1---
2c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
3SPDX-License-Identifier: curl
4Title: CURLOPT_IGNORE_CONTENT_LENGTH
5Section: 3
6Source: libcurl
7Protocol:
8  - HTTP
9  - FTP
10See-also:
11  - CURLOPT_HTTP_VERSION (3)
12  - CURLOPT_MAXFILESIZE_LARGE (3)
13---
14
15# NAME
16
17CURLOPT_IGNORE_CONTENT_LENGTH - ignore content length
18
19# SYNOPSIS
20
21~~~c
22#include <curl/curl.h>
23
24CURLcode curl_easy_setopt(CURL *handle, CURLOPT_IGNORE_CONTENT_LENGTH,
25                          long ignore);
26~~~
27
28# DESCRIPTION
29
30If *ignore* is set to 1L, ignore the Content-Length header in the HTTP
31response and ignore asking for or relying on it for FTP transfers.
32
33This is useful for doing HTTP transfers with ancient web servers which report
34incorrect content length for files over 2 gigabytes. If this option is used,
35curl cannot accurately report progress, and it instead stops the download when
36the server ends the connection.
37
38It is also useful with FTP when for example the file is growing while the
39transfer is in progress which otherwise unconditionally causes libcurl to
40report error.
41
42Only use this option if strictly necessary.
43
44# DEFAULT
45
460
47
48# EXAMPLE
49
50~~~c
51int main(void)
52{
53  CURL *curl = curl_easy_init();
54  if(curl) {
55    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
56
57    /* we know the server is silly, ignore content-length */
58    curl_easy_setopt(curl, CURLOPT_IGNORE_CONTENT_LENGTH, 1L);
59
60    curl_easy_perform(curl);
61  }
62}
63~~~
64
65# AVAILABILITY
66
67Added in 7.14.1. Support for FTP added in 7.46.0. This option is not working
68for HTTP when libcurl is built to use the hyper backend.
69
70# RETURN VALUE
71
72Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
73