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gosher
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fix on nc invocation and several fixes on regexp

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master
Hiltjo Posthuma 7 years ago committed by KatolaZ
parent 3ed2653b14
commit e86c8c70ad
2 changed files with 46 additions and 62 deletions
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  1. 53
      gosher
  2. 55
      gosher.8

53
gosher
Unescape View File

@ -4,12 +4,12 @@
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or (at
# your option) any later version.
#
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
@ -21,7 +21,7 @@
##
## $ ./gosher [<GOPHERDIR> [<HOSTNAME> [<PORT>]]]
##
## If GOPHERDIR is not specified, "./" is assumed.
## If GOPHERDIR is not specified, "./" is assumed.
## If HOSTNAME is not specified, "localhost" is used.
## If PORT is not specified, the default port "70" is used.
##
@ -45,8 +45,8 @@
### ncat (from nmap)
##NETCAT="ncat"
##
### Openbsd netcat
NETCAT="nc.openbsd"
### OpenBSD netcat
NETCAT="nc"
##
## STYLE: The way in which netcat will talk to gosher_serve
@ -65,8 +65,7 @@ DEBUG=
[ -n "$DEBUG" ] && {
set -e
set -x
set -e -x
}
@ -77,7 +76,7 @@ cleanup(){
}
MYNAME=$(basename "$0")
MYDIR=$(dirname "$(realpath "$0")")
MYDIR=$(dirname "$(readlink -f "$0")")
NETCAT=$(which "$NETCAT")
if [ -z "${MYNAME#gosher}" ]; then
@ -85,16 +84,16 @@ if [ -z "${MYNAME#gosher}" ]; then
GOPHERDIR=${1:-"./"}
HOSTNAME=${2:-"localhost"}
PORT=${3:-70}
[ ! -f "${NETCAT}" ] || [ ! -x "${NETCAT}" ] && {
echo "Wrong NETCAT -- Exiting" >&2
exit 2
}
if [ -f "${MYDIR}/gosher_serve" ] || [ -h "${MYDIR}/gosher_serve" ]; then
GOSHER_SERVE="${MYDIR}/gosher_serve"
trap cleanup 0 HUP INT TRAP TERM QUIT
INF="${IPREFIX}$$"
[ "$STYLE" = "pipe" ] && {
mkfifo -m 600 "$INF"
@ -103,7 +102,7 @@ if [ -z "${MYNAME#gosher}" ]; then
# shellcheck disable=SC2094
${GOSHER_SERVE} "${GOPHERDIR}" \
"${HOSTNAME}" "${PORT}" <"$INF" |\
${NETCAT} -vvvvv -l -p "${PORT}" >"$INF"
${NETCAT} -vvvvv -l "${HOSTNAME}" "${PORT}" >"$INF"
done
rm -f $INF
exit 0
@ -161,16 +160,16 @@ serve_index(){
IDX=$1
IFS='
'
echo "[$(date +%Y-%m-%d\ %H:%M:%S)|GPH|${IDX}|\"\"]" >&2
while read -r line; do
rline=$(echo "$line" | sed -r -e 's/\r//g')
rline=$(echo "$line" | tr -d '\r')
case "$rline" in
'['*)
echo "$rline" | sed -r -e 's/\[//g;s/\]//g;s/\|/\t/g;s/\t//;s/$/\r/g'
echo "$rline" | sed -r -e 's/\[//g;s/\]//g;s/\|/ /g;s/ //;s/$/\r/g'
;;
t*)
echo "$rline" | cut -c 2-
echo "$rline" | cut -c 2-
;;
*)
echo "$line"
@ -187,7 +186,7 @@ serve_index(){
## function
serve_redirect(){
url=$1
echo "[$(date +%Y-%m-%d\ %H:%M:%S)|REDIRECT|${url}|\"\"]" >&2
cat<< EOF
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
@ -225,12 +224,12 @@ serve_cgi(){
SERVER_SOFTWARE="gosher"
####X_GOPHER_SEARCH= search (See above.)
export GATEWAY_INTERFACE PATH_INFO PATH_TRANSLATED QUERY_STRING
export REMOTE_ADDR REMOTE_HOST REQUEST_METHOD SCRIPT_NAME
export REMOTE_ADDR REMOTE_HOST REQUEST_METHOD SCRIPT_NAME
export SERVER_NAME SERVER_PORT SERVER_PROTOCOL SERVER_SOFTWARE
${GOPHERDIR}${script_name} "" "${query_string}" "${HOSTNAME}" "${PORT}" 2>&1
exec 1>&-
exec 2>&-
exit $?
exit $?
}
@ -240,7 +239,7 @@ PORT=${3:-"70"}
read -r selector
selector=$(echo "$selector" | sed -r 's:\$.*::g;s:\r::g' )
selector=$(echo "$selector" | tr -d '\r' )
[ -n "$DEBUG" ] && {
echo "iGOPHERDIR: ${GOPHERDIR}"
@ -258,10 +257,10 @@ case $selector in
script_name=$(echo "$selector" | cut -d "?" -f 1)
query_string=$(echo "$selector" | cut -d "?" -f 2)
[ "${script_name}" = "${query_string}" ] && query_string=""
RP1=$(realpath "${GOPHERDIR}""${script_name}" || "")
RP1=$(readlink -f "${GOPHERDIR}""${script_name}" || "")
# shellcheck disable=SC2181
[ $? -eq 0 ] || invalid_selector "${selector}"
RP2=$(realpath "${GOPHERDIR}")"${script_name}"
RP2=$(readlink -f "${GOPHERDIR}")"${script_name}"
RP2=$(echo "${RP2}" | sed -r 's/\/+/\//g')
# shellcheck disable=SC2181
[ $? -eq 0 ] || invalid_selector "${selector}"
@ -269,7 +268,7 @@ case $selector in
echo "iRP1: ${RP1}"
echo "iRP2: ${RP2}"
}
[ "${RP1}" = "${RP2}" ] && {
[ -x "${RP1}" ] && {
serve_cgi "${script_name}" "${query_string}"
@ -279,20 +278,20 @@ case $selector in
;;
/?*|"")
## it's a regular selector
RP1=$(realpath "${GOPHERDIR}"/"${selector}" || "")
RP1=$(readlink -f "${GOPHERDIR}"/"${selector}" || "")
# shellcheck disable=SC2181
[ $? -eq 0 ] || invalid_selector "$selector"
RP2=$(realpath "${GOPHERDIR}")"${selector}"
RP2=$(readlink -f "${GOPHERDIR}")"${selector}"
# shellcheck disable=SC2181
[ $? -eq 0 ] || invalid_selector "$selector"
[ -n "$DEBUG" ] && {
echo "iRP1: ${RP1}"
echo "iRP2: ${RP2}"
}
if [ "${RP1}" = "${RP2}" ]; then
if [ -f "${RP1}" ]; then
if [ -n "$(echo "${RP1}" | sed -n '/\.gph$/p')" ]; then
if [ -n "$(echo "${RP1}" | sed -n '/\.gph$/p')" ]; then
serve_index "${RP1}"
else
serve_selector "${RP1}"

