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System.getEnv(3kaya) Kaya module reference System.getEnv(3kaya)
System::getEnv - Get the value of an environment variable.
String getEnv( String env )
env The name of the environment variable
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.
Kaya standard library by Edwin Brady, Chris Morris and others (firstname.lastname@example.org). For further information see http://kayalang.org/
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.
Kaya October 2012 System.getEnv(3kaya)