142 lines
3.8 KiB
C
142 lines
3.8 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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* This is an example application source code using the multi interface.
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*/
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#include <stdio.h>
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#include <string.h>
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/* somewhat unix-specific */
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#include <sys/time.h>
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#include <unistd.h>
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/* curl stuff */
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#include <curl/curl.h>
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/*
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* Download a HTTP file and upload an FTP file simultaneously.
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*/
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#define HANDLECOUNT 2 /* Number of simultaneous transfers */
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#define HTTP_HANDLE 0 /* Index for the HTTP transfer */
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#define FTP_HANDLE 1 /* Index for the FTP transfer */
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int main(void)
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{
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CURL *handles[HANDLECOUNT];
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CURLM *multi_handle;
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int still_running; /* keep number of running handles */
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int i;
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CURLMsg *msg; /* for picking up messages with the transfer status */
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int msgs_left; /* how many messages are left */
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/* Allocate one CURL handle per transfer */
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for (i=0; i<HANDLECOUNT; i++)
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handles[i] = curl_easy_init();
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/* set the options (I left out a few, you'll get the point anyway) */
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curl_easy_setopt(handles[HTTP_HANDLE], CURLOPT_URL, "http://example.com");
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curl_easy_setopt(handles[FTP_HANDLE], CURLOPT_URL, "ftp://example.com");
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curl_easy_setopt(handles[FTP_HANDLE], CURLOPT_UPLOAD, 1L);
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/* init a multi stack */
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multi_handle = curl_multi_init();
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/* add the individual transfers */
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for (i=0; i<HANDLECOUNT; i++)
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curl_multi_add_handle(multi_handle, handles[i]);
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/* we start some action by calling perform right away */
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curl_multi_perform(multi_handle, &still_running);
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while(still_running) {
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struct timeval timeout;
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int rc; /* select() return code */
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fd_set fdread;
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fd_set fdwrite;
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fd_set fdexcep;
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int maxfd = -1;
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long curl_timeo = -1;
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FD_ZERO(&fdread);
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FD_ZERO(&fdwrite);
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FD_ZERO(&fdexcep);
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/* set a suitable timeout to play around with */
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timeout.tv_sec = 1;
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timeout.tv_usec = 0;
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curl_multi_timeout(multi_handle, &curl_timeo);
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if(curl_timeo >= 0) {
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timeout.tv_sec = curl_timeo / 1000;
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if(timeout.tv_sec > 1)
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timeout.tv_sec = 1;
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else
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timeout.tv_usec = (curl_timeo % 1000) * 1000;
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}
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/* get file descriptors from the transfers */
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curl_multi_fdset(multi_handle, &fdread, &fdwrite, &fdexcep, &maxfd);
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/* In a real-world program you OF COURSE check the return code of the
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function calls. On success, the value of maxfd is guaranteed to be
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greater or equal than -1. We call select(maxfd + 1, ...), specially in
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case of (maxfd == -1), we call select(0, ...), which is basically equal
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to sleep. */
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rc = select(maxfd+1, &fdread, &fdwrite, &fdexcep, &timeout);
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switch(rc) {
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case -1:
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/* select error */
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break;
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case 0: /* timeout */
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default: /* action */
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curl_multi_perform(multi_handle, &still_running);
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break;
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}
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}
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/* See how the transfers went */
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while ((msg = curl_multi_info_read(multi_handle, &msgs_left))) {
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if (msg->msg == CURLMSG_DONE) {
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int idx, found = 0;
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/* Find out which handle this message is about */
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for (idx=0; idx<HANDLECOUNT; idx++) {
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found = (msg->easy_handle == handles[idx]);
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if(found)
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break;
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}
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switch (idx) {
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case HTTP_HANDLE:
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printf("HTTP transfer completed with status %d\n", msg->data.result);
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break;
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case FTP_HANDLE:
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printf("FTP transfer completed with status %d\n", msg->data.result);
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break;
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}
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}
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}
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curl_multi_cleanup(multi_handle);
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/* Free the CURL handles */
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for (i=0; i<HANDLECOUNT; i++)
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curl_easy_cleanup(handles[i]);
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return 0;
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}
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