#!/bin/sh
# gopher-get.sh version 1 by Ben Collver

NETCAT="ncat -vv"
#NETCAT="nc -vv"

OUT=""
URL="$1"

if [ -z "$URL" ]
then
    cat <<__EOF__
Usage: gopher-get.sh [options] URL

Options:

    -o filename

Exit code 0 on success.

__EOF__
    exit
fi

if [ "$URL" = "-o" ]
then
    shift
    OUT="$1"
    shift
    URL="$1"
fi

if [ -z "$OUT" ]
then
    OUT=$(basename $URL)
fi

CONN=$(echo "$URL" | awk -F / '{print $3}')
HOST=$(echo "$CONN" | awk -F : '{print $1}')
PORT=$(echo "$CONN" | awk -F : '{print $2}')
SEL=$(echo "$URL" | awk '{
    # remove protocol and host
    sub(/^gopher:\/\/[^:/]*/, "")

    # remove port
    sub(/^:[0-9]*/, "")

    # remove item type
    sub(/^\/?[0-9a-zA-Z]/, "")

    print
}')

if [ -z "$PORT" ]
then
    PORT=70
fi

if [ "$OUT" = "-" ]
then
    printf "$SEL\r\n" | $NETCAT $HOST $PORT
else
    if [ -e "$OUT" ]
    then
        echo "File already exists: $OUT"
        exit 1
    fi
    printf "$SEL\r\n" | $NETCAT $HOST $PORT >$OUT
fi