curl / libcurl / API / Examples / multi-poll.c

multi-poll.c

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 * Copyright (C) 1998 - 2019, Daniel Stenberg, <daniel@haxx.se>, et al.
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 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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 * furnished to do so, under the terms of the COPYING file.
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 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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/* <DESC>
 * single download with the multi interface's curl_multi_poll
 * </DESC>
 */ 
 
#include <stdio.h>
#include <string.h>
 
/* somewhat unix-specific */ 
#include <sys/time.h>
#include <unistd.h>
 
/* curl stuff */ 
#include <curl/curl.h>
 
int main(void)
{
  CURL *http_handle;
  CURLM *multi_handle;
  int still_running = 1; /* keep number of running handles */ 
 
  curl_global_init(CURL_GLOBAL_DEFAULT);
 
  http_handle = curl_easy_init();
 
  curl_easy_setopt(http_handle, CURLOPT_URL, "https://www.example.com/");
 
  multi_handle = curl_multi_init();
 
  curl_multi_add_handle(multi_handle, http_handle);
 
  while(still_running) {
    CURLMcode mc; /* curl_multi_poll() return code */ 
    int numfds;
 
    /* we start some action by calling perform right away */ 
    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, &numfds);
 
    if(mc != CURLM_OK) {
      fprintf(stderr, "curl_multi_wait() failed, code %d.\n", mc);
      break;
    }
  }
 
  curl_multi_remove_handle(multi_handle, http_handle);
  curl_easy_cleanup(http_handle);
  curl_multi_cleanup(multi_handle);
  curl_global_cleanup();
 
  return 0;
}