157 lines
4.3 KiB
C
157 lines
4.3 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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* Download many files in parallel, in the same thread.
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* </DESC>
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*/
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#ifndef _WIN32
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# include <unistd.h>
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#endif
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#include <curl/curl.h>
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static const char *urls[] = {
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"https://www.microsoft.com",
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"https://opensource.org",
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"https://www.google.com",
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"https://www.yahoo.com",
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"https://www.ibm.com",
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"https://www.mysql.com",
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"https://www.oracle.com",
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"https://www.ripe.net",
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"https://www.iana.org",
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"https://www.amazon.com",
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"https://www.netcraft.com",
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"https://www.heise.de",
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"https://www.chip.de",
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"https://www.ca.com",
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"https://www.cnet.com",
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"https://www.mozilla.org",
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"https://www.cnn.com",
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"https://www.wikipedia.org",
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"https://www.dell.com",
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"https://www.hp.com",
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"https://www.cert.org",
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"https://www.mit.edu",
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"https://www.nist.gov",
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"https://www.ebay.com",
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"https://www.playstation.com",
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"https://www.uefa.com",
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"https://www.ieee.org",
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"https://www.apple.com",
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"https://www.symantec.com",
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"https://www.zdnet.com",
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"https://www.fujitsu.com/global/",
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"https://www.supermicro.com",
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"https://www.hotmail.com",
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"https://www.ietf.org",
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"https://www.bbc.co.uk",
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"https://news.google.com",
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"https://www.foxnews.com",
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"https://www.msn.com",
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"https://www.wired.com",
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"https://www.sky.com",
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"https://www.usatoday.com",
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"https://www.cbs.com",
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"https://www.nbc.com/",
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"https://slashdot.org",
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"https://www.informationweek.com",
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"https://apache.org",
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"https://www.un.org",
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};
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#define MAX_PARALLEL 10 /* number of simultaneous transfers */
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#define NUM_URLS sizeof(urls)/sizeof(char *)
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static size_t write_cb(char *data, size_t n, size_t l, void *userp)
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{
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/* take care of the data here, ignored in this example */
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(void)data;
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(void)userp;
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return n*l;
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}
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static void add_transfer(CURLM *cm, unsigned int i, int *left)
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{
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CURL *eh = curl_easy_init();
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curl_easy_setopt(eh, CURLOPT_WRITEFUNCTION, write_cb);
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curl_easy_setopt(eh, CURLOPT_URL, urls[i]);
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curl_easy_setopt(eh, CURLOPT_PRIVATE, urls[i]);
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curl_multi_add_handle(cm, eh);
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(*left)++;
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}
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int main(void)
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{
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CURLM *cm;
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CURLMsg *msg;
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unsigned int transfers = 0;
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int msgs_left = -1;
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int left = 0;
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curl_global_init(CURL_GLOBAL_ALL);
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cm = curl_multi_init();
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/* Limit the amount of simultaneous connections curl should allow: */
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curl_multi_setopt(cm, CURLMOPT_MAXCONNECTS, (long)MAX_PARALLEL);
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for(transfers = 0; transfers < MAX_PARALLEL && transfers < NUM_URLS;
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transfers++)
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add_transfer(cm, transfers, &left);
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do {
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int still_alive = 1;
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curl_multi_perform(cm, &still_alive);
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while((msg = curl_multi_info_read(cm, &msgs_left))) {
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if(msg->msg == CURLMSG_DONE) {
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char *url;
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CURL *e = msg->easy_handle;
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curl_easy_getinfo(msg->easy_handle, CURLINFO_PRIVATE, &url);
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fprintf(stderr, "R: %d - %s <%s>\n",
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msg->data.result, curl_easy_strerror(msg->data.result), url);
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curl_multi_remove_handle(cm, e);
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curl_easy_cleanup(e);
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left--;
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}
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else {
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fprintf(stderr, "E: CURLMsg (%d)\n", msg->msg);
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}
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if(transfers < NUM_URLS)
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add_transfer(cm, transfers++, &left);
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}
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if(left)
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curl_multi_wait(cm, NULL, 0, 1000, NULL);
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} while(left);
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curl_multi_cleanup(cm);
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curl_global_cleanup();
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return EXIT_SUCCESS;
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}
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