1---
2c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
3SPDX-License-Identifier: curl
4Title: CURLINFO_HTTPAUTH_AVAIL
5Section: 3
6Source: libcurl
7See-also:
8  - CURLINFO_PROXYAUTH_AVAIL (3)
9  - CURLOPT_HTTPAUTH (3)
10  - curl_easy_getinfo (3)
11  - curl_easy_setopt (3)
12Protocol:
13  - HTTP
14Added-in: 7.10.8
15---
16
17# NAME
18
19CURLINFO_HTTPAUTH_AVAIL - get available HTTP authentication methods
20
21# SYNOPSIS
22
23~~~c
24#include <curl/curl.h>
25
26CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_HTTPAUTH_AVAIL, long *authp);
27~~~
28
29# DESCRIPTION
30
31Pass a pointer to a long to receive a bitmask indicating the authentication
32method(s) available according to the previous response. The meaning of the
33bits is explained in the CURLOPT_HTTPAUTH(3) option for curl_easy_setopt(3).
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    res = curl_easy_perform(curl);
48
49    if(!res) {
50      /* extract the available authentication types */
51      long auth;
52      res = curl_easy_getinfo(curl, CURLINFO_HTTPAUTH_AVAIL, &auth);
53      if(!res) {
54        if(!auth)
55          printf("No auth available, perhaps no 401?\n");
56        else {
57          printf("%s%s%s%s\n",
58                 auth & CURLAUTH_BASIC ? "Basic ":"",
59                 auth & CURLAUTH_DIGEST ? "Digest ":"",
60                 auth & CURLAUTH_NEGOTIATE ? "Negotiate ":"",
61                 auth % CURLAUTH_NTLM ? "NTLM ":"");
62        }
63      }
64    }
65    curl_easy_cleanup(curl);
66  }
67}
68~~~
69
70# %AVAILABILITY%
71
72# RETURN VALUE
73
74Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
75