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Bash script pulling variable from query_string

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# 1  
Old 04-06-2010
Bash script pulling variable from query_string
I have a variable embedded in a long string called "commands" coming in on a query_string. I need to copy the string to a file with the variable $loop1 converted before it writes. Right now, it writes the varible itself instead of what it should be.

QUERY_STRING
Code:
test.cgi?commands=cont+local%0D%0Aconfig%0D%0Acont+local%0D%0Aport+atm+3%2F0%0D%0Adescription+%24loop1%0D%0Acommit%0D%0A

Code:
#!/bin/sh
loop1="10.1.1.1"
echo "$QUERY_STRING" | sed -n 's/^.*commands=\([^&]*\).*$/\1/p' | nawk 'gsub(/%0D%0A/,"\n")' | sed 's/+/ /g;s/%24/\$/g;s/%2F/\//g' > cmd.list

This is what prints to the file:
Code:
cont local
config
cont local
port atm 3/0
description $loop1
commit

Here is what I need it to print:
Code:
cont local
config
cont local
port atm 3/0
description 10.1.1.1
commit

# 2  
Old 04-06-2010
Code:
$
$
$ echo $QUERY_STRING
test.cgi?commands=cont+local%0D%0Aconfig%0D%0Acont+local%0D%0Aport+atm+3%2F0%0D%0Adescription+%24loop1%0D%0Acommit%0D%0A
$
$ echo $loop1
10.1.1.1
$
$ echo $QUERY_STRING | perl -plne "s/%24loop1/$loop1/; s/^.*?=//; s/%0D%0A/\n/g; s/\+/ /g; s/%2F/\//g"
cont local
config
cont local
port atm 3/0
description 10.1.1.1
commit
$
$

tyler_durden
# 3  
Old 04-06-2010
Thank you durden_tyler. This works except I forgot to mention that the variable loop1 can be a loop1, loop2, loop3, etc. Also, there is an additional string called router which I pull out separately.
Code:
loop1="10.1.1.1"
loop2="10.1.1.2"
loop3="10.1.1.3"

QUERY_STRING:
Code:
test.cgi?commands=cont+local%0D%0Aconfig%0D%0Acont+local%0D%0Aport+atm+3%2F0%0D%0Adescription+%24loop1%0D%0Acommit&router=cisco.router.net



---------- Post updated at 05:52 PM ---------- Previous update was at 12:50 PM ----------

I added to the perl statement, but was hoping there is a way to shorten it up a bit.
Code:
echo $QUERY_STRING | perl -plne "s/%24loop1/$loop1/; s/%24loop2/$loop2/; s/%24loop3/$loop3/; s/^.*?=//; s/%0D%0A/\n/g; s/\+/ /g; s/%2F/\//g; s/&router=.*//"

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