95 lines
2.4 KiB
C
95 lines
2.4 KiB
C
/*****************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* $Id: multi-single.c,v 1.6 2006-10-13 14:01:20 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 a HTTP file.
|
|
*/
|
|
int main(int argc, char **argv)
|
|
{
|
|
CURL *http_handle;
|
|
CURLM *multi_handle;
|
|
|
|
int still_running; /* keep number of running handles */
|
|
|
|
http_handle = curl_easy_init();
|
|
|
|
/* set the options (I left out a few, you'll get the point anyway) */
|
|
curl_easy_setopt(http_handle, CURLOPT_URL, "http://www.haxx.se/");
|
|
|
|
/* init a multi stack */
|
|
multi_handle = curl_multi_init();
|
|
|
|
/* add the individual transfers */
|
|
curl_multi_add_handle(multi_handle, http_handle);
|
|
|
|
/* 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 */
|
|
still_running = 0;
|
|
printf("select() returns error, this is badness\n");
|
|
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);
|
|
|
|
return 0;
|
|
}
|