#!/bin/sh
-# Copyright 2017 Paul Hänsch
+# Copyright 2017 - 2018 Paul Hänsch
#
# This is CGIlite.
# A collection of posix shell functions for writing CGI scripts.
BR="$(printf '\n')"
CR="$(printf '\r')"
+cgilite_timeout=2
HEADER(){
- if [ -n "$cgilite_headers+x" ]; then
+ # Read value of header line. Use this instead of
+ # referencing HTTP_* environment variables.
+ if [ -n "${cgilite_headers+x}" ]; then
printf %s "$cgilite_headers" \
- | sed -rn 's;^'"${1}"': ([^\r]+)\r?$;\1;ip;q;'
+ | sed -rn 's;^'"${1}"': ([^\r]+)\r?$;\1;i; tX; d; :X;p;q;'
else
- eval $(printf 'printf $HTTP_'; printf '%s' "${1}" |tr '[a-z]-' '[A-Z]_')
+ eval "printf %s \"\$HTTP_$(printf %s "${1}" |tr a-z A-Z |tr -c A-Z _)\""
fi
}
-if [ "$1" = '--inetd' -a -z "$REQUEST_METHOD" ]; then
- 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="${REQUEST_URI%\?*}"
- QUERY_STRING="${REQUEST_URI#*\?}"
- cgilite_headers="$(sed -u '/^\r\?$/q')"
-
- HTTP_CONTENT_LENGTH="$(HEADER Content-Length |grep -xE '[0-9]+')"
- HTTP_COOKIE="$(HEADER Cookie)"
-
- export REMOTE_ADDR SERVER_NAME SERVER_PORT REQUEST_METHOD REQUEST_URI SERVER_PROTOCOL \
- PATH_INFO QUERY_STRING HTTP_CONTENT_LENGTH HTTP_COOKIE
+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;
+ ')"
+}
- . "$0" |sed '1{s;^Status: ;HTTP/1.0 ;; t; iHTTP/1.0 200 OK\r
- }'
- exit $?
+if [ -z "$REQUEST_METHOD" ]; then
+ # no webserver variables means we are running via inetd / ncat
+ # so use builtin web server
+
+ # Use env from inetd as webserver variables
+ REMOTE_ADDR="${TCPREMOTEIP}"
+ SERVER_NAME="${TCPLOCALIP}"
+ SERVER_PORT="${TCPLOCALPORT}"
+
+ # Wait 2 seconds for request or kill connection through watchdog.
+ # Once Request is received the watchdog will be suspended (killed).
+ # At the end of the loop the watchdog will be restarted to enable
+ # timeout for the subsequent request.
+
+ (sleep $cgilite_timeout && kill $$) & cgilite_watchdog=$!
+ while read REQUEST_METHOD REQUEST_URI SERVER_PROTOCOL; do
+ kill $cgilite_watchdog
+ PATH_INFO="$(HEX_DECODE "${REQUEST_URI%\?*}")"
+ QUERY_STRING="${REQUEST_URI#*\?}"
+ cgilite_headers="$(sed -u '/^\r\?$/q')"
+
+ HTTP_CONTENT_LENGTH="$(HEADER Content-Length |grep -xE '[0-9]+')"
+
+ export REMOTE_ADDR SERVER_NAME SERVER_PORT REQUEST_METHOD REQUEST_URI SERVER_PROTOCOL \
+ PATH_INFO QUERY_STRING HTTP_CONTENT_LENGTH
+
+ # Try to serve multiple requests, provided that script serves a
+ # Content-Length header.
+ # Without Content-Length header, connection will terminate after
+ # script.
+
+ cgilite_status='200 OK'; cgilite_response=''; cgilite_cl="Connection: close${CR}";
+ . "$0" | while read -r l; do case $l in
+ Status:*) cgilite_status="${l#Status: }";;
+ Content-Length:*) cgilite_cl="${l}";;
+ $CR) printf '%s %s\r\n%s\n%s\n\r\n' \
+ 'HTTP/1.1' "${cgilite_status%${CR}}" \
+ "$cgilite_response" "${cgilite_cl}"
+ cat
+ [ "${cgilite_cl#Connection}" = "${cgilite_cl}" ]; exit;;
+ *) cgilite_response="$cgilite_response${BR}$l";;
+ esac; done || exit 0;
+ (sleep $cgilite_timeout && kill $$) & cgilite_watchdog=$!
+ done
fi
if [ "$REQUEST_METHOD" = POST -a "${HTTP_CONTENT_LENGTH:=${CONTENT_LENGTH:=0}}" -gt 0 ]; then
}
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 $1; }
COOKIE(){
- printf "$(
+ HEX_DECODE "$(
HEADER Cookie \
| grep -oE '(^|; ?)'"$1"'=[^;]*' \
- | sed -rn "${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}'
+ | sed -rn "${2:-1}"'{s;^[^=]+=;;; s;\+; ;g; p;}'
)"
}
-COOKIE foo
-echo
-COOKIE bar
-
HTML(){
# HTML Entity Coding
# Prints UTF-8 string as decimal Unicode Code Points
printf %s "$*" \
| hexdump -v -e '/1 ",%02X"' \
- | tr , %
+ | tr , % |sed 's;%2F;/;g;'
}
+PATH(){
+ printf %s "$1" \
+ | sed -r 's;^.*$;/&/;; s;/+;/;g;
+ :X;
+ s;^/\.\./;/;; s;/\./;/;g;
+ tX;
+ s;/[^/]+/\.\./;/;;
+ tX;
+ s;^(/.*)/$;\1;'
+}
+
+
SET_COOKIE(){
+ local expire cookie
case "$1" in
''|0|session) expire='';;
[+-][0-9]*) expire="$(date -R -d @$(($(date +%s) + $1)))";;
- *) expire="$(date -R -d "$1")";;
+ *) expire="$(date -R -d "$1")";;
esac
cookie="$2"
-
+
printf 'Set-Cookie: %s' "$cookie"
- [ -n "$expire" ] && printf '; Expires=%s' "$expire"
+ [ -n "$expire" ] && printf '; Expires=%s' "${expire%+????}${expire:+GMT}"
[ $# -ge 3 ] && shift 2 && printf '; %s' "$@"
printf '\r\n'
}
REDIRECT(){
- printf 'Status: 303 See Other\r\nLocation: %s\r\n\r\n' "$*"
+ printf '%s: %s\r\n' \
+ Status "303 See Other" \
+ Content-Length 0 \
+ Location "$*"
+ printf '\r\n'
exit 0
}
-
projects / cgilite / blobdiff