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curl/docs/examples/multi-double.c
Daniel Stenberg ae8e11ed5f
docs/examples: use curl_multi_poll() in multi examples
The API is soon two years old and deserves being shown as the primary
way to drive multi code as it makes it much easier to write code.

multi-poll: removed

multi-legacy: add to show how we did multi API use before
curl_multi_wait/poll.

Closes #7352
2021-07-07 08:15:09 +02:00

96 lines
2.6 KiB
C

/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 1998 - 2021, 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.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>
* multi interface code doing two parallel HTTP transfers
* </DESC>
*/
#include <stdio.h>
#include <string.h>
/* somewhat unix-specific */
#include <sys/time.h>
#include <unistd.h>
/* curl stuff */
#include <curl/curl.h>
/*
* Simply download two HTTP files!
*/
int main(void)
{
CURL *http_handle;
CURL *http_handle2;
CURLM *multi_handle;
int still_running = 1; /* keep number of running handles */
http_handle = curl_easy_init();
http_handle2 = curl_easy_init();
/* set options */
curl_easy_setopt(http_handle, CURLOPT_URL, "https://www.example.com/");
/* set options */
curl_easy_setopt(http_handle2, CURLOPT_URL, "http://localhost/");
/* init a multi stack */
multi_handle = curl_multi_init();
/* add the individual transfers */
curl_multi_add_handle(multi_handle, http_handle);
curl_multi_add_handle(multi_handle, http_handle2);
while(still_running) {
CURLMsg *msg;
int queued;
CURLMcode mc = curl_multi_perform(multi_handle, &still_running);
if(still_running)
/* wait for activity, timeout or "nothing" */
mc = curl_multi_poll(multi_handle, NULL, 0, 1000, NULL);
if(mc)
break;
do {
msg = curl_multi_info_read(multi_handle, &queued);
if(msg) {
if(msg->msg == CURLMSG_DONE) {
/* a transfer ended */
fprintf(stderr, "Transfer completed\n");
}
}
} while(msg);
}
curl_multi_remove_handle(multi_handle, http_handle);
curl_multi_remove_handle(multi_handle, http_handle2);
curl_multi_cleanup(multi_handle);
curl_easy_cleanup(http_handle);
curl_easy_cleanup(http_handle2);
return 0;
}