51 lines
3.6 KiB
HTML
51 lines
3.6 KiB
HTML
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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html
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PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html lang="en-us" xml:lang="en-us">
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<meta name="security" content="public" />
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<meta name="Robots" content="index,follow" />
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<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
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<meta name="DC.Type" content="topic" />
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<meta name="DC.Title" content="Environment variables" />
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<meta name="abstract" content="Before you begin writing your CGI program, you need to understand the format in which the server will pass the data. The server receives the URL-encoded information and, depending on the type of request, passes the information to the CGI program. The server does this by using environment variables, command line arguments, or standard input." />
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<meta name="description" content="Before you begin writing your CGI program, you need to understand the format in which the server will pass the data. The server receives the URL-encoded information and, depending on the type of request, passes the information to the CGI program. The server does this by using environment variables, command line arguments, or standard input." />
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<meta name="DC.Relation" scheme="URI" content="rzaieparcgi.htm" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 2002,2006" />
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<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2002,2006" />
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<meta name="DC.Format" content="XHTML" />
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<meta name="DC.Identifier" content="rzag3ch1envvar" />
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<meta name="DC.Language" content="en-us" />
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<!-- All rights reserved. Licensed Materials Property of IBM -->
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<!-- US Government Users Restricted Rights -->
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<!-- Use, duplication or disclosure restricted by -->
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<!-- GSA ADP Schedule Contract with IBM Corp. -->
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<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
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<link rel="stylesheet" type="text/css" href="./ic.css" />
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<title>Environment variables</title>
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</head>
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<body id="rzag3ch1envvar"><a name="rzag3ch1envvar"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Environment variables</h1>
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<div><p>Before you begin writing your CGI program, you need to understand
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the format in which the server will pass the data. The server receives the
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URL-encoded information and, depending on the type of request, passes the
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information to the CGI program. The server does this by using environment
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variables, command line arguments, or standard input.</p>
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<p>A CGI application program should be able to handle a NULL value when getting
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an environment variable. For example, when the CGI program is trying to do
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a getenv(″CONTENT_LENGTH″) and the method is GET, the value would be returned
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NULL. This is because CONTENT_LENGTH is only defined in method POST (to describe
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the length of standard input).</p>
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<p>The supported environment variables for HTTP Server can be found in the IBM<sup>®</sup> iSeries™ Information
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Center. The environment variables have been divided into two groups: Non-SSL
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and SSL. For more information, see <a href="rzaieenvvar.htm">Environment variables on HTTP Server</a></p>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rzaieparcgi.htm" title="This topic provides information about Common Gateway Interfaces (CGI).">Common Gateway Interface</a></div>
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</div>
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</div>
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</body>
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</html>
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