55
gosher.8
Unescape View File

@ -4,61 +4,46 @@
.Os Linux
.Sh NAME
.Nm gosher
.Nd a Gopher server in a shell script
.Nd a Gopher server in a shell script
.Sh SYNOPSIS
.Nm gosher
.Op Ar GOPHERDIR Op Ar HOSTNAME Op Ar PORT
.Sh DESCRIPTION
.Pp
.Ic gosher
.Nm
is a server for the Gopher protocol (RFC 1436) in a POSIX shell
script.
.Pp
Gopher is a textual protocol for information exchange over the Internet,
that provides a unified hierarchical menu-based interface. The Gopher
protocol has assigned port 70 by IANA.
that provides a unified hierarchical menu-based interface.
The Gopher protocol has assigned port 70 by IANA.
.Pp
.Ic gosher
.Nm
uses
.Em netcat(1)
to listen for incoming connections on the specified
.Xr nc 1
to listen for incoming connections on the specified
.Ar HOSTNAME
(defaults to 'localhost' if not specified) and
(defaults to 'localhost' if not specified) and
.Ar PORT
(defaults to 70 if
(defaults to 70 if
.Ar PORT
is not specified) and makes available all the files under the folder
.Ar GOPHERDIR
(defaults to the current directory if not specified).
.\" This next request is for sections 1, 6, 7 & 8 only
.\".Sh ENVIRONMENT
.\".Sh EXAMPLES
.\" This next request is for sections 1, 6, 7 & 8 only
.\" (command return values (to shell) and
.\" fprintf/stderr type diagnostics)
.\" .Sh DIAGNOSTICS
(defaults to the current directory if not specified).
.Sh SEE ALSO
lynx(1), gopher(1), sacc(1), clic(1)
.\" .Sh CONFORMING TO
.\" .Sh HISTORY
.Xr clic 1 ,
.Xr gopher 1 ,
.Xr lynx 1 ,
.Xr sacc 1 ,
.Sh AUTHORS
.Ic gosher
.Nm
is Free Software, distributed under the terms of the GNU
General Public License (GPL), version 3 of the License.
.Pp
.Ic gosher
.Nm
is copyleft (c) 2018 by
.An Vincenzo (KatolaZ) Nicosia <katolaz@freaknet.org>
.An Vincenzo (KatolaZ) Nicosia Aq Mt katolaz@freaknet.org
.Sh SECURITY CONSIDERATIONS
It is recommended to run
.Ic gosher
under chroot(8).
.Nm
under
.Xr chroot 8 .

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