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#!/bin/sh
##
## Get a gopherlink in the format:
##
## gopher://domain.org:port/*/my/cool/selector
##
## or a selector in gph format:
##
## [TYPE|SEL|HOST|PORT]
##
## and print on output the corresponding "unique" selectorid:
##
## TYPE|SEL|HOST|PORT|SHA256
##
## which is understood by `burrow`
##
## -----------------------
##
## (C) 2018 Vincenzo 'KatolaZ' Nicosia <katolaz@freaknet.org>
##
## Use, modify, redistribute under the terms of the GNU General
## Public License version 3 or, at your option, any other version.
##
##
###
### get a selector in gph format and transform it in a selectorid
###
## function
gph_to_id(){
gph="$( echo $1| sed 's/\[//g;s/\]//g')"
OLDIFS=$IFS
#IFS=$'\t\n'
IFS="|"
sid=$(echo "${gph}" | sha256sum | cut -d " " -f 1)
echo "${gph}|${sid}"
IFS="$OLDIFS"
}
###
### Get a gopherurl and transform it in a selectorid
###
## function
gopherurl_to_id(){
URL="$(echo $1 | sed 's,gopher://,,g')"
hostport=$(echo "$URL" | cut -d "/" -f 1)
host="$(echo $hostport | cut -d ":" -f 1)"
port="$(echo $hostport | cut -s -d ":" -f 2)"
[ -z "$port" ] && port='70'
type=$(echo "$URL" | cut -s -d "/" -f 2)
[ -z "$type" ] && {
type='1'
sel="/"
gph_to_id "[${type}|${sel}|${host}|$port]"
exit 0
}
[ -n "${type#?}" ] && echo "Invalid Gopher URL" >&2 && exit 1
## Check if type is a valid one
type="$(echo $type | sed -n '/^[0-9ITghis+]$/p')"
[ -z "${type}" ] && echo "Invalid Gopher URL" >&2 && exit 1
sel=/$(echo "$URL" | cut -s -d "/" -f 3-)
gph_to_id "[${type}|${sel}|${host}|$port]"
}
[ $# -lt 1 ] && echo "Usage: $0 <gopherurl>" && echo " $0 <gphselector>" && exit 1
[ -n "$(echo $1 | sed -n '/^gopher:\/\//p')" ] && {
gopherurl_to_id "$1"
exit 0
}
[ -n "$(echo $1 | sed -n '/^\[.*\]$/p')" ] && {
gph_to_id "$1"
exit 0
}
echo "No valid URL or gph selector provided" >&2
exit 1
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