3.4 Environment Variables

Web server variables are the CGI environment variables that are set when the server executes the gateway program. In order to pass data about the information request from the server to the script, the server uses command-line arguments and environment variables. These environment variables can be used to output information to a log file or can be used within Idoc Script statements and as part of evaluations.

For example, this Idoc Script statement evaluates whether the remote host address matches a specific string:

<$if strEquals("207.0.0.1",REMOTE_HOST)$>

This HTML and Idoc Script markup displays a list of web server environment information on the page:

<P>HTTP_INTERNETUSER=<$HTTP_INTERNETUSER$></P>
<P>REMOTE_HOST=<$REMOTE_HOST$></P>
<P>SCRIPT_NAME=<$SCRIPT_NAME$></P>

The following is a list of Web server variables:

"CONTENT_LENGTH"
"GATEWAY_INTERFACE"
"HTTP_ACCEPT"
"HTTP_ACCEPT_ENCODING"
"HTTP_ACCEPT_LANGUAGE"
"HTTP_COOKIE"
"HTTP_HOST"
"HTTP_INTERNETUSER"
"HTTP_REFERER"
"HTTP_USER_AGENT"
"PATH_INFO"
"PATH_INFO"
"QUERY_STRING"
"REMOTE_ADDR"
"REMOTE_HOST"
"REQUEST_METHOD"
"SCRIPT_NAME"
"SERVER_NAME"
"SERVER_PORT"
"SERVER_PROTOCOL"
"SERVER_SOFTWARE"