NAME¶
System::getEnv - Get the value of an environment variable.
SYNOPSIS¶
String getEnv( String env )
ARGUMENTS¶
env The name of the environment variable
DESCRIPTION¶
Retrieves the value of an environment variable.
This is often necessary in a web application as the web server will set
environment variables in the program. Some of these headers are set by the
server environment, others are set based on the current request (and so may be
trivially forged by the user's browser).
-
-
ua = getEnv("HTTP_USER_AGENT"); // Contents of User-Agent header
host = getEnv("HTTP_HOST"); // the IP address of the web server
user = getEnv("REMOTE_USER"); // the username under HTTP
authentication
ip = getEnv("REMOTE_ADDR"); // the client's IP address
Environment variables are also useful for command-line programs
-
-
home = getEnv("HOME"); // The user's home directory on Posix
systems
proxy = getEnv("HTTP_PROXY"); // The HTTP proxy to use for
outgoing connections
If the environment variable is not set, the empty String will be returned.
AUTHORS¶
Kaya standard library by Edwin Brady, Chris Morris and others
(kaya@kayalang.org). For further information see
http://kayalang.org/
LICENSE¶
The Kaya standard library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public License (version
2.1 or any later version) as published by the Free Software Foundation.
System.getArgs (3kaya)
System.getPID (3kaya)