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Full Discussion: Extract URLs from HTML code using sed
Top Forums Shell Programming and Scripting Extract URLs from HTML code using sed Post 302375751 by drl on Sunday 29th of November 2009 09:06:06 AM
Old 11-29-2009
Hi.

You can use lynx to do most of the hard work:
Code:
#!/usr/bin/env bash

# @(#) s3	Demonstrate extraction of links with "lynx".

echo
set +o nounset
LC_ALL=C ; LANG=C ; export LC_ALL LANG
echo "Environment: LC_ALL = $LC_ALL, LANG = $LANG"
echo "(Versions displayed with local utility \"version\")"
version >/dev/null 2>&1 && version "=o" $(_eat $0 $1) lynx 
set -o nounset
echo

URL="http://www.google.com/search?q=chondroitin&num=100&start=200"

echo " Looking at URL: $URL"

echo
echo " Results:"
lynx -dump -listonly -hiddenlinks=ignore "$URL" |
grep -i -v google |
sed -e 's/^[ 	]*[0-9.]*[ 	]*//' > t1

echo " Extracted about $( wc -l <t1 ) non-google links; first 10:"
head -10 t1

exit 0

producing:
Code:
% ./s3

Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-2-amd64, x86_64
Distribution        : Debian GNU/Linux 5.0 
GNU bash 3.2.39
Lynx Version 2.8.7dev.9 (27 Apr 2008)

 Looking at URL: http://www.google.com/search?q=chondroitin&num=100&start=200

 Results:
 Extracted about 157 non-google links; first 10:

References

http://www.wisegeek.com/what-is-chondroitin.htm
http://74.125.95.132/search?q=cache:ZwdfFnJUbecJ:www.wisegeek.com/what-is-chondroitin.htm+chondroitin&cd=201&hl=en&ct=clnk&gl=us&ie=UTF-8
http://shaokang2002.en.busytrade.com/products/info/24144/_Chondroitin_sulphate.html
http://74.125.95.132/search?q=cache:B32adgCixNAJ:shaokang2002.en.busytrade.com/products/info/24144/_Chondroitin_sulphate.html+chondroitin&cd=202&hl=en&ct=clnk&gl=us&ie=UTF-8
http://www.ebmonline.org/cgi/content/abstract/226/2/144
http://www.ebmonline.org/cgi/content/abstract/230/4/255
http://linkinghub.elsevier.com/retrieve/pii/S0255270106002182

Some clean-up is done by getting rid of google references, and removing the initial whitespace and integer on each line ... cheers, drl
 

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LEARN ABOUT DEBIAN

gurlchecker

GURLCHECKER(1)						    http://labs.libre-entrepris 					    GURLCHECKER(1)

NAME

       gurlchecker - A graphical web link checker that works on a whole site, a single local page or a browser bookmarks file.

SYNOPSIS

       gurlchecker [-h|--help] [-v|--version] [-u|--http-user user] [-p|--http-passwd password] [-A|--no-urls-args] [URL]

DESCRIPTION

       This manual page documents the gurlchecker command.

       gurlchecker is a graphical web link checker. It searches URLs in a whole site, a single local page or a browser bookmarks page, checking
       them, one by one, in order to know their validity. Furthermore, it can manage entire projects.

OPTIONS

       This program follows the usual GNU command line syntax, with long options starting with two dashes (`-'). A summary of options is included
       below.

       -h, --help
	   Show summary of options.

       -v, --version
	   Show version of program.

       -u, --http-user
	   User name for HTTP Basic Authentication.

       -p, --http-passwd
	   Password for HTTP Basic Authentication.

       -A, --no-urls-args
	   Ignore URLs arguments.

	   With this option gurlchecker will systematically remove arguments on URLs. It is useful to avoid nasty infinite loops when arguments
	   are randomly generated, for example.

AUTHORS

       This manual page was written by Daniel Pecos Martinez <dani@netpecos.org> and Emmanuel Saracco <esaracco@users.labs.libre-entreprise.org>
       for the Debian system (but may be used by others). Permission is granted to copy, distribute and/or modify this document under the terms of
       the GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation; with no Invariant Sections,
       no Front-Cover Texts and no Back-Cover Texts.

AUTHORS

       Daniel Pecos Martinez
	   Author.

       Emmanuel Saracco
	   Author.

COPYRIGHT

       Copyright (C) 2003-2005 Daniel Pecos Martinez, Emmanuel Saracco

http://gurlchecker.labs.li					    Apr 8, 2009 						    GURLCHECKER(1)
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