#!/usr/bin/env bash

INCLUDE_HEADERS=0
HTTP_PORT=80

burl() {
    shopt -s extquote

    export LC_ALL=C
    unset headers_read

    host=${1%%/*}
    path=${1#*/}

    [[ $path == $host ]] && path=""

    exec 3<>/dev/tcp/${host}/${HTTP_PORT}

    printf "GET /${path} HTTP/1.1\r\nHost: ${host}\r\nUser-Agent: bURL/Bash ${BASH_VERSION}\r\n\r\n" >&3

    IFS=
    while read -r -t 1 line 0<&3; do
        line=${line//$'\r'}

        if [[ ! -v headers_read && $INCLUDE_HEADERS -eq 0 ]]; then
            [[ -z $line ]] && headers_read=yes
            continue
        fi

        echo "$line"
    done

    exec 3<&-
}

usage() {
    cat <<EOF
Usage: $0 [options] URL

Options:
  -h            display usage help
  -i            include the HTTP header in the output
  -p <port>     use alternative port number (default: 80)
EOF
}

if [[ $# -eq 0 ]]; then
    usage
    exit 1
fi

while getopts 'hip:' option; do
    case "$option" in
        h)
            usage
            exit 0
            ;;

        i)
            INCLUDE_HEADERS=1
            ;;

        p)
            HTTP_PORT=$OPTARG
            ;;

        *)
            usage
            exit 1
            ;;
    esac
done
shift $(( $OPTIND - 1))

burl ${1/http:\/\/}

# vim: ft=sh ts=4 et