first commit

gprsh

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+#!/bin/sh
+
+##
+##        === gprsh ===
+##
+##  gprsh is a simple gopher server in a POSIX shell script:
+##
+##     $ ./gprsh [<PORT> [<GOPHERDIR>]
+##
+##  If PORT is not specified, the default is 70. If GOPHERDIR is not
+##  specified, "./" is assumed
+##
+##  
+##  (c) 2018 Vincenzo 'KatolaZ' Nicosia <katolaz@freaknet.org>
+##  
+##
+
+######################
+
+##
+## If the script is called with basename "gprsh", launch the netcat
+## server...
+##
+
+MYNAME=$(basename $0)
+
+if [ -z "${MYNAME#gprsh}" ]; then 
+	## we are called as gprsh -- launch the server
+
+	PORT=${1:-70}
+	GOPHERDIR=${2:-"./"}
+	
+	while [ 1 -eq 1 ]; do 
+        	netcat -vv -k -l -p ${PORT} -c "./gprsh_serve ${GOPHERDIR}"
+		ret=$?
+	done
+	exit 0 
+fi
+
+
+######################
+
+##
+## ...otherwise, serve a request
+##
+
+
+## function
+invalid_selector(){
+	sel="$1"
+	echo "iInvalid selector: \"$sel\""
+	echo "."
+	exit 1
+}
+
+## function
+serve_selector(){
+	sel="$1"	
+
+	cat "${sel}"
+	echo "."
+	exit 0
+}
+
+
+### transform a .gph file into a gophermap
+## function
+serve_index(){
+        IDX=$1
+        IFS='
+'
+        while read line; do
+                rline=$(echo $line | sed -r -e 's/\r//g')
+                case $rline in 
+                        '['*)
+                                echo $rline | sed -r -e 's/\[//g;s/\]//g;s/\|/\t/g;s/\t//;s/$/\r/g'
+                        ;;
+                        *)
+                                echo $line
+                esac
+        done < $IDX
+	exit 0
+}
+
+
+
+GOPHERDIR=${1:-"./"}
+
+read selector
+
+selector=$(echo $selector | sed -r 's:\r::g' )
+
+echo "iGOPHERDIR: ${GOPHERDIR}"
+echo "iselector: \"${selector}\""
+
+case $selector in
+	/*|"")
+		RP1=$(realpath "${GOPHERDIR}"/"${selector}" || "")
+		RP2=$(realpath "${GOPHERDIR}")"${selector}"
+		echo "iRP1: ${RP1}"
+		echo "iRP2: ${RP2}"
+		#echo "."
+		
+		if [ "${RP1}" = "${RP2}" ]; then 
+			if [ -f "${RP1}" ]; then  
+				serve_selector "${RP1}"
+			elif [ -d "${RP1}" ]; then 
+				[ -f "${RP1}/gophermap" ] && serve_selector "${RP1}/gophermap"
+				[ -f "${RP1}/index.gph" ] && serve_index "${RP1}/index.gph"
+			else	
+				echo "3Err	Unable to find file ${selector}"
+			fi
+		fi	
+		invalid_selector "$selector"		
+	;;
+	*)
+		[ -f "${GOPHERDIR}/gophermap" ] && cat "${GOPHERDIR}/gophermap" && echo "." && exit 0 
+		invalid_selector "/"
+	;;
+esac
+

gprsh_serve

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+gprsh