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

1.8 KiB

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SPDX-License-Identifier

Title

Section

Source

See-also

Protocol

Added-in

curl

CURLOPT_PROXYAUTH

libcurl

CURLOPT_HTTPAUTH (3)

CURLOPT_PROXY (3)

CURLOPT_PROXYPORT (3)

CURLOPT_PROXYTYPE (3)

CURLOPT_PROXYUSERPWD (3)

All

7.10.7

NAME

CURLOPT_PROXYAUTH - HTTP proxy authentication methods

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_PROXYAUTH, long bitmask);

DESCRIPTION

Pass a long as parameter, which is set to a bitmask, to tell libcurl which HTTP authentication method(s) you want it to use for your proxy authentication. If more than one bit is set, libcurl first queries the site to see what authentication methods it supports and then it picks the best one you allow it to use. For some methods, this induces an extra network round-trip. Set the actual name and password with the CURLOPT_PROXYUSERPWD(3) option.

The bitmask can be constructed by the bits listed and described in the CURLOPT_HTTPAUTH(3) man page.

DEFAULT

CURLAUTH_BASIC

%PROTOCOLS%

EXAMPLE

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode ret;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
    /* use this proxy */
    curl_easy_setopt(curl, CURLOPT_PROXY, "http://local.example.com:1080");
    /* allow whatever auth the proxy speaks */
    curl_easy_setopt(curl, CURLOPT_PROXYAUTH, CURLAUTH_ANY);
    /* set the proxy credentials */
    curl_easy_setopt(curl, CURLOPT_PROXYUSERPWD, "james:007");
    ret = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}

%AVAILABILITY%

RETURN VALUE

curl_easy_setopt(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).

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