#!/bin/sh
-# Copyright 2017 Paul Hänsch
+# Copyright 2017 - 2018 Paul Hänsch
#
# This is CGIlite.
# A collection of posix shell functions for writing CGI scripts.
# set -o posix # ksh, not portable
setopt -o OCTAL_ZEROES 2>&-
+BR="$(printf '\n')"
+CR="$(printf '\r')"
+
+HEADER(){
+ # Read value of header line. Use this instead of
+ # referencing HTTP_* environment variables.
+ if [ -n "${cgilite_headers+x}" ]; then
+ printf %s "$cgilite_headers" \
+ | sed -rn 's;^'"${1}"': ([^\r]+)\r?$;\1;i; tX; d; :X;p;q;'
+ else
+ eval "printf %s \"\$HTTP_$(printf %s "${1}" |tr a-z A-Z |tr -c A-Z _)\""
+ fi
+}
+
+HEX_DECODE(){
+ printf "$(printf %s "$1" \
+ | sed -r '
+ s;\\;\\\\;g; :x; s;%([^0-9A-F]);\\045\1;g; tx;
+ # Hexadecimal { %00 - %FF } will be transformed to octal { \000 - \377 } for posix printf
+ s;%[0123].;&\\0;g; s;%[4567].;&\\1;g; s;%[89AB].;&\\2;g; s;%[CDEF].;&\\3;g;
+ s;%[048C][0-7]\\.;&0;g; s;%[048C][89A-F]\\.;&1;g; s;%[159D][0-7]\\.;&2;g; s;%[159D][89A-F]\\.;&3;g;
+ s;%[26AE][0-7]\\.;&4;g; s;%[26AE][89A-F]\\.;&5;g; s;%[37BF][0-7]\\.;&6;g; s;%[37BF][89A-F]\\.;&7;g;
+ s;%.[08](\\..);\10;g; s;%.[19](\\..);\11;g; s;%.[2A](\\..);\12;g; s;%.[3B](\\..);\13;g;
+ s;%.[4C](\\..);\14;g; s;%.[5D](\\..);\15;g; s;%.[6E](\\..);\16;g; s;%.[7F](\\..);\17;g;
+ ')"
+}
+
+if [ -z "$REQUEST_METHOD" -a -z "$SERVER_PROTOCOL" ]; then
+ # no webserver variables means we are running via inetd / ncat
+ # so use builtin web server
+ REMOTE_ADDR="${TCPREMOTEIP:-$NCAT_REMOTE_ADDR}"
+ SERVER_NAME="${TCPLOCALIP:-$NCAT_LOCAL_ADDR}"
+ SERVER_PORT="${TCPLOCALPORT:-$NCAT_LOCAL_PORT}"
+
+ read REQUEST_METHOD REQUEST_URI SERVER_PROTOCOL
+ PATH_INFO="$(HEX_DECODE "${REQUEST_URI%\?*}")"
+ QUERY_STRING="${REQUEST_URI#*\?}"
+ cgilite_headers="$(sed -u '/^\r\?$/q')"
+
+ HTTP_CONTENT_LENGTH="$(HEADER Content-Length |grep -xE '[0-9]+')"
+
+ export REMOTE_ADDR SERVER_NAME SERVER_PORT REQUEST_METHOD REQUEST_URI SERVER_PROTOCOL \
+ PATH_INFO QUERY_STRING HTTP_CONTENT_LENGTH
+
+ . "$0" |sed '1{s;^Status: ;HTTP/1.0 ;; t; s;^;HTTP/1.0 200 OK\r\n;;}'
+ exit $?
+fi
+
if [ "$REQUEST_METHOD" = POST -a "${HTTP_CONTENT_LENGTH:=${CONTENT_LENGTH:=0}}" -gt 0 ]; then
cgilite_post="$(head -c "$HTTP_CONTENT_LENGTH")"
fi
+[ -n "${DEBUG+x}" ] && env
+
cgilite_count(){
case $1 in
GET) printf %s "&${QUERY_STRING}";;
}
cgilite_value(){
- printf "$(
+ HEX_DECODE "$(
case $1 in
GET) printf %s "&${QUERY_STRING}";;
POST) printf %s "&${cgilite_post}";;
REF) printf %s "&${HTTP_REFERER#*\?}";;
esac \
| grep -Eo '&'"$2"'=[^&]*' \
- | sed -rn "${3:-1}"'{s;^[^=]+=;;; s;\+; ;g; s;\\;\\\\;g;
- # Hexadecimal { %00 - %FF } will be transformed to octal { \000 - \377 } for posix printf
- s;%[0123].;&\\0;g; s;%[4567].;&\\1;g; s;%[89AB].;&\\2;g; s;%[CDEF].;&\\3;g;
- s;%[048C][0-7]\\.;&0;g; s;%[048C][89A-F]\\.;&1;g; s;%[159D][0-7]\\.;&2;g; s;%[159D][89A-F]\\.;&3;g;
- s;%[26AE][0-7]\\.;&4;g; s;%[26AE][89A-F]\\.;&5;g; s;%[37BF][0-7]\\.;&6;g; s;%[37BF][89A-F]\\.;&7;g;
- s;%.[08](\\..);\10;g; s;%.[19](\\..);\11;g; s;%.[2A](\\..);\12;g; s;%.[3B](\\..);\13;g;
- s;%.[4C](\\..);\14;g; s;%.[5D](\\..);\15;g; s;%.[6E](\\..);\16;g; s;%.[7F](\\..);\17;g;
- p}'
+ | sed -rn "${3:-1}"'{s;^[^=]+=;;; s;\+; ;g; p;}'
)"
}
REF_COUNT(){ cgilite_count REF $1; }
COOKIE(){
- printf "$(
- printf %s " ${HTTP_COOKIE}" \
- | grep -Eo '[; ]'"$1"'=[^;]*' \
- | sed -rn "${2:-1}"'{s;^[^=]+=;;; s;\+; ;g; s;\\;\\\\;g;
- # Hexadecimal { %00 - %FF } will be transformed to octal { \000 - \377 } for posix printf
- s;%[0123].;&\\0;g; s;%[4567].;&\\1;g; s;%[89AB].;&\\2;g; s;%[CDEF].;&\\3;g;
- s;%[048C][0-7]\\.;&0;g; s;%[048C][89A-F]\\.;&1;g; s;%[159D][0-7]\\.;&2;g; s;%[159D][89A-F]\\.;&3;g;
- s;%[26AE][0-7]\\.;&4;g; s;%[26AE][89A-F]\\.;&5;g; s;%[37BF][0-7]\\.;&6;g; s;%[37BF][89A-F]\\.;&7;g;
- s;%.[08](\\..);\10;g; s;%.[19](\\..);\11;g; s;%.[2A](\\..);\12;g; s;%.[3B](\\..);\13;g;
- s;%.[4C](\\..);\14;g; s;%.[5D](\\..);\15;g; s;%.[6E](\\..);\16;g; s;%.[7F](\\..);\17;g;
- p}'
+ HEX_DECODE "$(
+ HEADER Cookie \
+ | grep -oE '(^|; ?)'"$1"'=[^;]*' \
+ | sed -rn "${2:-1}"'{s;^[^=]+=;;; s;\+; ;g; p;}'
)"
}
printf 'Status: 303 See Other\r\nLocation: %s\r\n\r\n' "$*"
exit 0
}
+