From fcb3e2096bd811a910c686bbfe181708878ba8b4 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Paul=20H=C3=A4nsch?= <paul@plutz.net>
Date: Wed, 18 Jul 2018 04:31:33 +0200
Subject: [PATCH] huge speed gain for GET() and POST()

---
 cgilite.sh | 56 ++++++++++++++++++++++++------------------------------
 1 file changed, 25 insertions(+), 31 deletions(-)

diff --git a/cgilite.sh b/cgilite.sh
index e1b3480..996fe9d 100755
--- a/cgilite.sh
+++ b/cgilite.sh
@@ -37,17 +37,18 @@ HEADER(){
   fi
 }
 
+HEX_DECODE='
+  s;\\;\\\\;g; :HEXDECODE_X; s;%([^0-9A-F]);\\045\1;g; tHEXDECODE_X;
+  # 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;
+'
+
 HEX_DECODE(){
-  printf "$(printf %s "$1" \
-  | sed -r '
-    s;\\;\\\\;g; :x; s;%([^0-9A-F]);\\045\1;g; tx;
-    # Hexadecimal { %00 - %FF } will be transformed to octal { \000 - \377 } for posix printf
-    s;%[0123].;&\\0;g; s;%[4567].;&\\1;g; s;%[89AB].;&\\2;g; s;%[CDEF].;&\\3;g;
-    s;%[048C][0-7]\\.;&0;g; s;%[048C][89A-F]\\.;&1;g; s;%[159D][0-7]\\.;&2;g; s;%[159D][89A-F]\\.;&3;g;
-    s;%[26AE][0-7]\\.;&4;g; s;%[26AE][89A-F]\\.;&5;g; s;%[37BF][0-7]\\.;&6;g; s;%[37BF][89A-F]\\.;&7;g;
-    s;%.[08](\\..);\10;g; s;%.[19](\\..);\11;g; s;%.[2A](\\..);\12;g; s;%.[3B](\\..);\13;g;
-    s;%.[4C](\\..);\14;g; s;%.[5D](\\..);\15;g; s;%.[6E](\\..);\16;g; s;%.[7F](\\..);\17;g;
-  ')"
+  printf "$(printf %s "$1" |sed -r "$HEX_DECODE")"
 }
 
 if [ -z "$REQUEST_METHOD" ]; then
@@ -103,35 +104,28 @@ fi
 [ -n "${DEBUG+x}" ] && env
 
 cgilite_count(){
-  case $1 in
-    GET)  printf %s "&${QUERY_STRING}";;
-    POST) printf %s "&${cgilite_post}";;
-    REF)  printf %s "&${HTTP_REFERER#*\?}";;
-  esac \
-  | grep -Eo '&'"$2"'=[^&]*' \
+  printf %s "&$1" \
+  | grep -oE '&'"$2"'=[^&]*' \
   | wc -l
 }
 
 cgilite_value(){
-  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; p;}'
-  )"
+  local str="&$1" name="$2" cnt="${3:-1}"
+  while [ $cnt -gt 0 ]; do
+    str=${str#*&${name}=}
+    cnt=$((cnt - 1))
+  done
+  printf "$(printf %s "${str%%&*}" |sed -r 's;\+; ;g;'"$HEX_DECODE")"
 }
 
-GET(){ cgilite_value GET $@; }
-GET_COUNT(){ cgilite_count GET $1; }
+GET(){ cgilite_value "${QUERY_STRING}" $@; }
+GET_COUNT(){ cgilite_count "${QUERY_STRING}" $1; }
 
-POST(){ cgilite_value POST $@; }
-POST_COUNT(){ cgilite_count POST $1; }
+POST(){ cgilite_value "${cgilite_post}" $@; }
+POST_COUNT(){ cgilite_count "${cgilite_post}" $1; }
 
-REF(){ cgilite_value REF $@; }
-REF_COUNT(){ cgilite_count REF $1; }
+REF(){ cgilite_value "${HTTP_REFERER#*\?}" $@; }
+REF_COUNT(){ cgilite_count "${HTTP_REFERER#*\?}" $1; }
 
 COOKIE(){
   HEX_DECODE "$(
-- 
2.39.2