/crypto/threads.html
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <pthread.h>
|
||
|
|
#include <curl/curl.h>
|
||
|
|
#include <openssl/crypto.h>
|
||
|
|
|
||
|
|
/* we have this global to let the callback get easy access to it */
|
||
|
|
static pthread_mutex_t *lockarray;
|
||
|
|
|
||
|
|
static void lock_callback(int mode, int type, char *file, int line)
|
||
|
|
{
|
||
|
|
(void)file;
|
||
|
|
(void)line;
|
||
|
|
if (mode & CRYPTO_LOCK) {
|
||
|
|
pthread_mutex_lock(&(lockarray[type]));
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
pthread_mutex_unlock(&(lockarray[type]));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static unsigned long thread_id(void)
|
||
|
|
{
|
||
|
|
unsigned long ret;
|
||
|
|
|
||
|
|
ret=(unsigned long)pthread_self();
|
||
|
|
return(ret);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void init_locks(void)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
lockarray=(pthread_mutex_t *)OPENSSL_malloc(CRYPTO_num_locks() *
|
||
|
|
sizeof(pthread_mutex_t));
|
||
|
|
for (i=0; i<CRYPTO_num_locks(); i++) {
|
||
|
|
pthread_mutex_init(&(lockarray[i]),NULL);
|
||
|
|
}
|
||
|
|
|
||
|
|
CRYPTO_set_id_callback((unsigned long (*)())thread_id);
|
||
|
|
CRYPTO_set_locking_callback((void (*)())lock_callback);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void kill_locks(void)
|
||
|
|
{
|
||
|
|
int i;
|
||
|
|
|
||
|
|
CRYPTO_set_locking_callback(NULL);
|
||
|
|
for (i=0; i<CRYPTO_num_locks(); i++)
|
||
|
|
pthread_mutex_destroy(&(lockarray[i]));
|
||
|
|
|
||
|
|
OPENSSL_free(lockarray);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* List of URLs to fetch.*/
|
||
|
|
const char *urls[]= {
|
||
|
|
"https://www.sf.net/",
|
||
|
|
"https://www.openssl.org/",
|
||
|
|
"https://www.sf.net/",
|
||
|
|
"https://www.openssl.org/",
|
||
|
|
};
|
||
|
|
|
||
|
|
static void *pull_one_url(void *url)
|
||
|
|
{
|
||
|
|
CURL *curl;
|
||
|
|
|
||
|
|
curl = curl_easy_init();
|
||
|
|
curl_easy_setopt(curl, CURLOPT_URL, url);
|
||
|
|
/* this example doesn't verify the server's certificate, which means we
|
||
|
|
might be downloading stuff from an impostor */
|
||
|
|
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYPEER, 0);
|
||
|
|
curl_easy_setopt(curl, CURLOPT_SSL_VERIFYHOST, 0);
|
||
|
|
curl_easy_perform(curl); /* ignores error */
|
||
|
|
curl_easy_cleanup(curl);
|
||
|
|
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
int main(int argc, char **argv)
|
||
|
|
{
|
||
|
|
pthread_t tid[4];
|
||
|
|
int i;
|
||
|
|
int error;
|
||
|
|
(void)argc; /* we don't use any arguments in this example */
|
||
|
|
(void)argv;
|
||
|
|
|
||
|
|
init_locks();
|
||
|
|
|
||
|
|
for(i=0; i< 4; i++) {
|
||
|
|
error = pthread_create(&tid[i],
|
||
|
|
NULL, /* default attributes please */
|
||
|
|
pull_one_url,
|
||
|
|
(void *)urls[i]);
|
||
|
|
if(0 != error)
|
||
|
|
fprintf(stderr, "Couldn't run thread number %d, errno %d\n", i, error);
|
||
|
|
else
|
||
|
|
fprintf(stderr, "Thread %d, gets %s\n", i, urls[i]);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* now wait for all threads to terminate */
|
||
|
|
for(i=0; i< 4; i++) {
|
||
|
|
error = pthread_join(tid[i], NULL);
|
||
|
|
fprintf(stderr, "Thread %d terminated\n", i);
|
||
|
|
}
|
||
|
|
|
||
|
|
kill_locks();
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|