nslookup

has_internet

The <code>nslookup</code> function is similar to <code>nsl</code> but works on all platforms
and can resolve ipv6 addresses if supported by the OS. Default behavior raises an
error if lookup fails.

The curl() and curl_download() functions provide highly
configurable drop-in replacements for base url() and download.file() with
better performance, support for encryption (https, ftps), gzip compression,
authentication, and other 'libcurl' goodies. The core of the package implements a
framework for performing fully customized requests where data can be processed
either in memory, on disk, or streaming via the callback or connection
interfaces. Some knowledge of 'libcurl' is recommended; for a more-user-friendly
web client see the 'httr' package which builds on this package with http
specific tools and logic.

Jeroen Ooms

curl

A Modern and Flexible Web Client for R

Hadley Wickham

RStudio 

nslookup function

<dl><dt>host</dt>
<dd>a string with a hostname</dd>
<dt>ipv4_only</dt>
<dd>always return ipv4 address. Set to <code>FALSE</code> to allow for ipv6 as well.</dd>
<dt>multiple</dt>
<dd>returns multiple ip addresses if possible</dd>
<dt>error</dt>
<dd>raise an error for failed DNS lookup. Otherwise returns <code>NULL</code>.</dd></dl>

Arguments

Lookup a hostname — nslookup

<dl>

<dt>host</dt>
<dd>a string with a hostname</dd>


<dt>ipv4_only</dt>
<dd>always return ipv4 address. Set to <code>FALSE</code> to allow for ipv6 as well.</dd>


<dt>multiple</dt>
<dd>returns multiple ip addresses if possible</dd>


<dt>error</dt>
<dd>raise an error for failed DNS lookup. Otherwise returns <code>NULL</code>.</dd>

</dl>

nslookup: Lookup a hostname

Description

Usage

Arguments

Details

Examples