curl/docs/libcurl/opts/CURLINFO_PROXYAUTH_USED.md
Daniel Stenberg e694c8284a
docs/libcurl/opts: clarify the return values
Expand a little.

- mention the type name of the return code
- avoid stating which exact return codes that might be returned, as that
  varies over time, builds and conditions
- avoid stating some always return OK
- refer to the manpage documenting all the return codes

Closes #15900
2025-01-02 17:13:33 +01:00

83 lines
1.9 KiB
Markdown

---
c: Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
SPDX-License-Identifier: curl
Title: CURLINFO_PROXYAUTH_USED
Section: 3
Source: libcurl
See-also:
- CURLINFO_HTTPAUTH_USED (3)
- CURLINFO_PROXYAUTH_AVAIL (3)
- CURLOPT_HTTPAUTH (3)
Protocol:
- HTTP
Added-in: 8.12.0
---
# NAME
CURLINFO_PROXYAUTH_USED - get used HTTP proxy authentication method
# SYNOPSIS
~~~c
#include <curl/curl.h>
CURLcode curl_easy_getinfo(CURL *handle, CURLINFO_PROXYAUTH_USED, long *authp);
~~~
# DESCRIPTION
Pass a pointer to a long to receive a bitmask indicating the authentication
method that was used in the previous request done over an HTTP proxy. The
meaning of the possible bits is explained in the CURLOPT_HTTPAUTH(3) option
for curl_easy_setopt(3).
The returned value has zero or one bit set.
# %PROTOCOLS%
# EXAMPLE
~~~c
int main(void)
{
CURL *curl = curl_easy_init();
if(curl) {
CURLcode res;
curl_easy_setopt(curl, CURLOPT_URL, "https://example.com");
curl_easy_setopt(curl, CURLOPT_PROXY, "http://proxy.example.com");
curl_easy_setopt(curl, CURLOPT_PROXYAUTH,
CURLAUTH_BASIC | CURLAUTH_DIGEST);
curl_easy_setopt(curl, CURLOPT_PROXYUSERNAME, "shrek");
curl_easy_setopt(curl, CURLOPT_PROXYPASSWORD, "swamp");
res = curl_easy_perform(curl);
if(!res) {
long auth;
res = curl_easy_getinfo(curl, CURLINFO_PROXYAUTH_USED, &auth);
if(!res) {
if(!auth)
printf("No auth used\n");
else {
if(auth == CURLAUTH_DIGEST)
printf("Used Digest proxy authentication\n");
else
printf("Used Basic proxy authentication\n");
}
}
}
curl_easy_cleanup(curl);
}
}
~~~
# %AVAILABILITY%
# RETURN VALUE
curl_easy_getinfo(3) returns a CURLcode indicating success or error.
CURLE_OK (0) means everything was OK, non-zero means an error occurred, see
libcurl-errors(3).