>From: Eben King <eben1@tampabay.rr.com>
>Reply-To: slug@nks.net
>To: slug@nks.net
>Subject: Re: [SLUG] script to parse and compare an IP address
>Date: Sat, 1 Apr 2006 14:49:51 -0500 (EST)
>
>On Sat, 1 Apr 2006, Sick Twist wrote:
>
>>I am trying to write a script that parses an unknown IP address from a
>>page of HTML, compares the IP address to a file and overwrites the file if
>>the saved IP address is different.
>
>Gee, that sounds like what I had to do to embed my (dynamic) IP address in
>an HTML page.
>
>>My question is, what language should I investigate to accomplish this?
>
>I'd use {k,ba,}sh, since that's what I know well.
>
>>Is this able to be done with a bash script and command line utilities
>
>Yeah, or if you can use CGI you can write your pseudo-HTML with meta tags,
>and replace those tags at run time with your address. Makes the "extract
>the IP address" part trivially easy, but then you have to write a CGI
>script.
>
>sed -n '/ [1-9][0-9]*\.[1-9][0-9]*\.[1-9][0-9]*\.[1-9][0-9]* /s/^.*
>\([1-9][0-9]*\.[1-9][0-9]*\.[1-9][0-9]*\.[1-9][0-9]*\) .*$/\1/p' <
>file.html
>>address
>
>Just make sure the address is flanked by spaces in file.html .
>
>>or is there another language like perl or python that would be better
>>suited for this task? C has always been my game so I'm less familiar with
>>the strengths and capabilities of some of the other tools out there.
>
>Heck, use what you know. First-time code is usually pretty bad.
I don't need to create HTML, just pull an IP address out of it. Basically,
I have a string with an IP address in the middle and I need to write a
script that strips out just the IP address so that I can save it to a file.
I forgot about sed but will definitely read up on it.
-Jonathon
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