1/***************************************************************************
2 *                                  _   _ ____  _
3 *  Project                     ___| | | |  _ \| |
4 *                             / __| | | | |_) | |
5 *                            | (__| |_| |  _ <| |___
6 *                             \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at http://curl.haxx.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22#include <stdio.h>
23#include <curl/curl.h>
24
25#define STOP_DOWNLOAD_AFTER_THIS_MANY_BYTES         6000
26#define MINIMAL_PROGRESS_FUNCTIONALITY_INTERVAL     3
27
28struct myprogress {
29  double lastruntime;
30  CURL *curl;
31};
32
33static int progress(void *p,
34                    double dltotal, double dlnow,
35                    double ultotal, double ulnow)
36{
37  struct myprogress *myp = (struct myprogress *)p;
38  CURL *curl = myp->curl;
39  double curtime = 0;
40
41  curl_easy_getinfo(curl, CURLINFO_TOTAL_TIME, &curtime);
42
43  /* under certain circumstances it may be desirable for certain functionality
44     to only run every N seconds, in order to do this the transaction time can
45     be used */
46  if((curtime - myp->lastruntime) >= MINIMAL_PROGRESS_FUNCTIONALITY_INTERVAL) {
47    myp->lastruntime = curtime;
48    fprintf(stderr, "TOTAL TIME: %f \r\n", curtime);
49  }
50
51  fprintf(stderr, "UP: %g of %g  DOWN: %g of %g\r\n",
52          ulnow, ultotal, dlnow, dltotal);
53
54  if(dlnow > STOP_DOWNLOAD_AFTER_THIS_MANY_BYTES)
55    return 1;
56  return 0;
57}
58
59int main(void)
60{
61  CURL *curl;
62  CURLcode res = CURLE_OK;
63  struct myprogress prog;
64
65  curl = curl_easy_init();
66  if(curl) {
67    prog.lastruntime = 0;
68    prog.curl = curl;
69
70    curl_easy_setopt(curl, CURLOPT_URL, "http://example.com/");
71    curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, progress);
72    /* pass the struct pointer into the progress function */
73    curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, &prog);
74    curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0L);
75    res = curl_easy_perform(curl);
76
77    if(res != CURLE_OK)
78      fprintf(stderr, "%s\n", curl_easy_strerror(res));
79
80    /* always cleanup */
81    curl_easy_cleanup(curl);
82  }
83  return (int)res;
84}
85