Here are sanitized values of some standard CGI environment variables:

Parent Pid = 271938
PATH_INFO =
SERVER_SOFTWARE = WN/2.5.0
SERVER_NAME =
SERVER_PROTOCOL = HTTP/1.1
SERVER_PORT = 80
AUTH_TYPE =
REMOTE_USER =
HTTP_ACCEPT = text/html,application/xhtmlxml,application/xmlq=0.9,*/*q=0.8
HTTP_ACCEPT_CHARSET =
HTTP_ACCEPT_LANGUAGE = en-US,enq=0.5
HTTP_RANGE =
HTTP_REFERER =
HTTP_USER_AGENT = CCBot/2.0 https://commoncrawl.org/faq/
HTTP_FROM =
HTTP_HOST = localhost:8080
HTTP_COOKIE =
PATH_TRANSLATED =
SCRIPT_NAME = /wndoc/examples/sample.cgi
SCRIPT_FILENAME = /usr/local/wn/wndoc/examples/sample.cgi
QUERY_STRING =
HTTP_X_FORWARDED_FOR = 44.210.85.190
HTTP_VIA =
REMOTE_HOST = localhost
REMOTE_ADDR = 127.0.0.1
REQUEST_METHOD = GET

Non-CGI variables provided by the WN server:

URL_SCHEME = http
DOCUMENT_ROOT = /usr/local/wn
WN_DIR_PATH = /usr/local/wn/wndoc/examples
WN_KEY =
REMOTE_PORT = 49082
HTTP_POST_FILE =
HTTP_PUT_FILE =