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SCRIPT_NAME
A virtual path to the program being run. Use this for self-referring URLs.
SERVER_NAME
Contains the server host name or IP address of the server. For example:
www.ibm.com
SERVER_PORT
Contains the port number to which the client request was sent. For
example:
80
SERVER_PROTOCOL
Contains the name and version of the information protocol that is used to
make the request. For example:
HTTP/1.0
SERVER_SOFTWARE
Contains the name and version of the information server software that is
answering the request. For example:
IBM-Secure-ICS/AS/400 Secure HTTP Server
Requests from Standard Search (ISINDEX) Documents
ISINDEX is an HTML tag that identifies the document as a standard search
document and causes the browser to automatically generate an entry field. When
information is sent from an ISINDEX document, the server takes the appended
data (the information following the ?), breaks it at the pluses (+), and sends the
data to the CGI program as command line arguments (argv). For example:
<ISINDEX>
Note: It is possible to write CGI scripts that display all environment variables. At
times these variables may include sensitive data such as user IDs and
passwords for various products. Consequently, you must be careful about
displaying environment variables in your CGI scripts, and you must be
careful about who has access to them.
Passing SSL Environment Variables to a CGI Program
You can use the following SSL-related environment variables in CGI programs.
HTTPS
Returns ON if the system has completed an SSL handshake. It returns OFF
if the exchange of signals to set up communications between two modems
has failed. For example:
OFF
HTTPS_CLIENT_CERT
The entire certificate passed to the server from the client browser when
SSL Client authentication is enabled. The format of the certificate is a
BASE64 encoded string that represents the DER format of the X.509
certificate.
HTTPS_CLIENT_CERT_COUNTRY
The Country Code from the client certificate’s distinguished name. For
example:
US
Chapter 1. Writing Common Gateway Interface Programs 15