romenskiy2012/curl

mirror of https://github.com/curl/curl.git synced 2026-04-25 19:12:13 +03:00

Daniel Stenberg 54ded66618

docs/libcurl: improve easy setopt examples

- always assign the curl_easy_perform() return code (and declare
  the necessary 'result' variable for it)

- always call curl_easy_cleanup() on the created easy handles

Closes #21364

2026-04-18 23:34:39 +02:00

2.2 KiB

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SPDX-License-Identifier

Title

Section

Source

See-also

Protocol

TLS-backend

Added-in

curl

CURLOPT_CAINFO

libcurl

CURLINFO_CAINFO (3)

CURLOPT_CAINFO_BLOB (3)

CURLOPT_CAPATH (3)

CURLOPT_CA_CACHE_TIMEOUT (3)

CURLOPT_SSL_VERIFYHOST (3)

CURLOPT_SSL_VERIFYPEER (3)

TLS

All

7.4.2

NAME

CURLOPT_CAINFO - path to Certificate Authority (CA) bundle

SYNOPSIS

#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_CAINFO, char *path);

DESCRIPTION

Pass a char pointer to a null-terminated string naming a file holding one or more certificates to verify the peer with.

If CURLOPT_SSL_VERIFYPEER(3) is zero and you avoid verifying the server's certificate, CURLOPT_CAINFO(3) need not even indicate an accessible file.

This option is by default set to the system path where libcurl's CA certificate bundle is assumed to be stored, as established at build time.

(Schannel) This option is supported for Schannel in Windows 7 or later but we recommend not using it until Windows 8 since it works better starting then. If the option is not set, then curl uses the certificates in the Windows' store of root certificates (the default for Schannel).

The application does not have to keep the string around after setting this option.

Using this option multiple times makes the last set string override the previous ones. Set it to NULL to disable its use again.

The default value for this can be figured out with CURLINFO_CAINFO(3).

DEFAULT

Built-in system specific. When curl is built with Schannel, this option is not set by default.

%PROTOCOLS%

EXAMPLE

int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode result;
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
    curl_easy_setopt(curl, CURLOPT_CAINFO, "/etc/certs/cabundle.pem");
    result = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}

HISTORY

Schannel support added in libcurl 7.60.

%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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