multi-double.c

/***************************************************************************
 * _ _ ____ _
 * Project ___| | | | _ \| |
 * / __| | | | |_) | |
 * | (__| |_| | _ <| |___
 * \___|\___/|_| \_\_____|
 *
 * Copyright (C) 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.
 *
 * SPDX-License-Identifier: curl
 *
 ***************************************************************************/
/* <DESC>
 * multi interface code doing two parallel HTTP transfers
 * </DESC>
 */
#include <stdio.h>
#include <string.h>
 
/* curl stuff */
#include <curl/curl.h>
 
/*
 * Simply download two HTTP files!
 */
int main(void)
{
 CURL *http_handle;
 CURL *http_handle2;
 
 CURLcode res = curl_global_init(CURL_GLOBAL_ALL);
 if(res)
 return (int)res;
 
 http_handle = curl_easy_init();
 http_handle2 = curl_easy_init();
 
 if(http_handle &&
 http_handle2) {
 
 CURLM *multi_handle;
 
 /* 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();
 if(multi_handle) {
 
 int still_running = 1; /* keep number of running handles */
 
 /* 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);
 
 curl_global_cleanup();
 
 return 0;
}

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