#!/bin/sh
# Finger protocol adapter for Chawan.

die() {
	echo "Cha-Control: ConnectionError $1 $2"
	exit 1
}

PORT=${MAPPED_URI_PORT:-79}
test "$PORT" = 79 || die InvalidURL "wrong port, only port 79 is supported"

# Parse the URL. Roughly based on Lynx finger URL parsing, but less
# sophisticated.
USER=$MAPPED_URI_USERNAME
if test -z "$USER"
then	case "$MAPPED_URI_PATH" in
	/w/*)	USER="/w ${MAPPED_URI_PATH#/w/}" ;;
	*)	USER=${MAPPED_URI_PATH#/} ;;
	esac
fi

# Headers.
printf 'Content-Type: text/plain\n'

# Newline; from here on we are sending the content body.
printf '\n'

# Finger request, the output of which goes to stdout.
printf '%s\r\n' "$USER" | "$CHA_LIBEXEC_DIR"/nc "$MAPPED_URI_HOST" "$PORT"