1---
2c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
3SPDX-License-Identifier: curl
4Title: CURLINFO_CONTENT_LENGTH_DOWNLOAD_T
5Section: 3
6Source: libcurl
7See-also:
8  - CURLINFO_CONTENT_LENGTH_UPLOAD_T (3)
9  - curl_easy_getinfo (3)
10  - curl_easy_setopt (3)
11Protocol:
12  - HTTP
13Added-in: 7.55.0
14---
15
16# NAME
17
18CURLINFO_CONTENT_LENGTH_DOWNLOAD_T - get content-length of download
19
20# SYNOPSIS
21
22~~~c
23#include <curl/curl.h>
24
25CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_CONTENT_LENGTH_DOWNLOAD_T,
26                           curl_off_t *content_length);
27~~~
28
29# DESCRIPTION
30
31Pass a pointer to a *curl_off_t* to receive the content-length of the
32download. This is the value read from the Content-Length: field. Stores -1 if
33the size is not known.
34
35# %PROTOCOLS%
36
37# EXAMPLE
38
39~~~c
40int main(void)
41{
42  CURL *curl = curl_easy_init();
43  if(curl) {
44    CURLcode res;
45    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
46
47    /* Perform the request */
48    res = curl_easy_perform(curl);
49
50    if(!res) {
51      /* check the size */
52      curl_off_t cl;
53      res = curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD_T, &cl);
54      if(!res) {
55        printf("Download size: %" CURL_FORMAT_CURL_OFF_T "\n", cl);
56      }
57    }
58  }
59}
60~~~
61
62# %AVAILABILITY%
63
64# RETURN VALUE
65
66Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
67