bash-shell做CGI,用于获取HTTP POST提交的数据

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　　由于对HTTP/CGI的工作模式不了解，在网络上找了许久用shell做CGI来提取POST，最终找到了，发现年头挺久的了，http://www.fpx.de/fp/Software/ProcCGIsh.html（其中还有C实现和TCL实现）。
　　下载地址：http://www.fpx.de/fp/Software/proccgi.sh
　　贴出shell脚本内容：
　　

• #!/bin/sh
  
• #
  
• # Process input to a CGI script. Written and Copyright 1995 Frank Pilhofer
  
• # You may freely use and distribute this code free of charge provided that
  
• # this copyright notice remains.            fp@informatik.uni-frankfurt.de
  
• #
  
• # All variables in here are prefixed by _F_, so you shouldn't have
  
• # any conflicts with your own var names
  
• #
  
• # get query string. if $REQUEST_METHOD is "POST", then it must be read
  
• # from stdin, else it's in $QUERY_STRING
  
• #
  
• if [ ${DEBUG:-0} -eq 1 ] ; then
  
•     echo --Program Starts-- 1>&2
  
• fi
  
• #
  
• if [ "$REQUEST_METHOD" = "POST" ] ; then
  
•     _F_QUERY_STRING=`dd count=$CONTENT_LENGTH bs=1 2> /dev/null`"&"
  
•     if [ "$QUERY_STRING" != "" ] ; then
  
•         _F_QUERY_STRING="$_F_QUERY_STRING""$QUERY_STRING""&"
  
•     fi
  
•     if [ ${DEBUG:-0} -eq 1 ] ; then
  
•         echo --Posted String-- 1>&2
  
•     fi
  
• else
  
•     _F_QUERY_STRING="$QUERY_STRING""&"
  
•     if [ ${DEBUG:-0} -eq 1 ] ; then
  
•         echo --Query String-- 1>&2
  
•     fi
  
• fi
  
• if [ ${DEBUG:-0} -eq 1 ] ; then
  
•     ( echo "  " $_F_QUERY_STRING
  
•       echo --Adding Arguments-- ) 1>&2
  
• fi
  
• #
  
• # if there are arguments, use them as well.
  
• #
  
• for _F_PAR in $* ; do
  
•     _F_QUERY_STRING="$_F_QUERY_STRING""$_F_PAR""&"
  
•     if [ ${DEBUG:-0} -eq 1 ] ; then
  
•         echo "  " arg $_F_PAR 1>&2
  
•     fi
  
• done
  
• if [ ${DEBUG:-0} -eq 1 ] ; then
  
•     ( echo --With Added Arguments--
  
•       echo "  " $_F_QUERY_STRING ) 1>&2
  
• fi
  
• #
  
• # if $PATH_INFO is not empty and contains definitions '=', append it as well.
  
• # but replace slashes by ampersands
  
• #
  
• if echo $PATH_INFO | grep = > /dev/null ; then
  
•     _F_PATH_INFO="$PATH_INFO""//"
  
•     if [ ${DEBUG:-0} -eq 1 ] ; then
  
•         ( echo --Adding Path Info--
  
•           echo "  " $_F_PATH_INFO ) 1>&2
  
•     fi
  
• 
  
•     while [ "$_F_PATH_INFO" != "" -a "$_F_PATH_INFO" != "/" ] ; do
  
•         _F_QUERY_STRING="$_F_QUERY_STRING""`echo $_F_PATH_INFO | cut -d / -f 1`""&"
  
•         _F_PATH_INFO=`echo $_F_PATH_INFO | cut -s -d / -f 2-`
  
•     done
  
• fi
  
• #
  
• # append another '&' to fool some braindead cut implementations. Test yours:
  
• # echo 'i am braindead!' | cut -d '!' -f 2
  
• #
  
• _F_QUERY_STRING="$_F_QUERY_STRING""&"
  
• #
  
• if [ ${DEBUG:-0} -eq 1 ] ; then
  
•     ( echo --Final Query String--
  
•       echo "  " $_F_QUERY_STRING ) 1>&2
  
• fi
  
• #
  
• while [ "$_F_QUERY_STRING" != "" -a "$_F_QUERY_STRING" != "&" ] ; do
  
•     _F_VARDEF=`echo $_F_QUERY_STRING | cut -d \& -f 1`
  
• #   _F_QUERY_STRING=`echo $_F_QUERY_STRING | cut -d \& -f 2-`
  
•     _F_VAR=`echo $_F_VARDEF | cut -d = -f 1`
  
•     _F_VAL=`echo "$_F_VARDEF""=" | cut -d = -f 2`
  
• 
  
• #
  
• # Workaround for more braindead cut implementations that strip delimiters
  
• # at the end of the line (i.e. HP-UX 10)
  
