185 строки
4.4 KiB
C
185 строки
4.4 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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*
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* Example application source code using the multi interface to download many
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* files, but with a capped maximum amount of simultaneous transfers.
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*
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* Written by Michael Wallner
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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/multi.h>
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static const char *urls[] = {
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"http://www.microsoft.com",
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"http://www.opensource.org",
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"http://www.google.com",
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"http://www.yahoo.com",
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"http://www.ibm.com",
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"http://www.mysql.com",
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"http://www.oracle.com",
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"http://www.ripe.net",
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"http://www.iana.org",
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"http://www.amazon.com",
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"http://www.netcraft.com",
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"http://www.heise.de",
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"http://www.chip.de",
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"http://www.ca.com",
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"http://www.cnet.com",
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"http://www.news.com",
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"http://www.cnn.com",
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"http://www.wikipedia.org",
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"http://www.dell.com",
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"http://www.hp.com",
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"http://www.cert.org",
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"http://www.mit.edu",
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"http://www.nist.gov",
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"http://www.ebay.com",
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"http://www.playstation.com",
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"http://www.uefa.com",
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"http://www.ieee.org",
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"http://www.apple.com",
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"http://www.sony.com",
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"http://www.symantec.com",
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"http://www.zdnet.com",
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"http://www.fujitsu.com",
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"http://www.supermicro.com",
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"http://www.hotmail.com",
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"http://www.ecma.com",
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"http://www.bbc.co.uk",
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"http://news.google.com",
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"http://www.foxnews.com",
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"http://www.msn.com",
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"http://www.wired.com",
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"http://www.sky.com",
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"http://www.usatoday.com",
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"http://www.cbs.com",
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"http://www.nbc.com",
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"http://slashdot.org",
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"http://www.bloglines.com",
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"http://www.techweb.com",
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"http://www.newslink.org",
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"http://www.un.org",
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};
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#define MAX 10 /* number of simultaneous transfers */
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#define CNT sizeof(urls)/sizeof(char*) /* total number of transfers to do */
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static size_t cb(char *d, size_t n, size_t l, void *p)
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{
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/* take care of the data here, ignored in this example */
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(void)d;
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(void)p;
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return n*l;
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}
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static void init(CURLM *cm, int i)
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{
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CURL *eh = curl_easy_init();
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curl_easy_setopt(eh, CURLOPT_WRITEFUNCTION, cb);
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curl_easy_setopt(eh, CURLOPT_HEADER, 0L);
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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_easy_setopt(eh, CURLOPT_VERBOSE, 0L);
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curl_multi_add_handle(cm, eh);
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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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long L;
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unsigned int C=0;
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int M, Q, U = -1;
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fd_set R, W, E;
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struct timeval T;
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curl_global_init(CURL_GLOBAL_ALL);
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cm = curl_multi_init();
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/* we can optionally limit the total amount of connections this multi handle
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uses */
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curl_multi_setopt(cm, CURLMOPT_MAXCONNECTS, (long)MAX);
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for (C = 0; C < MAX; ++C) {
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init(cm, C);
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}
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while (U) {
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curl_multi_perform(cm, &U);
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if (U) {
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FD_ZERO(&R);
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FD_ZERO(&W);
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FD_ZERO(&E);
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if (curl_multi_fdset(cm, &R, &W, &E, &M)) {
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fprintf(stderr, "E: curl_multi_fdset\n");
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return EXIT_FAILURE;
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}
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if (curl_multi_timeout(cm, &L)) {
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fprintf(stderr, "E: curl_multi_timeout\n");
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return EXIT_FAILURE;
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}
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if (L == -1)
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L = 100;
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if (M == -1) {
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#ifdef WIN32
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Sleep(L);
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#else
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sleep(L / 1000);
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#endif
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} else {
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T.tv_sec = L/1000;
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T.tv_usec = (L%1000)*1000;
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if (0 > select(M+1, &R, &W, &E, &T)) {
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fprintf(stderr, "E: select(%i,,,,%li): %i: %s\n",
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M+1, L, errno, strerror(errno));
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return EXIT_FAILURE;
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}
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}
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}
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while ((msg = curl_multi_info_read(cm, &Q))) {
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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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}
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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 (C < CNT) {
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init(cm, C++);
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U++; /* just to prevent it from remaining at 0 if there are more
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URLs to get */
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}
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}
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}
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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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