KSH URI Decode Functions - From BASH snippet here: https://marc.waeckerlin.org/computer/blog/parsing_of_query_string_in_bash_cgi_scripts

cgi.ksh

#!/bin/ksh
# Decodes an URL-string
# an URL encoding has "+" instead of spaces
# and no special characters but "%HEX"
urlDec() {
  value=${*//+/%20}                         # replace +-spaces by %20 (hex)
  for part in ${value//%/ \\x}; do          # split at % prepend \x for printf
    printf "%b%s" "${part:0:4}" "${part:4}" # output decoded char
  done
}
 
# For all given query strings
# parse them an set shell variables
setQueryVars() {
  vars=${*//\*/%2A}                            # escape * as %2A
  for var in ${vars//\&/ }; do                 # split at &
    value=$(urlDec "${var#*=}")                # decode value after =
    value=${value//\\/\\\\}                    # change \ to \\ for later
    eval "CGI_${var%=*}=\"${value//\"/\\\"}\"" # evaluate assignment
  done
}

# HTML Encoding of a text
# quotes "&" to "&amp;", "<" to "&lt;", etc.
htmlEnc() {
  tmp=${*//&/&amp;}
  tmp=${tmp//</&lt;}
  tmp=${tmp//>/&gt;}
  echo "${tmp//\"/&quot;}"
}
 
# Execute the evaluation
# set all variables for both, POST and GET data
setQueryVars $QUERY_STRING $(</dev/stdin)

• Removed the local qualifiers.
• Changed the for var in ${vars//&/ }; do for ksh escaping behavior.
• Removed function before the function names.
• Added call to setQueryVars at bottom, just source the file and all the ${CGI_*} variables should be available.