1/***************************************************************************
2 *                                  _   _ ____  _
3 *  Project                     ___| | | |  _ \| |
4 *                             / __| | | | |_) | |
5 *                            | (__| |_| |  _ <| |___
6 *                             \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 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 https://curl.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 * SPDX-License-Identifier: curl
22 *
23 ***************************************************************************/
24/* <DESC>
25 * Use the progress callbacks, old and/or new one depending on available
26 * libcurl version.
27 * </DESC>
28 */
29#include <stdio.h>
30#include <curl/curl.h>
31
32#define MINIMAL_PROGRESS_FUNCTIONALITY_INTERVAL     3000000
33#define STOP_DOWNLOAD_AFTER_THIS_MANY_BYTES         6000
34
35struct myprogress {
36  curl_off_t lastruntime; /* type depends on version, see above */
37  CURL *curl;
38};
39
40/* this is how the CURLOPT_XFERINFOFUNCTION callback works */
41static int xferinfo(void *p,
42                    curl_off_t dltotal, curl_off_t dlnow,
43                    curl_off_t ultotal, curl_off_t ulnow)
44{
45  struct myprogress *myp = (struct myprogress *)p;
46  CURL *curl = myp->curl;
47  curl_off_t curtime = 0;
48
49  curl_easy_getinfo(curl, CURLINFO_TOTAL_TIME_T, &curtime);
50
51  /* under certain circumstances it may be desirable for certain functionality
52     to only run every N seconds, in order to do this the transaction time can
53     be used */
54  if((curtime - myp->lastruntime) >= MINIMAL_PROGRESS_FUNCTIONALITY_INTERVAL) {
55    myp->lastruntime = curtime;
56    fprintf(stderr, "TOTAL TIME: %lu.%06lu\r\n",
57            (unsigned long)(curtime / 1000000),
58            (unsigned long)(curtime % 1000000));
59  }
60
61  fprintf(stderr, "UP: %lu of %lu  DOWN: %lu of %lu\r\n",
62          (unsigned long)ulnow, (unsigned long)ultotal,
63          (unsigned long)dlnow, (unsigned long)dltotal);
64
65  if(dlnow > STOP_DOWNLOAD_AFTER_THIS_MANY_BYTES)
66    return 1;
67  return 0;
68}
69
70int main(void)
71{
72  CURL *curl;
73  CURLcode res = CURLE_OK;
74  struct myprogress prog;
75
76  curl = curl_easy_init();
77  if(curl) {
78    prog.lastruntime = 0;
79    prog.curl = curl;
80
81    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
82
83    curl_easy_setopt(curl, CURLOPT_XFERINFOFUNCTION, xferinfo);
84    /* pass the struct pointer into the xferinfo function */
85    curl_easy_setopt(curl, CURLOPT_XFERINFODATA, &prog);
86
87    curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0L);
88    res = curl_easy_perform(curl);
89
90    if(res != CURLE_OK)
91      fprintf(stderr, "%s\n", curl_easy_strerror(res));
92
93    /* always cleanup */
94    curl_easy_cleanup(curl);
95  }
96  return (int)res;
97}
98