updated copyright line

[cgilite] / cgilite.sh

diff --git a/cgilite.sh b/cgilite.sh
index 3212137e68bcb262b338256d29b29d952c3ca9d1..1d8d30a5af91eff5d65fb6bc60e116525a837708 100755 (executable)
--- a/cgilite.sh
+++ b/cgilite.sh
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-# Copyright 2017 - 2018 Paul Hänsch
+# Copyright 2017 - 2020 Paul Hänsch
 #
 # This is CGIlite.
 # A collection of posix shell functions for writing CGI scripts.
@@ -31,8 +31,10 @@ 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;'
+    local h="${BR}${cgilite_headers}"
+    [ "${h##*${BR}${1}: }" = "${h}" ] && return 1
+    h="${h##*${BR}${1}: }" h="${h%%${BR}*}"
+    printf %s "${h%${CR}}"
   else
     eval "printf %s \"\$HTTP_$(printf %s "${1}" |tr a-z A-Z |tr -c A-Z _)\""
   fi
@@ -49,7 +51,7 @@ HEX_DECODE='
 '
 
 HEX_DECODE(){
-  printf -- "$(printf %s "$1" |sed -r "$HEX_DECODE")"
+  printf -- "$(printf %s "$1" |sed -E "$HEX_DECODE")"
 }
 
 if [ -z "$REQUEST_METHOD" ]; then
@@ -71,9 +73,13 @@ if [ -z "$REQUEST_METHOD" ]; then
     kill $cgilite_watchdog
     PATH_INFO="$(HEX_DECODE "${REQUEST_URI%\?*}")"
     QUERY_STRING="${REQUEST_URI#*\?}"
-    cgilite_headers="$(while read -r hl; do [ "${hl%${CR}}" ] && printf '%s\n' "$hl" || break; done )"
+    cgilite_headers=''; while read -r hl; do
+      [ "${hl%${CR}}" ] || break
+      cgilite_headers="${cgilite_headers}${hl}${BR}"
+    done
 
-    HTTP_CONTENT_LENGTH="$(HEADER Content-Length |grep -xE '[0-9]+')"
+    HTTP_CONTENT_LENGTH="$(HEADER Content-Length)"
+    HTTP_CONTENT_LENGTH="${HTTP_CONTENT_LENGTH##*[^0-9]}"
 
     export REMOTE_ADDR SERVER_NAME SERVER_PORT REQUEST_METHOD REQUEST_URI SERVER_PROTOCOL \
            PATH_INFO QUERY_STRING HTTP_CONTENT_LENGTH
@@ -87,15 +93,17 @@ if [ -z "$REQUEST_METHOD" ]; then
     . "$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' \
+      $CR) printf '%s %s\r\n%s%s\n\r\n' \
              'HTTP/1.1' "${cgilite_status%${CR}}" \
-             "$cgilite_response" "${cgilite_cl}"
-           cat
+             "${cgilite_response}${cgilite_response:+${BR}}" "${cgilite_cl}"
+           cat || kill $$
            [ "${cgilite_cl#Connection}" = "${cgilite_cl}" ]; exit;;
-      *) cgilite_response="$cgilite_response${BR}$l";;
+      *) cgilite_response="${cgilite_response:+${cgilite_response}${BR}}${l}";;
     esac; done || exit 0;
     (sleep $cgilite_timeout && kill $$) & cgilite_watchdog=$!
   done
+  kill $cgilite_watchdog
+  exit 0
 fi
 
 if [ "$REQUEST_METHOD" = POST -a "${HTTP_CONTENT_LENGTH:=${CONTENT_LENGTH:=0}}" -gt 0 ]; then
@@ -116,23 +124,35 @@ cgilite_value(){
     str=${str#*&${name}=}
     cnt=$((cnt - 1))
   done
-  printf -- "$(printf %s "${str%%&*}" |sed -r 's;\+; ;g;'"$HEX_DECODE")"
+  printf -- "$(printf %s "${str%%&*}" |sed -E 's;\+; ;g;'"$HEX_DECODE")"
+}
+
+cgilite_keys(){
+  local str="&$1"
+  while [ "${str#*&}" != "${str}" ]; do
+    str="${str#*&}"
+    printf '%s\n' "${str%%=*}"
+  done \
+  | sort -u
 }
 
 GET(){ cgilite_value "${QUERY_STRING}" $@; }
 GET_COUNT(){ cgilite_count "${QUERY_STRING}" $1; }
+GET_KEYS(){ cgilite_keys "${QUERY_STRING}"; }
 
 POST(){ cgilite_value "${cgilite_post}" $@; }
 POST_COUNT(){ cgilite_count "${cgilite_post}" $1; }
+POST_KEYS(){ cgilite_keys "${cgilite_post}"; }
 
 REF(){ cgilite_value "${HTTP_REFERER#*\?}" $@; }
 REF_COUNT(){ cgilite_count "${HTTP_REFERER#*\?}" $1; }
+REF_KEYS(){ cgilite_keys "${HTTP_REFERER#*\?}"; }
 
 COOKIE(){
   HEX_DECODE "$(
     HEADER Cookie \
     | grep -oE '(^|; ?)'"$1"'=[^;]*' \
-    | sed -rn "${2:-1}"'{s;^[^=]+=;;; s;\+; ;g; p;}'
+    | sed -En "${2:-1}"'{s;^[^=]+=;;; s;\+; ;g; p;}'
   )"
 }
 
@@ -153,7 +173,7 @@ HTML(){
       36?) printf '%s' ${n#36};;   # 4 octet (21 bit) chain start
     esac
   done \
-  | sed -r 's;.{7};&\n;g;' \
+  | sed -E 's;.{7};&\n;g;' \
   | while read n; do
     printf '&#%d;' $((0$n))
   done
@@ -170,7 +190,7 @@ URL(){
 
 PATH(){
   { [ $# -eq 0 ] && cat || printf %s "$*"; } \
-  | sed -r 's;^.*$;/&/;; s;/+;/;g;
+  | sed -E 's;^.*$;/&/;; s;/+;/;g;
             :X;
             s;^/\.\./;/;; s;/\./;/;g;
             tX;