xref: /aosp_15_r20/external/curl/docs/libcurl/opts/CURLOPT_NOPROXY.md (revision 6236dae45794135f37c4eb022389c904c8b0090d)

---
c: Copyright (C) Daniel Stenberg, <[email protected]>, et al.
SPDX-License-Identifier: curl
Title: CURLOPT_NOPROXY
Section: 3
Source: libcurl
Protocol:
  - All
See-also:
  - CURLOPT_PROXY (3)
  - CURLOPT_PROXYAUTH (3)
  - CURLOPT_PROXYTYPE (3)
Added-in: 7.19.4
---

# NAME

CURLOPT_NOPROXY - disable proxy use for specific hosts

# SYNOPSIS

~~~c
#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_NOPROXY, char *noproxy);
~~~

# DESCRIPTION

Pass a pointer to a null-terminated string. The string consists of a comma
separated list of hostnames that do not require a proxy to get reached, even
if one is specified. The only wildcard available is a single * character,
which matches all hosts, and effectively disables the proxy. Each name in this
list is matched as either a domain which contains the hostname, or the
hostname itself. For example, "ample.com" would match ample.com, ample.com:80,
and www.ample.com, but not www.example.com or ample.com.org.

Setting the *noproxy* string to "" (an empty string) explicitly enables the
proxy for all hostnames, even if there is an environment variable set for it.

Enter IPv6 numerical addresses in the list of hostnames without enclosing
brackets:

    "example.com,::1,localhost"

Since 7.86.0, IP addresses specified to this option can be provided using CIDR
notation: an appended slash and number specifies the number of "network bits"
out of the address to use in the comparison. For example "192.168.0.0/16"
would match all addresses starting with "192.168".

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.

# Environment variables

If there is an environment variable called **no_proxy** (or **NO_PROXY**),
it is used if the CURLOPT_NOPROXY(3) option is not set. It works exactly
the same way.

# DEFAULT

NULL

# %PROTOCOLS%

# EXAMPLE

~~~c
int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    /* accept various URLs */
    curl_easy_setopt(curl, CURLOPT_URL, "https://example.com/");
    /* use this proxy */
    curl_easy_setopt(curl, CURLOPT_PROXY, "http://proxy:80");
    /* ... but make sure this host name is not proxied */
    curl_easy_setopt(curl, CURLOPT_NOPROXY, "www.example.com");
    curl_easy_perform(curl);
  }
}
~~~

# %AVAILABILITY%

# RETURN VALUE

Returns CURLE_OK if the option is supported, CURLE_UNKNOWN_OPTION if not, or
CURLE_OUT_OF_MEMORY if there was insufficient heap space.