• #
  
• 
  
•     if echo $_F_QUERY_STRING | grep -c \& > /dev/null ; then
  
•         _F_QUERY_STRING=`echo $_F_QUERY_STRING | cut -d \& -f 2-`
  
•     else
  
•         _F_QUERY_STRING=""
  
•     fi
  
• 
  
•     if [ ${DEBUG:-0} -eq 1 ] ; then
  
•         ( echo --Got Variable--
  
•           echo "  " var=$_F_VAR
  
•           echo "  " val=$_F_VAL
  
•           echo "  " rem=$_F_QUERY_STRING ) 1>&2
  
•     fi
  
•     if [ "$_F_VAR" = "" ] ; then
  
•         continue
  
•     fi
  
• 
  
• #
  
• # replace '+' by spaces
  
• #
  
• 
  
•     _F_VAL="$_F_VAL""++"
  
•     _F_TMP=
  
• 
  
•     while [ "$_F_VAL" != "" -a "$_F_VAL" != "+" -a "$_F_VAL" != "++" ] ; do
  
•         _F_TMP="$_F_TMP""`echo $_F_VAL | cut -d + -f 1`"
  
•         _F_VAL=`echo $_F_VAL | cut -s -d + -f 2-`
  
• 
  
•         if [ "$_F_VAL" != "" -a "$_F_VAL" != "+" ] ; then
  
•             _F_TMP="$_F_TMP"" "
  
•         fi
  
•     done
  
• 
  
•     if [ ${DEBUG:-0} -eq 1 ] ; then
  
•         echo "  " vrs=$_F_TMP 1>&2
  
•     fi
  
• 
  
• #
  
• # replace '%XX' by ascii character. the hex sequence MUST BE uppercase
  
• #
  
• 
  
•     _F_TMP="$_F_TMP""%%"
  
•     _F_VAL=
  
• 
  
•     while [ "$_F_TMP" != "" -a "$_F_TMP" != "%" ] ; do
  
•         _F_VAL="$_F_VAL""`echo $_F_TMP | cut -d % -f 1`"
  
•         _F_TMP=`echo $_F_TMP | cut -s -d % -f 2-`
  
• 
  
•         if [ "$_F_TMP" != "" -a "$_F_TMP" != "%" ] ; then
  
•             if [ ${DEBUG:-0} -eq 1 ] ; then
  
•                 echo "  " got hex "%" $_F_TMP 1>&2
  
•             fi
  
•             _F_HEX=`echo $_F_TMP | cut -c 1-2 | tr "abcdef" "ABCDEF"`
  
•             _F_TMP=`echo $_F_TMP | cut -c 3-`
  
• #
  
• # can't handle newlines anyway. replace by space
  
• #
  
• #           if [ "$_F_HEX" = "0A" ] ; then
  
• #               _F_HEX="20"
  
• #           fi
  
• 
  
•             _F_VAL="$_F_VAL""`/bin/echo '\0'\`echo "16i8o"$_F_HEX"p" | dc\``"
  
•         fi
  
•     done
  
• 
  
• #
  
• # replace forward quotes to backward quotes, since we have trouble handling
  
• # the former ones.
  
• #
  
• 
  
•     _F_VAL=`echo $_F_VAL | tr "'" '\`'`
  
• 
  
• #
  
• # if debug, send variables to stderr
  
• #
  
• 
  
•     if [ ${DEBUG:-0} -eq 1 ] ; then
  
•         ( echo --Final Assignment--
  
•           echo "FORM_$_F_VAR"=\'$_F_VAL\' ) 1>&2
  
•     fi
  
• 
  
• #   /bin/echo "FORM_$_F_VAR"=\'$_F_VAL\'
  
•     /bin/echo "FORM_$_F_VAR"="'"$_F_VAL"'"
  
• done
  
• #
  
• if [ ${DEBUG:-0} -eq 1 ] ; then
  
•     echo done. 1>&2
  
• fi
  
• #
  
• # done.
  
• #
  
• exit 0