1 /*****************************************************************************
3 * Project ___| | | | _ \| |
5 * | (__| |_| | _ <| |___
6 * \___|\___/|_| \_\_____|
10 * Example application source code using the multi interface to download many
11 * files, but with a capped maximum amount of simultaneous transfers.
13 * Written by Michael Wallner
17 #include <curl/multi.h>
19 static const char *urls[] = {
20 "http://www.microsoft.com",
21 "http://www.opensource.org",
22 "http://www.google.com",
23 "http://www.yahoo.com",
25 "http://www.mysql.com",
26 "http://www.oracle.com",
27 "http://www.ripe.net",
28 "http://www.iana.org",
29 "http://www.amazon.com",
30 "http://www.netcraft.com",
31 "http://www.heise.de",
34 "http://www.cnet.com",
35 "http://www.news.com",
37 "http://www.wikipedia.org",
38 "http://www.dell.com",
40 "http://www.cert.org",
42 "http://www.nist.gov",
43 "http://www.ebay.com",
44 "http://www.playstation.com",
45 "http://www.uefa.com",
46 "http://www.ieee.org",
47 "http://www.apple.com",
48 "http://www.sony.com",
49 "http://www.symantec.com",
50 "http://www.zdnet.com",
51 "http://www.fujitsu.com",
52 "http://www.supermicro.com",
53 "http://www.hotmail.com",
54 "http://www.ecma.com",
55 "http://www.bbc.co.uk",
56 "http://news.google.com",
57 "http://www.foxnews.com",
59 "http://www.wired.com",
61 "http://www.usatoday.com",
64 "http://slashdot.org",
65 "http://www.bloglines.com",
66 "http://www.techweb.com",
67 "http://www.newslink.org",
71 #define MAX 10 /* number of simultaneous transfers */
72 #define CNT sizeof(urls)/sizeof(char*) /* total number of transfers to do */
74 static int cb(char *d, size_t n, size_t l, void *p)
76 /* take care of the data here, ignored in this example */
82 static void init(CURLM *cm, int i)
84 CURL *eh = curl_easy_init();
86 curl_easy_setopt(eh, CURLOPT_WRITEFUNCTION, cb);
87 curl_easy_setopt(eh, CURLOPT_HEADER, 0);
88 curl_easy_setopt(eh, CURLOPT_URL, urls[i]);
89 curl_easy_setopt(eh, CURLOPT_PRIVATE, urls[i]);
90 curl_easy_setopt(eh, CURLOPT_VERBOSE, 0);
92 curl_multi_add_handle(cm, eh);
105 curl_global_init(CURL_GLOBAL_ALL);
107 cm = curl_multi_init();
109 for (C = 0; C < MAX; ++C) {
114 while (CURLM_CALL_MULTI_PERFORM == curl_multi_perform(cm, &U));
121 if (curl_multi_fdset(cm, &R, &W, &E, &M)) {
122 fprintf(stderr, "E: curl_multi_fdset\n");
126 /* In a real-world program you OF COURSE check the return that maxfd is
127 bigger than -1 so that the call to select() below makes sense! */
129 if (curl_multi_timeout(cm, &L)) {
130 fprintf(stderr, "E: curl_multi_timeout\n");
135 T.tv_usec = (L%1000)*1000;
137 if (0 > select(M+1, &R, &W, &E, &T)) {
138 fprintf(stderr, "E: select\n");
143 while ((msg = curl_multi_info_read(cm, &Q))) {
144 if (msg->msg == CURLMSG_DONE) {
146 CURL *e = msg->easy_handle;
147 curl_easy_getinfo(msg->easy_handle, CURLINFO_PRIVATE, &url);
148 fprintf(stderr, "R: %d - %s <%s>\n",
149 msg->data.result, curl_easy_strerror(msg->data.result), url);
150 curl_multi_remove_handle(cm, e);
151 curl_easy_cleanup(e);
154 fprintf(stderr, "E: CURLMsg (%d)\n", msg->msg);
162 curl_multi_cleanup(cm);
163 curl_global_cleanup();