multi-double.c
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上传日期:2018-10-23
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- /*****************************************************************************
- * _ _ ____ _
- * Project ___| | | | _ | |
- * / __| | | | |_) | |
- * | (__| |_| | _ <| |___
- * ___|___/|_| ______|
- *
- * $Id: multi-double.c,v 1.4 2006-10-13 14:01:19 bagder Exp $
- *
- * This is a very simple example using the multi interface.
- */
- #include <stdio.h>
- #include <string.h>
- /* somewhat unix-specific */
- #include <sys/time.h>
- #include <unistd.h>
- /* curl stuff */
- #include <curl/curl.h>
- /*
- * Simply download two HTTP files!
- */
- int main(int argc, char **argv)
- {
- CURL *http_handle;
- CURL *http_handle2;
- CURLM *multi_handle;
- int still_running; /* keep number of running handles */
- http_handle = curl_easy_init();
- http_handle2 = curl_easy_init();
- /* set options */
- curl_easy_setopt(http_handle, CURLOPT_URL, "http://www.haxx.se/");
- /* set options */
- curl_easy_setopt(http_handle2, CURLOPT_URL, "http://localhost/");
- /* init a multi stack */
- multi_handle = curl_multi_init();
- /* add the individual transfers */
- curl_multi_add_handle(multi_handle, http_handle);
- curl_multi_add_handle(multi_handle, http_handle2);
- /* we start some action by calling perform right away */
- while(CURLM_CALL_MULTI_PERFORM ==
- curl_multi_perform(multi_handle, &still_running));
- while(still_running) {
- struct timeval timeout;
- int rc; /* select() return code */
- fd_set fdread;
- fd_set fdwrite;
- fd_set fdexcep;
- int maxfd;
- FD_ZERO(&fdread);
- FD_ZERO(&fdwrite);
- FD_ZERO(&fdexcep);
- /* set a suitable timeout to play around with */
- timeout.tv_sec = 1;
- timeout.tv_usec = 0;
- /* get file descriptors from the transfers */
- curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd);
- /* In a real-world program you OF COURSE check the return code of the
- function calls, *and* you make sure that maxfd is bigger than -1 so
- that the call to select() below makes sense! */
- rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
- switch(rc) {
- case -1:
- /* select error */
- break;
- case 0:
- default:
- /* timeout or readable/writable sockets */
- while(CURLM_CALL_MULTI_PERFORM ==
- curl_multi_perform(multi_handle, &still_running));
- break;
- }
- }
- curl_multi_cleanup(multi_handle);
- curl_easy_cleanup(http_handle);
- curl_easy_cleanup(http_handle2);
- return 0;
- }