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curlVersion

Information describing the Curl library


Description

This function queries the Curl library to provide information about its characteristics when it was compiled. This tells the user about its capabilities and can be used to determine strategies.

Usage

curlVersion(id = 0)

Arguments

id

an integer value between 0 and 3 inclusive. The idea is that one specifies the identifier for the version of interest. In fact, all values seem to yield the same result.

Value

A list

age

integer giving the number of this libcurl, 0 is FIRST, 1 is SECOND, 2 is THIRD

version

the version identifier as a string, e.g. "7.12.0"

version_num

the value as an integer

host

the machine on which the libcurl was configured/built.

features

a named integer vector of bits indicating what features of libcurl were configured and built into this version. These are features such as ipv6, ssl, libz, largefile, ntlm (Microsoft "authorization").

ssl_version

the string identifying the SSL version.

ssl_version_num

the number identifying the SSL version

libz_version

the string identifying the version of libz.

protocols

a character vector of the supported HTTP protocols, e.g. http, https, ftp, ldap, gopher, telnet

ares

name of the asynchronous DNS (domain name service) lookup library. This is often simply the empty string indicating it is not there.

ares_num

the number for the ares library

libidn

the name of the IDN (internationalized domain names) library being used. This field only appears in version 3 of libcurl. If you are using version 2 (e.g. curl-7.11.2), this will be NA. An empty string indicates that the field is present, but has no value.

See the man page for curl_version_info for a description of these fields. features in R is a named integer vector detailing the different features.

Author(s)

Duncan Temple Lang

References

Curl homepage http://curl.haxx.se

See Also

curl_version_info in the libcurl documentation.

Examples

curlVersion()

RCurl

General Network (HTTP/FTP/...) Client Interface for R

v1.98-1.3
BSD_3_clause + file LICENSE
Authors
CRAN Team [ctb, cre] (de facto maintainer since 2013), Duncan Temple Lang [aut] (<https://orcid.org/0000-0003-0159-1546>)
Initial release

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