一個解析cgi參數的SHELL腳本

時間 2019-11-11

標籤一個解析 cgi 參數 shell 腳本欄目 CGI 简体版

原文原文鏈接

http://www.cnblogs.com/mfryf/archive/2012/05/23/2514495.htmlhtml

測試工做中，常常會涉及到一些要驗證服務器對某些cgi接口查詢結果返回信息進行解析是否正確的狀況。而提供cgi接口的一般又是另外的部門，測試的時候須要調試一些返回結果不方便。因此須要本身模擬虛假的cgi接口來達到一樣的目的。web

好比說，相似http://www.yousite.com/query.cgi?username=***&kind=***這樣的接口會根據username和kind的值的不一樣返回6類結果，每一類結果，請求服務器都會針對地走不一樣的處理流程，這就須要每個返回結果都須要模擬到，因而乎，創建模擬的cgi接口勢在必行。之前本身也沒有接觸過cgi程序，翻了一些基礎資料發現整體框架也不是很複雜，而解析html發過來的參數有很多現成的程序可使用，不用本身寫了。由於只是須要簡單的模擬返回結果，因此用shell寫cgi程序，開始用了uncgi解析，配置很方便，具體方法能夠看：shell

http://www.midwinter.com/~koreth/uncgi.html服務器

後來又發現一個shell寫的解析程序proccgi.sh，彷佛在簡單的cgi接口中使用更方便app

proccgi.sh文件內容以下：框架

#!/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
fiide

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`測試

#
# Workaround for more braindead cut implementations that strip delimiters
# at the end of the line (i.e. HP-UX 10)
#this

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=""
fispa

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

　　使用方法：

在本身的cgi腳本中直接調用這個shell解析參數便可，如：

eval `proccgi.sh $*` # 能夠把proccgi.sh放在你服務器的cgi-bin目錄

若是上面的調用出錯，嘗試用絕對路徑調用 eval `/home/www/cgi-bin/proccgi.sh $*`

例子，好比有一個cgi接口，按照下面的參數調用：

http://your-website/cgi-bin/mycript?username=your_name&password=mypass

返回結果：

your_name

mypass

則，mycript的內容爲：

#!/bin/sh

eval `/home/www/cgi-bin/proccgi.sh $*`