+# set -o posix # ksh, not portable
+setopt -o OCTAL_ZEROES 2>&-
+
+# Integrated webserver request timeout
+cgilite_timeout=2
+
+# General environment variables
+# $_EXEC - directory containing application itself
+# $_DATA - direcotry where application data may be stored
+# $_BASE - optional prefix for http path, e.g. "/myapp"
+#
+# Programmers should take care to use those variables throughout the
+# application.
+# Variables may be set via CLI argument, in environment, or left as default.
+
+for cgilite_arg in "$@"; do case $cgilite_arg in
+ --exec=*) _EXEC="${cgilite_arg#*=}";;
+ --data=*) _DATA="${cgilite_arg#*=}";;
+ --base=*) _BASE="${cgilite_arg#*=}";;
+esac; done
+unset cgilite_arg
+
+_EXEC="${_EXEC:-${0%/*}}"
+_DATA="${_DATA:-.}"
+_EXEC="${_EXEC%/}" _DATA="${_DATA%/}" _BASE="${_BASE%/}"
+
+# Carriare Return and Line Break characters for convenience
+CR="\r"
+BR='
+'
+
+PATH(){
+ local str seg out
+ # normalize path
+ # read from stdin if no arguments are provided
+
+ [ $# -eq 0 ] && str="$(cat)" || str="$*"
+ while [ "$str" ]; do
+ seg=${str%%/*}; str="${str#*/}"
+ case $seg in
+ ..) out="${out%/}"; out="${out%/*}/";;
+ .|'') out="${out%/}/";;
+ *) out="${out%/}/${seg}";;
+ esac;
+ [ "$seg" = "$str" ] && break
+ done
+ [ "${str}" -a "${out}" ] && printf %s "$out" || printf %s/ "${out%/}"
+}
+
+HEX_DECODE(){
+ local pfx="$1" in="$2" out
+ # Print out Data encoded as Hex
+ #
+ # Arguments:
+ # pfx - required, prefix for a hex tupel, e.g. "\x", "%" "\", may be empty
+ # in - required, string to be decoded
+ #
+ # anything that does not constitute a tupel of valid Hex numerals
+ # will be copied to the output literally
+
+ while [ "$in" ]; do
+ case $in in
+ "$pfx"[0-9a-fA-F][0-9a-fA-F]*) in="${in#${pfx}}";;
+ \\*) in="${in#?}"; out="${out}\\\\"; continue;;
+ %*) in="${in#?}"; out="${out}%%"; continue;;
+ *) out="${out}${in%"${in#?}"}"; in="${in#?}"; continue;;
+ esac;
+
+ # Hex escaes for printf (e.g. \x41) are not portable
+ # The portable way for Hex output is transforming Hex to Octal
+ # (e.g. \x41 = \101)
+ case $in in
+ [0123]?*) out="${out}\\0";;
+ [4567]?*) out="${out}\\1";;
+ [89aAbB]?*) out="${out}\\2";;
+ [c-fC-F]?*) out="${out}\\3";;
+ esac
+ case $in in
+ [048cC][0-7]*) out="${out}0";;
+ [048cC][89a-fA-F]*) out="${out}1";;
+ [159dD][0-7]*) out="${out}2";;
+ [159dD][89a-fA-F]*) out="${out}3";;
+ [26aAeE][0-7]*) out="${out}4";;
+ [26aAeE][89a-fA-F]*) out="${out}5";;
+ [37bBfF][0-7]*) out="${out}6";;
+ [37bBfF][89a-fA-F]*) out="${out}7";;
+ esac
+ case $in in
+ ?[08]*) out="${out}0";;
+ ?[19]*) out="${out}1";;
+ ?[2aA]*) out="${out}2";;
+ ?[3bB]*) out="${out}3";;
+ ?[4cC]*) out="${out}4";;
+ ?[5dD]*) out="${out}5";;
+ ?[6eE]*) out="${out}6";;
+ ?[7fF]*) out="${out}7";;
+ esac
+ in="${in#?}"
+ in="${in#?}"
+ done
+ printf -- "$out"
+}
+
+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 $$) & cgilite_watchdog=$!
+ while read REQUEST_METHOD REQUEST_URI SERVER_PROTOCOL; do
+ [ "${SERVER_PROTOCOL#HTTP/1.[01]${CR}}" ] && break
+ kill $cgilite_watchdog
+
+ SERVER_PROTOCOL="${SERVER_PROTOCOL%${CR}}"
+ PATH_INFO="$(HEX_DECODE % "${REQUEST_URI%\?*}" |PATH)"
+ [ "${REQUEST_URI}" = "${REQUEST_URI#*\?}" ] \
+ && QUERY_STRING='' \
+ || QUERY_STRING="${REQUEST_URI#*\?}"
+ cgilite_headers=''; while read -r hl; do
+ hl="${hl%${CR}}"; [ "$hl" ] || break
+ case $hl in
+ 'Content-Length: '*) CONTENT_LENGTH="${hl#*: }";;
+ 'Content-Type: '*) CONTENT_TYPE="${hl#*: }";;
+ esac
+ cgilite_headers="${cgilite_headers}${hl}${BR}"
+ done
+
+ export REMOTE_ADDR SERVER_NAME SERVER_PORT REQUEST_METHOD REQUEST_URI SERVER_PROTOCOL \
+ PATH_INFO QUERY_STRING CONTENT_TYPE CONTENT_LENGTH
+
+ # Try to serve multiple requests, provided that script serves a
+ # Content-Length header.
+ # Without Content-Length header, connection will terminate after
+ # script.
+
+ cgilite_status='200 OK'; cgilite_response=''; cgilite_cl="Connection: close${CR}${BR}";
+ . "$0" | while read -r l; do case $l in
+ Status:*)
+ cgilite_status="${l#Status: }";;
+ Content-Length:*)
+ cgilite_cl=""
+ cgilite_response="${cgilite_response:+${cgilite_response}${BR}}${l}";;
+ Connection:*)
+ cgilite_cl="${l}${BR}";;
+ $CR) printf '%s %s\r\n%s%s\r\n' \
+ 'HTTP/1.1' "${cgilite_status%${CR}}" \
+ "${cgilite_response}${cgilite_response:+${BR}}" "${cgilite_cl}"
+ cat || kill $$
+ [ "${cgilite_cl#Connection}" = "${cgilite_cl}" ]; exit;;
+ *) cgilite_response="${cgilite_response:+${cgilite_response}${BR}}${l}";;
+ esac; done || exit 0;
+ (sleep $cgilite_timeout && kill $$) & cgilite_watchdog=$!
+ done
+ kill $cgilite_watchdog
+ exit 0
+fi
+
+include_cgilite="$0"